TECHNIQUE FOR ESTIMATING FLOOD-PEAK DISCHARGES

AND FREQUENCIES ON RURAL STREAMS

IN ILLINOIS

By G. W. Curtis

U.S. GEOLOGICAL SURVEY

Water-Resources Investigations Report 87-4207

Prepared in cooperation with

ILLINOIS DEPARTMENT OF TRANSPORATION,

DIVISION OF WATER RESOURCES

Urbana, Illinois

1987

DEPARTMENT OF THE INTERIOR

DONALD PAUL HODEL, Secretary

U.S. GEOLOGICAL SURVEY

Dallas L. Peck, Director

For additional information write to:

District Chief U.S. Geological Survey Water Resources Division 102 E. Main St. , 4th Floor Urbana, IL 61801

Copies of this report can be purchased from:

U.S. Geological SurveyBooks and Open-File Reports SectionFederal CenterBox 25425Denver, CO 80225

CONTENTS

Page

Abstract............................. ................................... 1Introduction............................................................ 1Technique for estimating flood-peak discharges.......................... 2Application of estimating technique..................................... 3

Site on ungaged stream............................................. 3Site at gaged location............................................. 4Site near gaged location........................................... 5Regulated and urban streams..........,............................. 7

Accuracy and limitation of estimating technique......................... 7Data analyses........................................................... 8

Station flood-frequency analyses................................... 8Regional analyses.................................................. 10

Summary................................................................. 12References cited........................................................ 13

ILLUSTRATIONS

Figures1-4. Maps showing:

1. Location of streamflow data-collection sites inIllinois, Indiana, and Wisconsin..................... 16

2. Location of streamflow data-collection sites innortheastern Illinois, northwestern Indiana, and southeastern Wisconsin............................... 18

3. Distribution of rainfall intensity (24-hour2-year), I, in inches, in Illinois................... 19

4. Geographic regionsj R, in Illinois..................... 205. Graph showing regression constant and coefficients for

estimating equations, Qj, = a Ab Sc (1-2.5) d Rf............ 216. Flow diagram for determining flood-peak discharge........... 22

7-9. Graphs showing:7. Relation of flood-peak discharges for selected

recurrence intervals to drainage area, Big Muddy River, since 1970.......................... 23

8. Relation of flood-peak discharges for selected recurrence intervals to drainage area, Fox River............................................ 24

9. Relation of flood-peak discharges for selectedrecurrence intervals to drainage area, * ,; Illinois River....................................... 25

111

TABLES

Page

Table 1. T-year peak discharges at gaging stations.................... 262. Selected basin characteristics, years of record, equiva­

lent years of record, and maximum flood for nonregulated rural gaging stations...................................... 63

3. Regional factors, Rf......................................... 714. Accuracy of estimating equations, 0% = aAb Sc (1-2.5) d Rf... 715. Selected statistical characteristics for annual peak

discharges for nonregulated rural gaging stations.......... 72

GLOSSARY

Annual peak discharge. The highest instantaneous peak discharge in a water year.

Cubic foot per second (ftVs). The rate of discharge representing a volume of 1 cubic foot of water passing a given point during 1 second and is equiva­ lent to 7.48 gallons per second or 448.8 gallons per minute.

Discharge (Q). The rate of flow of water in a stream at a given place and within a given period of time, in cubic feet per second.

Drainage area (A). Contributing area from which surface runoff is carried away by a single drainage system, in square miles.

Equivalent years of record. A measure of the accuracy with which the regres­ sion model can estimate the Qrj, at a site, expressed in years.

Flood. A relatively high flow, as measured by either gage height or discharge, which usually overtops the natural banks along some reaches of a stream.

Flood peak. The highest value of the stage or discharge attained by a flood; thus, peak stage or peak discharge.

Flood frequency. The average interval of time within which a given flood peak will be exceeded once (see recurrence interval).

Gaging station. A particular site on a stream where systematic observations of gage height and discharge are obtained.

Probability. The likelihood or chance that a flood or storm will occur or that the magnitude of a flood or storm will be exceeded.

QT . The discharge for a recurrence interval of T-years. The annual peak dis- charge will be exceeded once every T-number of years on the average.

Rainfall intensity (I). The maximum 24-hour rainfall, in inches, that has a recurrence interval of 2 years.

iv

Recurrence interval. The average interval of time (T-years) within which a given hydrologic phenomenon will be exceeded once. Also called return period.

Regional factor (Rf). A factor used to remove geographic bias in an esti­ mating equation, dimensionless.

Regression equation. A mathematical relation between a dependent variable and one or more independent variables.

Regulated stream. A stream that has been subjected to control by reservoirs/ diversions, or other manmade hydraulic structures.

Rural stream. A stream in which the drainage area is predominantly rural. In general, the drainage area contains not more than about 5 percent urbanization.

Slope (S). The main channel slope, in feet per mile. It is based on the dif­ ference of elevations divided by distance between points 10 percent and 85 percent of the total distances measured along the low-water channel of the stream from the site to the basin divide.

Standard error of prediction. A measure of the accuracy with which a regres­ sion model estimates the QT flood at a site, expressed in percent. The true value of the Qrp will occur within the standard error of prediction percent of the predicated value about two times out of three.

T-year flood. The average interval of time (T) that a flood-peak discharge will be exceeded, in years. See QT «

Water year. The 12-month period from October 1 to September 30, during which streamflow data are collected, compiled, and reported.

CONVERSION FACTORS

For the convenience of readers who may want to use metric (International System) units, the inch-pound values in this report may be converted by using the following factors:

Multiply inch-pound unit By To obtain metric unit

foot (ft) 0.3048 meter (m)

foot per mile (ft/mi) 0.1894 meter per kilometer (mAm)

cubic foot (ft 3 ) 0.02832 cubic meter (m3 )

cubic foot per second (ft3 /s) 0.02832 cubic meter per second (m 3 /s)

inch (in.) 25.4 millimeter (mm)

mile (mi) 1.609 kilometer (km)

square mile (mi 2 ) 2.590 square kilometer (km2 )

TECHNIQUE FOR ESTIMATING FLOOD-PEAK DISCHARGES AND

FREQUENCIES ON RURAL STREAMS IN ILLINOIS

By G. W. Curtis

ABSTRACT

Flood-peak discharges and frequencies are presented for 394 gaged sites in Illinois/ Indiana, and Wisconsin for recurrence intervals ranging from 2 to 100 years. A technique is presented for estimating flood-peak discharges at recurrence intervals ranging from 2 to 500 years for nonregulated streams in Illinois with drainage areas ranging from 0.02 to 10/000 squares miles. Multiple-regression analyses/ using basin characteristics and peak streamflow data from 268 of the 394 gaged sites/ were used to define the flood-frequency relation. The most significant independent variables for estimating flood- peak discharges are drainage area/ slope/ rainfall intensity/ and a regional factor. Examples are given to show a step-by-step procedure in calculating a 50-year flood for a site on an ungaged stream/ a site at a gaged location/ and a site near a gaged location.

INTRODUCTION

The purpose of this report is to provide updated station flood-peak dis­ charges and frequencies and to provide improvement to the previous techniques for estimating flood-peak discharges and frequencies of floods for sites on most streams where flood discharges are not significantly affected by regula­ tion or urbanization. Flood-peak discharges and frequencies are presented for 394 gaging stations in Illinois/ Indiana/ and Wisconsin for recurrence inter­ vals of 2/ 5/ 10/ 25/ 50/ and 100 years. A technique using drainage area (A)/ slope (S)/ rainfall intensity (I)/ and regional factor (Rf) was developed for estimating flood-peak discharges at ungaged sites in Illinois. Equations using these variables are applicable for estimating flood-peak discharges for recurrence intervals of 2 to 500 years for drainage areas ranging from 0.02 to 10/000 square miles (mi 2 ) on nonregulated rural streams. Estimates of future floods are necessary for the proper design of engineering projects such as bridges/ culverts/ highways/ and flood-control structures; for establishment of actuarial flood-insurance rates; and for proper flood-plain management by State and local agencies.

Previous techniques for estimating flood-peak discharges and frequencies in Illinois have been provided by Mitchell (1954)/ Speer and Gamble (1965)/ Wiitala (1965)/ Patterson and Gamble (1968)/ Ellis (1968)/ Cams (1973)/ Curtis (1977a)/ and Alien and Bejcek (1979). Techniques were developed by Cams (1973)/ Curtis (1977a)/ and Alien and Bejcek (1979) using ordinary least

squares multiple-regression analyses as recommended by Thomas and Benson (1970). Additional data and improved analytical methods used in this report increase the confidence in estimating techniques over those published in earlier reports.

This report was prepared under a cooperative agreement between the State of Illinois, Department of Transportation, Division of Water Resources, and the U.S. Geological Survey (Survey). Streamflow data were collected in coop­ eration with the U.S. Army Corps of Engineers and State and local agencies.

TECHNIQUE FOR ESTIMATING FLOOD-PEAK DISCHARGES

Annual peak discharges from gaging stations having a minimum of 10 years of record through the 1985 water year were used to define station flood- frequency relations. Locations of these stations are shown in figures 1 and 2. The map number, identification number, name, geographic location, and station flood-peak discharges for the stations are listed in table 1. All figures and tables are grouped in the back of the report for easy reference.

Station flood-frequency relations were defined using the Hydrology Subcommittee of Interagency Advisory Committee on Water Data (1982), formerly U.S. Water Resources Council, guidelines. These guidelines outline procedures to fit the logarithms of observed annual peak discharges to the Pearson Type III frequency distribution.

Peak discharges of various recurrence intervals and basin characteristics for gaging stations were used in multiple-regression analyses to develop esti­ mating equations for flood-peak discharges and frequencies on nonregulated rural streams in Illinois. Data from stations affected by either urbanization or by regulation were not included in the regression analyses. Relations were developed for estimating flood-peak discharges corresponding to the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year recurrence-interval flood (T-year flood or Qrp). The regression analyses indicated that the independent variables drainage area (A), slope (S), rainfall intensity (I), and regional factor (Rf) are the most significant variables to use in estimating flood-peak discharges for Illinois streams. One estimating equation for each recurrence interval provides a straightforward technique to compute flood-peak discharges for both small and large Illinois streams. Flood-peak discharges and frequencies, basin charac­ teristics and other pertinent data, and regional factors are tabulated in tables 1, 2, and 3. In table 1, two sets of station flood-peak discharges are presented for two stations (Nos. 385 and 389) on the Big Muddy River. The first set of discharges are for periods of nonregulated flow and were used in the regression analyses. The second set of discharges are for periods ofregulated flow and were not used in the regress: .on analyses.

The reliability of flood-frequency estimates is uncertain for very large recurrence intervals. Because of this uncertainty, the 500-year flood dis­ charges are omitted from table 1. An estimating equation for the 500-year flood is provided primarily for planners who are required to compute this event for special purposes such as flood-insurance studies. Only those stations used in the regression analyses are listed in table 2.

The flood-frequency and the regression analyses, used to develop the estimating technique, are defined in detail in the data-analyses section.

Flood-peak discharge equations, applicable statewide, for estimating Qrp on nonregulated rural streams are as follows:

Q2 - 40.3 A0 ' 790 S°' 481 (1-2.5)°' 677 Rf (1)

Q5 - 66.4 A0 ' 786 S°' 513 (1-2.5)°' 719 Rf (2)

Q 10 - 83.0 A0 ' 785 S°' 532 (1-2.5)°' 742 Rf (3)

Q25 = 103 A0 * 786 s°* 552 (1-2.5)°' 768 Rf (4)

Q50 = 118 A0 * 786 s°* 566 (1-2.5)°' 786 Rf (5)

Q 100 - 132 A0 ' 787 S°' 578 d-2.5)°' 803 ^ (6)

Q500 = 162 A0 ' 789 S°' 601 (1-2.5)°' 838 Rf (7)

The four variables required to solve the equations are drainage area (A), slope (S), rainfall intensity (I), and regional factor (Rf). Drainage area and slope are determined from topographic maps. Drainage area is the area contrib­ uting to surface runoff. Slope is determined between points 10 percent and 85 percent of the total distance measured along the low-water channel from the site to the basin divide. The rainfall intensity is determined from figure 3. The regional factor is determined by first selecting the region number from figure 4 and then the appropriate regional factor from table 3.

Flood-peak discharge equations for recurrence intervals between 2 and 100 years, other than those in equations 1 to 7, may be developed by interpolating the regression constant and coefficients from the graphs in figure 5.

APPLICATION OF ESTIMATING TECHNIQUE

The technique for estimating flood-peak discharges and frequencies is applicable to either ungaged or gaged nonregulated rural streams. Figure 6 shows the sequence to follow for estimating a flood-peak discharge at a site. Step-by-step procedures for applying the estimating technique are given in the examples that follow.

Site on Ungaged Stream

Flood frequency estimates at sites on ungaged streams are calculated using equations 1 to 7.

Example 1: Computation of the 50-year recurrence interval flood at a site on an ungaged stream:

1. Determine the size of contributing drainage area (A), in square miles. The area can be planimetered on topographic, county, or other maps suitable for delineating the basin boundary. For this example, assume A = 625 mi^.

2. Determine the slope (S), in feet per mile (ft/mi). Slope isbased on the difference of elevations divided by distance between points 10 percent and 85 percent of the total distance measured along the low-water channel of the stream from the site to the basin divide. For this example, assume S = 2.5 ft/mi.

3. Determine the rainfall intensity (I), in inches, from figure 3. The value of I should be an average for the basin. For this example, assume I = 3.1 inches.

4. Determine the region (R) and the regional factor (Rf) from figure 4 and table 3, respectively. For this example, R is III and Rf is 0.862.

5. Select equation 5 from page 3 and compute the flood magnitude.

Q50 = 118 A0 - 786 s°' 566 (1-2.5)°' 786 Rf

= (118)(625)°- 786 (2.5)°- 566 (3.1-2.5)°- 786 (0.862)

= (118)(157.6)(1.68)(0.669)(0.862)

= 18,000 ft 3 /s.

Site at Gaged Location

Flood frequency estimates at gaged sites are combinations of the gaging station frequency curve and the equation estimates. The equivalent years of record concept (Hardison, 1971) was used to obtain weighted estimates of peak flow at gaged sites using estimates obtained from station records and from equations 1 to 7. This procedure was described by the Hydrologic Subcommittee (1982) and is expressed in the equation

Om Yrs of record (log sta. QT ) + Eg yrs record (log regional QT ) t

Yrs of record + Eq yrs record

In equation 8, station QT is obtained from the first line of discharge valuesin table 1 and converted to a logarithm (log).mined from table 2. The regional Qip is computed using the desired regionalestimating equation on page 3 or obtained from

The years of record are deter-

the second line of dischargevalues in table 1 and then transformed into logs. The station equivalent years of record (Eq yrs record) for the equation are also given in table 2. The antilog of the result from equation 8 is the weighted estimate of the sta­ tion flood discharge.

Example 2: Computation of the weighted 50-year recurrence interval flood at the gaging station 05572000 Sangaraon River at Monticello, Illinois (map No. 307) :

Yrs of record (log sta. Qcn) + Eq yrs record (log equation

Yrs of record + Bq yrs record

76(4.23553) + 5.5(4.15229)76 + 5.5

= 344.73788 81.5

= 4.22991

ft 3 /s.

For convenience, the weighted estimates for a station have been tabulated in the third line of values in table 1 . Equation 8 may be used to update the values of line 3 in table 1 as additional years of record are obtained.

Site near Gaged Location

Flood frequency estimates at a site near a gaging station on the same stream can be calculated by a combined use of the estimating equations 1 to 7 and the nearby station data. The following procedure is suggested for use if the site has a drainage area within 50 percent of the drainage area of the gaging station. Define the ratio, r:

r = (9)QT (gage, eq. 1-7)

This ratio represents the correction needed to adjust the estimating equation value to the gage weighted value. The following equation, derived by Sauer (1974), gives the adjustment factor, r 1 , for a site that is near a gaged site on the same stream:

r' = r - -r r- (r-1.00). (10) 0.

In equation 10, AA is the difference between the drainage areas of the site and the gaged site, and AQ is the drainage area at the gaged site. The adjusted Qip for a site is computed using the equation:

QT (adjusted) = Qj, (eq. 1-7) r 1 . (11)

If the drainage area of the site differs by more than 50 percent of the gaged site, that is, AA/Ag is greater than 0.5, equation 11 should not be used, and the results of estimating equations 1 to 7 should be used without adjustment.

Example 3: For this example, assume the site in example 1 is located on the Sangamon River downstream from gaging station 05572000 Sangamon River at Monticello, Illinois (map No. 307). The drainage area, from table 2, is 550 mi 2 for the gaging station. The procedure is as follows:

First computation:

1-5. Same as example 1, site Q50 = 18,000 ft 3 /s.

Second computation:

6. Same as example 2, gage weighted Q50 "= 17,000 ft 3 /s; or, the weighted may be selected from table 1, line 3 for station 05572000.

Third computation:

7. From table 1, select the Q5Q that was computed using equation 5 for the station (second line). Q50 = 14,200 ft 3 /s.

8. AA _ 625-550 _ 0 14 [This is less than 0.5, therefore, r 1 should AQ 550 " " be computed and used to adjust Q5g (eq. 5).]

9. Compute the adjustment ratio, r, using equation 9.

= weighted) _ 17,000 ft 3 /s _ 1>2 Q.

Q50 (gage, eq. 5) 14,200 ft 3 /s

10. Compute the adjustment factor, r 1 , using equation 10.

r 1 = r - n AA (r-1.00) 0.5AG

11. Compute the adjusted Q5g at the site using equation 11

Q50 (adjusted) = Q5Q (eq. 5) r 1

= 18,000 ft 3/s (1.15)

= 20,700 ft 3 /s.

This is the best estimate for the ung&ged site on the Sangamon River.

The site for which flood- frequency calcul.ations are desired may sometimes be between two gaged sites on the same stream. The 50-percent rule should be applied to determine which gaged site, if any, should be used to make the adjustment. If the ungaged site is within 50 percent of both gaged sites, the frequency calculations for the ungaged site can be made by interpolation of the weighted station values Qrp for each gaged site. Again, interpolation should be on the basis of drainage area.

Regulated and Urban Streams

The regional equations are not appropriate for making flood-frequency estimates on the main stem of the following regulated streams:

Big Muddy RiverFox RiverIllinois RiverSaline River (below mouth of Cypress Ditch).

Flood peaks on these streams are altered by channel improvements, levees, dams, diversion, or interbasin flow. For the Big Muddy, Fox, and Illinois Rivers, flood frequencies may be estimated for ungaged sites by interpolation between gaged sites on the basis of drainage area. This interpolation is facilitated by the graphs shown in figures 7 through 9.

Many of the flood discharges recorded for Saline River near Junction include interbasin flow from the Wabash River through Cypress Ditch just up­ stream from the gaging station. The magnitude of the interbasin flow depends on the stages of the Wabash River that, in turn, are dependent on the stages of the Ohio River. Frequently the stages of the Saline River near Junction are affected by backwater from the Ohio River. The complexity of flood conditions precludes the use of the regionalized equations for estimating the frequency of floods on the Saline River downstream from Cypress Ditch.

Alien and Bejcek (1979) presented a technique for estimating flood-peak discharges and frequencies on urban streams in northeastern Illinois. A suggested transferability-of-urban-effeet technique was also presented. It was assumed that the effects of urbanization on flood peaks in northeastern Illinois may be similar to urban effects in other parts of Illinois. Based on this assumption, the equations for rural streams on page 3, along with proce­ dures in the report by Alien and Bejcek (1979), may be used to estimate flood frequencies on urban streams in other parts of Illinois. These estimates should be checked by any other available methods.

ACCURACY AND LIMITATION OF ESTIMATING TECHNIQUE

The accuracy of equations 1 to 7 is expressed by the standard error of prediction, in percent and in equivalent years of record. The standard error of prediction (Stedinger and Tasker, 1986b) is a measure of the accuracy with which the regression model can estimate the T-year flood at an ungaged site. The true value of the T-year flood in log units will be within plus or minus one standard error of prediction from the predicted value about two times out of three. The standard error of prediction was determined in log units and converted to percent and equivalent years of record by techniques given in Hardison (1971). Equivalent years of record indicates the number of years of streamflow record that provides an estimate equal in accuracy to the standard error of prediction.

The accuracy of equations 1 to 7 is summarized in table 4. The equivalent years of record in table 4 represents an average equivalent year of record for the estimating equations. Individual station equivalent years of record from table 2 should be used in equation 8 for weighting the independent estimates.

The flood-frequency equations in this report may be used to estimate flood-peak discharges and frequencies on most Illinois nonregulated rural streams for drainage areas ranging from 0.02 to 10,000 mi 2 , slopes ranging from 0.7 to 230 ft/mi, and 24-hour 2-year rainfall intensity from 2.6 to 3.6 inches. The equations are not applicable to streams where floodflows are appreciably affected by natural or reservoir storage; channel changes; diversions; urbanization; unusual hydrogeologic or morphologic conditions such as in karst terrane, bluff-flood plain combinations (streams that transverse the bluff and adjacent flood plain of major rivers); or other unaccounted for conditions that affect floodflow.

DATA ANALYSES

Discharge data used in the station flood-frequency and regional analyses were obtained from the surface-water gaging-station network maintained by the Survey. Annual peak discharges from 394 continuous-record and crest-stage partial-record stations having 10 years or more of record were used in the flood-frequency analyses. Of these stations, 383 are located in Illinois, 4 in Indiana, and 7 in Wisconsin (figs. 1 and 2). Peak flows from 268 of the 394 stations represent nonregulated rural sites, and these data were used in the regional analyses. Annual peak-flow records collected through September 30, 1985, were used in this report.

Drainage area (A) and slope (S) were determined from either topographicmaps, field surveys, aerial photographs, or asThe rainfall intensity (I) represents the 24-hour 2-year rainfall-durationfrequency and was determined from Hershfield (

published in Survey reports.

1961).

The map number, station number, and station name and location for the 394 stations are shown in table 1.

Station Flood-Frequency Analyses

Flood-frequency analyses define the relation of flood-peak discharges to exceedance probabilities or recurrence intervals. Exceedance probability is the chance that a given discharge will be exceeded in any one year. Recurrence interval is the reciprocal of the exceedance probability times 100 and is the average time interval between occurrences of a flood-peak discharge of a given or greater magnitude. For example, a flood having an exceedance probability of 0.01 has a recurrence interval of 100 years; or, a 100-year flood may be exceeded on the average of once in 100 years. I However, probability only describes the likelihood of a random event occurring, and a flood magnitude of a given recurrence interval may be exceeded in] a much shorter period of time.

Flood-frequency relations for 394 gaging stations were defined using the Hydrology Subcommittee of Interagency Advisory Committee on Water Data (1982) guidelines. These guidelines outline procedures to fit logarithms of observed annual-peak data to the Pearson Type III distribution.

A computer was used to perform frequency computations and plots for 394 gaging stations. The computer calculated the following:

An array of N annual flood-peak discharges (Q) at a station were transformed into an array of corresponding base 10 logarithmic values (X)

XN

and the means of the logarithms were computed by

_ rvX = ±± . (12)

N

Next the standard deviation (SD) and skew coefficient (G) were computed by

SD(ZX2 )-(ZX) 2/N

(N-1)

and N Z(X-X) 3

0.5(13)

J_. _ respectively.

(N-1)(N-2)(SD) 3 (14)

The technique for fitting log-Pearson Type III distributions to observed annual peaks is to compute the base 10 logarithms of the discharge (Q) at selected exceedance probability (P) by the equation

Log Q = X + K(SD) (15)

where X is the mean of the logs of the annual peaks at a gaging station,and

K is a factor from tables in Hydrology Subcommittee (1982) that is a function of the skew coefficient (G) and selected exceedance probability.

The skew coefficient of peak flows at a station is sensitive to extreme events. Therefore, accurate estimates of skew require a long period of record. A generalized estimate of skew is recommended (Hydrology Subcommittee, 1982) for stations with short periods of record.

For this study, logarithms of annual-peak discharges were fitted to the Pearson Type III distribution giving weight to historical peaks and high out­ liers, omitting low outliers, and using the generalized skew map of the Hydrology Subcommittee (1982). For stations having less than 25 years of record, the generalized skew was used for computing the frequency relation. For those stations with record lengths longer than 25 years, the station skew was weighted with the generalized skew. A weighted skew is calculated by com­ bining the station and generalized skew coefficients using the equation:

MSEp(G) + MSEr (G~)GW = - £ ' (16)

+ MSE

where GW = weighted skew coefficient,

G = station skew,

(3 = generalized skew,= mean-square error of generalized skew, and

= mean-square error of station skew

The flood-frequency curves for the individual stations were computed using equation 14. The discharge values from the individual station curve for recurrence intervals of 2, 5, 10, 25, 50, and 100 years are given in table 1. Log-Pearson Type III statistics used to develop the frequency relations for each station are shown in table 5.

Regional Analyses

Most sites where streamflow information is needed will not have stream- flow records available. Flood-peak discharges from individual stations have limited transferability; therefore, estimates of flood-peak discharges at ungaged sites should be based on regional analyses. The advantages of regional analyses are that (1) the flood-frequency relation is applicable to all ungaged sites in an entire region, and (2) the relation can improve the flood-frequency estimates at a gaged site.

Traditionally, regression models have used ordinary least squares (OLS)to estimate relations between steamflow chara :teristics and relevant physio­graphic variables such as drainage area and channel slope. Several investiga­ tors (Matalas and Benson, 1961; Matalas and Gilroy, 1968; Hardison, 1971; Moss and Karlinger, 1974; Tasker and Moss, 1979; and Moss, 1976, 1979) have examined the statistical precision and properties of OLS procedures with hydrologic data sets. The OLS approach can provide distorted estimates of the model's predic­ tive capability and the precision with which the regression model's parameters are estimated. Weighted (WLS) and generalized least squares (GLS) techniques were developed to deal with situations like those encountered in hydrology where a regression model's residuals are heteroscedastic and perhaps cross- correlated (Draper and Smith, 1981; Johnston, 1972). Stedinger and Tasker (1985, 1986a) compared the statistical performance of OLS, WLS, and GLS in situ­ ations where streamflow records at gaged sites can be of different and widely varying lengths and concurrent flows at different sites are cross-correlated. They found that the GLS procedure was superior and provided (1) more accurate parameter estimates, (2) better estimates of the accuracy with which the regres­ sion model's parameters were estimated, and (3) almost unbiased estimates of the model error.

A new improved statistical model (G. D. Tasker, A. M. Lumb, W. O. Thomas, and K. M. Flynn, U.S. Geological Survey, written commun., 1987) for analyzing hydrologic data was used in this study. This model, which uses GLS in a multiple regression analysis, was used to define the flood-frequency relations in equations 1 to 7.

Multiple-regression analyses were used to relate peak flows as dependent variables to the basin characteristics and a climatic factor as independent variables. Variables were transformed to a log of base 10 before analyses for

10

the principal reasons to (1) linearize the regression equation, (2) stabilize the variance of the residuals about the regression equation, and (3) normalize the distribution of the residuals about the regression equation. After analy­ ses, the log equations were transformed by taking the antilog into the final equation format as shown in equation 17. Discharges corresponding to the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year recurrence-interval flood were defined at 268 nonregulated rural gaging stations by using the log-Pearson Type II:E distribution and were regressed against the basin and climatic variables using the multiple regression model:

QT = aAbBc .......Nn (17)

where QT = flood-peak discharge, in cubic feet per second, havinga T-year recurrence interval,

A,B,...N = drainage basin and climatic variables, b,c,...n = regression coefficients, and

a = regression constant.

Combinations of independent variables such as drainage area, main channel length, slope, storage (lakes and ponds), forest cover, soil index factor, and rainfall intensity index were evaluated in a preliminary ordinary multiple regression analyses for computing the dependent variable T-year recurrence interval flood. Only the significant independent variables were used in the GLS analysis, and they are drainage area (A), slope (S), and rainfall inten­ sity (I).

Curtis (1977b) showed that significant differences in flood peaks could be related to geographic regions of the State as well as to drainage area, slope, and rainfall intensity. The boundaries for the geographic regions were delineated based on physiographic divisions, drainage-basin boundaries, and residual patterns. To account for geographic variation, a regional factor (Rf) was included in the regression analyses. A technique by Tasker (G. D. Tasker, U.S. Geological Survey, Reston, Virginia, written comraun., 1986) was used to compute the regional factors. The factors were computed using "dummy" variables in the regression analyses. Detailed explanations of dummy variables in regressions can be found in Draper and Smith (1981) and Montgomery and Peck (1982).

Equations 1 to 7 are applicable statewide. Data for 268 nonregulated rural stations having drainage areas ranging from 0.02 to 9,500 mi 2 and slopes from 0.74 to 229 ft/mi were used to develop the equations. The variables required to solve the equations are drainage area (A), slope (S), rainfall intensity (I) and regional factor (Rf).

Drainage area represents the area that contributes to direct surface run­ off, in square miles. Slope, in feet per mile, is the main-channel slope and is determined between points 10 percent and 85 percent of the total distance measured along the low-water channel from the site to the basin divide. Drainage area and slope are determined from topographic maps.

The rainfall intensity is the maximum 24-hour rainfall, in inches, expected to be equaled or exceeded on an average of once every 2 years.

11

Rainfall intensity (fig. 3) was obtained from Hershfield (1961). A constant of 2.5 was subtracted from the rainfall intensity to obtain the best fit to the linear regression equation.

The regional factor (table 3) removes regional bias and is dimensionless. The State is divided into four regions (fig. 4). The regions are the same as the areas defined in a previous study by Curtis (1977b).

Equations 1 to 7 may be used to improve the flood estimates at a gaged site. A procedure for weighting the flood estimates from the regional equa­ tions with the flood estimates from station data is provided in the Hydrology Subcommittee (1982) guidelines and in Curtis (1977a). This procedure is shown on page 6 and is based upon the assumption that the estimates are independent, which for practical purposes is true in mostj situations.

In table 1, the independent estimates of flood discharges were weighted using equation 8 to calculate the "best" flood estimates for the 268 stations used in the regional analysis.

Flood estimates for an ungaged site on a gaged stream may be improved by adjusting the ungaged site flood estimates with the flood estimates at the gaged site. Equation 11 provides a procedure for adjusting the site estimates.

SUMMARY

Equations, maps, tables, and graphs are^ presented to provide a means for estimating flood-peak discharges having recurrence intervals of 2, 5, 10, 25, 50, 100, and 500 years for nonregulated rural streams in Illinois. The flood- frequency equations may be used to estimate discharges on most streams ranging from 0.02 to 10,000 mi^ with slopes ranging from 0.7 to 230 ft/mi. A proce­ dure is provided for weighting independent estimates of discharge at a gaging station.

Graphical relations of station flood-peak discharges versus drainage area are presented for the regulated Big Muddy, Fox, and Illinois Rivers. For these streams, flood-peak discharges may be estimated for ungaged sites by interpola­ tion between stations on the basis of drainage area. Suggested procedures for estimating flood discharges on urban streams in northeastern Illinois and for transferring urban effect on stream estimates to other parts of Illinois are discussed.

Flood-frequency relations were defined for 394 gaged sites using the log-Pearson Type III frequency distribution and guidelines outlined by the Hydrology Subcommittee (1982). Two hundred pixty-eight (268) of the 394 sta­ tions were used in multiple regression analyses using a new improved procedure (G. D. Tasker, A. M. Lumb, W. O. Thomas, and K. M. Flynn, U.S. Geological Survey, written commun., 1987) to develop statewide estimating equations.

The regression analyses indicated that the independent variables drainage area (A), slope (S), rainfall intensity (I), and a regional factor (Rf) are the most significant for estimating flood peaks on Illinois streams. These

12

variables result in estimating flood-peak values with a standard error of model ranging from 34.9 to 50.3 percent. One estimating equation for each recurrence interval provides a straightforward technique for describing flood- peak discharges on both small and large streams in Illinois.

REFERENCES CITED

Alien, H. E. , Jr., and Bejcek, R. M., 1979, Effects of urbanization on the magnitude and frequency of floods in northeastern Illinois: U.S. Geological Survey Water-Resources Investigations 79-36, 48 p.

Cams, J. M. , 1973, Magnitude and frequency of floods in Illinois: Illinois Department of Transportation, Division of Water Resources Management, 599 p.

Curtis, G. W. , 1977a, Technique for estimating magnitude and frequency offloods in Illinois: U.S. Geological Survey Water-Resources Investiga­ tions 77-117, 70 p.

1977b, Frequency analysis of Illinois floods using observed and synthetic streamflow records: U.S. Geological Survey Water-Resources Investigations 77-104, 32 p.

Draper, N. R., and Smith, H., 1981, Applied regression analysis, 2nd ed.: John Wiley, New York, p. 241-257.

Ellis, D. W., 1968, Floodflows from small drainage areas in Illinois: prelimi­ nary flood-frequency relations: U.S. Geological Survey Open-File Report, 10 p.

Hardison, C. H., 1971, Prediction error of regression estimates of streamflow characteristics at ungaged sites: U.S. Geological Survey Professional Paper 750-C, p. C228-C236.

Hershfield, D. M., 1961, Rainfall frequency atlas of the United States: U.S. Weather Bureau Technical Paper 40, 115 p.

Hydrology Subcommittee of Interagency Advisory Committee on Water Data, 1982, Bulletin 17B, Guidelines for determining flood flow frequency: U.S. Geological Survey, Office of Water Data Coordination, Reston, Virginia, 183 p.

Johnston, J., 1972, Econometric methods: McGraw-Hill, New York.

Matalas, N. C., and Benson, M. A., 1961, Effects of interstation correlation on regression analysis: Journal of Geophysical Research, v. 66, no. 10, p. 3285-3293.

Matalas, N. C., and Gilroy, E. J., 1968, Some comments on regionalization inhydrologic studies: Water Resources Research, v. 4, no. 6, p. 1361-1369.

Mitchell, W. D., 1954, Floods in Illinois: magnitude and frequency: Illinois Department of Public Works and Buildings, Division of Waterways, 386 p.

Montgomery, D. C., and Peck, E. A., 1982, Introduction to linear regressionanalysis: John Wiley, New York, p. 216-243.

Moss, M. E., 1976, Design of surface water data networks for regionalinformation: Hydrological Sciences Bulletin, v. 21, no. 1, p. 113-127.

1979, Space, time, and the third dimension (model error): Water Resources Research, v. 15, no. 6, p. 1797-1800.

13

Moss, M. E., and Karlinger, M. R., 1974, Surface water network design byregression analysis simulation: Water Resources Research, v. 10, no. 3, p. 427-433.

Patterson, J. L., and Gamble, C. R. , 1968, Magnitude and frequency of floods in the United States, Part 5, Hudson Bay and Upper Mississippi River basin: U.S. Geological Survey Water-supply Paper 1698, 546 p.

Sauer, V. B., 1974, Flood characteristics of Oklahoma streams: U.S. Geological Survey Water-Resources Investigations 52-73, 301 p.

Speer, P. R., and Gamble, C. R., 1965, Magnitude and frequency of floods in the United States, Part 3-A, Ohio River basin except Cumberland and Tennessee Rivers basins: U.S. Geological Survey Water-supply Paper 1675, 630 p.

Stedinger, J. R., and Tasker, G. D., 1985, Regional hydrologic analysis, 1, ordinary, weighted, and generalized least squares compared: Water Resources Research, v. 21, no. 9, p. 1421-1432.

- 1986a, Correction to "Regional hydrologic analysis, 1, ordinary,weighted, and generalized least squares compared": Water Resources Research, v. 22, no. 5, p. 844.

1986b, Regional hydrologic analysis, 2, model-error estimators, estima­ tion of sigma and log-Pearson 3 distributions: Water Resources Research, v. 22, no. 10, p. 1487-1499.

Tasker, G. D., and Moss, M. E., 1979, Analysis of Arizona flood data network for regional information: Water Resources Research, v. 15, no. 6, p. 1791-1796.

Thomas, D. M., and Benson, M. A., 1970, Generalization of streamflow charac­ teristics from drainage-basin characteristics: U.S. Geological Survey Water-Supply Paper 1975, 55 p.

Wiitala, S. W., 1965, Magnitude and frequency of floods in the United States, Part 4, St. Lawrence River basin: U.S. Geological Survey Water-supply Paper 1677, 357 p.

14

Figures 1 to 9; Tables 1 to 5

cr>

EX

PLA

NA

TIO

N

Sta

tions

use

d in

the

reg

iona

l an

alys

es

A

Sta

tions

no

t us

ed i

n th

e re

gion

al a

naly

ses

Num

bers

are

ref

eren

ced

to t

able

s 1,

2.

and

5.

rab

Orc

hard

A.3

86.3

?

0 10

20

30

40

50

60

MIL

ES

I III

I I

I I

I20

40

60

80

10

0 K

ILO

ME

TE

RS

37

Fig

ure

1. S

tream

flow

data

-colle

ction sites

in Illin

ois

, In

dia

na,

and

Wis

consi

n.

42L

WISCONSI N

20 KILOMETERS

EXPLANATION

Stations used in the regional analyses

Stations not used in the regional analyses

Numbers are referenced to tables 1, 2, and 5.

215

Hickory Creek

Figure 2.--Streamflow data-collection sites in northeastern Illinois, northwestern Indiana, and southeastern Wisconsin.

18

Figure 3.--Distribution of rainfall intensity (24-hour 2-year) I, in inches, in Illinois (modified from Hershfield, 1961).

19

10 20 30 40 50 50 MILES I I I I I I

Figure 4. Geographic regions, R, in Illinois.

20

0.9

o

QZ

coZ LU

CJ

O oZo

LU DC

111 DC

0.8

0.7

0.6

0.5

0.4

10 15 20 25 30 40

RECURRENCE INTERVAL, IN YEARS

Figure 5. Regression constant and coefficients for estimatingb c equations, QT = a A S (I - 2.5) a Rf.

21

SelectQT to be

determined

yes

no

Gaging station best estimate of QT from table 1

Determine characteristics A, S, I, and Rf

for site

Compute QTusing

equations 1 to

Determine characteristics A, S, I, and Rf

for site

Obtain best estimateof QT for nearbygaging stationfrom table 1

Compute QTusing

equations 1 to 7

Computeweighted Qm using

equation 9

Final QT estimate

Figure 6.--Flow diagram for determining flood-peak discharge,

22

50,000

40,000

30,000

o oin COccHI Q_h- LU HI U_

O

CDD O

cc

XoCO

4,000

3,000300 400 600 800 1,000 2,000

DRAINAGE AREA, IN SQUARE MILES3,000 4,000

Figure 7.--Relation of flood-peak discharges for selected recurrence intervals to drainage area, Big Muddy River, since 1970.

23

40,000

30,000

Q 20,000

o oUJ CO

cc.LU D_I- LU LU LL

O

COD O

LU

O CO

10,0009,000

8,000

7,000

6,000

5,000

4,000

3,000

2,000400

100-year flood* i i i

50-year flood I I I _

25-year flood

10-year flood*

5-year flood p

2-year flood

600 800 1,000 2,000 DRAINAGE AREA, IN SQUARE MILES

3,000 4,000

Figure 8.--Relation of flood-peak discharges for selected recurrence intervals to drainage area, Fox River.

24

ouu,uuu

400,000

300,000

Q2 O OLLJ

£ 200,000LLJ Q.

LLJ LJJ U_

O

COID O2

m- 100,000

g 90,000

i 80,000o5 70 000

60,000

50,000

40,000

30,000 4,C

100-year f

V?

1CO«?:

i

CO CN=te*

ood *..

50-year flood25 y

10-y

5-y

2-y

ear f

Mear f

ear f

ear f

ood

ood

ood

ood

-

9

B

-

~ .

.

=

w>"o c

c 0

O)c

1 inO) CN

-L̂x^ xs^

9 ^s./ ̂./

/____

CO

'(/> O

T3

O

1

CO CO=te

\/-

/%

^

)00 6,000 8,000 10,000 20,000 40,0

DRAINAGE AREA, IN SQUARE MILES

Figure 9.--Relation of flood-peak discharges for selected recurrence intervals to drainage area, Illinois River.

25

Table

1. T-year pe

ak di

scha

rges

at ga

ging

stations

[T,

recurrence in

terv

al in years;

ftp,

di

scah

rge

in cubic

feet

pe

r second fo

r a

give

n re

curr

ence

interval of 2-,

5-,

10-, 25-, 50-, or 100-year fl

ood.

Th

e upper

numb

ers

are

valu

es of

Qj

> fr

om st

atio

n fr

eque

ncy

curv

es.

The

middle

numb

ers

are

values of

Q

computed using

regression eq

uati

ons.

Th

e lower

numb

ers

are

valu

es of the weighted or

best estimated fr

eque

ncy

curv

e and

were obtained by

weighting th

e st

atio

n an

d regression eq

uati

on cu

rves

.Stations noted

by an

asterisk (*)

have an

omal

ous

characteristics

and were omitted from the

regi

onal

anal

yses

. Dashes indicate th

at th

e fr

eque

ncy

value

is no

t co

mput

ed.]

Map

S

tati

on

No.

N

o.

1 03336100

2 03

33

65

00

3 03336900

4 *

03

33

70

00

5 0

33

37

50

0

6 03338000

7 03338100

8 03338500

9 03338800

Sta

tion

na

me

and lo

cati

on

Big

F

our

Dit

ch

tr

ibuta

ry

near

Paxto

n,

11

1.

Lat

40°2

7'1

5",

lo

ng

88-0

9'

10",

in

N

wV

fcN

Wl/i

se

c.

14

, T

.23

N

. ,

R.9

E

. ,

Ford

C

ou

nty

.

Blu

eg

rass

C

reek

at

Po

tom

ac,

ill.

L

at

40

°19

'19

",

long

87

«4

8t0

2",

in

SE

V4N

E1/

4 se

c. 34,

T.2

2

N.,

R.

13

W.

, V

erm

ilio

n C

ounty

.

Salt

F

ork

near

St.

Jo

seph,

11

1.

Lat

40°0

8'5

5",

lo

ng 88°0

2'0

0",

in

N

wV

lSE

l/4

sec.

35,

T.2

0

N.

, R

.10 E

.,

Cham

pai

gn

Co

un

ty.

Boney

ard

Cre

ek at

Urb

ana,

1

11

. L

at

40°0

6'4

0",

lo

ng

88°1

3'3

5",

in

NW

1/lN

El/

4 se

c.

18

, T

.19

N

. ,

R.9

E

. ,

Ch

amp

aig

n C

ounty

.

Sali

ne

Bra

nch

at

Urb

ana,

1

11

. L

at

40°0

7'1

2",

lo

ng

88°1

1'4

1",

in

N

EV

4SW

1/4

sec. 9

, T

.19

N

. ,

R.9

E

. ,

Cham

pai

gn

County

.

Salt

F

ork

near

Hom

er,

111.

Lat

40«03'2

0",

lo

ng

87«57'3

0",

in

SW

V4S

W1/

4 se

c. 33,

T.1

9

N.

, R

.14

W.

, C

ham

pai

gn

C

ounty

.

Salt

F

ork

tr

ibu

tary

n

ear

Catl

in,

111.

Lat

40°0

3I5

5",

lo

ng

8

7«

46

'05

",

in

SE1/l

NE

V4

sec.

36,

T.1

9

N.

, R

.I 3

W

. ,

Verm

ilio

n

Co

un

ty.

Verm

ilio

n

Riv

er

near

Catl

in,

11

1.

Lat

40°0

6'0

9",

lo

ng

87

«4

2'5

8",

in

SE

1/IS

EV

4

sec.

16,

T.1

9

N.

, R

. 12

W

. ,

Verm

ilio

n

Co

un

ty.

Nort

h

Fo

rk

Verm

ilio

n

Riv

er

trib

uta

ry

near

Dan

vil

le,

11

1.

Lat

40°1

4'2

3",

lo

ng

87°3

8f4

0",

in

N

EV

4NE

1/4

sec.

36,

T.2

1

N.

, R

.12

W.

, V

erm

ilio

n

Co

un

ty.

Q2 11

7 10

5 11

5

1,8

50

1,0

60

1,7

50

2,4

90

2

,74

0

2,5

20

46

9

1,2

80

1

,12

0

1,2

70

3,7

60

4,2

90

3

,79

0

195

177

193

8,4

70

9

,86

0

8,6

50

290

168

266

Qs 183

185

183

2,8

70

1,7

80

2,7

20

3,7

10

4,5

30

3,8

30

580

2,0

20

1,8

10

2,0

00

5,6

60

6,9

20

5

,75

0

37

6

30

9

36

6

14,5

00

15

,90

0

14,7

00

53

7

301

472

QIO 22

5

241

228

3,5

60

2,2

60

3,3

60

4,5

70

5,7

50

4

,76

0

64

7

2,5

00

2,2

60

2,4

80

6,8

90

8,6

70

7,0

50

501

401

48

3

19

,00

0

20,0

00

19

,20

0

74

0

39

5

63

2

22

5 275

312

281

4,4

50

2,8

80

4,1

70

5,7

10

7

,28

0

6,0

10

726

3,0

90

2,8

20

3,0

60

8,3

80

10,9

00

8,6

30

655

518

62

8

25,3

00

25

,00

0

25,2

00

1,0

40

519

859

QSO 31

0 36

6 32

0

5,1

10

3,3

30

4,7

80

6,6

20

8,4

10

6,9

80

780

3,5

10

3

,23

0

3,4

80

9,4

40

12,4

00

9,7

70

764

604

731

30,4

00

28

,70

0

30

,00

0

1,2

90

612

1,0

40

QIOO 34

3 4

18

3

56

5,7

50

3

,78

0

5,3

70

7,5

30

9,5

30

7,9

60

83

3

3,9

10

3,6

20

3,8

70

10,5

00

14

,00

0

10

,90

0

86

5

69

0

82

8

35,8

00

32,4

00

34,8

00

1,5

70

705

1,2

50

Table 1. T-year peak discharges at gaging stations Continued

Map

N

o.

10 11 12 13 14 15 16 17 18 19 20

Sta

tio

n

No.

03339000

03

34

17

00

03

34

19

00

033

43

40

0

03

34

40

00

03

34

42

50

03

34

44

25

03

34

45

00

03

34

55

00

03

34

60

00

03

37

80

00

Sta

tion

nam

e an

d lo

cati

on

Verm

ilio

n

Riv

er

near

Dan

vil

le,

111.

Lat

40

°06

'03

",

long

87»35

I52

",

in

NW

l/4N

Wl/4

se

c.

22,

T.1

9

N.

, R

. 11

W

., V

erm

ilio

n

Co

un

ty.

Big

C

reek

tr

ibu

tary

n

ear

Dudle

y,

11

1.

Lat

39033'5

5M

, lo

ng

87»47

I25",

in

SW

1/4N

W1/

4 se

c.

19,

T.1

3

N.

, R

.I 2

W

., E

dgar

C

ounty

.

Rac

coon

Cre

ek tr

ibu

tary

n

ear

Annapoli

s,

111.

Lat

3900

8'3

6",

lon

g 87»41'1

0",

in

N

E1/

4NE

1/4

sec.

13,

T.8

N

. ,

R.1

2

W.,

C

raw

ford

C

ou

nty

.

Bm

bar

ras

Riv

er

near

Cam

argo,

ill.

L

at

39°4

7'3

0",

lo

ng

88°1

1'1

0",

in

N

El/f

cNW

l/l

sec. 3

, T

.15

N

. ,

R.9

E

. ,

Dougla

s C

ounty

.

Em

bar

ras

Riv

er

near

Dio

na,

111.

Lat

39

°20

'40

",

long

88°1

0'1

5",

in

N

E1/4

NW

V4

sec. 2

, T

.10

N.

, R

.9 E

.,

Cu

mb

erla

nd

C

ounty

.

Em

bar

ras

Riv

er

trib

uta

ry

near

Gre

enu

p,

11

1.

Lat

390

14

*0

0",

lo

ng

88°0

9'2

0",

in

N

W1/

4SW

V4

sec.

12,

T.9

N

.,

R.9

E

. ,

Cu

mb

erla

nd

C

ounty

.

Mud

dy

Cre

ek tr

ibu

rary

at

Woodbury

, 111.

Lat

39»11'5

8",

lo

ng

88°

17

' 38

",

in

NE1

/4N

W1/

4 sec. 27,

T.9

N

. ,

R.8

E

. ,

Cum

ber

land

Co

un

ty.

Ran

ge

Cre

ek

near

Cas

ey,

11

1.

Lat

39°

19 '3

6",

lon

g 8

8°0

1'4

6",

in

N

El/

fcS

El/

4 sec.

12,

T.1

0

N.

, R

. 10

E

.,

Cum

ber

land

County

.

Em

bar

ras

Riv

er

at

Ste

. M

arie

, 111.

Lat

38°5

6'1

0",

long

88

°01

'10

",

in

NW

l/^N

Wl/4

se

c.

30,

T.6

N

. ,

R.

14

W.

, Ja

sper

County

.

Nort

h

Fork

E

mbar

ras

Riv

er

near

Oblo

ng,

111.

Lat

39

°00

>37",

lo

ng

87«56'4

7",

in

N

W1/

4NW

1/4

sec.

35,

T.7

N

. ,

R.

14

W.

, C

raw

ford

C

ounty

.

Bo

np

as

Cre

ek at

Bro

wns,

111.

Lat

38°2

3'1

1",

lo

ng

87

°58

'32

",

in

NW

1/4S

EV

4 sec. 33,

T.I

S

.,

R.1

4

W.,

Wab

ash

County

.

22

13

,60

0

12

,70

0

13

,60

0

182

188

183 18

17

18

3,1

60

2,9

90

3,1

30

8,9

90

7,6

70

8,8

30 23

13

22 24

35

26

90

2

592

867

14

,00

0

12

,90

0

13

,90

0

7,3

60

6,0

70

7,2

80

2,9

10

4,1

80

2,9

80

QS

21,0

00

20,4

00

21,0

00

29

2

34

2

307 32

31

32

4,6

50

4,8

80

4,6

70

13,6

00

12,2

00

13

,40

0 38

24

35 49

67

54

1,6

30

1

,04

0

1,5

30

23,4

00

20,5

00

23,2

00

12,9

00

10,1

00

12

,70

0

4,0

30

6,8

90

4,2

40

QIO

26

,00

0

25,6

00

25

,90

0

37

6

45

4

401 41

4

2

41

5,5

20

6,1

40

5,5

80

16,8

00

15,1

00

16,5

00 49

31

45 72

90

77

2,2

20

1,3

60

2,0

50

30,3

00

25,6

00

30,0

00

16,9

00

12,8

00

16,6

00

4,7

60

8,7

30

5,1

10

Q2

5

32,2

00

32,1

00

32,2

00

49

2

601

531 53

56

54

6,4

90

7,7

10

6,6

50

21,0

00

18

,80

0

20,5

00 63

40

58 10

7 12

2 11

2

3,0

90

1,7

70

2,7

90

39,4

00

31,9

00

38,9

00

22,2

00

16

,30

0

21,5

00

5,7

00

11,0

00

6,2

20

Qso

36,8

00

36

,90

0

36

,80

0

587

714

634 62

67

63

7,1

30

8,8

70

7,3

60

24,2

00

21,4

00

23,5

00 75

46

68 13

7 14

6 14

0

3,8

30

2,0

80

3,4

00

46,7

00

36

,60

0

45,8

00

26

,10

0

18,9

00

25

,20

0

6,4

10

1

2,8

00

7

,06

0

2100

41,4

00

41,6

00

41,4

00

68

9

82

8

740 71

77

72

7,6

90

10,0

00

8,0

20

27

,40

0

24

,00

0

26,5

00 87

53

78 17

2 17

1 17

2

4,6

30

2,4

00

4,0

70

54,1

00

41,0

00

53

,00

0

30,1

00

21,5

00

28,9

00

7,1

30

14,5

00

7,8

90

Table 1. T-year peak discharges at gaging stations Continued

to

00

Map

N

o. 21 22 23 24 25

26 27 28 29 30 31

Sta

tion

No.

03378635

03

37

86

50

03378900

03

37

89

80

03

37

95

00

03

37

96

50

03

38

03

00

03

38

03

50

03

38

04

00

03380450

03380475

Sta

tion

na

me

and

locati

on

Lit

tle

Wab

ash

Riv

er

near

Eff

ing

ham

, 111.

Lat

39°0

6'1

3",

lo

ng

88

°35

'33

",

in

NW

I/jN

Wl/4

se

c. 36,

T-8

N

.,

R.5

E

.,

Eff

ing

ham

C

ounty

.

Sec

on

d

Cre

ek tr

ibuta

ry at

Kep

tow

n,

11

1.

Lat

39°0

4'5

0",

lo

ng

88°3

9'5

5",

in

N

El/

jSW

l/j

sec.

5,

T.7

N

.,

R.5

E

. ,

Eff

ing

ham

C

ou

nty

.

Lit

tle

Wab

ash

Riv

er

at

Louis

vil

le,

11

1.

Lat

38°4

6'2

3",

lo

ng

88°2

9'5

0",

in

N

W1/

4SE

1/4

sec.

23,

T.4

N

.,

R.6

E

.,

Cla

y

County

.

Lit

tle

Wab

ash

Riv

er

trib

uta

ry at

Cla

y C

ity,

111.

Lat

38°4

0'4

6",

long 8

8°2

0'5

3",

in

N

Wl/4

sw1/

4 se

c.

20,

T.3

N

. ,

R.8

E

.,

Cla

y

Co

un

ty.

Lit

tle

Wab

ash

Riv

er

bel

ow

C

lay

C

ity

, 1

11

.L

at

38°3

8'0

5",

lo

ng

88°1

7'5

0",

in

N

E1/

4SE

1/4

sec.

3,

T.2

N

.,

R.8

E

. ,

Cla

y

County

.

Mad

den

Cre

ek

near

Wes

t S

alem

, 1

11

.L

at

38e

32I15",

lo

ng

88

°03

'25

",

in

SW

l/4N

Wl/4

se

c.

12,

T.1

N

.,

R.1

0

E.,

E

dw

ards

County

. ~~

~

Dum

s C

reek

tr

ibuta

ry

near

luk

a,

11

1.

Lat

38°3

7'3

5",

lo

ng

88

049

'20

",

in

NE

1/4S

W1/

4 se

c.

12

,T

.2

N.

, R

.3

E.,

M

ario

n

Co

un

ty.

Sk

ille

t F

ork

near

luk

a,

111.

Lat

38°3

1'1

0",

lo

ng

8804

3'3

9",

in

SE1/

4SW

1/4

sec.

14

,T

.1

N.,

R.4

E

.,

Mar

ion

County

.

Ho

rse

Cre

ek tr

ibuta

ry

near

Cart

ter,

111.

Lat

38

°3T

10

",

lon

g 88°5

1'5

0",

in

SW

1/4S

W1/

4 se

c.

15

,T

.1

N.

, R

.3

E.

, M

ario

n

Co

un

ty.

Wh

ite

Feath

er

Cre

ek

near

Mar

low

, 1

11

.L

at

38°2

0'4

0",

lo

ng

88°4

6'5

0",

in

N

WI/

jNE

l/j

sec. 20,

T.2

S

.,

R.4

E

.,

Jeff

ers

on

County

.

Ho

rse

Cre

ek

near

Kee

nes

, 111.

Lat

38°2

2'3

4",

lo

ng

88°3

914

4",

in

N

W1/

4SW

1/4

sec. 4,

T.2

S

. ,

R.5

E

. ,

Way

ne

County

.

Q2 5,4

10

5,3

80

5,4

00

230

212

22

6

11

,50

01

0,3

00

11,3

00

131

129

131

13,0

00

12,5

00

12,9

00

413

284

38

8 42 46 43

5,0

00

3,8

50

4,8

10

222

232

22

5

135

166

140

3,7

20

2,7

40

3,6

00

Q5 7,3

30

8,9

90

7,6

20

386

38

038

5

17

,40

016,9

00

17,3

00

242

240

242

22,8

00

20,3

00

22,6

00

66

452

062

5 66 89 70

9,0

20

6,3

40

8,4

70

366

427

385

206

316

224

5,5

20

4,6

10

5,3

70

QIO

8,5

30

11,5

00

9,1

00

50

55

00

50

4

21,3

00

21

,30

02

1,3

00

321

32

43

22

30

,30

02

5,5

00

29

,90

0

85

56

92

80

5 82 122 90

12,0

00

8,0

20

11

,10

0

47

25

69

50

6

25

24

28

282

6,7

10

5,9

00

6,5

60

Q2

5

10

,00

014,7

00

11

,00

0

671

65

86

67

26,2

00

27,0

00

26,4

00

42

54

35

427

40

,70

032,

100

40,0

00

1,1

30

92

01

,06

0

104

165

116

16

,00

01

0,1

00

14

,40

0

61

57

59

66

8

31

058

135

7

8,2

20

7,5

30

8,0

90

Qso

11,0

00

17,1

00

12,4

00

80

77

76

79

6

29,6

00

31,2

00

30,0

00

502

521

506

49,1

00

36

,90

048,0

00

1,3

50

1,1

00

1,2

60

119

200

135

19,1

00

11,7

00

17,0

00

729

90

679

6

352

700

413

9,3

50

8,7

70

9,2

30

QIOO

12

,10

01

9,5

00

13,7

00

951

89

593

1

33

,10

035,3

00

33,6

00

578

60

85

86

57,8

00

41,7

00

56,2

00

1,5

80

1,2

70

1,4

80

136

235

155

22

,30

013,3

00

19,6

00

84

71

,05

09

27

39

48

24

46

9

10

,50

09,9

80

10,4

00

Tab

le

1.

T-y

ear

peak dis

charg

es

at

gagin

g sta

tions C

onti

nued

to

v£>

Map

N

o.

32

33 34

35

36

37

38

39

40

41

42

Sta

tion

No.

03

38

05

00

03

38

15

00

033

81

60

0

033

82

02

5

03

38

21

00

03

38

21

70

*03382500

03382510

03

38

25

20

03

38

44

50

03

38

50

00

Sta

tion

nam

e an

d lo

cati

on

Sk

ille

t F

ork

at

Way

ne C

ity

, 111.

Lat

3802

1'2

5",

lon

g

88°3

5'0

0",

in

S

Wl/

jSW

l/j

sec.

7,

T.2

S

.,

R.6

E

.,

Way

ne

County

.

Lit

tle

Wab

ash

Riv

er

at

Car

mi,

111.

Lat

38°0

3'4

0",

lo

ng

88°0

9'3

5",

in

N

W1/

4SE

1/4

sec. 2

5,

T.5

S

.,

R.9

E

.,

Whit

e C

ou

nty

.

Lit

tle

Wab

ash

Riv

er

trib

uta

ry

near

New

H

aven

, 1

11

.L

at

37°5

5'5

0",

lo

ng 8

8°0

9'5

5",

in

H

E 1/

4 SW

1/4

se

c.

12,

T.7

S

.,

R.9

E

.,

Wh

ite

Co

un

ty.

Lit

tle S

ali

ne

Cre

ek tr

ibuta

ry

near

Go

rev

ille

, 111.

Lat

37

«3

6'2

8M

, lo

ng

88

°58

'44

",

in

SW1/

4NW

1/4

sec. 34,

T.1

0 S

.,

R. 2

E

.,

Wil

liam

son

County

.

South

F

ork

S

ali

ne

Riv

er

near

Carr

ier

Mil

ls,

111.

Lat

37°3

8'1

6",

lo

ng

88°4

0'4

0",

in

SW1/

4NE

1/4

sec.

20

,T

.10

S

. ,

R. 5

E

.,

Sali

ne

County

.

Bru

shy

C

reek

near

Harc

o,

111.

Lat

37

°46

'30

",

lon

g

88

«3

9'0

8",

in

N

W1/

4NW

1/4

sec. 3

,T

.9 S

.,

R.5

E

.,

Sali

ne

Co

un

ty.

Sali

ne

Riv

er

near

Juncti

on,

11

1.

Lat

37«4

1I5

2",

lo

ng 8

8°1

6'0

0",

in

N

E1/

4 sec. 36,

T.9

S

.,

R.8

E

. ,

Gall

ati

n C

ounty

.

Eag

le

Cre

ek near

Equali

ty,

11

1.

Lat

37

°39

I03",

lo

ng

8

8°2

3'2

8",

in

N

E1/

4SE

1/4

sec.

14,

T.1

0

S.,

R.7

E

. ,

Sali

ne C

ounty

.

Bla

ck

Bra

nch

tr

ibu

tary

near

Juncti

on,

111.

Lat

37»4

1 '1

3",

lon

g

88°

16' 5

5",

in

N

El/

4 sec. 2,

T.1

0

S.

, R

.8 E

.,

Gall

ati

n

Co

un

ty.

Lusk

C

reek

near

Eddyvil

le,

111.

Lat

3702

8'2

0",

lon

g 8

8°3

2'5

0",

in

N

Wl/4

SE

l/4

sec.

16,

T.1

2

S.,

R.6

E

. ,

Pope

County

.

Hay

es

Cre

ek at

Gle

ndale

, 111.

Lat

37°2

7'2

5H

, lo

ng

88°4

0'0

5",

in

SW

1/4S

W1/

4 sec. 2

1,

T.1

2

S.,

R.5

E

.,

Po

pe

Co

un

ty.

Q2

8,2

60

6,5

30

8,1

80

14,5

00

21,3

00

14,8

00 89 71 85

273

179

254

2,8

70

3,8

80

2,9

90

1,1

30

89

51,0

80

10,9

00

525

89

958

5

156

187

163

5,6

10

2,7

90

4,9

90

2,2

40

1,6

80

2,1

80

25

14

,30

01

0,6

00

14,0

00

21,7

00

33,8

00

22,5

00

157

135

150

356

310

345

3,9

00

5,9

80

4,2

00

1,5

50

1,4

40

1,5

20

17,3

00

60

01

,48

073

1

305

313

30

8

8,5

30

4,5

20

7,2

90

3,7

20

2,7

60

3,5

70

2lO

18,7

00

13,4

00

18,3

00

26,9

00

42,1

00

28,1

00

211

182

201

40

84

05

40

7

4,5

50

7,3

80

5,0

00

1,8

40

1,8

10

1,8

30

22,2

00

63

81

,88

08

28

431

39

94

20

10

,70

05,7

10

8,9

50

4,8

60

3,5

10

4,6

10

22

5

24,9

00

16,9

00

24,2

00

33,8

00

52,2

00

35,6

00

289

247

27

4

471

52

84

86

5,3

10

9,1

20

5,9

80

2,2

10

2,2

70

2,2

30

28,9

00

67

92

,40

09

44

61

551

157

5

13

,50

07

,24

01

1,2

00

6,4

70

4,4

80

6,0

50

25

0

29,7

00

19

,50

028,7

00

39,2

00

59,8

00

41,4

00

353

297

333

516

62

454

5

5,8

60

10,4

00

6,6

80

2,5

00

2,6

20

2,5

40

34,2

00

705

2,8

00

1,0

20

773

593

701

15,8

00

8,4

10

12,9

00

7,7

80

5,2

00

7,2

30

QIOO

34,7

00

22,0

00

33,3

00

44,8

00

67

,10

047,3

00

42

33

49

39

5

561

71

960

1

6,3

80

11

,60

07,3

60

2,7

90

2,9

60

2,8

50

39,9

00

_

728

3,1

90

1,0

90

94

66

76

83

6

18

,20

09,5

50

14

,80

0

9,2

00

5,9

30

8,4

70

Table 1. T-year peak discharges at gaging stations Continued

U)

O

Map

N

o. 43 44

45

46

47

48

49 50 51 52 53

Sta

tion

No.

03

38

55

00

*0

33

86

50

0

03

61

20

00

03

61

22

00

03614000

04

08

73

00

04087400

054

14

82

0

05

41

50

00

054

15

50

0

054

18

75

0

Sta

tion

nam

e an

d lo

cati

on

Lak

e G

len

dale

In

let

near

Dix

on

S

pri

ngs,

111.

Lat

37°2

4'5

5",

lo

ng

88°3

9'0

0",

in

N

El/

jSW

l/j

sec.

3,

T.1

3 S

.,

R.5

E

.,

Pope

C

ounty

.

Sugar

Cre

ek

near

Dix

on

Sp

rin

gs,

1

11

.L

at

37

°24

'56

",

long

88°4

0'2

5",

in

N

WI/

jSW

l/j

sec. 4

,T

.13

S

.,

R.5

E

.,

Pop

e C

ounty

.

Cac

he

Riv

er

at

Form

an,

11

1.

Lat

37

°20

'11

",

long 88°5

5'2

6",

in

N

E1/4

NW

1/1

sec. 6

,T

.14

S

.,

R.3

E

.,

Johnso

n

Co

un

ty.

Q d

itch

tr

ibuta

ry

near

Choat,

1

11

.L

at

37013' 10",

lo

ng

88

°48

'00

",

in

NW

1/4N

W1/

4 sec.

17,

T.1

5

S.

, R

.4

E.

, M

assa

c C

ounty

.

Hes

s B

ayou

tr

ibuta

ry

near

Mou

nd C

ity

, 1

11

.L

at

37°0

8'1

1",

lo

ng

89

°08

'31

",

in

NE

1/4S

E1/

4 se

c. 7

,T

.16

S

.,

R.

1 E

.,

Pula

ski

Co

un

ty.

Lak

e M

ich

igan

tr

ibuta

ry at

Win

thro

p

Harb

or,

111.

Lat

42°2

9110",

lo

ng

87

°49

'20

",

in

SW

l/js

Wl/

j se

c.

3,

T.4

6

N.

, R

.12

E.

, L

ake

County

.

Kell

ogg

Rav

ine

at

Zio

n,

111.

Lat

42

°28

'02

",

long

87°4

9'2

9",

in

SW

1/4N

W1/

4 se

c.

15,

T.4

6

N.

, R

.12

E.

, L

ake

Co

un

ty.

Sin

sin

aw

a

Riv

er

near

Men

ora

inee

, 111.

Lat

42°2

8'4

4",

lo

ng

90°2

9'1

0",

in

S

El/

jSE

l/j

sec. 28,

T.2

9

N.

, R

. 1

W.,

Jo

Davie

ss

Co

un

ty.

Gale

na

Riv

er

at

Bun

com

be,

Wis

.L

at

42

°30

'49

",

lon

g

90

°22

'40

",

in

SW1/

4 se

c.

33

,T

.1

N.,

R.

1 E

. ,

Lafa

yett

e

Co

un

ty.

East

F

ork

G

alen

a R

iver

at

Council

H

ill,

1

11

.L

at

42°2

8'0

5",

lo

ng

9002

0'2

0",

in

SW1/

4NW

1/J

sec.

31,

T.2

9

N.

, R

.2

E.

, Jo

D

avie

ss

Co

un

ty.

South

F

ork

A

pple

R

iver

near

Nora

, 1

11

.L

at

42°2

5'3

5",

lo

ng

89°5

7I5

0",

in

N

W1/

4NW

1/4

sec.

17

,T

.28

N

. ,

R.5

E

. ,

Jo

Davie

ss

Co

un

ty.

Q2 58

24

27

553

1,4

40

3,8

20

4,6

30

3,8

50

137

144

138

45

431

24

18 80 102 83

233

134

21

6

2,9

90

1,9

00

2,7

70

4,7

30

3,6

70

4,6

60

1,9

80

1,5

40

1,9

20

208

235

213

25 93

57

55

89

9

1,8

90

6,2

50

7,0

50

6,3

00

225

256

233

597

52

057

3

147

176

153

40

92

19

361

5,7

00

3,2

80

5,0

10

7,7

10

6,2

20

7,5

00

4,1

70

2,7

30

3,8

80

362

421

372

QIO

1,1

70

99

51,1

40

2,2

00

7,9

40

8,5

90

7,9

80

292

337

304

690

66

568

1

202

227

208

552

275

467

8,0

00

4,2

70

6,7

50

10

,20

08,0

00

9,7

70

6,1

80

3,5

90

5,5

60

46

955

348

5

22

5

1,4

70

1,3

20

1,4

40

2,6

00

10

,10

01

0,5

00

10

,10

0

38

54

46

40

2

80

485

18

20

284

290

28

6

76

234

361

1

11

,50

05,5

30

9,2

30

13

,80

01

0,3

00

13

,10

0

9,4

40

4,7

30

8,1

30

60

47

26

63

0

QSO

1,6

90

1,5

70

1,6

70

2,9

10

11

,70

01

1,9

00

11,7

00

459

531

480

887

991

925

356

337

350

940

391

726

14,5

00

6,5

00

11,3

00

17,0

00

12,0

00

15

,90

0

12,4

00

5,6

00

10,4

00

701

857

736

QIOO

1,9

10

1,8

30

1,8

90

3,2

20

13

,40

01

3,3

00

13,4

00

538

617

560

96

81,1

30

1,0

30

437

383

419

1,1

40

437

84

9

17,8

00

7,4

50

13

,50

0

20

,70

013,7

00

19,1

00

16,0

00

6,4

70

13,0

00

798

98

98

39

Table 1. T-year peak discharges at

gaging stations Continued

Map

No. 54 55

56

57

58

59

60 61 62 63

64

Station

No.

05418800

05419000

05420000

05430500

05431500

05434500

05435000

05435500

05435650

05436500

05436900

Station na

me and location

Mill Creek tributary near Scales Mound, 111.

Lat 42°27

110", long 90°15'10", near center of

sec.

2,

T.28 N.,

R.2

E. ,

Jo Daviess County.

Apple River near Ha

nove

r, 111.

Lat 42

015'05",

long gO-MT'lO", in NE

1/4N

W1/4

sec. 16,

T.26 N.

, R.

2 E. ,

Jo Daviess County.

Plum River below Carroll Creek near Savanna, 111.

Lat 42°06'50", long 90°05'35n

, in

NW1/4SW1/4 se

c. 31,

T.25 N.

, R.4

E. ,

Carroll County.

Rock River at

Afton,

Wis.

Lat 42°36'33", long 89

004*14",

in NE1/4

sec.

28,

T.2 N.

, R. 12

E.,

Rock

County.

Turtle Creek near Cl

into

n, Wis.

Lat 42°35

147"

, long 88

-51 '50",

in SE

1/4

sec.

29,

T.2 N.

, R.

14

E. ,

Rock Co

unty

.

Pecatonica River at Martintown, Wi

s.

Lat 42030

'34"

, long 89°47'58", in SE

1/4

sec. 32,

T.1

N. ,

R. 6 E.,

Green County.

Cedar Creek near Winslow, 111.

Lat 42°28'00", long 89°50'02", in SE

1/4N

E1/4

se

c. 32,

T.29N., R.6E., Stephenson County.

Pecatonica River at

Freeport, 111.

Lat 42°18'13", long 89°36'57", in SE1/4

sec.

30,

T.27 N.

, R.8

E. ,

Stephenson Co

unty

.

Lost Creek tributary ne

ar sh

anno

n, 111.

Lat 42° 10' 10", long 89°44'45", in SE

1/4S

E1/4

sec. 12,

T.25 N.

, R.6

E.,

Carroll County.

Sugar River near Brodhead, Wis.

Lat 42°36'42", long 89°23

153"

, in

SW1/4

sec.

26,

T.2 N.

, R.9

E. ,

Ro

ck Co

unty

.

Otter Creek tributary ne

ar Durand, 111.

Lat 42°28'10", long 89°19'25", in SE1/4NE1/4 sec. 34,

T.29 N.

, R. 10

E.,

Winnebago County.

Q2 25

5 255

255

5,260

6,180

5,310

3,530

4,570

3,610

6,410

9,380

6,490

2,070

1,90

0 2,060

5,700

7,740

5,790

105

186

114

5,730

9,290

5,820

285

217

270

3,520

5,310

3,580 51

122 60

Qs 434

482

445

7,780

10,4

00

7,980

5,930

7,590

6,100

8,970

14,000

9,120

4,110

3,000

4,020

9,080

12,2

00

9,290

293

335

299

9,250

14,6

00

9,460

402

386

398

6,440

8,510

6,530 97

225

119

QIO 564

652

585

9,530

13,400

9,860

7,710

9,660

7,930

10,500

16,900

10,800

5,780

3,710

5,560

11,500

15,200

11,800

478

442

471

11,900

18,100

12,200

478

506

485

8,670

10,600

8,770

136

300

168

Q25

736

881

773

11,700

17,2

00

12,3

00

10,1

00

12,3

00

10,400

12,4

00

20,400

12,7

00

8,180

4,570

7,710

14,7

00

18,700

15,100

773

582

731

15,4

00

22,400

15,8

00 571

662

597

11,8

00

13,200

11,900

193

400

238

Qso 869

1,060

916

13,5

00

20,100

14,1

00

12,0

00

14,200

12,300

13,6

00

22,800

14,1

00

10,2

00

5,190

9,420

17,200

21,400

17,600

1,040

689

953

18,2

00

25,500

18,7

00 638

780

681

14,2

00

15,1

00

14,300 243

476

296

2lOO

1,00

0 1,

240

1,06

0

15,1

00

23,000

16,0

00

13,900

16,1

00

14,3

00

14,9

00

24,900

15,3

00

12,3

00

5,770

11,200

19,700

23,900

20,200

1,33

0 794

1,190

21,200

28,500

21,800

705

897

762

16,8

00

17,0

00

16,8

00 296

553

358

Tabl

e 1. T-year pe

ak di

scha

rges

at

gaging stations Continued

U>

to

Map

N

o. 65

66

67

68

69

70

71 72

73

74

75

Sta

tio

n

No.

05

43

70

00

05

43

75

00

05

43

76

00

05

43

79

50

05438250

05438300

05

43

83

90

05

43

85

00

05

43

88

50

05439000

05

43

95

00

Sta

tion

nam

e an

d lo

cati

on

Pecato

nic

a

Riv

er

at

Shir

lan

d,

111.

Lat

42°2

6'1

0H

, lo

ng

8

9°1

1'5

0",

in

SW

1/4

sec.

11,

T.2

8

N.,

R

.11

E

.,

Win

neb

ago

Co

un

ty.

Roc

k R

iver

at

Ro

ckto

n,

11

1.

Lat

42

°26

'55

",

lon

g

8900

4'1

1",

in

SW1/

4NE

1/4

sec. 24,

T.4

6 N

.,

R.

1 E

.,

Win

neb

ago

Co

un

ty.

Roc

k R

iver

trib

uta

ry

near

Rock

ton,

111.

Lat

42°2

3'0

0",

lon

g 89°0

5'5

0",

in

S

E1/

4SE

1/4

sec.

10,

T.4

5

N.

, R

. 1

E.,

W

inneb

ago

Co

un

ty.

Kis

hw

auk

ee

Riv

er

near

Hu

nt l

ey

, 111.

Lat

42

°13

'47

",

long

88C2

5'2

1",

in

SE1/

4SW

1/4

sec. 4

, T

.43

N

. ,

R.7

E

. ,

McH

enry

C

ounty

.

Coo

n C

reek

at

Ril

ey,

11

1.

Lat

42

°10

'58

",

long 88°3

8'2

8",

in

SE

1/4S

W1/

4 se

c.

22

, T

.43

N.

, R

.5

E.

, M

cHen

ry

Co

un

ty.

Law

ren

ce

Cre

ek tr

ibuta

ry

near

Harv

ard

, 1

11

. L

at

42°2

7I3

0",

lo

ng 88°3

6'1

0",

in

S

El/

jSW

l/i

sec.

13,

T.4

6

N.

, R

.5

E.,

M

cHen

ry

County

.

Pis

casa

w

Cre

ek

bel

ow

M

okel

er

Cre

ek

near

Cap

ron,

111.

Lat

42

°23

'08

",

long

88

°41

'49

",

in

NE1

/4N

W1/

4 se

c.

18

, T

.45

N.,

R

.5

E.

, M

cHen

ry

County

.

Kis

hw

aukee

R

iver

at

Belv

idere

, 1

11

. L

at

42°1

5'2

2",

lon

g 88°5

1'5

0",

in

S

E1/

4SE

1/4

sec.

27,

T.4

4

N.,

R.3

E

.,

Boo

ne

County

.

Mid

dle

B

ranch

of

So

uth

B

ranch

K

ish

wau

kee

R

iver

near

Malt

a,

11

1.

Lat

41

°51

120

",

long 88°5

3'1

0",

in

N

E1/

4SE

1/4

sec.

16

, T

.39

N.

, R

.3

E.

, D

e K

alb

C

ounty

.

South

B

ranch

K

ishw

auk

ee

Riv

er

at

De

Kalb

, 111.

Lat

41°5

5>5

3",

lo

ng

88°4

5'3

5",

in

S

Wl/4

NE

l/4

sec. 2

2,

T.4

0

N.

, R

.4

E.

, D

e K

alb

C

ounty

.

South

B

ranch

K

ishw

aukee

R

iver

near

Fair

dale

, 1

11

. L

at

42°0

6'4

0",

lo

ng

88°5

4'0

0",

in

SW

1/4S

W1/

4 se

c.

16

, T

.42

N.,

R.3

E

.,

De

Kal

b

County

.

Q2

8,4

10

10

,20

0

8,5

10

14,7

00

12,6

00

14

,60

0

146

197

154

128

292

146

1,2

60

1,3

80

1,2

70 78

13

3 85

1,7

90

1,6

90

1,7

70

3,7

20

5

,33

0

3,7

80

146

163

148

794

1,0

80

83

4

3,9

30

2,9

30

3,8

70

25

12

,30

0

15,6

00

12

,50

0

21,2

00

18

,60

0

21,0

00

25

9

347

274

158

47

3

193

2,2

60

2,2

40

2,2

60

130

24

2

148

2,5

40

2,7

90

2,6

10

6,5

30

8,5

30

6,6

50

232

288

241

1,3

20

1,7

30

1,4

10

6,0

70

4

,59

0

5,9

80

QIO

14

,80

0

19

,10

0

15

,10

0

25,2

00

22,2

00

25,1

00

337

452

35

9

175

592

224

2,9

40

2,8

20

2,9

20

167

31

9

195

3,0

30

3,5

20

3,1

90

8,5

70

1

0,7

00

8,7

30

292

37

6

30

5

1,7

30

2,1

60

1,8

50

7,3

50

5,6

60

7,2

30

Q25

17,7

00

23

,20

0

18

,30

0

30,2

00

26,5

00

29

,90

0

43

3

58

7

46

6

193

73

5

26

3

3,7

80

3,5

20

3

,74

0

21

6

42

2

25

6

3,6

60

4,4

40

3,9

40

11,3

00

13,3

00

11,5

00

36

6

48

8

38

8

2,3

30

2,6

70

2,4

40

8,7

90

6,9

50

8,6

50

Qso

19

,90

0

26,1

00

20,5

00

33,7

00

29,4

00

33,3

00

502

68

9

543

20

5

83

8

290

4,3

90

4,0

40

4,3

30

254

49

9

303

4,1

40

5,1

10

4,5

10

13

,40

0

15

,20

0

13

,60

0

422

573

45

0

2,8

40

3,0

50

2,9

10

9,7

30

7,8

70

9,5

70

QIOO

21,9

00

28

,80

0

22,6

00

37,0

00

32,2

00

36,6

00

56

8

78

9

61

9

21

5

93

5

31

4

4,9

50

4,5

30

4,8

80

292

57

7

35

0

4,6

10

5,7

50

5

,06

0

15,5

00

17

,00

0

15

,60

0

47

6

65

6

511

3,4

00

3,4

00

3,4

00

10,6

00

8,7

50

10

,40

0

Table 1. T-year peak discharges at gaging stations Continued

U)

U)

Map

No. 76 77 78 79

80

81 82

83 84

85

86

Station

No.

05439550

05440000

05440500

05440650

05440900

05441000

05441500

05442000

05443500

05444000

05444100

Station name an

d location

South Branch Kishwaukee River tributary near

Irene, 111.

Lat 42°10'38

n,

long 88°56'50", in

SW

1/4N

E1/4

sec. 25,

T.43 N. ,

R.2

E. ,

Winnebago Co

unty

.

Kishwaukee River near Perryville, 111.

Lat 42°11'45", long 88°59'55", in

NE1/4NE1/4 sec. 21,

T.43 N. ,

R.2

E.,

Winnebago County.

Killbuck Creek near Monroe Center,

111.

Lat 42°05'55", long 89°03'10", in NW

1/4S

W1/4

sec. 19,

T.42 N.

, R.2

E.,

Ogle Co

unty

.

Stillman Creek tributary near Ho

lcom

b, 111.

Lat 42°03'48

n,

long 89°08

I36M

, in

NE

1/4N

W1/4

sec. 5,

T.41 N. ,

R. 1

E. ,

Ogle County.

Leaf River tributary near Forreston, 111.

Lat 42°07

I40",

long 89°31'20", in

NE

1/4N

W1/4

se

c. 36,

T.25 N.

, R.

8 E.

, Ogle Co

unty

.

Leaf River at

Leaf Ri

ver,

111.

Lat 42

007

'40"

, long 89°23'25", in

NW1/4

sec. 31,

T.25 N.

, R.10 E.,

Ogle County.

Rock River at Oregon,

111.

Lat 42°01'00", long 89°19'44

n, in

SE1/4NW1/4 sec. 3,

T.23 N. ,

R.10 E.,

Ogle County.

Kyte River near Flagg Ce

nter

, 111.

Lat 41°56'15", lo

ng 89°09'22", in

NW

1/JS

E1/4

se

c. 18,

T.40 N.

, R.1

E. ,

Ogle Co

unty

.

Rock River at

Como,

111.

Lat 41°47

I00"

, long 89°44'58", in NE

1/4N

E1/4

sec. 25,

T.21 N.

, R.6 E.,

Whiteside County.

Elkhorn Creek near Penrose, 111.

Lat 41

054'10",

long 89°41'40

n,

in SW1/4SE1/4 se

c. 9,

T.22 N.

, R.7

E.,

Whiteside Co

unty

.

Spring Creek tributary near Coleta,

111.

Lat 41°50'40", long 89°47

t39"

, in SE1/4SW1/4 se

c. 34,

T.22 N.

, R.6

E.,

Whiteside County.

Q2

81

185 93

7,190

8,850

7,280

2,420

2,270

2,400 81

117 86 55

62

56

2,810

2,610

2,790

21,500

21,500

21,500

1,260

2,040

1,370

24,700

23,200

24,600

3,050

2,600

3,020

274

239

265

Qs 191

329

213

11,9

00

14,1

00

12,100

4,320

3,740

4,270

143

207

155

104

116

106

5,210

4,370

5,140

33,000

32,400

32,800

1,740

3,340

2,050

35,600

34,900

35,600

4,540

4,270

4,520

481

436

468

QIO 289

432

317

15,100

17,500

15,200

5,560

4,730

5,480

191

271

208

145

157

148

6,950

5,580

6,820

40,900

39,200

40,500

2,050

4,220

2,520

42,200

42,400

42,200

5,450

5,380

5,450

630

578

614

Q25 441

564

469

18,900

21,800

19,100

7,030

5,970

6,920

256

353

280

207

213

208

9,200

7,130

8,970

51,400

47,300

50,100

2,440

5,300

3,130

49,500

51,300

49,500

6,500

6,790

6,520

822

767

805

Qso 57

0 66

2 593

21,6

00

24,9

00

21,9

00

8,04

0 6,890

7,910

309

415

336

262

255

260

10,9

00

8,260

10,6

00

59,3

00

53,1

00

57,300

2,73

0 6,100

3,580

54,3

00

57,5

00

54,6

00

7,21

0 7,820

7,260

968

912

951

QIOO 71

4 762

726

24,200

27,900

24,500

8,950

7,780

8,830

363

476

393

324

299

316

12,5

00

9,400

12,1

00

67,500

58,500

64,300

3,010

6,870

4,020

58,700

63,400

59,000

7,850

8,830

7,960

1, 110

1,

060

1,10

0

Table 1. T-year peak discharges at gaging stations Continued

Map

No. 87

88

89

90

91 92

93

94

95

96

97

Station

No.

05446000

05446500

05446950

05447000

05447050

*0 5447200

05447350

05447500

05448000

05448050

05466000

Station name and location

Rock Creek at Morrison, 111.

Lat 41°47'50

M,

long 89°58'20", in

NE1/4NW1/4 sec. 19,

T.21 N.

, R.5

E.,

Whiteside Co

unty

.

Rock River near Joslin,

111.

Lat 41°33'35H

, long 90° 10

*55"

, in NE1/4

sec.

18,

T.18 N. ,

R.3

E.,

Rock Island Co

unty

.

Green River tributary near Am

boy,

111.

Lat 41°45'30", long 89°20'10", in SE1/4SW1/4 sec. 34,

T.21 N.,

R.10 E.,

Lee County.

Green River at Amboy, 111.

Lat 41°42'35", lo

ng 89°19'28", in SE1/4NE1/4 se

c. 22,

T.20 N.

, R.10 E.,

Lee County.

Green River tributary No.

2 near Oh

io,

111.

Lat 41»39'13", lo

ng 89°27'21", in NWl/4

sec.

10,

T.19 N. ,

R.9

E. ,

Lee Co

unty

.

Normandy Ditch at Normandy, 11

1.Lat 41

033

150"

, long 89°39'20", in SW1/4NE1/4 se

c. 11,

T.18 N.

, R.7

E.,

Bureau County.

Mud Creek tributary near Atkinson, 111.

Lat 41°20'42

tt,

long 90°02

138",

in NE1/4SW1/4 se

c. 28,

T.16 N. ,

R.4

E.,

Henry County.

Green River near Geneseo, 11

1.Lat 41°29

>20M

, long 90°09'30", in NE1/4SW1/4 se

c. 4,

T.17 N.

, R.3

E.,

Henry Co

unty

.

Mill Creek at Milan, 111.

Lat 41°26'32", long 90

033'21

tt, in NW1/4NE1/4 sec. 25,

T.17 N.

, R.2

W.,

Rock Island County.

Sand Creek near Milan, 11

1.Lat 41»24'05", long 90

036'20", in SE1/4SE1/4 sec. 4,

T.16 N.

, R.2

W. ,

Rock Island County.

Edwards River near Orion, 111.

Lat 41°16

t20",

long 90°22

I40"

, in N

E1/4SEl/4

sec. 21,

T.15 N.

, R.1

E. ,

Henry County.

Q2

2,050

2,580

2,080

22,900

31,800

23,300 88

130

95

2,860

2,740

2,850

146

385

178

47

190

178

187

5,890

9,250

6,040

2,780

2,180

2,740 36 72 40

3,370

2,830

3,330

Qs 2,900

4,210

3,010

33,400

48,500

34,100

200

242

211

4,340

4,430

4,350

233

675

314 72

329

321

326

8,240

14,800

8,510

5,040

3,710

4,910 79 136

89

4,760

4,850

4,780

QIO

3,480

5,280

3,670

39,900

59,300

41,000

308

323

313

5,220

5,550

5,250

297

879

419 89

442

424

436

9,570

18,500

10,000

6,670

4,760

6,470

120

182

132

5,560

6,310

5,610

°-25

4,240

6,640

4,530

47,600

72,400

49,200

488

432

467

6,210

6,930

6,270

384

1,14

0560

109

611

557

590

11,100

23,100

11,700

8,790

6,120

8,470

186

244

199

6,430

8,200

6,560

Qso

4,810

7,620

5,180

53,000

81,800

55,100

658

515

603

6,850

7,940

6,950

452

1,34

066

7

123

755

659

716

12,0

0026,400

12,800

10,4

007,140

9,980

247

292

258

6,980

9,660

7,190

QIOO

5,400

8,590

5,820

58,100

91,000

60,500

861

600

755

7,450

8,930

7,590

524

1,540

776

136

918

762

851

12,9

0029,700

13,9

00

12,0

008,150

11,5

00 317

340

323

7,480

11,1

007,780

Table 1. T-year peak discharges at gaging stations Continued

w

Hap

No. 98

99

100

101

102

103

104

105

106

107

108

Station

No.

05466500

05467000

05467500

05468000

05468500

05469000

05469500

05469750

05495200

05495500

05496900

Station name and location

Edwards River near New Bo

ston

, 11

1.Lat 41°11'15", long 90°58'05", at quarter corner

between se

es. 21 and 28,

T.14 N.

, R.5

W. ,

Mercer County.

Pope Creek near Keithsburg, 111.

Lat 41»07'42", long 90

055'10", in SEl/4SE

l/4

sec. 11,

T.13 N.,

R.5

W.,

Mercer County.

Henderson Creek near Little York,

111.

Lat 41°02'35", long 90°44'45", between sees. 8 and

9, T.12 N.

, R.3

W. ,

Warren County.

North Henderson Creek near Seaton,

111.

Lat 41°05'25", long 90°46'25", near center of

sec.

30, T.13 N.

, R.3

W. ,

Mercer County.

Cedar Creek at Little York,

111.

Lat 41°00'50", long 90°44'45", between sees. 20

and 21,

T.12 N.

, R.3 W. ,

Warren County.

Henderson Creek near Oquawka, 11

1.Lat 41°00'05", long 90°51'15", in NE1/4SW1/4 sec. 28,

T.12 N. ,

R.4 W. ,

Henderson County.

South Henderson Creek

at Biggsville, 11

1.Lat 40°51'25", long 90°51'50", between sees. 16

and 17

, T.10 N.

, R.4

W. ,

Henderson County.

Ellison Creek tributary near Roseville, 11

1.Lat 40°44'00", long 90°45'35", near quarter section

corner between se

es. 29 and 32,

T.9 N.

, R.

3 W. ,

Warren County.

Little Creek near Breckenridge, 11

1.Lat 40°15'00", long 91°19'15", in E1

/S se

c. 16,

T.3 N.

, R.8 W.

, Hancock County.

Bear Creek near Marcelline, 11

1.Lat 40°08'34", long 91°20'14", between se

es. 20

and 21,

T.2 N. ,

R.8 W. ,

Adams County.

Homan Creek tributary near Quincy, 111.

Lat 39°58'45", long 91°22'40", in

SWl/4

sec.

18,

T.I

S.,

R.8 W.

, Adams County.

Q2 4,060

4,800

4,090

2,310

2,620

2,320

2,290

2,540

2,310

1,10

01,

450

1,170

2,290

2,320

2,300

4,840

5,650

4,880

1,77

01,890

1,78

0 54

42 52

395

255

370

8,970

6,640

8,790

251

188

238

Qs 6,370

8,040

6,460

3,680

4,460

3,740

4,100

4,330

4,130

1,440

2,500

1,630

4,540

3,970

4,490

8,200

9,570

8,320

3,220

3,270

3,230 93 78 90 743

466

684

14,7

0011

,000

14,4

00 465

359

441

210

7,910

10,3

008,070

4,670

5,750

4,750

5,690

5,610

5,680

1,620

3,250

1,94

0

6,380

5,150

6,250

10,9

0012

,400

11,100

4,520

4,270

4,480

119

105

117

1,01

0619

916

18,700

14,0

0018,200

619

488

587

225

9,820

13,200

10,1

00

5,940

7,430

6,080

8,170

7,260

8,000

1,820

4,230

2,320

9,080

6,680

8,770

15,0

0016,000

15,100

6,580

5,570

6,380

152

141

150

1,36

0822

1,220

23,700

17,800

23,000

820

662

780

Qso

11,2

0015

,500

11,6

00

6,930

8,690

7,110

10,400

8,530

10,000

1,95

04,970

2,590

11,3

007,850

10,8

00

18,4

0018,800

18,5

00

8,470

6,560

8,050

177

169

175

1,64

0979

1,460

27,400

20,700

26,500

971

798

925

QIOO

12,6

0017

,700

13,0

00

7,940

9,950

8,150

13,0

009,770

12,3

00

2,070

5,710

2,840

13,700

9,020

13,000

22,300

21,600

22,200

10,7

007,570

10,0

00 200

198

200

1,92

01,140

1,71

0

31,000

23,500

30,000

1,12

0940

1,070

Table 1. T-year peak discharges at gaging stations Continued

Map

N

o.

109

1 10

111

1 12

1 13

1 14

115

1 16

117

1 18

1 19

Sta

tion

Sta

tion

na

me

and lo

cati

on

No.

05

50

15

00

B

urt

on

Cre

ek tr

ibu

tary

near

Bu

rto

n,

111.

Lat

39e5

6'0

0",

long

91°1

3f1

5",

in

SW

1/4S

W1/

4 se

c.

33

,T

.1

S.,

R.7

W

., A

dam

s C

ou

nty

.

05

50

20

20

H

adle

y

Cre

ek

near

Barr

y,

111.

Lat

39<>

42 '4

8",

long 91»03'5

6",

in

SW

l/4SW

l/4

sec.

14,

T.4

S

.,

R.6

W

., P

ike

Co

un

ty.

05

50

20

40

H

adle

y

Cre

ek at

Kin

der

ho

ok

, 1

11

.L

at

39

»4

1t3

5l>

, lo

ng

91e08'5

511

, in

S

El/

jNE

l/j

sec.

25,

T.4

S

.,

R.7

W

. ,

Pik

e C

ounty

.

05

50

21

20

R

iser

Cre

ek tr

ibu

tary

n

ear

Barr

y,

11

1.

Lat

39<>

41I0

5I>

, lo

ng

91<

>00

'00

I>,

in

SW

l/jS

El/

j se

c.

29,

T.4

S

. ,

R.5

W

., P

ike

County

.

05

51

25

00

B

ay

Cre

ek at

Pit

tsfi

eld

, 111.

Lat

39<

>37'3

0",

lo

ng

90

°47

'40

I>,

in

NE

1/4S

WV

4 se

c.

18,

T.5

S

.,

R.3

W

., P

ike

County

.

05513000

Bay

C

reek

at

Neb

o,

11

1.

Lat

39026'3

5M

, lo

ng

90e4

5l4

5l>

, in

N

W1/

4NW

1/4

sec.

19,

T.7

S

.,

R.3

W

., P

ike

Co

un

ty.

05

51

32

00

S

alt

S

pri

ng

C

reek

n

ear

Gil

ead,

111.

Lat

39

°07

'00

",

long

90e3

9'5

0l>

, in

SW

1/4

sec. 8

,T

.11

S.,

R

.2

W.,

Cal

houn

County

.

05

51

80

00

K

ankak

ee

Riv

er

at

Sh

elb

y,

Ind

.L

at

41e10'5

8",

lo

ng

87

e20

l33

l>,

in

SW1/

4NE

1/4

sec.

33,

T.3

2

N.

, R

.8

W.,

Lak

e C

ounty

.

05519500

Wes

t C

reek

near

Schneid

er,

In

d.

Lat

41e

12I5

2l>

, lo

ng

87e2

9'3

6l>

, in

N

Wl/

jNE

l/j

sec.

19

,T

.32

N

. ,

R.9

W

., L

ake

County

.

05520000

Sin

gle

ton

Dit

ch at

Illi

no

i,

111.

Lat

41e

11l2

0",

lo

ng

87e3

1'3

5'*

, in

SW

1/4N

W1/

4 se

c. 8

,T

.31

N.

, R

.15

E.

, K

ank

akee

C

ounty

.

05

52

05

00

K

ankak

ee

Riv

er

at

Mom

ence

, 1

11

.L

at

41e09'3

6",

long

87

»4

0t0

711

, in

S

Wl/

jNE

l/4

sec.

24,

T.3

1

N.

, R

. 13

E

.,

Kan

kak

ee

County

.

82

163

115

151

4,5

50

2,9

60

4,3

30

6,4

40

4,0

80

6,2

20

371

252

34

8

4,8

20

2,1

90

4,5

40

6,9

80

5,3

10

6,8

40

27

54

70

303

4,2

40

5,0

40

4,2

60

95

76

28

91

8

1,7

20

2,7

10

1,7

90

6,4

70

7,1

30

6,5

00

as 344

217

304

6,7

10

5,2

60

6,5

00

10

,50

07,1

80

10,1

00

63

847

660

0

8,4

10

3,8

20

7,8

70

11,9

00

9,0

80

11

,70

0

511

904

592

5,1

40

7,5

50

5,2

20

1,3

80

99

31

,32

0

2,1

20

4,3

70

2,2

80

8,5

90

10

,80

08

,67

0

5,0 49

529

34

26

8,0

90

6,9

20

7,9

10

13,1

00

9,4

00

12,7

00

84

36

44

791

10

,90

04,9

80

10

,10

0

15

,30

01

1,7

00

15,0

00

70

61,2

40

82

8

5,6

50

9,1

00

5,7

80

1,6

40

1,2

20

1,5

70

2,3

50

5,4

50

2,5

80

9,8

20

13,0

00

9,9

30

225 71

639

559

6

9,7

10

9,1

40

9,6

20

16

,30

012,3

00

15,8

00

1,1

30

873

1,0

60

14

,10

06,5

00

13

,00

0

19

,60

01

5,1

00

19,1

00

99

81,6

90

1,1

70

6,2

10

10

,90

06,4

10

1,9

40

1,5

00

1,8

70

2,6

00

6,7

90

2,9

40

11,2

00

15

,70

01

1,4

00

Qso 8

97

47

573

3

10,8

00

10,8

00

10,8

00

18,6

00

14

,60

018,1

00

1,3

60

1,0

50

1,2

70

16,4

00

7,6

60

15,1

00

22,8

00

17,7

00

22,2

00

1,2

50

2,0

60

1,4

50

6,5

80

12,2

00

6,8

40

2,1

50

1,7

00

2,0

70

2,7

70

7,7

60

3,1

80

12,2

00

17,6

00

12,4

00

QIOO

1,0

90

55

78

79

11

,90

01

2,6

00

12,1

00

20,7

00

16

,90

020,2

00

1,6

10

1,2

40

1,5

00

18,7

00

8,8

10

17,2

00

25,9

00

20,3

00

25,2

00

1,5

20

2,4

40

1,7

60

6,9

00

13,4

00

7,2

30

2,3

60

1,8

90

2,2

60

2,9

20

8,6

90

3,4

20

13,0

00

19

,40

01

3,3

00

Table 1. T-year peak discharges at gaging stations Continued

Map

No

.

120

121

122

123

124

125

126

127

128

129

130

Sta

tio

n

No.

0552

4500

0552

5000

0552

5050

0552

5500

0552

6000

0552

6150

0552

6500

0552

7050

0552

7500

0552

7800

0552

7840

Sta

tion

nam

e an

d lo

cati

on

Iro

qu

ois

R

iver

n

ear

Fo

resm

an,

Ind.

Lat

4005

2'1

4",

lo

ng 8

7°1

8'2

4",

in

N

El/

jSE

l/j

sec.

15,

T.2

8

N.

, R

.8

W. ,

N

ewto

n C

ou

nty

.

Iro

qu

ois

R

iver

at

Iroquois

, 1

11

.L

at

40°4

9'2

5",

lo

ng 87°3

4'5

5",

in

N

E1/4

SE1/

4 se

c.

15,

T.2

7

N.,

R. 1

1 W

., Ir

oq

uo

is

Co

un

ty.

Eas

tbu

rn

Hol

low

nea

r S

hel

don,

111.

Lat

40°4

6'3

0",

lo

ng

87°3

8'4

0",

in

N

E1/4

NW

1/4

sec. 6

,T

.26

N.,

R.1

1 W

. ,

Iroquois

C

ou

nty

.

Sugar

C

reek

at

Mil

ford

, 111.

Lat

40°3

7'5

0",

lo

ng 87°4

3'2

5",

in

N

Wl/j

NE

l/j se

c.

16,

T.2

5

N.,

R. 1

2 W

. ,

Iro

qu

ois

C

ou

nty

.

Iro

qu

ois

R

iver

n

ear

Cheb

anse

, 111.

Lat

41

°00

'32

",

long

8704

9'2

7",

in

S

El/

jsw

l/4

sec.

10,

T.2

9

N.,

R

.13

W. ,

K

anka

kee

County

.

Kan

kak

ee

Riv

er tr

ibu

tary

near

Bo

urb

on

nai

s,

11

1.

Lat

41

°11

f35",

lo

ng

87°5

7tO

O",

in

SW

l/4

sec. 3

,T

.31

N.

, R

.11

E.,

K

anka

kee

Co

un

ty.

Ter

ry

Cre

ek

nea

r C

ust

er

Par

k,

111.

Lat

41°1

4'0

0",

lo

ng

8

8°0

5'5

5",

near

south

wes

t co

rner

of

SE

l/t

sec.

20,

T.3

2

N.

, R

.10

E.,

W

ill

County

.

Pra

irie

C

reek

n

ear

Fra

nkfo

rt,

111.

Lat

41

°26

'12

",

long

8

7°5

0'4

2",

in

N

W1/

4 se

c.

15

,T

.34

N.

, R

. 12

E.,

W

ill

Co

un

ty.

Kan

kake

e R

iver

n

ear

Wil

min

gto

n,

111.

Lat

41°2

0'4

8",

lo

ng 88°1

1'1

1",

in

N

W1/

4NW

1/4

sec.

15,

T.3

3

N.,

R.9

E

. ,

Wil

l C

ou

nty

.

Des

P

lain

es

Riv

er at

Ru

ssell

, 111.

Lat

42°2

9'2

2",

lo

ng 8

7°5

5I3

2",

in

SE

1/4

sec. 3,

T.4

6

N.

, R

.11

E.,

Lak

e C

ou

nty

.

Des

P

lain

es

Riv

er at

Wad

swo

rth

, 111.

Lat

4

2°2

5'4

5",

lo

ng

87<>

55'4

9",

in

N

Wl/j

NE

l/j se

c.

34

,T

.46

N.

, R

.11

E.,

L

ake

Co

un

ty.

Q2

2,7

70

3,4

40

2,8

10

3,7

20

3,9

60

3,7

30

240

377

258

6,5

50

5,7

40

6,4

90

12,8

00

7,6

00

12,6

00 33 33 33 158

512

179 90 76 87

23

,30

01

7,1

00

23

,10

0

658

796

668

802

818

804

25 3,6

80

5,4

00

3,8

10

5,2

80

6,1

40

5,3

50

521

632

545

11,0

00

9,3

30

10,8

00

18,5

00

11,5

00

18

,10

0 82 60 78

292

869

361

168

134

158

35

,40

02

6,1

00

35

,00

0

1,2

70

1,2

20

1,2

60

1,5

10

1,2

50

1,4

80

Qio

4,2

50

6,6

70

4,4

60

6,3

10

7,5

00

6,4

00

783

805

789

14,3

00

11,7

00

14,0

00

22

,20

014,0

00

21

,70

0

132 79 119

413

1,1

10

521

238

173

215

43,7

00

31,7

00

43,0

00

1,7

20

1,4

90

1,6

90

2,0

10

1,5

10

1,9

30

Q25

4,9

20

8,2

00

5,2

50

7,5

70

9,1

60

7,7

30

1,2

10

1,0

20

1,1

50

18

,70

01

4,8

00

18

,10

0

26

,80

01

6,9

00

26

,00

0

215

103

182

607

1,4

30

764

348

223

299

54

,20

03

8,5

00

53

,10

0

2,3

10

1,7

90

2,2

40

2,6

30

1,8

20

2,4

70

Qso

5,4

00

9,2

90

5,8

10

8,4

90

10

,30

08,6

90

1,6

00

1,1

80

1,4

60

22,1

00

17,0

00

21,3

00

30,1

00

19

,00

029,1

00

294

121

238

785

1,6

50

968

447

261

369

62

,10

043,4

00

60

,70

0

2,7

50

2,0

10

2,6

40

3,0

70

2,0

30

2,8

40

QIOO

5,8

60

10,4

00

6,3

50

9,4

20

11,4

00

9,6

40

2,0

60

1,3

30

1,7

90

25

,70

019,1

00

24,6

00

33,3

00

20,9

00

32,1

00

388

139

303

995

1,8

80

1,2

00

562

297

447

70,0

00

48,0

00

68,1

00

3,2

00

2,2

10

3,0

30

3,4

90

2,2

20

3,1

90

Table 1. T-year peak discharges at gaging stations Continued

co

00

Map

Station

No.

No.

131

*05527870

132

05527900

133

*05527950

134

05528000

135

*05528150

136

*05528170

137

*05528200

138

*05528230

139

05528360

Station name and location

Mill Creek at Wedges Co

rner

, 111.

Lat 42°23'00", long 88°00'15", in

NW

1/4N

W1/4

sec. 18,

T.45 N.,

R.11

E.,

Lake County.

North Mill Creek at Hickory Corners, 11

1.Lat 42°27

158"

/ long 88°00'32", in SW1/4NE1/4 se

c. 13,

T.46 N.

, R.10 E. ,

Lake County.

Mill Creek at Old Mill Cr

eek,

11

1.Lat 42°24'55

>*, long 87°58'08", in SW1/4SE1/4 se

c. 32,

T.46 N.

, R.

11 E.,

Lake County.

Des Plaines River near Gurnee, 111.

Lat 42°20'39", long 87°56'18", in SE1/4SW1/4 se

c. 27,

T.45 N.

, R.11 E.,

Lake County.

Indian Creek at Diamond La

ke,

111.

Lat 42°13

127M

, long 88°00'17

11, in NW

1/4N

W1/4

se

c. 7,

T.43 N.

, R.11 E. ,

Lake County.

Diamond Lake Drain at Mundelein, 111.

Lat 42

° 14' 56", long 87°59'37M

, in SW1/4NE1/4 sec.31,

T.44 N.

, R.

11 E.

, Lake Co

unty

.

Hawthorn Drainage Ditch near Mundelein, 11

1.Lat 42

014'25",

long 87°57'42", in NW

l/^N

Wl/4

se

c. 4,

T.43 N.

, R.

11 E. ,

Lake County.

Indian Creek at Prairie View,

111.

Lat 42°12'34", long 87<>57'18",

in NW

1/4NEl

/4 se

c. 16,

T.43 N.

, R.

11 E.,

Lake County.

Aptakisic Creek at Aptakisic, 111.

Lat 42°10'05", long 87o56'58", in SE1/4SE1/4 se

c. 28,

T.43 N.

, R.11 E.,

Lake County.

Q2 83

208

202

207

486

1,330

1,120

1,32

0

283

54

209

494

110

100

108

25 13

9

306

313

307

812

1,950

1,700

1,930

522

76

318

._

802

192

165

187

210 180

372

381

374

1,02

0

2,340

2,060

2,310

697

_ 90

394

1,02

0

254

208

243

225 23

7

457

460

457

1,26

0

2,820

2,470

2,780

930

108

497

1,290

340

261

318

2s o 28

2

520

515

519

1,42

0

3,160

2,750

3,120

1,110

120

576

1,500

407

299

375

2ioo 329

583

565

578

1,570

3,490

3,020

3,440

1,290

133

_

659

1,710

479

335

434

140

*05528400

Des Plaines River at Wheeling, 111.

1,760

2,640

3,170

3,770

4,180

4,540

Lat 42°08'21", long 87°54'14", in SW1/4SW1/4 sec.1,

T.42 N. ,

R.

11 E.

, Cook County.

141

*05528440

Buffalo Creek near Lake Zu

rich

, 111.

81

130

166

213

250

287

Lat 42°10'58", long 88°03'02", in NW1/4NE1/4 sec.27,

T.43 N. ,

R.10 E.,

Lake County.

Table 1. T-year peak discharges at gaging stations Continued

Map

Station

No.

No.

Station na

me and location

QIO

Q25

QIOO

142

*05528470

Bu

ffalo

C

reek

at

Long G

rove,

1

11

.L

at

42°1

0I3

8",

lo

ng

87»59

I57

M,

in

SE1/

4NW

1/4

sec.3

0,

T.4

3

N.,

R.1

1 E

.,

Lak

e C

ou

nty

.

22

936

7457

566

643

717

143

*05528500

Bu

ffalo

C

reek

n

ear

Wh

eeli

ng

, 1

11

.L

at

42°0

9'1

5",

lo

ng

87

»5

7'2

5",

in

N

El/

jNW

l/4

sec.4

, T

.42

N.,

R.1

1 E

.,

Coo

k C

ounty

.

36

45

69

69

28

32

92

41,0

10

144

05529000

Des

P

lain

es

Riv

er

near

Des

P

lain

es,

111.

2,1

80

3,1

60

3,7

60

4

,45

0

4,9

10

5,3

50

Lat

42°0

4I5

5",

lo

ng

87«53

I25",

in

S

El/

jSE

l/j

sec.2

5,

1,4

90

2,2

40

2,7

00

3,2

40

3,6

10

3,9

40

T.4

2

N.,

R.1

1 E

.,

Coo

k C

ou

nty

. 2,1

40

3,1

00

3,6

90

4,3

50

4,8

00

5,2

20

145

*05529300

McD

on

ald

C

reek

n

ear

Wh

eeli

ng

, 111.

186

334

44

2

58

5

69

5

80

6L

at

42°0

7'1

4",

lo

ng

87°5

6I4

7M

, in

N

W1/

4NW

1/4

sec.1

5,

T.4

2

N.

, R

.11

E.

, C

ook

Co

un

ty.

U)

VO

146

*0

55

29

50

0

McD

on

ald

C

reek

n

ear

Mou

nt P

rosp

ect,

1

11

.L

at

42°0

5'4

3",

lo

ng

8705

4'4

6",

in

SW1/

4SE

1/4

sec.

23

, T

.42

N

.,

R.1

1 E

.,

Coo

k C

ounty

.

193

36

84

97

66

9800

93

0

147

*05529900

We H

er

Cre

ek at

Mou

nt P

rosp

ect,

111.

Lat

42

°03

'32

M,

long

87°5

712

3",

in

N

E1/

4sw

1/4

sec.1

1,

T.4

1

N.,

R.1

1

E.,

C

ook

County

.

48

2778

991

1,2

70

1,4

90

1

,72

0

148

*05530000

Well

er

Cre

ek at

Des

P

lain

es,

111.

Lat

42°0

2t5

8",

lo

ng 87«55'0

5",

in

N

Wl/4

NW

l/4 se

c.

18,

T.4

1

N.,

R.1

2

E.,

C

ook

Co

un

ty.

677

1,030

1,26

01,

530

1,72

0 1,

900

149

*05530400

Higgins Creek near Mount Prospect, 111.

Lat 42°02

I04"

, long 87°57'35", in

NW1/4NWV4

sec.23,

T.41 N.,

R.11

E.

, Cook County.

137

247

330

445

536

631

150

*05530480

Willow Creek at Orchard Pl

ace,

11

1.Lat 41°59'49", long 87°52

I47",

in SE1/4SW1/4 se

c. 33,

T.41 N.,

R.12

E.,

Cook

County.

586

1,070

1,430

1,92

0 2,310

2,710

151

*05530600

Des

P

lain

es

Riv

er

at

Riv

er

Gro

ve,

1

11

.L

at

41°5

5'4

6",

lo

ng 87°5

0'4

0",

in

N

W1/4

sw1/

4 sec.2

6,

T.4

0

N.,

R.1

2 E

.,

Coo

k C

ounty

.

2,5

80

3,3

80

3,8

30

4,3

10

4,6

20

4,8

90

152

*05530700

Sil

ver

Cre

ek at

Mel

rose

P

ark

, 111.

Lat

41°5

4'1

8",

lo

ng 87°5

0'4

0",

in

N

W1/

4NW

1/4

sec.2

, T

.39

N

.,

R.1

2

E.,

C

ook

County

.

44

6557

62

26

96

74

67

93

Table

1. T-year peak discharges at

gaging stations Continued

Map

N

o.S

tati

on

N

o.S

tati

on

na

me

and

locati

on

Q2Q

25

153

*055

3080

0 D

es

Pla

ines

Riv

er at

Fore

st

Par

k,

111.

2,7

70

3,6

80

4,1

80

4,7

10

5,0

50

5,3

50

Lat

41*52'0

5",

lo

ng

87»49'3

9",

in

S

El/

jSE

l/j

sec.

14,

T.39 N.,

R. 12

E.,

Cook

Co

unty

.

154

*055

3094

0 Sa

lt Cr

eek

at Pala

tine

, 111.

201

288

351

436

503

573

Lat

42*06'38", long 88*03

f47"

, in SWl/4S

Wl/4 sec. 15,

T.42 N.

, R.

10 E.,

Cook

Co

unty

.

155

*055

3096

0 Sa

lt Cr

eek

near

Palatine,

111.

Lat 42

*04'

26",

lo

ng 88*02'38", in

NW1/4SW1/4 se

c.35

, T.42 N.,

R.10 E.,

Cook

Co

unty

.

156

*055

3099

0 Sa

lt Cr

eek

at Ro

llin

g Meadows, 111.

Lat

42°03'37", lo

ng 88*00'59", in SWV4NW1/4

sec.

8,

T.41 N.

, R.

11 E.

, Cook Co

unty

.

300

650

466

816

583

915

735

1,030

851

1,11

0

969

1,180

157

*055

3100

0 Salt Creek

near

Arlington

Heights, 111.

453

700

864

1,070

1,22

0 1,

360

Lat 42°03'02", lo

ng 88°00'31", in NE1/4NW1/4 sec. 17,

__

__

T.41 N.,

R.11 E. ,

Cook Co

unty

.

158

*055

3105

0 S

alt

C

reek

n

ear

Woo

d D

ale,

1

11

. 65

9 99

7 1,2

40

1,5

60

1,8

10

2,0

70

Lat

41»59'3

4",

lo

ng

8

7°5

9'4

4M

, in

N

W1/

4NW

1/4

sec.4

,

T.4

0

N.,

R

.11

E.,

D

u P

age

Co

un

ty.

159

*055

3108

0 S

pri

ng

Bro

ok

at

Blo

om

ing

dal

e,

11

1.

177

262

324

409

477

549

Lat

41»57'3

1",

lo

ng 88°0

4'1

4",

in

N

W1/

4NW

1/4

sec.

14

,

T.4

0

N.,

R

.10

E.,

Du

Pag

e C

ounty

.

160

*055

3110

0 M

each

am C

reek

at

Med

inah

, 11

1.

61

96

122

161

192

227

Lat

41

*58

t39

",

lon

g 88°0

2'5

2",

in

SW

1/4

sec.

1,

T.4

0

N.

, R

.10

E.,

Du

Pag

e C

ou

nty

.

161

*055

3113

0 S

pri

ng

Bro

ok at

Wal

nu

t A

venu

e at

Itasc

a,

111.

245

359

439

545

627

711

Lat

41°5

8'1

6",

lo

ng

8

8*

00

'47

",

in

SE1/

4NW

1/4

sec.8

,

T.4

0

N.,

R

.11

E.,

Du

Pag

e C

ounty

.

162

*055

3120

0 S

alt

C

reek

at

Ad

dis

on,

111.

83

8 1,1

30

1,3

30

1,5

70

1,7

60

1,9

50

Lat

41

*5

5'4

4",

lo

ng

87°5

8I4

0",

in

SW

1/4N

W1/

4 se

c.2

7,

T.4

0

N.,

R.1

1 E

.,

Du

Pag

e C

ounty

.

163

*055

3130

0 S

alt

C

reek

at

Elm

hurs

t,

111.

96

1 1,2

70

1,4

80

1,7

40

1,9

40

2,1

40

Lat

41°5

3'2

0",

lo

ng 87°5

7'4

1",

in

N

E1/

JNE

1/4

sec.

10

,

T.3

9

N.

, R

.11

E.,

Du

Pag

e C

ou

nty

.

Table 1. T-year peak discharges at gaging stations Continued

Map

Station

No.

No.

Station name and location

Q2Qio

Q25

Qioo

164

*055

3138

0 S

alt

C

reek

at

Oak

B

roo

k,

111.

1,0

30

1

,34

0

1,5

10

Lat

41«5

1I3

9",

lo

ng

87e5

6'5

2",

in

SW

l/4SE

l/4

sec.2

3,

T.3

9

N.,

R

.11

E.,

Du

Pag

e C

ou

nty

.

165

*055

3150

0 S

alt

C

reek

at

Wes

tern

S

pri

ngs,

111.

1,1

60

1,5

30

1,7

40

Lat

41°4

9'3

5",

lo

ng 87°5

4'0

0",

in

N

E1/

4SE

1/4

sec.3

1,

T.3

9

N.,

R.

12 E

.,

Coo

k C

ounty

.

1,7

10

1,8

50

1,9

70

1,9

80

2,1

50

2,3

00

166

*055

3180

0 A

ddis

on

Cre

ek at

No

rth

lak

e,

111.

Lat

41°5

4'3

7",

lo

ng

87°5

4'1

0",

in

SW

l/4sw

1/4

sec.3

2,

T.4

0

N.,

R.1

2 E

.,

Coo

k C

ou

nty

.

312

376

410

44

64

70

49

0

167

*055

3200

0 A

ddis

on

Cre

ek at

Bel

lwo

od

, 111.

454

605

690

Lat

41°5

2'4

8",

lo

ng

87°5

2'0

7",

in

SW

1/4S

E1/4

se

c.9

,

T.3

9

N.,

R.1

2 E

.,

Coo

k C

ou

nty

.

168

*05532500

Des Plaines River at Riverside, 11

1.

3,860

5,170

5,940

Lat 41«49'20", long 87«49

I15",

in SWl/4SWl/4

sec.36,

T.39 N.,

R.12 E.

, Co

ok County.

784

846

902

6,7

90

7,3

70

7,9

00

169

*05533000

Flag Creek near Willow Springs, 11

1.L

at

41°4

4'2

0",

lo

ng 8

7°5

3'4

8",

in

SE

1/4N

E1/

4 se

c.3

1,

T.3

8

N.,

R

.12

E.,

Coo

k C

ou

nty

.

752

1,250

1,63

02,150

2,560

3,000

170

*05533200

Sawmill Creek tributary near Tiedtville, 111.

Lat 41

e44'05", long 87°58'00", in NE1/4SW1/4 sec.34,

T.38 N.,

R.11 E.

, Du

Page County.

232

280

305

332

349

365

171

*05533300

Wards Creek near Woodridge, 111.

80

114

134

Lat 41°43'32", long 87»59'19", in SW

1/4N

W1/4

sec.4,

T.37 N.,

R.11 E.,

Du Page County.

172

*05533400

Sawmill Creek near Lemont, 111.

576

909

1,11

0Lat 41«42

I28",

long 87°57

t45",

in NE1/4SW1/4 sec.10,

T.37 N.

, R.11 E.

, Du

Page County.

173

*05533500

Des Plaines River at Lemont, 111.

3,120

4,190

4,800

Lat 41°40'54", long 88°00'09", in SE1/4NW1/4 sec.20,

T.37 N.

, R.11 E.

, Cook County.

157

173

188

1,3

40

1,5

00

1,6

30

5,4

80

5,9

20

6,3

20

174

*05534300

North Branch Chicago River at Lake Forest, 111.

Lat 42

° 14

'24"

, long 87»52'50", in NE

1/4N

W1/4

sec.6,

T.43 N.

, R.12 E.,

Lake County.

192

262

303

349

380

409

Table 1. T-year peak discharges at gaging stations Continued

Map

St at ion

No

. No

. Station name and location

Q2

Q5

Q1Q

Q25

Q5Q

Q1Q

O

175

*05534400

North Branch Chicago River at

Bannockburn, 11

1.

247

320

360

404

432

456

Lat 42°12

I00",

long 87°51'10", in

SW

1/4S

E1/4

sec. 17,

T.43 N.

, R.12 E.,

Lake County.

176

*05534500

North Branch Chicago River at

Deerfield, 111.

298

437

526

633

709

783

Lat 42°09'10", long 87°49'07M

, in SWl/4SE

l/4

sec.34,

T.42 N.

, R.12 E.,

Lake County.

177

*05534600

North Branch Chicago River at Northfield, 111.

346

434

482

536

571

603

Lat 42°06'05", long 87°46'26", in NE1/4SE1/4 sec.24,

T.42 N.,

R.12 E. ,

Cook County.

178

*05534900

Skokie River at Lake Bluff, 11

1.

205

314

385

471

532

591

Lat 42°16'46", long 87«51'46", in NW1/4 sec.20,

T.44 N.

, R.12 E.

, Lake County.

179

*055

3500

0 S

kokie

R

iver

at

Lak

e F

ore

st,

111.

214

301

352

410

448

483

^

Lat

42

°13

'57

",

long 8

7°5

0'4

1",

in

N

WV

4SW

1/4

sec.4

,

to

T.4

3

N.,

R

.12

E.,

Lak

e C

ou

nty

.

180

*055

3507

0 S

ko

kie

R

iver

n

ear

Hig

hla

nd

Par

k,

11

1.

421

531

600

684

744

803

Lat

42

°09

'34

",

long 87°4

7'5

2",

in

NW

V4S

E1/4

se

c.3

5,

T.4

3

N.,

R.1

2 E

.,

Lak

e C

ounty

. _

__

__

_

181

*055

3515

0 S

ko

kie

R

iver

at

Nort

hfi

eld

, 111.

377

448

489

536

567

597

Lat

42°0

6'0

5",

lo

ng 8

7°4

5'3

3",

in

N

W1/

4SE1

/4

sec.

19,

T.4

2

N.,

R

.13

E.

, C

ook

County

.

182

*055

3520

0 N

ort

h

Bra

nch

C

hic

ago

R

iver

at

Gle

nv

iew

, 111.

691

872

983

1,1

20

1

,21

0

1,3

10

Lat

42°0

4'0

8",

lo

ng

87°4

6'2

8",

in

S

El/

jSE

l/fc

se

c.3

6,

T.4

2

N.,

R.1

2 E

.,

Coo

k C

ounty

.

183

*05535300

West Fork of North Branch Chicago River at

Bannockburn, 111.

209

285

332

388

427

464

Lat 42°12'00", long 87°53'24", in NE

1/4S

E1/4

sec.13,

T.43 N.

, R.

11

E.,

Lake County.

184

*05535400

West Fork of North Branch Chicago River at

Deerfield, 111.

364

453

504

562

601

638

Lat 42°10'02", long 87°51'24", in NW1/4NE1/4 sec.32,

T.43 N. ,

R.12 E.,

Lake County.

Table

1. T-year pe

ak discharges at

ga

ging

stations--Continued

Map

No.

Stat

ion

No.

Stat

ion

name

an

d location

Q25

Qso

u>

185

*05535500

West Fo

rk of North

Branch Ch

icag

o Ri

ver

atNo

rthb

rook

, 111.

47

4 67

9 801

Lat 42

°08'

18"

/ lo

ng 87

-50"

04",

in SWl/4S

El/4 se

c.4,

T.42 N.

, R.

12 E.

, Co

ok Co

unty

.

186

*0

55

35

70

0

Wes

t F

ork

of

Nort

h

Bra

nch

C

hic

ago

R

iver

at

Gle

nv

iew

, 111.

63

3

84

6

97

4L

at

42°0

5I1

3",

lo

ng

87

°48

I08",

in

N

E1/

4SW

1/4

sec.2

6,

T.4

2 N

.,

R.1

2 E

.,

Coo

k C

ou

nty

.

187

*0

55

35

80

0

Nort

h

Bra

nch

C

hic

ago

Riv

er

at

Mo

rto

n

Gro

ve,

111.

1,0

30

1

,34

0

1,5

30

Lat

42

°03

'00

",

long 8

7»

46

'50

",

in

SE1/

4NW

1/4

sec.

17,

T.4

1

N.,

R. 1

3 E

.,

Coo

k C

ounty

.

188

*0

55

36

00

0

No

rth

B

ranch

C

hic

ago

R

iver

at

Nil

es,

111.

1,1

20

1,4

40

1,6

30

Lat

42°0

0'4

4",

lo

ng

87

«4

7>4

5",

in

S

Wl/

jSE

l/4

sec.3

0,

T.4

1

N.,

R.

13 E

.,

Coo

k C

ounty

.

189

05536178

Plu

m C

reek

near

Dy

er,

Ind.

Lat

41°2

8'1

2",

lo

ng 87°3

1'5

7",

in

SE1/

4SW

1/4

sec.3

2,

T.3

5 N

.,

R.1

5 E

.,

Coo

k C

ounty

.

190

05536190

Hart

D

itch at

Nunst

er,

In

d.

Lat

41°3

3I4

0",

lo

ng

87°2

8I5

0",

in

SE

1/4N

W1/

4 sec.2

0,

T.3

6 N

.,

R.9

W

.,

Lak

e C

ounty

.

191

*0

55

36

20

1

Thorn

C

reek

at

Park

F

ore

st,

1

11

. 3

17

59

3 8

26

Lat

41°2

8I1

9",

lo

ng 87»40'2

6",

in

SW

1/4SW

l/4 sec.3

1,

T.3

5

N.

, R

.14 E

.,

Coo

k C

ounty

.

192

*055

3620

7 Thorn

Cree

k tributary

at Ch

icag

o Heights, 11

1.

253

410

534

Lat 41°30

I22"

, lo

ng 87

»39'

36",

in SWl/jNEl/j sec. 19,

T.35 N. ,

R.14 E. ,

Co

ok Co

unty

.

193

*05536210

Thorn

Creek

near

Ch

icag

o Heights, 11

1.

993

1,43

0 1,

730

Lat 41

-30'

50",

lo

ng 87

«38'

07",

in SE1/4SE1/4 sec. 17,

T.35 N.,

R.14

E.

, Co

ok Co

unty

.

194

*05536215

Thorn

Creek

at Glenwood,

111.

1,080

1,590

1,950

Lat 41

°31'

50",

lo

ng 87

«36

I20"

, in

SW1/4SE1/4 se

c.9,

T.35 N.

, R.14 E.

, Co

ok Co

unty

.

195

*0

55

36

23

5

Dee

r C

reek

near

Ch

icag

o H

eig

hts

, 1

11

. 5

28

71

7 84

1L

at

41°3

1I15",

lo

ng 87»35'2

5",

in

SE

1/4N

WV

4 sec.1

4,

T.3

5 N

.,

R.1

4

E.,

Coo

k C

ounty

.

93

9

1,0

30

1

,12

0

1,1

20

1,7

70

1,8

60

1,1

80

71

5

1,2

20

1,9

50

2,0

20

1,4

80

86

8

1,3

20

2,1

10

2,1

70

1,1

70

690

1,0

70

1,3

30

1,3

50

1,3

30

1,7

20

1

,12

0

1,5

90

1,8

70

2,2

10

1,8

90

2,0

50

1,4

10

1,8

90

2,2

10

2,7

90

2,2

60

2,4

30

1,7

70

2

,24

0

2,6

20

3,5

10

2,7

20

2,6

90

2,0

20

2,4

90

2,9

20

4,0

40

3,0

40

2,9

20

2,2

70

2,7

20

3,2

10

4,5

40

3,3

60

1,8

30

1,0

40

2,1

00

2,3

80

2

,66

0

2,4

40

2,8

20

3

,21

0

99

8

1,1

20

1,2

30

Table 1. T-year peak discharges at

gaging stations Continued

Map

No.

Station

No.

Station name and location

252io

225

250

2ioo

196

*05536238

Butterfield Creek near Lincoln Estates, 111.

Lat 41°30'22", long 87°46'34", in NEl/^SEl/4 se

c.19

, T.35 N.,

R.13 E.,

Cook County.

142

265

361

494

600

711

197

*05536255

198

*05536265

199

*05536270

200

*05536275

201

*055

36

29

0

Butterfield Creek at

Flossmoor, 111.

Lat 41°32

I25",

long 87°38'55", in NE

1/4N

W1/4

sec. 8,

T.35 N.

, R.14 E.,

Cook County.

Lansing Ditch near Lansing, 111.

Lat 41°31'40", long 87°31'45", at

north boundary

of se

c. 17, T.35 N.

, R.15 E.

, Cook Co

unty

.

North Creek near Lansing, 11

1.Lat 41°32

I45"

, long 87o33'30", in SE1/4SE1/4 se

c.1,

T.35 N.

, R.14 E.,

Cook County.

654

1,120

1,480

2,000

2,430

2,900

Thorn Creek at

Thornton, 111.

Lat 41

034

'05"

, long 87

036

'30"

, in

T.36 N.

, R.14 E.,

Cook County.

sec.

34,

Lit

tle

Cal

um

et

Riv

er

at

So

uth

H

oll

and,

111.

Lat

41

°36

'25

",

long 87°3

5'5

2",

in

N

E1/

4SE

1/4

sec.

15,

T.3

6

N.,

R

.14

E.,

C

ook

Co

un

ty.

197

356

295

513

355

612

2,0

50

2,9

70

3,5

70

2,5

20

3,3

60

3,8

60

42

5

73

2

47

3

817

51

7

89

9

4,3

10

4

,85

0

5,3

80

4,4

30

4,8

20

5,1

80

202

*05536310

Cal

um

et

Un

ion

D

rain

age

Can

al

near

Mar

kham

, 111.

Lat

4103

5'4

8",

long

87<

>39

'59

M,

in

SE1/

4NW

1/4

sec.1

9,

T.3

6

N.,

R

.14

E

.,

Coo

k C

ounty

.

20

3

*0

55

36

32

5

Lit

tle

Cal

um

et

Riv

er

at

Har

vey

, 111.

Lat

41°3

713

5",

lo

ng

87

<>

38

'05

",

in

SE1/

4NW

1/4

sec.9

, T

.36

N

.,

R.1

4

E.,

Coo

k C

ounty

.

204

*05536335

Mid

loth

ian

Cre

ek

near

Tin

ley

Park

, 1

11

.L

at

41°3

5'1

8",

lo

ng

87«44'5

2",

in

N

E1/4

NW

1/4

sec.2

8,

T.3

6

N.,

R

.13

E.,

Coo

k C

ou

nty

.

20

5

*05

53

63

40

M

idlo

thia

n

Cre

ek at

Oak

F

ore

st,

111.

Lat

41036'5

1",

long

87°4

314

6",

in

SE

1/4N

W1/

4 se

c.

15

, T

.36

N

.,

R.1

3

E.,

Coo

k C

ounty

.

206

*05

53

64

60

T

inle

y

Cre

ek

near

Oak

F

ore

st,

111.

Lat

41037'4

9",

long 8

7°4

7'0

5",

in

N

W1/

4NE1

/4 sec.7

, T

.36

N

.,

R.1

3

E.,

Coo

k C

ounty

.

305

397

449

507

546

581

1,9

90

2,9

70

3,5

90

221

24

9

42

0

29

4

347

63

5

34

4

41

5

782

4,3

30

4,8

60

5,3

50

410

50

7

460

57

8

512

65

2

969

1,1

10

1,2

50

Table 1. T-year peak discharges at gaging stations Continued

Map

N

o.S

tati

on

N

o.S

tati

on

nam

e an

d lo

cati

on

Q2Q2

5Qs

odoo

207

*05536500

Tinley Creek near Palos Park,

111.

547

923

1,210

1,60

0 1,

910

2,240

Lat 41°38'48", long 87°45'59", in SW1/4SE1/4 se

c. 32,

T.37 N.,

R.13 E.,

Cook County.

208

*055

3651

0 N

avaj

o

Cre

ek at

Pal

os

Heig

hts

, 11

1.

235

313

364

427

474

520

Lat

41°3

9'3

9",

lo

ng

87°4

7'3

8",

in

SW

l/4SW

l/4 se

c.

30

,

T.3

7

N.

, R

.13

E-,

C

ook

County

.

Ul

209

*05536560

210

*05536570

211

*05536620

212

*05536630

213

05537500

214

*05538000

Melvina Ditch near Oak Lawn,

111.

Lat 41°43'09", long 87°47'07", in

T.37 N.

, R.13 E.,

Cook County.

Stony Creek (W

est) at Worth, 111.

Lat 41°42'00", long 87°47'52", in

T.37 N.

, R.12 E.,

Cook County.

sec. 7

sec. 13,

Mil

l C

reek

n

ear

Pal

os

Park

, 111.

Lat

4

1°3

9'0

9",

lo

ng

87°5

012

3",

in

N

W1/

4SE1

/4 se

c.

34

, T

.37

N.

, R

.12

E.,

C

ook

County

.

Mil

l C

reek

at

Pal

os

Park

, 111.

Lat

41

°40

'27

",

long 87°5

0'3

5",

in

SW

l/fcS

El/a

se

c. 2

2,

T.3

7

N.

, R

.12

E.

, C

ook

County

.

Long Run near Lemont, 11

1.L

at

41e3

8'3

3",

lo

ng

8705

9'5

7",

in

S

Wl/

jSE

l/j

sec. 3

2,

T.3

7

N.

, R

.11

E.

, C

ook

Co

un

ty.

Des

P

lain

es

Riv

er at

Jo

liet,

111.

Lat

41e3

r54

",

long

88°0

5'0

5",

in

SE

1/4N

E1/

4 se

c. 9

, T

.35

N.

, R

.10

E.,

Wil

l C

ou

nty

.

140

41

5

121

209

58

55

30

581

15,4

00

234

710

185

44

5

1,0

60

873

1,0

40

18,1

00

301

92

3

227

669

1,4

60

1,1

00

1,4

00

19,6

00

387

1,2

00

279

1,0

40

2,0

30

1,3

90

1,9

10

21,3

00

453

1,4

20

317

1,4

00

2,5

20

1,5

90

2,3

30

22

,40

0

519

1,6

30

354

1,8

30

3,0

70

1,7

90

2,7

90

23

,40

0

215

*05538440

Spring Creek near Orland Park,

111.

41

60

73

89

100

112

Lat 41

e36'02", long 87°54'02", in

NW

1/4N

E1/4

sec.19,

T.36 N.

, R.12 E.,

Cook County.

216

*055

3900

0 H

ickory

C

reek

at

Jo

liet,

111.

2,8

30

5

,06

0

7,0

00

10

,10

0

12,9

00

16,1

00

Lat

41°3

1'1

0",

lo

ng

88°0

4'1

0",

in

SE

1/4N

E1/

4 se

c.1

5,

T.3

5

N.

, R

.10

E.

, W

ill

County

.

217

*05539870

West Branch Du Page River at Ontarioville, 11

1.

313

498

616

756

853

944

Lat 41

e58'42", long 88°07'59", in

NW1/4SE1/1 sec.6,

T.40 N.

, R.

10 E. ,

Du Page County.

Table 1. T-year peak discharges at gaging stations Continued

Map

Station

No.

No.

Station name and location

Q2

225

Qso

QIOO

21

8

*0

55

39

89

0

Wes

t B

ranch

D

u P

age

Riv

er

near

Way

ne,

111.

48

8

78

8

1,0

10

1,3

00

1,5

40

1,7

80

Lat

41

°56

'37

",

long

88

01

0'5

1",

in

NW

1/4N

W1/

4 sec.2

3,

T.4

0

N.

, R

.9

E.,

D

u P

age

County

.

219

*05539900

Wes

t B

ranch

D

u P

age

Riv

er

near

Wes

t C

hic

ago,

111.

46

2

66

0

780

91

9

1,0

10

1,1

00

Lat

41°5

4'3

9",

lo

ng 8

8°1

0'4

4",

in

SE

1/4N

W1/

4 sec.3

5,

T.4

0

N.

, R

.9 E

.,

Du

Pag

e C

ounty

.

220

*0

55

39

95

0

Kle

in

Cre

ek at

Caro

l S

tream

, 111.

187

30

3

39

5

529

64

2

76

8L

at

41°5

4'2

4",

lo

ng 88°0

8'3

2",

in

N

E1/

4SW

1/4

sec.3

1,

T.4

0

N.

, R

. 10

E

.,

Du

Pag

e C

ounty

.

221

*05540030

Wes

t B

ranch

D

u P

age

Riv

er

at

Wes

t C

hic

ago,

11

1.

731

1,0

30

1,2

20

1,4

50

1,6

10

1,7

60

Lat

41°5

1'4

1",

lo

ng 8

8°1

1'3

3",

in

N

W1/

4SE

1/4

sec.

15,

T.3

9

N.

, R

.9 E

.,

Du

Pag

e C

ounty

.

22

2

*0

55

40

06

0

Kre

ss

Cre

ek at

Wes

t C

hic

ago,

111.

264

37

5

45

0

545

61

6

68

7L

at

41°5

1'2

3",

lo

ng 8

8°1

2'1

5",

in

N

W1/

4NW

1/4

sec.2

2,

T.3

9

N.

, R

.9

E.,

D

u P

age

County

.

22

3

*0

55

40

08

0

Spri

ng

Bro

ok

at

Whea

ton,

111.

152

220

27

0

33

8

392

44

9L

at

41 °

51*02",

lo

ng 88°0

6'5

3",

in

N

E1/

4SE

1/4

sec.2

0,

T.3

9

N.

, R

.10

E

.,

Du

Pag

e C

ounty

.

22

4

*0

55

40

09

5

Wes

t B

ranch

D

u P

age

Riv

er

near

Warr

envil

le,

11

1L

at

41°4

9'2

2",

lo

ng 8

8°1

0'2

3",

in

SW

1/4N

E1/4

sec.3

5,

T.3

9

N.,

R.9

E

.,

Du

Pag

e C

ounty

.

22

5

05

54

01

10

F

err

y

Cre

ek at

Warr

envil

le,

111.

Lat

41°4

9I1

3",

lo

ng 88°1

1'3

5",

in

SW

1/4N

E1/

4 se

c.3

4

T.3

9

N.,

R

.9 E

.,

Du

Pag

e C

ounty

.

22

6

05

54

01

40

E

ast

B

ranch

D

u P

age

Riv

er

near

Blo

om

ing

dale

, 1

11

L

at

41

»5

6'0

6",

lo

ng 8

8«

03

'29

",

in

SW1/

4SE

1/4

sec.2

3

T.4

0

N.,

R.1

0

E.,

D

u P

age

County

.

22

7

*05

54

01

50

E

ast

B

ranch

D

u P

age

Riv

er

at

Gle

n E

llyn,

11

1.

Lat

41«53'2

4",

lo

ng 88°0

3'0

1",

in

SW1/

4SW

1/4

sec.

1,

T.3

9

N.,

R.1

0

E.,

D

u P

age

Co

un

ty.

228

*0

55

40

16

0

East

B

ranch

D

u P

age

Riv

er

near

Dow

ner

s G

rove,

1

11

. L

at

41»49'5

4",

lo

ng 88°0

2'5

1",

in

S

E1/

4SW

l/4 sec.2

5,

T.3

9

N.,

R.1

0

E.,

D

u P

age

County

.

[11.

ec.35,

ec.34,

111.

ec.2

3,

1,140

___ 869888 59 95

63

1,570

128

165

134

102

166

111

1,830

___

158

209

168

133

213

146

2,150

197

264

212

175

273

192

2,370

228

302

245

206

317

227

2,590

259

340

279

238

359

261

24

2

59

7

39

8508

961

1,2

20

649

1,5

70

75

5

1,8

50

861

2,1

30

Table 1. T-year peak discharges at gaging stations Continued

Map

Station

No.

No.

Station name and location

229

*05540190

St.

Joseph Creek at Belmont, 111.

344

517

628

761

855

945

Lat 41°47'31", long 88°02'15", in NW1/4SE1/4 se

c. 12,

T.38 N.,

R.10 E. ,

Du Page County.

230

*05540240

Prentiss Creek near Li

sle,

111.

191

303

388

509

609

716

Lat 41°46'17", long 88°04'11", in SW1/4SW1/4 se

c. 14,

T.38 N.,

R.10 E.

, Du

Page County.

231

*05540500

Du Page River at

Shorewood, 111.

3,670

5,790

7,290

9,280

10,8

00

12,4

00Lat 41°31'20", long 88° 11

'35"

, in SE

1/4S

W1/4

se

c. 10,

T.35 N.

, R.9 E.,

Will County.

232

05541750

Mazon River tributary near Gardner, 111.

Lat 41009*36", long 88°20'35", in SE

1/4

sec. 18,

T.31 N.

, R.8 E-,

Grundy County.

233

05542000

Mazon River near Coal City, 111.

Lat 41° 17'10",

long 88°21'35", in SW1/4SW1/4 sec.31,

T.33 N.,

R.8 E.,

Grundy County.

234

*05543500

Illinois River at Marseilles, 11

1.Lat 41°19'40", long 88°43

110",

in SE

1/4S

W1/4

se

c. 13,

T.33 N.

, R.4

E.,

La Salle County.

235

05546500

Fox River at Wilmot, Wis.

Lat 42°30*40", long 88°10'45", in

SW

l/4

sec.30,

T.1 N.

, R.20 E.

, Kenosha County.

236

05548150

North Branch Nippersink Creek tributary near

near Genoa City,

Wis.

Lat 42°30'15", long 88°23'01", in E1/2 sec.32,

T.1 N.

, R.18 E.,

Walworth County.

237

*05548280

Nippersink Creek near Spring Grove, 111.

Lat 42°26'37", long 88°14'51", in NE

l/4N

Wl/4 sec.25,

T.46 N.

, R.8

E.,

McHenry County.

238

*05549000

Boone Creek near McHenry, 11

1.Lat 42

° 19

'15"

, long 88° 18

'45"

, in NW1/4SW1/4 sec.4,

T.44 N.

, R.8

E.,

McHenry County.

239

05549700

Mutton Creek at Island Lake,

111.

Lat 42°17'05", long 88° 10*47",

in NE

1/4N

E1/4

se

c. 21,

T.44 N.

, R.9 E.

, Lake County.

107

176

114

8,630

5,520

8,410

43,600

2,620

1,630

2,580

175

237

182

1,27

0

130 79

134

84

145

295

158

13,800

8,930

13,500

61,400

3,880

2,450

3,780

238

396

258

1,920

201

159

219

169

166

374

186

17,000

11,200

16,600

72,600

4,750

2,940

4,590

277

502

308

2,320

246

229

274

238

188

472

218

20,600

14,1

00

20,000

86,000

5,890

3,510

5,620

321

632

368

2,770

300

335

339

336

202

542

240

23,000

16,1

00

22,300

95,500

6,760

3,890

6,410

352

724

410

3,070

337

428

385

416

215

612

260

25,100

18,2

00

24,400

105,000

7,660

4,240

7,190

380

815

450

3,340

372

531

428

501

Tab

le 1.

T-y

ear

pea

k d

isch

arg

es

at

gag

ing st

ati

on

s C

on

tin

ued

00

Map

No.

240

241

242

243

244

245

246

247

248

249

250

Station

No.

*05549850

05549900

*05550000

05550300

*05550430

05550450

*0 5550470

*05550500

05551030

05551050

05551060

Stat

ion

name

and

loca

tion

Flin

t Cr

eek

near Fo

x Ri

ver

Grove, 11

1.Lat 42°12'40", lo

ng 88°10'23", in

NW1/4

sec.

15,

T.43 N.

, R.9

E.,

Lake

Co

unty

.

Fox

Rive

r tributary

near

Gary,

111.

Lat 42

° 11

'48

", long 88°15'54", in NW1/4NE1/4 se

c. 23,

T.43 N.

, R.8 E.

, McHenry County.

Fox River at Algonquin, 111.

Lat 42°09'59", long 88°17'25", in NE1/4NW1/4 sec. 34,

T.43 N.

, R.8 E.

, McHenry County.

Tyler Creek at Elgin, 111.

Lat 42°03'31", long 88°18'14", in SE1/4SE1/4 se

c. 3,

T.41 N.

, R.8

E.,

Kane County.

East Branch Poplar Creek near Palatine, 11

1.Lat 42»04'02", long 88°06'41", in SW

1/4S

E1/4

sec.31,

T.42 N.

, R.10 E.

, Cook County.

Poplar Creek near Ontarioville, 11

1.Lat 42°02'48", long 88°09'20", in NE1/4NW1/4 se

c. 13,

__ T.

.41 N.,

R.9 E.

, Cook County,

Poplar Creek tributary near Bartlett, 111.

Lat 42°01'28", long 88° 12' 10", in SE

1/4N

E1/4

sec.21,

T.41 N.

, R.9 E. ,

Cook County.

Poplar Creek at Elgin, 111.

Lat 42°01'35", long 88°15'20", in SE1/4NW1/4 sec. 19,

T.41 N.

, R.9 E.

, Cook County.

Brews ter Creek at Valley View, 111.

Lat 41°58'22", long 88°16'50", in SW

l/4SWl/4

sec.

1 ,

T.40 N. ,

R.8 E.

, Kane Co

unty

.

Norton Creek near Wayne, 111.

Lat 41°56'54", long 88°16'17", in NW1/4SE1/4 sec. 13,

T.40 N.

, R.8

E.,

Kane County.

Norton Creek near St.

Charles, 111.

Lat 41°56'42", long 88°18'22", in SW

1/4S

E1/4

se

c. 15,

T.40 N.

, R.8

E.,

Kane County.

*> 247

12 12 12

3,190

334

516

356 85

210

297

2.21

163

374

234

248

236

95 138

100

123

209

132

«s 308

_ .

26

22 25

4,450

404

855

456

124

290

498

321

251

.

550

410

414

411

206

231

211

222

350

244

o,. 347

___ 38 29 36

5,240

___

442

1,080

521

153

_

342

632

389

315

_

668

_-_

538

525

536

314

292

308

308

443

337

Q25 39

6

57 38 52

6,160

483

1,360

600

192

404

798

475

403

815

.

706

661

697

499

366

458

439

557

470

050 43

2 72 45 64

6,810

511

1,55

065

3

223

449

916

537

472

_

924

___

836

759

817

678

419

589

556

640

579

0,00 467

88 51 78

7,430

536

1,75

0703

255

493

1,030

597

546

_

1,03

0

966

853

938

899

470

740

690

719

700

Table 1. T-year peak discharges at gaging stations Continued

Map

No.

251

252

253

254

255

256

257

258

259

260

261

Station

No.

05551200

05551520

*05551530

05551620

05551650

05551700

05551800

05551900

05551930

*05552500

05554000

Station name an

d location

Person Creek near St.

Charles, 11

1.Lat 41°56

fOO"

, long 8802

0f30"

, in NEl/jSEl/j se

c. 20,

T.40 N.

, R.8

E. ,

Kane County.

Indian Creek near North Aurora,

111.

Lat 41°48'50

11, long 88°16'26", in SE1/4SW1/4 sec. 36,

T.39 N.

, R.8

E.,

Kane County.

Indian Creek at Aurora, 111.

Lat 41°45'59", long 88°18'24", in NW

1/4N

El/4

sec. 22,

T.38 N.

, R.8

E. ,

Kane County.

Blackberry Creek near Kaneville, 111.

Lat 41°48

I17", long 88°27'34", in SW1/4NEV4

sec.

5,

T.38 N.

, R.7

E. ,

Kane Co

unty

.

Lake Run

tributary near Batavia, 111.

Lat 41°50'45", long 88°24'20", near center of

sec. 23, T.39 N.

, R.7

E. ,

Kane County.

Blackberry Creek near Yorkville, 111.

Lat 41°40

I18",

long 88°26'29", in SE1/4NW1/4 sec. 21,

T.37 N.

, R.7 E. ,

Kendall County.

Fox River tributary No.

2 near Fox, 11

1.Lat 41°36'28", long 88°28'43", in NE

1/4S

W1/4

sec. 7,

T.36 N.,

R.7

E.,

Kendall County.

East Branch Big Rock Creek near Big Rock, 11

1.Lat 41°46'04", long 88°34'11", in NE1/4SE1/4 se

c. 17,

T.38 N.

, R.6

E.,

Kane County.

Welch Creek near Big Ro

ck,

111.

Lat 41°45'36", long 88°30'38", in SE1/4NE1/4 se

c. 23,

T.38 N.

, R.6

E.,

Kane County.

Fox River at Da

yton

, 111.

Lat 41°23'12", long 88°47'26", in SW1/4SE1/4 se

c. 29,

T.34 N.,

R.4

E.,

La Salle County.

North Fork Vermilion River near Charlotte, 11

1.Lat 40°50

108"

, long 88°17'58", in SE1/4SE1/4 se

c. 4,

T.27 N.

, R.8

E.,

Livingston County.

Q2 931

766

910

132

119

131

527

428

366

418 50 89 55

687

643

682 66 54 64

635

436

600

319

329

321

12,2

00

2,290

3,030

2,330

Qs 1,470

1,280

1,450

217

200

214

659

530

612

543

116

154

124

1,130

1,04

01,120

164

99

148

948

719

895

459

548

474

18,8

00

3,560

4,940

3,650

QIO

1,81

01,

630

1,780

277

254

272

732

589

776

622

181

199

186

1,420

1,310

1,41

0

257

132

220

1, 160

908

1,10

0

548

692

575

23,400

4,370

6,240

4,500

225

2,190

2,060

2,170

356

320

348

810

655

982

718

292

255

280

1,780

1,620

1,760

407

174

329

1,44

01,

140

1,35

0

658

871

701

29,300

5,310

7,850

5,520

Qso

2,450

2,370

2,44

0

416

367

405

860

700

1,130

785

400

296

362

2,040

1,850

2,010

542

206

422

1,640

1,310

1,54

0

735

1,000

793

33,800

5,960

9,040

6,240

QIOO

2,700

2,670

2,700

478

413

461

905

741

1,27

0849

531

337

455

2,280

2,070

2,240

697

238

525

1,850

1,47

01,

730

811

1,120

881

38,300

6,560

10,2

006,900

Tabl

e 1. T-year peak discharges at gaging stations Continued

Map

N

o.

262

263

26

4

26

5

266

267

268

26

9

270

271

272

Sta

tion

No.

05

55

45

00

05554600

05555000

05

55

53

00

05

55

54

00

05555775

05556500

05557000

05

55

71

00

05557500

05558000

Sta

tion

nam

e an

d

locati

on

Verm

ilio

n

Riv

er

at

Po

nti

ac,

111.

Lat

40

°52

'40

",

long

88

e38'1

0M

, in

SW

1/&

sec. 2

2,

T.2

8 N

.,

R.5

E

.,

Liv

ing

s to

n

County

.

Hud

C

reek

tr

ibuta

ry

near

Od

ell

, 111.

Lat

41

«0

0t5

0",

lo

ng

88«38'3

6M

, in

N

W1/

4 sec. 3

,T

.29

N

. ,

R.5

E

.,

Liv

ing

s to

n

Co

un

ty.

Verm

ilio

n

Riv

er

at

Str

eato

r,

111.

Lat

41«05'3

5",

lo

ng

88

«5

0'0

5M

, in

SE

1/4

sec.

2,

T.3

0

N.

, R

.3

E.

, L

ivin

gst

on

C

ounty

.

Verm

ilio

n

Riv

er

near

Leonore

, 1

11

.L

at

41°1

2'3

0",

lo

ng

88

e55'5

2M

, in

SW

1/JS

W1/

4 se

c. 30,

T.3

1

N.

, R

.2

E.,

La

Sall

e

Co

un

ty.

Verm

ilio

n

Riv

er

trib

uta

ry at

Lo

well

, 111.

Lat

41

»1

4'3

0",

lo

ng

89e0

0'3

5",

in

SE1/

4 se

c.

17,

T.3

2 N

.,

R.2

E

.,

La

Sall

e

County

.

Verm

ilio

n

Cre

ek tr

ibuta

ry at

Meri

den

, 111.

Lat

41°3

4'0

8",

long

89e0

1'2

8M

, o

n li

ne

bet

wee

n sees.

20

an

d

29,

T.3

6

N.

, R

.2

E.

, L

a S

all

e

County

.

Big

B

ure

au

Cre

ek at

Pri

nceto

n,

111.

Lat

41*2

1 '5

5",

long

89

*2

9 '5

5",

in

SW

l/jS

El/

j se

c.

18,

T.1

6

N.,

R.9

E

. ,

Bure

au

County

.

Wes

t B

ure

au

Cre

ek at

Wyan

et,

111.

Lat

41«21'5

4",

lo

ng

89

e34'0

8M

, in

N

El/fc

se

c. 2

1,

T.1

6

N.

, R

.8

E.,

B

ure

au

Co

un

ty.

Wes

t B

ure

au

Cre

ek tr

ibuta

ry

near

Wyan

et,

11

1.

Lat

41"

18' 4

0",

lo

ng

89«35'2

0M

, in

SE

1/4

sec. 5

,T

.15

N

. ,

R.8

E

. ,

Bure

au

Co

un

ty.

East

B

ure

au C

reek

n

ear

Bure

au,

111.

Lat

41e2

0'0

6M

, lo

ng

89«22'5

3M

, in

N

W1/

4NE1

/4 se

c.

31,

T.1

6

N.

, R

. 10

E.,

Bure

au

Co

un

ty.

Big

B

ure

au

Cre

ek at

Bure

au,

111.

Lat

41e

16M

OM

, lo

ng

89«23'0

0M

, in

S

El/4

sw1/

4 sec.

18,

T.1

5

N.

, R

.10

E.

, B

ure

au

Co

un

ty.

Q2 5,3

10

4,0

40

5,2

20 49 43 48

7,8

20

7,0

60

7,7

10

11,7

00

8,2

00

11

,50

0 25 35 27 42

45

43

4,2

50

3,8

80

4,2

20

2,7

70

2,4

70

2,7

50 81 95 83

2,3

70

3,2

30

2,4

20

8,0

40

8,0

70

8,0

50

QS

8,2

40

6,3

00

8,0

90 90 79 88

12,4

00

11

,00

01

2,1

00

19

,40

012,9

00

18,9

00 68

64 67 69 80 71

7,3

30

6,4

40

7,2

60

5,0

00

4,1

60

4,9

20

158

177

162

4,1

20

5,5

00

4,2

20

11

,70

013,3

00

12

,10

0

QIO

10,2

00

7,7

40

9,9

80

120

105

116

15,4

00

13,6

00

15,0

00

24,5

00

15,9

00

23

,90

0

115

85

105

88

104

92

9,2

90

8,1

80

9,2

00

6,7

30

5,3

20

6,5

60

222

23

722

6

5,3

70

7,1

00

5,5

10

14,1

00

16,9

00

14,9

00

Q25

12,6

00

9,5

10

12

,30

0

158

139

153

19

,20

01

6,8

00

18

,60

0

31,2

00

19

,60

030,1

00

202

113

168

112

134

118

11

,60

010,4

00

11

,50

0

9,1

40

6,8

10

8,8

50

317

318

317

7,0

00

9,1

40

7,1

90

17

,00

021,6

00

18,4

00

Qso

14,4

00

10

,80

01

4,0

00

186

165

180

21,9

00

19,0

00

21,2

00

36,1

00

22,2

00

34,7

00

292

133

22

6

131

157

138

13

,10

012,0

00

13,0

00

11,1

00

7,9

30

10,7

00

396

379

392

8,2

20

10

,70

08,4

50

19,1

00

24,9

00

21,0

00

Cioo

16

,10

01

2,0

00

15

,60

0

213

191

207

24,6

00

21,2

00

23,7

00

40

,80

024,8

00

39,1

00

40

615

42

96

149

179

158

14

,50

01

3,6

00

14

,40

0

13

,20

09,0

20

12

,60

0

48

34

43

47

2

9,4

40

12

,20

09,7

10

21,2

00

28,3

00

23,5

00

Table

1. T-year peak discharges at gaging stations Continued

Map

No.

273

274

275

276

277

Station

Station name and location

NO .

05558050

Coffee Creek tributary near Florid,

111.

Lat 41°14'25", long 89°18'00", in SE

1/4

sec. 14,

T.32 N.

, R.2

W. ,

Putnam County.

05558075

Coffee Creek tributary near Hennepin, 111.

Lat 41»14'35", long 89°18'25", near center of

sec.

14, T.32 N.

, R.2

W. ,

Putnam County.

05558500

Crow Creek (West) near Henry, 11

1.Lat 41°09'00", long 89°25'00", in SW

l/4SEl/4

sec. 36,

T.14 N.

, R.9

E.,

Putnam County.

05559000

Gimlet Creek at Sparland, 11

1.Lat 41*0 1*3

5",

long 89°26'20", in SE

1/4N

W1/4

se

c. 14,

T.12 N.

, R.9

E. ,

Marshall County.

05559500

Crow Creek near Washburn, 11

1.Lat 40°57'15", long 89°18'30", in SW

1/&

sec. 23,

T.29 N.

, R.

2 W. ,

Marshall County.

Q2

19 22 19 60 82 63

1,510

1,860

1,540

849

764

839

2,190

1,940

2,170

Qs

41 42 41 116

155

124

2,680

3,160

2,740

1,320

1,390

1,330

3,360

3,300

3,350

QIO 61 57 59

166

209

177

3,610

4,050

3,680

1,63

01,850

1,650

4,160

4,280

4,180

Q25

89 77 86

245

282

255

4,990

5,190

5,020

1,990

2,460

2,050

5,200

5,530

5,250

Qso 11

4 94 107

316

339

323

6,140

6,040

6,120

2,240

2,930

2,330

5,980

6,490

6,050

QIOO 14

011

013

0

400

396

399

7,410

6,890

7,310

2,480

3,410

2,600

6,780

7,430

6,870

278

*055

6000

0 Illinois River

at Pe

oria

, 11

1.

38,1

00

48,6

00

54,400

60,700

64,8

00

68,500

Lat 40

°42

I08"

, lo

ng 89°33'52", in

SW1/4N

Wl/4 sec.2,

T.8 N.

, R.8

E.,

Peoria Co

unty

.

27

9

*05560500

Far

m

Cre

ek

at

Fa

rmd

ale

, 111.

570

713

803

913

993

1,0

70

La

t 4

0°3

9'5

5"

, lo

ng

89°3

0'1

5"

, in

N

E1/

4SE

1/4

sec.

36,

T.2

6 N

.,

R.4

W

., T

aze

wel

l C

ou

nty

.

280

05

56

10

00

A

cker

man

C

reek

at

Far

md

ale,

111.

656

1,3

90

2,0

00

2,9

10

3,6

60

4,4

90

Lat

40

°39

'43

",

lon

g

89°3

0'1

3"

, in

SE

1/4S

E1/

4 se

c.3

6,

957

1,7

70

2,4

00

3,2

50

3,9

30

4,6

10

T.2

6

N.,

R

.4

W.,

Ta

zew

ell

Cou

nty

. 69

0 1,4

40

2,0

70

2,9

70

3,7

20

4,5

10

281

*055

6150

0 F

on

du

lac

Cre

ek

nea

r E

ast

P

eoria

, 111.

252

363

439

538

612

688

Lat

40

°40

'38

",

lon

g

89°3

1I5

2"

, on

li

ne

bet

wee

n

SWl/j

an

d

SE1/

4 se

c.2

6,

T.2

6 N

.,

R.4

W

., T

aze

wel

l C

ou

nty

.

282

*055

6200

0 F

arm

C

reek

at

East

P

eori

a,

111.

3,4

90

7,0

10

10

,10

0

14

,70

0

18

,80

0

23,3

00

Lat

40

°40

'04

",

lon

g

89

°34

'40

",

in

SW1/

4NW

1/4

sec.3

3,

T.26 N.

, R.

4 W.

, Tazewell Co

unty

.

283

05563000

Kickpaoo Creek near Kickapoo, 111.

7,380

13,700

18,800

26,100

32,100

38,500

Lat 40°48'00", long 89°48'00", in SW1/4SE1/4 sec.34,

4,370

7,500

9,710

12,600

14,800

16,900

T.10 N., R.6 E.

, Peoria County.

7,060

12,900

17,300

23,500

28,500

33,900

Table

1. T-year peak discharges at ga

ging

stations Continued

Ui

Map

No.

284

285

286

287

288

289

290

291

292

293

294

Station

No.

05563100

05563500

05564400

05564500

05565000

05566000

05566500

05567000

05567500

05567800

05568000

Stat

ion

name

and location

Kickapoo Cr

eek

trib

utar

y ne

ar Ki

ckap

oo,

111.

Lat 40

°47'

40",

long 89°46'30", in NW

1/4

sec. 1

,T.9 N.

, R.

6 E.

, Peoria Co

unty

.

Kickapoo Cr

eek

at Pe

oria

, 11

1.Lat 40»40

>52"

, long 89»39'19", in

NE1/4NW1/4 sec. 13,

T.8

N. ,

R.

7 E.

, Peoria Co

unty

.

Money Cr

eek

near

To

wand

a, 111.

Lat 40°36'19", lo

ng 88°53

t56",

in SW

1/4S

W1/4

se

c. 20,

T.25 N.

, R.3

E.,

McLean Co

unty

.

Money Cr

eek

abov

e Lake Bloomington, 111.

Lat 40«37

>13"

, lo

ng 88°54'59", in SE1/4SW1/4 se

c. 18,

T.25 N.

, R.3

E. ,

McLean Co

unty

.

Hick

ory

Creek

above

Lake

Bl

oomi

ngto

n, 111.

Lat 40°38'15", long 88

e57'

00",

in

SW1/4SE1/4 sec. 11,

T.25 N. ,

R.2

E.,

McLe

an Co

unty

.

East Branch Pa

nthe

r Creek

near

Gridley, 111.

Lat 40°46'00", long 88

°54'

35",

between sees. 29

an

d__ 10^

T.27 N«,

R.3

E. ,

Livingston Co

unty

.

East Branch Pa

nthe

r Creek

at El Pa

so,

111.

Lat 40

°45'

15",

lo

ng 89

e00'

20",

on li

ne be

twee

n sees.

32 and 33

, T.

27 N.

, R.2

E. ,

Woodford Co

unty

.

Pant

her

Cree

k ne

ar El Paso,

111.

Lat 40

°46'

05",

long 89

°04'

30",

in ce

nter

of se

c. 26,

T.27 N. ,

R.

1 E. ,

Woodford Co

unty

.

Mackinaw River

near Congerville, 11

1.Lat 40°37'25", lo

ng 89

°14'

30",

in

NE

1/4S

W1/4

se

c. 17,

T.25 N. ,

R. 1

W.

, Woodford Co

unty

.

Indian Creek

tributary

near

Ho

peda

le,

111.

Lat 40°24

135",

long

89

°27'

45",

in NW

1/4N

E1/4

se

c. 32,

T.23 N.,

R.3

W.,

Tazewell Co

unty

.

Mackinaw Ri

ver

near

Gr

een

Vall

ey,

111.

Lat 40

«26

>43"

, long 89<>39"\0",

in SE

1/4N

W1/4

se

c. 15,

T.23 N. ,

R.5

W. ,

Tazewell Co

unty

.

Q2

27 31 28

7,690

7,500

7,670

885

1,040

902

946

951

948

521

384

499

152

262

162

571

592

573

2,220

1,390

2,140

8,510

5,410

8,280

192

124

171

8,070

8,430

8,090

Qs

64 59 63

13,000

12,700

13,000

1,380

1,79

01,440

1,520

1,610

1,540

1,000

675

942

284

461

314

1,100

1,00

01,

080

4,080

2,340

3,850

14,8

008,850

14,100

331

230

298

14,900

13,900

14,800

QIO 99 79 94

17,5

0016,300

17,3

00

1,73

02,320

1,82

0

1,970

2,080

1,990

1,350

885

1,250

402

604

446

1,580

1,29

01,530

5,560

3,010

5,150

20,100

11,200

18,7

00

432

310

388

21,000

17,8

0020,700

225 15

5106

141

24,500

20,900

23,800

2,190

3,010

2,330

2,590

2,690

2,610

1,79

01,160

1,640

592

791

643

2,390

1,660

2,210

7,690

3,860

6,950

28,100

14,300

25,300

562

418

507

31,000

22,800

29,800

Qso 207

127

182

30,700

24,400

29,300

2,540

3,520

2,710

3,090

3,130

3,100

2,120

1,370

1,940

764

931

811

3,150

1,94

02,820

9,440

4,500

8,410

35,000

16,5

0031,000

662

501

600

40,200

26,400

38,000

Cioo 26

7149

229

37,800

28,000

35,600

2,880

4,050

3,100

3,640

3,580

3,620

2,430

1,58

02,220

971

1,07

01,

000

4,060

2,210

3,520

11,300

5,140

9,950

42,900

18,700

37,200

762

586

693

51,200

30,100

47,500

Table 1. T-year peak discharges at gaging stations Continued

to

Map

N

o.

295

29

6

297

298

299

300

301

302

303

304

Sta

tion

No.

*0 5

568500

*0

55

68

65

0

05568800

05

56

88

50

05

56

95

00

05569825

05

57

00

00

*0 5

57

03

50

*0

55

70

36

0

05

57

03

70

Sta

tion

na

me

and

lo

cati

on

Illi

no

is

Riv

er

at

Kin

gst

on

M

ines

, 111.

Lat

40°3

3'1

0"

/ lo

ng

89°4

6'4

0",

in

S

E1/

4SE

1/4

sec.

26,

T.7

N

. ,

R.6

E

. ,

Peori

a

County

.

Duc

k C

reek near

Can

ton,

111.

Lat

40°3

2'4

5",

lo

ng S

g-s

g'S

S",

in

E

1/2

sec.

36

,T

.7

N.

, R

.4 E

.,

Fult

on C

ounty

.

India

n

Cre

ek

near

Wyo

min

g,

111.

Lat

41

°OV

06

",

long 8

9»

50

'07

",

in

SE

1/4S

E1/

4 se

c.

17

,T

.12

N

. ,

R.6

E

. ,

Sta

rk

County

.

Form

an

Cre

ek tr

ibuta

ry

near

Vic

tori

a,

11

1.

Lat

41°0

2'3

0",

lo

ng

90°0

9I2

0",

in

SW

V4N

W1/

4 se

c.

10

,T

.12

N

. ,

R.3

E

.,

Kno

x C

ou

nty

.

Spoon

Riv

er

at

Lo

nd

on

M

ills

, 111.

Lat

40

°42

'32

",

long

90»16'5

3",

in

SW

1/4N

E1/

4 se

c. 4

,T

.8

N.

, R

.2

E.,

F

ult

on

County

.

Cedar

Cre

ek tr

ibuta

ry at

St.

A

ugust

ine,

111.

Lat

40°4

3I2

0",

lo

ng 90°2

4'4

0",

in

E

1/2

sec.

32,

T.9

N

.,

R.

1 E

.,

Kno

x C

ou

nty

.

Spoon

Riv

er

at

Sevil

le,

111.

Lat

40°2

9t0

8",

lo

ng

90

-20

'34",

in

NE1

/4N

W1/

4 se

c.

24

,T

.6 N

.,

R. 1

E

.,

Fult

on C

ounty

.

Big

C

reek

at

St.

D

avid

, 1

11

.L

at

40029'5

1",

long

gO^O

S1^

",

in

SE

1/4S

E1/

4 se

c.

16,

T.6

N

. ,

R.4

E

.,

Fult

on

County

.

Evel

yn

Bra

nch

n

ear

Bry

ant,

1

11

.L

at

40°2

9'1

5",

lo

ng

9000

6'0

8n,

in

NW

V4S

W1/

4 se

c.

19,

T.6

N

. ,

R.4

E

.,

Fult

on

County

.

Big

C

reek

near

Bry

ant,

1

11

.L

at

4002

7'3

2",

lon

g

90

°08

'00

",

in cente

r of

sec.

35,

T.6

N

.,

R.3

E

. ,

Fu

lto

n

County

.

Q2

47,6

00

67

1,5

10

1,4

00

1,5

00

104

138

111

9,9

30

8,8

50

9,8

60

385

339

379

12,6

00

11,6

00

12,6

00

872

69

818

1,3

70

910

Qs

63,8

00

103

2,4

20

2,4

10

2,4

20

195

25

921

0

15,5

00

14,7

00

15

,30

0

61

762

16

18

19

,30

01

9,1

00

19,3

00

1,2

40

116

1,0

60

2,4

20

1,2

80

do

73,5

00

12

9

3,1

10

3,1

40

3,1

20

26

635

02

88

19

,70

01

8,8

00

19,6

00

79

68

34

80

5

23,9

00

24,3

00

23,9

00

1,5

00

149

1,2

00

3,1

90

1,5

20

Q25

84,7

00

163

4,1

00

4,0

80

4,1

00

366

47

439

6

25,8

00

24,1

00

25,5

00

1,0

50

1,1

20

1,0

70

29,8

00

31,1

00

29,9

00

1,8

20

189

1,3

50

4,2

10

1,8

40

Qso

92,4

00

189

4,9

20

4,8

10

4,8

90

44

65

70

48

3

30,9

00

28,1

00

30

,40

0

1,2

60

1,3

40

1,2

80

34,2

00

36,2

00

34

,40

0

2,0

70

219

1,4

50

4,9

90

2,0

60

QIOO

99,6

00

21

6

5,8

10

5,5

20

5,7

30

530

66

857

1

36,5

00

32,0

00

35,6

00

1,4

90

1,5

60

1,5

10

38,7

00

41,2

00

38

,90

0

2,3

30

247

1,5

40

5,7

80

2,2

70

305

*05570380

Slug Run near Br

yant

, 11

1.Lat 40°28

I24",

long 90»08'37", in

SE1/4NE1/4 sec.27,

T.6 N.

, R.3

E.,

Fulton County.

142

239

304

382

438

491

Tabl

e 1. T-year peak discharges at ga

ging

stations Continued

Ul

Map

N

o.

306

30

7

30

8

309

310

311

312

31

3

314

31

5

316

Sta

tion

No.

05571000

05572000

05572100

05572450

05

57

25

00

05

57

40

00

05

57

45

00

05

57

55

00

05

57

58

00

*0

55

76

00

0

05576500

Sta

tion

nam

e an

d lo

cati

on

San

gam

on

Riv

er

at

Mah

om

et,

111.

Lat

40

°ir

30

",

long 8

8°2

4'0

0",

in

N

E1/

4SW

1/4

sec.

15,

T.2

0

N.

, R

. 7

E.

, C

ham

pai

gn

County

.

San

gam

on

Riv

er

at

Monti

cell

o,

111.

Lat

40°0

1'5

1",

lo

ng

88°3

5'2

0",

in

N

El/

jSW

l/j

sec.

12,

T.1

8

N.

, R

.5

E.

, P

iatt

C

ounty

.

Wil

dcat

Cre

ek

trib

uta

ry

near

Mo

nti

cell

o,

11

1.

Lat

40°0

1'3

7",

long

88°3

8'2

4",

in

SW

1/4S

E1/

4 se

c. 9,

T.1

8

N.,

R.5

E

.,

Pia

tt

County

.

Fri

en

ds

Cre

ek

at

Arg

enta

, 1

11

.L

at

39

°59

'21

",

long 8

8°4

8'1

8",

in

SE

1/4N

E1/

4 se

c.

25,

T.1

8

N.

, R

.3

E.,

M

acon

C

ounty

.

San

gam

on

Riv

er

near

Oak

ley

, 111.

Lat

39°5

5'0

9",

lo

ng 88°4

8'0

9",

in

SE

1/4N

E1/

4 se

c. 24,

T.1

7

N.

, R

.3 E

.,

Mac

on

Co

un

ty.

South

F

ork

S

angam

on R

iver

near

No

ko

mis

, 111.

Lat

39»21'1

2",

lo

ng 8

9»

15

'05

",

in

NE

1/4S

E1/

4 se

c.

36,

-T-^

ll

N-,

R

.2

W»,

C

hri

sti

an

Co

un

ty.

Fla

t B

ranch

n

ear

Taylo

rvil

le,

11

1.

Lat

39°3

3'1

4",

lo

ng

89

° 15

* 12",

in

S

E1/

4SE

1/4

sec.

24,

T.1

3

N.,

R.2

W

., C

hri

sti

an

County

.

South

F

ork

S

anga

mon

R

iver

at

Kin

caid

, 111.

Lat

39°3

4'4

4",

lo

ng 89°2

3'3

1",

in

SW

l/4N

El/

4 se

c.

14

,T

.13

N

.,

R.3

W

., C

hri

sti

an

County

.

Hors

e C

reek

at

Paw

nee

, 111.

Lat

39

°34

'56

",

long

89

«3

4'2

0",

in

N

E1/

4NE

1/4

sec.

18

,T

.13

N

. ,

R.4

W

. ,

San

gam

on

Co

un

ty.

So

uth

F

ork

S

angam

on

R

iver

near

Rochest

er,

1

11

.L

at

39°4

4'3

2",

lo

ng 89°3

4'0

2",

in

N

E1/4

NW

1/4

sec. 20,

T.1

5

N.

, R

.4

W.,

San

gam

on

County

.

San

gam

on

Riv

er

at

Riv

ert

on

, 111.

Lat

39°5

0'3

4",

lo

ng

89°3

2I5

2",

in

N

Wl/

jNE

l/j

sec.

16,

T.1

6

N.,

R.4

W

. ,

San

gam

on

County

.

Q2

4,1

30

3,7

30

4,0

90

5,4

20

4,5

60

5,4

00 30 19 28

1,6

30

1,9

50

1,6

80

5,6

50

6,1

00

5,6

90

1,0

00

71

99

68

3,9

90

2,8

60

3,8

80

4,4

80

5,4

80

4,5

20

1,9

20

1,3

70

1,8

20

5,7

20

15

,80

01

2,6

00

15,7

00

Qs

7,0

60

6,2

10

6,9

70

8,9

50

7,5

30

8,8

90 47 36 45

2,7

70

3,3

30

2,8

90

9,2

00

10

,00

09

,33

0

2,0

00

1,3

10

1,8

50

6,6

10

4,7

50

6,4

10

7,9

60

9,1

40

8,0

40

2,9

80

2,3

90

2,8

70

9,7

50

25,2

00

20,5

00

25,0

00

do

9,2

50

7,9

60

9,0

60

11,5

00

9,5

90

11,4

00 58 48 56

3,6

60

4,3

20

3,8

40

11,9

00

12,8

00

12,1

00

2,9

30

1,7

50

2,6

20

8,3

90

6,0

70

8,1

10

10,7

00

11,7

00

10,8

00

3,6

30

3,1

20

3,5

30

12,5

00

31,2

00

26

,00

03

0,9

00

22

5

12,2

00

10,2

00

11,9

00

14,7

00

12,2

00

14

,60

0 71 65 70

4,9

70

5,5

80

5,1

50

15,8

00

16

,30

015,9

00

4,5

00

2,3

50

3,8

40

_

10,6

00

7,7

40

10,2

00

14,6

00

15,0

00

14,6

00

4,4

10

4,0

80

4,3

40

15,8

00

38,2

00

33,0

00

37,9

00

Qso

14

,60

011,9

00

14,1

00

17,2

00

14

,20

017,0

00 80 78 80

6,0

40

6,5

50

6,2

10

18,9

00

18,9

00

18,9

00

6,0

00

2,8

10

4,9

50

12,2

00

8,9

90

11

,70

0

17

,70

017,5

00

17

,70

0

4,9

30

4,8

20

4,9

00

18,3

00

-

43,1

00

38

,30

042,8

00

QIOO

17

,00

01

3,5

00

16

,40

0

19

,70

01

6,1

00

19,5

00 89

91 90

7,2

30

7,5

00

7,3

30

22,3

00

21,5

00

22,1

00

7,8

20

3,2

80

6,2

70

13,8

00

10

,30

01

3,3

00

21,1

00

20,0

00

21,0

00

5,4

20

5,5

50

5,4

50

20,6

00 -

47

,60

043,6

00

47,3

00

Table 1. T-year peak discharges at gaging stations Continued

Map

N

o.

317

318

31

9

32

0

321

322

323

Sta

tion

. S

tati

on

nam

e an

d lo

cati

on

No.

05577500

Spri

ng C

reek

at

Sp

rin

gfi

eld

, 111.

Lat

39°4

8'5

7",

lo

ng

89°4

1'5

7",

in

NW

1/4N

EV

4 se

c. 30,

T.1

6

N.

, R

.5

W.,

S

ang

amo

n

Co

un

ty.

05

57

77

00

S

anga

mon

R

iver

trib

uta

ry at

Andre

w,

11

1.

Lat

39°5

3'4

5",

lo

ng 89°3

8'5

0",

near

cente

r of

sec.

27,

T.1

7

N.,

R

.5

W. ,

San

gam

on

Co

un

ty.

05

57

85

00

S

alt

C

reek

n

ear

Row

el 1

, 111.

Lat

40°0

6'5

4",

lo

ng 8

9°0

2'5

7",

in

NE

1/4S

El/

4

Sec.1

1,

T.1

9 N

.,

R.1

E

.,

De

Wit

t C

ou

nty

.

05579500

Lak

e F

ork

near

Com

land,

111.

Lat

39°5

7'0

0",

long 89°2

3'1

0",

in

SW

l/4 sec.1

,T

.17

N

.,

R.3

W

.,

Logan

C

ou

nty

.

05

57

97

50

K

ickpao

o

Cre

ek tr

ibuta

ry at

Hey

wo

rth

, 111.

Lat

40

°19

'05

",

long 88°5

8'5

5",

in

NW1/4

SW1/

4 se

c. 3

4,

T.2

2 N

.,

R.2

E

. ,

McL

ean

County

.

05580000

Kic

kap

oo

Cre

ek at

Hay

nesv

ille

, 111.

Lat

40

°15

'20

",

lon

g 8

9°0

7'4

0",

on

li

ne

bet

wee

nsees.

19

and

20,

T.2

1

N.

, R

.1

E.

, D

e H

itt

County

.

05

58

05

00

K

ickap

oo

Cre

ek

near

Lin

coln

, 1

11

.L

at

40°1

1'3

0",

lo

ng 89°2

1'4

0",

in

N

E^N

WV

a se

c.

18,

T.2

0 N

.,

R.2

W

.,

Logan

C

ou

nty

.

Q2

1,8

10

2,3

80

1,8

50

21

72

15

21

7

3,7

00

3,3

90

3,6

70

2,0

70

3,5

00

2,1

50

40

9

231

37

2

4,1

30

3,8

00

4,1

10

4,5

20

4,8

60

4,5

40

05

3,6

90

4,1

20

3,7

30

38

84

04

392

7,3

60

5,6

40

7,1

60

4,1

50

5,9

80

4,3

60

74

5

42

06

44

7,7

40

6,5

20

7,5

70

8,3

00

8,3

20

8,3

00

do

5,2

20

5

,38

05

,24

0

51

45

48

521

10

,50

0

7,2

10

10

,10

0

6,1

20

7,7

60

6,3

80

1,0

30

56

086

1

10,9

00

8,4

70

10,5

00

11

,50

010,8

00

11

,40

0

«25

7,4

10

7,0

30

7,3

60

681

74

66

95

15

,40

0

9,2

30

14

,40

0

9,5

10

10

,10

09

,62

0

1,4

50

74

61,1

70

15

,80

01

1,0

00

14

,80

0

16

,40

01

4,1

00

16

,10

0

QSO

9,2

00

8,3

00

9,0

80

80

98

99

83

0

19,7

00

10,7

00

18

,00

0

12,8

00

11,9

00

12,6

00

1,8

10

88

91,4

40

20,1

00

13,0

00

18,6

00

20,7

00

16,6

00

20,0

00

QIOO

11,1

00

9,5

70

10,9

00

94

01

,06

09

66

24,5

00

12,2

00

22,0

00

16,8

00

13

,60

01

6,1

00

2,2

20

1,0

40

1,7

20

25,2

00

14,9

00

22,8

00

25

,50

019,1

00

24

,40

0

324

*05580700

Salt

Creek tributary at Middletown, 11

1.Lat 40

006'00", long 89«34'55", in EV5 sec.18,

T.19 N.,

R.4

W.,

Logan Covmty.

325

*05580950

Sugar Creek near Bloomington, 11

1.Lat 40°28"18", long 89°01'46", in NE1/4NW1/4 sec.7,

T.23 N.

, R.2 E.

, McLean County.

326

05581500

Sugar Creek near Hartsburg, 11

1.Lat 40°13

t20"

, long 89°24'12", in SE1/4SW1/4 sec.35,

T.21 N.,

R.3 W.

, Logan County.

327

05582000

Salt Creek near Greenview, 11

1.Lat 40°08'01", long 89°44'08", in NE

1/4N

E1/4

sec.2,

T.19 N.

, R.6 W.

, Mason County.

122

3,240

299

4,130

456

4,710

696

5,430

899

5,950

1,120

6,480

5,690

5,510

5,680

12,900

8,830

12,600

11,200

9,440

11,000

21,700

14,700

21,000

16,300

12,300

15,600

28,100

18,700

27,000

24,500

16,100

22,800

36,400

24,000

34,800

32,100

18,900

29,200

42,900

27,900

40,800

41,200

21,800

36,600

49,400

31,800

46,900

Table

1. T-year peak discharges at gaging stations Continued

Map

Stat

ion

No.

No.

328

05582200

329

05582500

330

05583000

331

05584400

332

05584450

333

05584500

334

*05584950

335

05585000

336

05585220

337

*05585500

338

05585700

Station name and location

Cabiness Creek tributary near Petersburg, 111.

Lat 40°02'00", long 89°46'35", in NE1/J

sec.

9,

T.18 N. ,

R.6 W.,

Menard County.

Crane Creek near Easton,

111.

Lat 40° 14

*46"

, long 89°51'40", in NE

1/4N

W1/4

se

c. 26,

T.21 N.

, R.7 W.,

Mason County.

Sangamon River near Oakford, 111.

Lat 40°07'25", long 89°59'05", in NWl/jSEl/j se

c. 3,

T.19 N. ,

R.8 W.

, Mason County.

Drowning Fork at Bushnell, 11

1.Lat 4C'33'45", long 90°31'23", in NE1/4SE1/4 sec. 29,

T.7 N.

, R. 1 W., McDonough County.

Wigwam Hollow Creek near Ma comb, 11

1.Lat 40°29'05", long 90°42'25", in SE

1/4S

W1/4

se

c. 23,

T.6 N.

, R.

3 W. ,

McDonough County.

La Moine River at Co

lmar

, 111.

Lat 40°19'45", long 90°53'55", in SE1/4SW1/4 se

c. 18,

T.4 N. ,

R.4 W.,

McDonough County.

West Creek at Mount Sterling, 111.

Lat 39°59'45", long 90°46'05", near center of

sec.

8,

T.1

S.,

R.3

W. ,

Brown County.

La Moine River at Ripley,

111.

Lat 40°01'28", long 90°37'55", in

SW1/4NE1/4 sec. 33,

T.1 N. ,

R.2 W. ,

Brown County.

Indian Creek tributary near Sinclair, 11

1.Lat 39°48'42", long 90°06'15H

, in NW1/4

sec.

27,

T.16 N.,

R.9 W.

, Morgan County.

Illinois River at Meredosia, 111.

Lat 39049'

24",

long 90°34'05", in SE1/4

sec. 21,

T.16 N.

, R.13 W. ,

Morgan County.

Dry Fork tributary near Mount Sterling, 11

1.Lat 39

057

'46"

, long 90°45'35", in SW1/4

sec.

21,

T.1

S.,

R.3

W. ,

Brown Co

unty

.

»2

126

115

124

224

509

239

22,400

23,000

22,400

664

811

679

211

155

197

8,470

8,300

8,450

230

___

8,950

10,200

8,990

392

354

385

62,700

32 38 33

05 31

3214

289

401

861

431

38,200

37,100

38,200

1,270

1,420

1,290

343

301

331

15,200

14,100

15,100

369

14,000

16,900

14,100

724

656

713

86,000

___ 51 73 55

«,. 497

288

438

526

1,100

568

49,000

46,900

48,900

1,740

1,85

01,750

432

415

427

20,400

18,300

20,200

470

17,500

21,600

17,800

971

883

955

99,800

--- 64 100 70

»»

800

386

667

684

1,42

0746

62,200

59,400

62,100

2,390

2,420

2,390

543

574

552

27,600

23,700

27,100

605

___

22,300

27,600

22,800

1,300

1,190

1,270

116,000

80

136

91

050

1,08

0463

867

800

1,650

879

71,800

68,700

71,600

2,900

2,860

2,900

625

700

647

33,300

27,900

32,500

712

26,100

32,100

26,600

1,550

1,430

1,520

126,000

___ 92 164

106

QIOO

1,420

542

1,10

0

914

1,88

01,010

80,900

78,000

80,700

3,440

3,300

3,410

705

832

741

39,300

32,100

38,200

822

29,900

36,600

30,500

1,79

01,

680

1,770

137,000

104

193

122

Table 1. T-year peak discharges at

gaging stations Continued

Ui

Map

N

o.

33

9

340

341

342

343

34

4

34

5

346

347

348

Sta

tion

S

tati

on

nam

e an

d lo

cati

on

NO

.

05586000

No

rth

F

ork

M

auvai

se T

err

e

Cre

ek

near

Jacksonvil

le,

111.

Lat

39

°45

'38

",

lon

g 90°0

8'0

7",

in

SE

1/4N

W1/

4 sec. 8

,T

.15

N.,

R.9

W

., M

orga

n C

ounty

.

05586200

Illi

no

is

Riv

er

trib

uta

ry at

Flo

rence,

11

1.

Lat

39

°37

'55

",

lon

g 90°3

7'0

5",

in

N

E1/4

NW

1/4

sec.

15,

T.5

S

.,

R.2

W

. ,

Pik

e C

ou

nty

.

05586350

Lit

tle

San

dy

Cre

ek tr

ibuta

ry

near

Mu

rray

vil

le,

111.

Lat

39°3

6'0

5",

lo

ng

9

0»

17

'45

",

in

NW

1/4

sec. 2,

T.1

3

N.,

R.1

1

W.,

Morg

an

County

.

05586500

Hu

rric

an

e

Cre

ek

near

Ro

od

ho

use

, 111.

Lat

39

°29

'20

",

lon

g 90°2

5'0

0",

in

N

E1/

4 se

c.

15,

T.1

2

N.

, R

. 12

W

., G

reen

e C

ou

nty

.

05586850

Bear

Cre

ek tr

ibuta

ry near

Reeders

, 111.

Lat

39°1

7'4

0",

lo

ng

90°0

1'0

5",

in

S

El/

j sec.

19,

T.1

0

N.

, R

. 8

W.,

Mac

oupin

C

ounty

.

05

58

70

00

M

aco

up

in

Cre

ek

near

Xan

e,

111.

Lat

39°1

4'0

3",

lo

ng 9

0°2

3'4

0"

in

SE

1/4S

E1/

4 se

c.

11,

T.9

N

. ,

R.

12

W. ,

G

reen

e C

ounty

.

05587850

Cah

ok

ia

Cre

ek tr

ibuta

ry

No.

2

near

Carp

en

ter,

1

11

.L

at

38°5

2'4

0",

lo

ng 89°5

4'3

0",

in

S

EV

4SE

1/4

sec.

18,

T.5

N

. ,

R.7

W

.,

Mad

ison

County

.

05

58

79

00

C

aho

kia

C

reek

at

Ed

ward

svil

le,

11

1.

Lat

38°4

9'2

8",

lo

ng

89

e5

8'2

9",

in

NW

1/4S

E1/

4 se

c. 3

,T

.4

N.,

R.8

W

., M

adis

on

County

.

05588000

India

n

Cre

ek at

Wan

da,

111.

Lat

38°5

0'3

0",

lo

ng 9

0°0

1'5

9",

in

SE

1/4N

W1/

4 se

c. 31,

T.5

N

.,

R.8

W

.,

Mad

ison

County

.

05

58

95

00

C

ante

en

Cre

ek at

Case

yvil

le,

111.

Lat

38°3

8'3

5",

lo

ng

90°0

1'0

0",

in

N

1/5N

W1/

4 se

c. 8

,T

.2

N.

, R

.8

W.,

St.

C

lair

C

ounty

.

«2 94

21,4

30

97

7

32

42

23

30

4

40

84

10

40

9

20

83

36

219 12 13 12

9,7

90

11,8

00

9,8

90

156

121

150

4,7

80

5,6

60

4,9

10

1,8

60

1,8

80

1,8

60

1,8

10

1,5

10

1,7

90

* 1,9

00

2,4

70

1,9

50

561

43

05

36

791

762

783

397

610

42

3 21 24 22

17,8

00

19,3

00

17,9

00

29

922

528

4

6,7

00

9,5

70

7,1

10

3,4

70

3,2

60

3,4

40

3,2

50

2,6

40

3,1

80

«,.

2,5

90

3,2

00

2,6

50

718

58

769

2

1,0

80

1,0

30

1,0

60

553

80

55

89 29 32 29

23,6

00

24,4

00

23,6

00

40

730

138

5

7,7

80

12,3

00

8,4

70

4,7

90

4,2

30

4,7

20

4,3

80

3,4

60

4,2

60

22

5

3,4

80

4,1

40

3,5

50

90

68

05

88

5

1,4

60

1,3

80

1,4

30

78

31,0

70

830 39 44 40

31,0

00

30,8

00

31,0

00

557

40

452

1

8,9

30

15

,80

01

0,1

00

6,7

30

5,5

00

6,5

50

5,9

70

4,5

20

5,7

50

Qso

4,1

10

4,8

50

4,2

00

1,0

40

97

51,0

20

1,7

50

1,6

50

1,7

20

97

91

,27

01

,03

0 48 52 49

36

,60

035,6

00

36,6

00

67

548

262

7

9,6

80

18,4

00

11,2

00

8,3

80

6,4

40

8,0

70

7,2

60

5,3

30

6,9

50

QIOO

4,7

20

5,5

70

4,8

30

1,1

60

1,1

50

1,1

60

2,0

50

1,9

40

2,0

10

1,1

90

1,4

70

1,2

40 57 61 58

42,3

00

40,5

00

42,1

00

79

656

273

6

10,3

00

21

,00

012,2

00

10,2

00

7,4

10

9,7

30

8,6

70

6,1

50

8,2

40

Tabl

e 1. T-year peak discharges at

ga

ging

stations Continued

Map

Station

No.

No.

Station name and

location

Q2

QIOO

Ul

00

349

*05589780

Little Canteen Creek tributary near Collinsville,

111.

Lat 38°37'38", long 89°59'04", in NW

1/4N

W1/4

sec. 15,

T.2 N.,

R.8

W.,

St.

Clair County.

350

05590000

Kaskaskia Ditch at Bondville, 111.

Lat 40°06'47H

, long 88020'55", in NW1/4NW1/4 se

c. 18,

T.19 N.,

R.8

E.,

Champaign County.

351

05590400

Kaskaskia River near Pesotum, 111.

Lat 39°52'44", long 88°22'35", on north boundary

of se

c.2,

T.16 N.,

R.7

E.,

Douglas County

352

05590500

Kaskaskia River at Ficklin, 111.

Lat 39°48'00", long 88°21

t55H

, in SW1/4NW1/4 sec.36,

T.16 N.

, R.7 E.,

Douglas County.

353

05590800

Lake Po

rk at Atwood, 11

1.Lat 39°48'30", long 88°28'34", in NE1/4NW1/4 sec.36,

T.16 N.,

R.6 E.

, Piatt County.

354

05591200

Kaskaskia River at Cooks Mills, 11

1.Lat 39»35'01", long 88"24"50", in NW1/4SW1/4 sec. 10,

T.13 N.,

R.7

E.,

Coles County.

355

05591500

Asa Creek at Sullivan, 111.

Lat

39

°37

'11

",

lon

g

88«36'1

7"

, in

N

El/4

NE

l/4

sec.3

5,

T.1

4

N.,

R.5

E

.,

Mou

ltri

e C

ou

nty

.

356

05

59

17

50

S

trin

gto

wn

B

ran

ch tr

ibu

tary

n

ear

Lak

e C

ity

, 111.

Lat

39°4

6"

\5"

, lo

ng

88°4

3'1

0"

, in

S

El/

4 sec.2

, T

.15

N

.,

R.4

E

.,

Mou

ltri

e C

ou

nty

.

357

05592000

Kask

ask

ia

Riv

er a

t S

helb

yvil

le,

111.

Lat

39

°24

'25

",

lon

g

88°4

6'5

0"

, in

SE

1/4S

WV

4 sec.8

, T

.11

N.,

R.4

E

.,

Sh

elb

y

Cou

nty

.

358

05592025

Mud

C

reek

tr

ibu

tary

n

ear

Tow

er H

ill,

11

1L

at

39

»2

5'5

5"

, lo

ng

88

057'2

0"

, in

N

E1/

4 sec.3

, T

.11

N.,

R.2

E

.,

Sh

elb

y

Cou

nty

.

359

*0

55

92

10

0

Kask

ask

ia

Riv

er

nea

r C

owd

en,

11

1.

Lat

39

°13

'50

",

lon

g

88°5

0'3

3"

, in

N

Wl/j

NW

l/j

sec.

14,

T.9

N

.,

R.3

E

.,

Sh

elb

y

Cou

nty

.

171

37

85

61

844

1,0

90

1,3

60

362

1/4 se

c. 18,

723

383

1,810

xmndary

1,790

ity.

1,810

1,950

1/4 sec. 36,

1,910

1,940

2,370

1/4 sec. 36,

2,380

2,380

5,090

1/4 sec. 10,

4,530

5,000

338

I/4 se

c. 35,

365

340

:y,

111.

52

jc.2

, 97

58

9,420

l/4 sec. 8,

8,280

9,330

114

ic.3,

66

104

640

1,250

695

2,450

2,910

2,540

3,220

3,100

3,180

3,070

3,880

3,250

7,400

7,190

7,360

658

618

653

86

173

98

16,000

13,100

15,800

224

122

195

865

1,630

948

2,860

3,660

3,030

4,110

3,870

4,050

3,500

4,880

3,840

8,830

8,950

8,850

904

791

889

109

226

126

20,600

16,300

20,100

316

164

267

1,200

2,110

1,320

3,360

4,570

3,660

5,270

4,840

5,130

4,010

6,110

4,570

10,500

11,100

10,700

1,250

1,010

1,210

138

296

163

26,100

20,100

25,400

454

220

372

1,480

2,470

1,620

3,710

5,250

4,100

6,150

5,550

5,940

4,370

7,010

5,110

11,700

12,7

00

12,000

1,520

1,17

0 1,

460

158

348

190

30,100

23,000

29,200

573

263

458

1,79

0 2,820

1,950

4,060

5,900

4,540

7,030

6,220

6,750

4,710

7,910

5,610

12,900

14,200

13,200

1,790

1,330

1,710

178

400

216

34,000

25,700

32,900

703

307

553

- A

ffecte

d

by

up

stre

am

rese

rvoir

-

Table

1. T-year peak discharges at

ga

ging

stations Continued

Ui

Map

N

o.

360

361

362

36

3

36

4

36

5

366

36

7

36

8

369

370

Sta

tion

No.

05

59

23

00

05

59

25

00

05

59

27

00

05592800

05

59

30

00

05

59

35

20

05

59

35

75

05

59

36

00

05

59

37

00

05

59

39

00

05

59

40

00

Sta

tion

nam

e an

d lo

cati

on

Wo

lf

Cre

ek

near

Beech

er

Cit

y,

111.

Lat

39°0

9'3

0",

lo

ng

88°4

8'2

0",

in

NE

1/4N

E1/

4 se

c.

12,

T.8

N

. ,

R. 3

E

. ,

Fayett

e

County

.

Kask

ask

ia

Riv

er

at

Vandali

a,

111.

Lat

38°5

7'3

5",

lo

ng

89°0

5'2

0",

in

SE

1/4

sec.

16,

T.6

N

. ,

R.

1 E

.,

Fayett

e

County

.

Hurr

icane

Cre

ek tr

ibu

tary

near

Wit

t,

111.

Lat

39°1

3'0

0",

lo

ng

89«15'1

5",

in

S

E1/

4 sec.

13,

T.9

N

.,

R.2

W

. ,

Montg

om

ery

County

.

Hu

rric

an

e

Cre

ek near

Mulb

err

y

Gro

ve,

1

11

. L

at

3805

5'2

1",

long

89°1

4'1

4",

in

NW

y4S

El/

4 se

c. 31,

T.6

N

.,

R.1

W

.,

Fayett

e

County

.

Kask

ask

ia

Riv

er

at

Carl

yle

, 111.

Lat

38

e36

'42

",

long

89°2

1'2

2",

in

SE

1/4

sec.

18,

T.2

N

.,

R.2

W

. ,

Cli

nto

n

County

.

Cro

oked

C

reek

near

Hoff

man

, 111.

Lat

38°

30 '2

5",

long

89"

16' 2

4",

in

N

El/

qNE

l/4

sec. 2

6,

T.1

N

. ,

R.2

W

. ,

Was

hin

gto

n

County

.

Lit

tle

Cro

oked

C

reek

near

New

M

ind

en,

111.

Lat

38

°26

'30

",

long

8

9°2

5'0

0",

in

SWV

4NE

1/4

sec.

15,

T.1

S

. ,

R.3

W

., W

ashin

gto

n

County

.

Blu

e

Gra

ss

Cre

ek n

ear

Ray

mon

d,

111.

Lat

39

«M

6'0

7",

lo

ng

89°3

2'0

2",

in

N

E1/

4SE

1/4

sec.

33,

T.1

0

N.

, R

.4

W. ,

M

on

tgo

mer

y

County

.

Blu

e

Gra

ss

Cre

ek tr

ibu

tary

near

Ray

mo

nd

, 111.

Lat

39°1

6'4

6",

lo

ng 89°3

3'2

4",

in

S

El/4

sec.

29

, T

.10

N.,

R.4

W

. ,

Mo

ntg

om

ery

C

ounty

.

East

F

ork

S

hoal

C

reek

n

ear

Coff

een,

111.

Lat

39°0

8'5

6",

lo

ng

89°2

1'0

8",

in

NW

Vfc

SEl/j

se

c. 7

, T

.8

N.,

R.2

W

.,

Mo

ntg

om

ery

C

ounty

.

Sh

oal

Cre

ek

near

Bre

ese

, 111.

Lat

38

°36

'35

",

long

89°2

9'4

0",

in

SW1/

4SW

1/4

sec.

13,

T.2

N

.,

R.4

W

.,

Cli

nto

n

County

.

Q2

3,0

00

1,8

20

2,8

20

12

,90

0

14

,60

0

12

,90

0 72

36

6

5

8,2

40

4,2

90

7,2

90

13

,90

0

18

,30

0

14,1

00

5,0

70

4,8

30

5,0

20

3,7

30

2,5

50

3,5

20

1,0

00

66

2

95

5

147 81

127

2,1

30

1,8

80

2,0

90

9,0

40

1

0,3

00

9

,12

0

65

5,0

10

3,1

10

4

,67

0

22,0

00

23,1

00

22,1

00 98

6

6

92

12,8

00

7,2

40

11

,40

0

24,5

00

29,0

00

24,8

00

8,0

40

7,9

80

8,0

20

6,3

10

4,3

10

5,9

00

1,4

60

1,1

20

1,4

10

21

3

148

191

3,3

10

3,2

00

3,3

00

15

,80

0

16

,90

0

15

,90

0

do

6,4

10

4,0

10

5,9

20

29,4

00

28

,80

0

29,4

00

114

87

109

15,7

00

9,2

90

13,9

00

32,5

00

36

,00

0

32,8

00

9,8

90

10,1

00

9,9

30

8,0

90

5,5

10

7,5

00

1,7

40

1,4

30

1,6

90

25

8

197

23

5

4,1

40

4,1

00

4,1

30

20,9

00

21,4

00

20,9

00

Q25

8,1

80

5,1

50

7,5

00

40

,60

0

35,8

00

40,0

00

132

115

129

19

,20

0

11

,90

0

17

,00

0

43,3

00

44,8

00

43,4

00

12

,00

0

12

,90

0

12

,30

0

10

,40

0

7,0

50

9,5

10

2,0

60

1,8

20

2,0

20

313

26

2

29

3

5,2

10

5,2

60

5,2

20

27,7

00

27,1

00

27,7

00

Qso

9,5

10

6,0

10

8,6

90

50,1

00

40,9

00

49,0

00

145

136

143

21,7

00

13,9

00

19,2

00

51,6

00

51,1

00

51,5

00

13,5

00

14

,90

0

13

,90

0

12,0

00

8,2

00

11,0

00

2,2

90

2,1

10

2,2

50

35

5

311

338

6,0

10

6,1

20

6,0

40

33,1

00

31,3

00

32,9

00

ClO

O

10,8

00

6,8

70

9,8

60

60,8

00

45,9

00

58,7

00

157

157

157

24,0

00

15,9

00

21,4

00

60,3

00

57,3

00

59,8

00

14,9

00

16

,90

0

15,5

00

13

,60

0

9,3

50

12,4

00

2,4

90

2,4

00

2,4

70

396

361

383

6,8

40

6,9

80

6,8

70

38

,60

0

35,5

00

38

,20

0

Table 1. T-year peak discharges at gaging stations Continued

Map

S

tati

on

No.

N

o.

371

05594090

372

*0

55

94

10

0

37

3

05594200

37

4

05594330

375

05594450

376

05

59

48

00

377

05595000

378

05595200

379

05595500

38

0

05

59

55

10

Sta

tion

nam

e an

d lo

cati

on

Sugar

C

reek

at

Alb

ers

, 111.

Lat

38

«3

2I2

9",

lo

ng

89«37'3

6",

in

SW

l/jSW

Vq

sec.

11,

T.1

N

.,

R.5

W

.,

Cli

nto

n

County

.

Kask

ask

ia

Riv

er

near

Ven

edy

sta

tio

n,

11

1.

Lat

38°2

7'0

2",

lo

ng

89°3

7'3

9",

in

N

W1/

4NW

1/4

sec.

14,

T.I

S

. ,

R.5

W

., W

ashin

gto

n

Co

un

ty.

Wil

liam

s C

reek

near

Cord

es,

111.

Lat

38°

19' 4

0",

lo

ng

89°2

8'3

5",

in

N

W^/

4 se

c.

30

,T

.2

S.,

R. 3

W

., W

ashin

gto

n

County

.

Mud

C

reek

near

Mari

ssa,

11

1.

Lat

38°

15 '4

6",

lon

g

89

»4

3'5

6",

in

N

E1/4

NW

1/4

sec.

23,

T.3

S

. ,

R.6

W

., S

t.

Cla

ir

County

.

Sil

ver

Cre

ek

near

Tro

y,

111.

Lat

38°4

3'0

0",

lo

ng

89°4

9'4

5",

in

SE

1/4S

W1/

4 se

c.

12,

T.3

N

. ,

R.7

W

. ,

Mad

iso

n

Co

un

ty.

Sil

ver

Cre

ek

near

Fre

eburg

, 1

11

.L

at

38

°24

'22

",

long

89°5

2'2

6",

in

N

E1/

4NE

1/4

sec.

33

,T

.1

S.,

R.7

W

. ,

St.

C

lair

C

ounty

.

Kask

ask

ia

Riv

er

at

New

A

then

s,

11

1.

Lat

38°

19*45",

lo

ng

89°5

2'4

5",

in

SW

1/4N

E1/

4 se

c. 28,

T.2

S

.,

R.7

W

. ,

St.

C

lair

C

ou

nty

.

Ric

hla

nd

C

reek

n

ear

Hec

ker

, 1

11

.L

at

38

«1

9'2

6",

lo

ng

89°5

8'

15",

in

SW

V4S

El/

4 se

c. 2

7,

pro

jecte

d,

T.2

S

. ,

R.8

W

., S

t.

Cla

ir

County

.

Mar

ys

Riv

er

near

Spart

a,

111.

Lat

38

°06

'29

",

long 89°3

8'5

6",

in

N

E1/

4SE

1/4

sec. 9

,T

.5

S.

, R

.5

W.,

Ran

do

lph

C

ounty

.

Lic

k

Bra

nch

n

ear

Ed

en,

11

1.

Lat

38°0

5'5

5",

lo

ng

89»37'2

2",

in

N

W1/

4 sec.

14,

T.5

S

. ,

R.5

W

. ,

Ran

do

lph

C

ou

nty

.

»2 3,7

20

3,0

10

3,5

20

33

926

23

23

1,8

70

2,7

50

2,0

40

3,8

40

4,2

00

3,8

80

4,5

90

7,7

40

5,0

10

23,0

00

31,3

00

23

,30

0

4,7

10

4,5

80

4,6

90

1,4

50

1,1

70

1,4

10

161

262

180

as 6,5

30

5,0

20

6,0

80 _

59

84

73

56

4

3,2

40

4,7

00

3,6

20

6,8

70

7,0

80

6,9

00

8,3

00

12

,80

08

,95

0

42,1

00

49,4

00

42,6

00

7,8

20

7,8

50

7,8

30

2,8

80

2,0

60

2,7

00

322

48

33

69

a,.

8,5

70

6,4

00

7,8

30

Aff

ecte

d

by

80

062

47

46

4,3

10

6,0

70

4,8

40

8,9

10

9,0

60

8,9

50

10

,80

01

6,2

00

11

,70

0

56,8

00

61,4

00

57,1

00

10,0

00

10

,20

01

0,0

00

4,1

40

2,6

80

3,7

50

46

66

46

526

»2S

11,2

00

8,1

50

10,0

00

Qso

13,2

00

9,4

40

11

,70

0

»,0

0

15

,20

01

0,7

00

13,4

00

upst

ream

re

serv

oir

-

1,0

80

82

29

98

5,8

20

7,8

20

6,5

20

11,4

00

11,6

00

11,5

00

13

,90

020,6

00

15,2

00

77,3

00

76,4

00

77,1

00

12

,80

01

3,2

00

12,9

00

6,1

10

3,4

90

5,2

80

693

86

375

7

1,3

20

973

1,2

00

7,0

80

9,1

60

7,8

30

13,2

00

13,5

00

13

,30

0

16,1

00

23,8

00

17,7

00

93,5

00

87,3

00

92,9

00

14

,90

015,4

00

15,0

00

7,8

30

4,1

10

6,6

10

89

91,0

30

951

1,5

70

1,1

30

1,4

10

8,4

30

10

,50

09

,20

0

14

,90

01

5,5

00

15

,00

0

18,2

00

27

,00

02

0,0

00

11

1,0

00

98,2

00

10

9,0

00

16,9

00

17

,70

01

7,1

00

9,8

20

4,7

30

8,0

50

1,1

40

1,2

00

1,1

60

381

*05595550

Marys River tributary at Chester, 111.

Lat

37°5

5'2

7",

lo

ng 8

9°4

8'2

6M

, in

SE

1/4N

W1/

4 se

c.1

8,

T.7

S

.,

R.6

W

., R

and

olp

h

Co

un

ty.

26

73

84

461

55

66

27

696

Tab

le

1. T

-year

pea

k

dis

charg

es

at

gag

ing st

ati

on

s C

onti

nued

Map

No.

382

383

384

385

Stat

ion

Stat

ion

name and

location

No.

05595800

Sevenmile

Creek

near Mt.

Vern

on,

111.

Lat 38° 19

MO", lo

ng 88

°50'

50",

in NW1/4SW1/4 se

c. 26,

T.

2 S.

, R.3

E. ,

Jefferson

Coun

ty.

05596000

Big Muddy

River

near Be

nton

, 11

1.

Lat 37«59'40", long 88

°58'

30",

in NE1/4NW1/4 se

c. 22,

T.6 S.,

R.2

E.,

Franklin Co

unty

.

05596100

Andy Cr

eek

trib

utar

y at

Va

lier

, 11

1.

Lat 38°01'15", long 89

°02'

40",

in NW

1/4N

E1/4

se

c. 12,

T.6 S.

, R. 1

E.,

Franklin Co

unty

.

05597000

Big Mu

ddy

Rive

r at Pl

umfi

eld,

11

1.

Lat 37°54'05", lo

ng 89°00'50", in

NWl/4

sec.

20,

T.7

S. ,

R.2

E.,

Franklin Co

unty

.

Q2 1,030

1,410

1,070

7,460

6,300

7,350

254

223

247

7,710

8,360

7,730

* 1,560

2,260

1,670

14,200

9,350

13,300

455

378

436

12,800

12,300

12,800

2io

1,930

2,850

2,090

19,800

11,300

17,900

604

488

571

16,300

14,900

16,200

225

2,400

3,600

2,630

28,200

13,700

24,500

802

628

750

20,400

17,900

20,300

«50

2,750

4,160

3,030

35,500

15,400

29,900

955

735

887

23,400

20,200

23,200

«,

3,110

4,710

3,440

43,600

17,100

35,600

1,110

841

1,030

26,300

22,300

26,000

385

*055

9700

0 B

ig

Mud

dy

Riv

er at

Plu

mfi

eld

, 111.

4,9

00

7

,32

0

8,9

30

10,9

00

12,4

00

13

,90

0L

at

37

»5

4'0

5",

lo

ng

89»00'5

0",

in

N

W1/

4 se

c.2

0,

T.7

S

. ,

R.2

E

.,

Fra

nk

lin

C

ou

nty

.

386

*055

9745

0 C

rab

Orc

har

d

Cre

ek tr

ibu

tary

near

Pit

tsb

urg

, 111.

221

285

327

379

419

458

Lat

37°4

6'1

8",

lo

ng

8

8°4

7'5

2",

in

SW

1/4N

W1/

4 se

c.5

,

T.9

S

.,

R.4

E

. ,

Wil

liam

son

Co

un

ty.

387

0559

7500

C

rab O

rchar

d

Cre

ek

near

Mar

ion,

111.

1,5

40

2,5

20

3,1

80

4

,00

0

4,5

90

5

,18

0L

at

37

«4

3'5

2",

lo

ng

88°5

3'2

1",

in

SW

V4S

Wl/4

Sec.1

6,

1,5

70

2,4

90

3,1

10

3,8

90

4

,47

0

5,0

40

T.9

S

.,

R.3

E

.,

Wil

liam

son

County

. 1,5

50

2,5

20

3,1

70

3

,98

0

4,5

80

5

,15

0

388

0559

9000

B

eauco

up

Cre

ek

near

Mat

thew

s,

11

1.

4,7

20

8,9

70

12,5

00

17,7

00

22

,10

0

27

,00

0L

at

37

»5

8'0

0",

lo

ng

89°2

1'0

0",

in

SW

1/4 se

c.2

9,

5,3

00

8

,04

0

9,7

90

12,0

00

13

,60

0

15

,10

0T

.6 S

.,

R.2

W

., P

err

y

Co

un

ty.

4,7

60

8

,87

0

12,1

00

16,7

00

20

,50

0

24

,60

0

389

0559

9500

B

ig

Mud

dy

Riv

er at

Murp

hysb

oro

, 111.

12

,80

0

20,5

00

25,5

00

31

,40

0

35

,60

0

39

,50

0L

at

37°4

4'5

5",

lo

ng

89°2

0f4

5",

in

SE

1/J

sec.8

, 16,2

00

23,6

00

28,2

00

34

,00

0

38

,00

0

42

,00

0T

.9 S

.,

R.2

W

., Ja

ckso

n

County

. 1

2,9

00

20,7

00

25,6

00

31

,60

0

35

,80

0

39

,70

0

389

*055

9950

0 B

ig M

uddy

R

iver

at

Mu

rph

ysb

oro

, 1

11

. 13,5

00

20,5

00

25,2

00

31,0

00

35

,20

0

39

,20

0L

at

37°4

4'5

5",

lo

ng

89°2

0'4

5",

in

SE

1/4

sec.8

,

T.9

S

.,

R.2

W

., Ja

ckso

n

Co

un

ty.

390

0559

9560

C

lay

L

ick

Cre

ek

near

Mak

anda

, 111.

736

1,3

00

1,7

70

2,4

60

3,0

50

3,7

20

Lat

37

°36

'00

",

lon

g

89

°14

'25

",

in

SW1/

4 se

c.3

2,

465

798

1,0

40

1,3

50

1,5

90

1,8

30

T.1

0

S.,

R

.1

W.,

Jack

son

C

ounty

. 67

1 1,1

30

1,4

80

1,9

90

2,4

20

2,8

80

Tabl

e 1. T-year peak discharges at

gaging stations Continued

Map

Stat

ion

No.

No.

391

*05599580

392

05599640

393

05599800

394

05600000

Stat

ion

name and

location

Big Muddy Ri

ver

tributary

near

Go

rham

, 111.

Lat

37»4

0'21

", long 89

*28 '49",

in NW1/4NE1/4 sec. 7,

T.10 S. ,

R.

3 W.

, Ja

ckso

n Co

unty

.

Green

Creek

tributary

near

Jonesboro, 111.

Lat 37

°27'

55",

lo

ng 89

°18'

40",

in

NE

1/4N

E1/4

sec. 22,

T.12 S. ,

R.2

W.,

Union

Coun

ty.

Orchard Creek

near

Fa

yvil

le,

111.

Lat

37°11'35", lo

ng 89°24'35", in SE

1/4S

W1/4

sec. 23,

T.15 S. ,

R.

3 W.

, Al

exan

der

Coun

ty.

Big Creek

near

We

taug

, 11

1.La

t 37»19'00", lo

ng 89

°07'

55",

in SW1/4

sec.

5,

T.14 S.

R.

1 E.,

Pula

ski

Coun

ty.

Q2

38

266

199

254 61 74 65

2,170

1,870

2,15

0

Cs

65

418

351

405

100

133

112

2,950

2,990

2,960

010 86

516

461

506

129

177

147

3,500

3,760

3,540

Q25 11

4

638

610

632

167

237

194

4,230

4,740

4,320

Qso 13

7

724

723

724

199

282

231

4,810

5,470

4,920

QIOO 16

1

809

839

815

232

330

269

5,410

6,180

5,550

Table 2. Selected basin

char

acte

rist

ics,

years

of re

cord

, eq

uiva

lent

years

of re

cord

, an

d maximum fl

ood

for

nonregulated rural

gaging stations

[A,

drai

nage

ar

ea;

S, slope; I, rainfall in

tens

ity,

RI,

recurrence in

terv

al;

mi2

, square miles; ft

/mi,

feet per

mile

;in

., in

ches

; ft

3/s,

cu

bic

feet per se

cond

; yrs, years; equivalent ye

ars

of record is

associated with the

regr

essi

on estimating eq

uati

ons.

Footnotes

are

at en

d of

ta

ble.

]

cr> U)

Map

Station

No.

No.

1 03336100

2 03336500

3 03336900

5 03337500

6 03338000

7 03338100

8 03338500

9 03338800

10

03339000

11

03341700

12

03341900

13

03343400

14

03344000

15

03344250

16

03344425

17

03344500

18

03345500

19

03346000

20

03378000

21

03378635

22

03378650

23

03378900

24

03378980

25

03379500

26

03379650

27

03380300

28

03380350

29

03380400

30

03380450

31

03380475

Years

of

record

25 33 27 39 37 22 19 21 63 15 25

25 21 25 18 35

74 45

45 19 17 20 22 71 21 25 18 12 25

25

A

(mi2

)

1.05

35.0

134 68.0

340 2.20

958 1.

311,290 1.

08 .04

186

919.08

.07

7.61

1,516

318

228

240 1.

62745.43

1,13

1 1.62 .08

208 1.

13 .43

97.2

S (f

t/mi

)

21.01

6.92

5.49

2.59

3.01

15.81

3.12

33.21

3.22

44.35

52.80

2.96

1.53

10.5

197.15

15.73

1.58

4.33

2.85

5.34

19.59

2.66

73.61

2.01

36.06

98.74

2.78

36.06

87.65

4.07

I (i

n.)

2.9

3.0

3.0

3.0

3.0

3.0

3.0

3.0

3.0

3.1

3.2

3.1

3.1

3.2

3.2

3.2

3.2

3.2

3.3

3.2

3.3

3.3

3.2

3.3

3.3

3.4

3.3

3.4

3.4

3.4

Regi

on I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

2Recurrence in

terv

al,

in

5 10

25

50

Equivalent

3.7

3.3

3.1

2.9

2.9

3.6

2.9

3.9

2.9

4.1

4.4

3.0

2.7

3.3

4.7

3.7

2.8

3.2

3.0

3.3

3.9

3.1

4.7

2.9

4.2

5.0

3.1

4.4

4.9

3.3

4.1

4.2

4.9

3.3

3.5

3.6

4.2

6.0

3.7

6.7

5.0

3.1

3.9

4.7

6.8

5.8

3.8

3.8

4.7

4.5

5.9

3.8

5.2

4.1

7.0

6.5

3.9

6.2

6.1

4.5

4.6

5.0

6.1

3.9

4.2

4.1

5.1

7.0

4.4

8.0

5.6

3.6

4.8

5.5

7.6

6.9

4.5

4.5

5.8

5.4

7.0

4.4

5.7

4.9

8.3

7.2

4.6

7.1

6.7

5.3

years

5.3

5.8

7.2

4.6

4.9

4.8

6.0

8.0

5.2

9.0

6.2

4.2

5.7

6.3

8.3

7.9

5.4

5.2

6.9

6.2

7.9

5.2

6.4

5.8

9.3

7.8

5.3

7.8

7.3

6.2

years

100

Maximum flood

500

of record

5.7

6.2

7.7

5.0

5.3

5.1

6.5

8.3

5.6

9.3

6.5

4.6

6.2

6.6

8.6

8.4

5.8

5.6

7.4

6.7

8.3

5.6

6.7

6.2

9.6

8.0

5.7

8.1

7.6

6.6

5.9

6.5

8.0

5.3

5.6

5.4

6.9

8.5

6.0

9.5

6.7

4.9

6.6

6.9

8.7

8.6

6.2

5.9

7.7

7.0

8.5

5.9

6.9

6.6

9.8

8.1

6.0

8.3

7.7

6.9

6.2

6.8

8.3

5.6

6.0

5.7

7.2

8.6

6.3

9.4

6.8

5.2

7.0

7.0

8.6

8.6

6.5

6.2

7.9

7.2

8.5

6.2

7.0

6.9

9.6

8.1

6.3

8.3

7.7

7.1

Year

1959

1968

1968

1964

1964

1980

1943

1974

1939

1961

1974

1979

1985

1974

1974

1961

1950

1950

1961

1970

1970

1968

1971

1950

1961

1961

1968

1968

1975

1961

Dis­

charge

(ft3/*) 249

5,160

6,860

4,080

10,100

640

36,000

1,600

48,700

511 48

6,240

20,400 68

112

3,500

44,800

27,100

7,500

10,300

930

24,000

409

47,000

1,550

152

19,000

570

323

17,100

RI

(yrs

)

15 8045

>100 60 25

>100

>100

>100 20

20

20

25

50

25

60

45

8080 20

100

20 20 45

>100

9090 15 20

>100

Tabl

e 2. Selected basin

char

acte

rist

ics,

years

of re

cord

, equivalent ye

ars

of re

cord

,an

d maximum

Map

Stat

ion

No.

No.

32

03380500

33

03381500

34

03381600

35

03382025

36

03382100

37

03382170

39

03382510

40

03382520

41

03384450

42

03385000

43

03385500

45

03612000

46

03612200

47

03614000

48

04087300

49

04087400

50

05414820

51

05415 (T

OO

52

05415500

53

05418750

54

05418800

55

05419000

56

05420000

57

05430500

58

05431500

59

05434500

60

05435000

61

05435500

62

05435650

63

05436500

64

05436900

65

05437000

66

05437500

67

05437600

68

05437950

Years

of

record

68

46 17 22 20 14 16 13 18 36 26

63 21 14 17 15 18

_ 45

30 20 20 51 37

69

42

45 25 72 16 70 20 32 56 16 14

A

(mi2)

464

3,102.1

6.5

2147 13.3

8.51

1.10

42.9

19.1 1.05

244.27

1.95

1.5

5.04

39.6

125 20.1 1.93 .86

247

230

3,340

202

1,034 1.

311,326 1.

95523

.55

2,550

6,363 2.

2114

.4

S (f

t/mi

)

1.90

1.16

89.76

75.50

4.26

12.16

25.49

28.25

16.23

21.44

145.20

2.69

140.98

23.87

34.32

21.67

18.9

111.32

37.30

35.20

157.87

10.93

6.55

0.74

2.68

2.27

40.90

1.61

29.36

3.18

97.11

0.92

0.84

40.26

7.38

flood for nonregulated rural gaging stations Continued

I (i

n.)

3.4

3.3

3.3

3.5

3.5

3.4

3.4

3.4

3.5

3.5

3.5

3.5

3.5

3.6

2.7

2.6

3.0

~3TT

T3.0

3.0

3.0

3.0

3.0

2.8

2.8

2.9

3.0

3.0

3.0

2.9

2.9

2.9

2.7

2.8

2.7

Regi

on I I IIV

IV

IV

IV

IVIVIV

IV

IVIV

IV I I I I I I I I I I I I I I I I I I I I I

2Recurrence in

terv

al,

in

5 10

25

50

Equivalent

3.0

2.7

4.7

4.6

3.2

3.5

4.0

4.0

3.7

3.8

5.0

3.0

4.9

4.0

3.1

2.4

3.6

J.T

3.8

4.1

4.7

3.3

3.2

2.2

2.6

2.7

4.1

2.6

3.9

2.8

4.2

2.4

2.0

3.7

2.7

4.0

4.2

7.1

6.6

4.2

5.9

4.5

5.6

5.9

6.0

5.8

3.7

7.2

6.1

5.1

3.8

5.5

6.4

6.1

4.5

5.9

4.8

4.4

2.6

3.4

3.7

4.8

4.0

5.3

3.7

6.3

2.9

2.4

3.9

3.0

4.8

5.3

8.1

7.5

4.9

7.2

5.0

6.5

7.0

7.0

6.3

4.4

8.1

7.1

6.2

4.8

6.6

year

s

5.6

6.3

8.9

8.1

5.6

8.2

5.6

7.2

7.9

7.9

6.8

5.0

8.7

7.9

7.3

5.7

7.6

8.4

tO.O

7.3

5.1

6.6

5.7

5.2

3.1

4.1

4.6

5.4

4.9

6.1

4.4

7.3

3.5

3.0

4.4

3.6

8.3

5.8

7.2

6.6

6.1

3.8

4.9

5.5

6.1

5.9

6.9

5.2

8.1

4.2

3.6

5.0

4.2

years

100

Maximum fl

ood

500

of re

cord

6.1

6.9

9.1

8.3

5.9

8.7

5.9

7.5

8.3

8.2

7.0

5.4

8.9

8.2

7.8

6.2

8.1

10.7

8.7

6.1

7.5

7.1

6.6

4.2

5.4

6.0

6.4

6.5

7.3

5.7

8.4

4.6

4.0

5.4

4.6

6.4

7.3

9.2

8.4

6.2

8.9

6.1

7.7

8.5

8.4

7.1

5.6

8.9

8.4

8.0

6.5

8.3

11.18.9

6.4

7.6

7.4

6.9

4.5

5.7

6.3

6.6

6.8

7.5

6.0

8.6

5.0

4.3

5.6

4.8

6.7

7.6

9.0

8.3

6.4

8.9

6.2

7.7

8.5

8.4

7.1

5.9

8.7

8.4

8.2

6.9

8.4

11.1 8.9

6.6

7.6

7.6

7.1

5.0

6.1

6.7

6.8

7.2

7.7

6.3

8.5

5.4

4.7

5.9

5.2

Year

1961

1961

1974

1969

1982

1977

1973

1969

1985

1985

1958

1935

1967

1966

1969

1969

1969

t96T

1947

1974

1965

1946

1946

1929

1973

1969

1974

1929

1974

1915

1969

1959

1916

1974

1972

Dis­

charge

(ft3/s

)

51,000

46,900

484

563

5,160

2,590

668

695

16,100

9,450

1,500

9,630

392

754

355

937

11,600

29,700

16,600

520

862

12,000

11,600

13,000

16,500

15,100

698

18,400

660

14,800

187

16,600

32,500

308

192

RI

(yrs)

>100 100

>100 70 10 60 350

>100

>100 30 20 25 15 50

>100 60

>100

>100 15 40 25 40 30

>100 25 25 45 45 60 15 15 456 5

Table

2. Selected ba

sin

characteristics, years

of re

cord

, eq

uiva

lent

ye

ars

of re

cord

,and maximum

Map

Stat

ion

No.

No.

69

05438250

70

05438300

71

05438390

72

05438500

73

05438850

74

05439000

75

05439500

76

05439550

77

05440000

78

05440500

79

05440650

80

05440900

81

05441000

82

05441500

83

05442000

84

05443500

85

05444000

86

05444100

87

05446000

88

05446500

89

05446950

90

05447000

91

05447050

93

05447350

94

05447500

95

05448000

96

05448050

97

05466000

98

05466500

99

05467000

100

05467500

101

05468000

102

05468500

103

05469000

104

05469500

Years

of

record

24 20 10 46 25 14 46 18 46 41 18 23 43 10 12 70 46 14 40 46 16 42 14 16 50 46

25 45 51 51 41 11 44 51 42

A

(mi*)

85.1 .8

488.1

538 1.

67

77.7

387 1.

711,099

117 1.

00 .15

103

8,205

116

8,753

146 1.

42164

9,549

.53

201 4.95

1.22

1,003 62.4 .2

215

5445

174

151 67.1

130

432 82.9

S (f

t/mi

)

5.72

87.34

8.27

4.59

28.72

2.65

2.27

53.75

4.07

6.34

33.16

144.14

10.45

0.95

5.17

1.00

4.28

60.19

3.48

1.11

86.23

3.85

20.91

32.52

2.53

7.44

67.06

5.07

2.69

3.59

4.22

5.02

4.49

3.96

6.12

flood fo

r nonregulated rural gaging stations Continued

I (in.)

2.8

2.8

2.8

2.8

2.9

2.9

2.8

2.8

2.8

2.9

2.9

3.0

2.9

2.8

2.9

2.8

3.0

3.0

3.0

2.9

3.0

2.9

3.0

3.1

3.0

3.2

3.2

3.2

3.2

3.2

3.2

3.2

3.2

3.2

3.2

Region

I I I I I I I I I I I I I I I I I I I I I I I I I I IIII

III

III

III

III

III

III

III

2Recurrence interval, in

5

10

25

50

Equivalent

2.9

4.0

2.9

2.7

3.8

2.6

2.5

3.8

2.7

3.1

3.8

4.5

3.3

2.2

3.0

2.2

3. 1

4.3

2.9

2.4

4.3

2.9

3.7

3.9

2.8

3.5

4.5

3.2

3.0

3.1

2.9

3.3

3.2

3.0

3.1

3.0

5.1

4.4

3.4

4.6

4.6

2.5

4.6

3.0

3.0

5.1

7.4

3.6

3.1

4.3

2.4

3.3

5.1

4.6

2.8

6.8

2.9

5.5

6.8

3.0

4.0

6.7

3.3

3.6

4.2

5.7

3.6

4.3

5.3

6.1

3.5

5.8

5.3

4.0

5.3

5.8

3.0

5.3

3.5

3.5

5.9

8.6

4.2

3.9

5.2

2.8

3.9

5.7

5.7

3.3

7.9

3.4

6.5

8.3

3.5

4.7

7.7

3.8

4.2

5.0

7.5

4.1

5.0

6.7

8.0

years

4.1

6.4

6.3

4.8

6.1

7.1

3.6

6.0

4.1

4.2

6.7

9.4

4.9

4.8

6.2

3.4

4.6

6.4

6.8

4.0

8.8

4.1

7.4

9.4

4.1

5.4

8.4

4.4

5.0

5.9

9.0

4.8

5.8

8.0

9.6

years

100

Maximum flood

500

of record

4.5

6.8

6.8

5.2

6.4

7.7

4.0

6.4

4.5

4.5

7.1

9.7

5.3

5.3

6.7

3.7

4.9

6.7

7.4

4.4

9.1

4.4

7.8

9.9

4.5

5.8

8.7

4.7

5.4

6.3

9.7

5.1

6.3

8.6

10.3

4.8

7.0

7.1

5.5

6.7

8.2

4.2

6.6

4.8

4.8

7.3

9.7

5.5

5.6

7.0

4.0

5.2

6.9

7.7

4.7

9.2

4.7

8.0

10.0

4.8

6.0

8.8

5.0

5.6

6.6

10.1 5.4

6.6

8.9

10.6

5.1

7.1

7.4

5.8

6.9

8.5

4.6

6.8

5.1

5.1

7.4

9.5

5.8

6.1

7.3

4.4

5.6

7.1

8.0

5.1

9.1

5.0

8.2

19.9

5.1

6.3

8.8

5.3

6.0

6.9

10.2

5.7

6.8

9.1

10.7

Year

1978

1972

1973

1943

1959

1983

1973

1971

1979

1955

1971

1958

1972

1946

1951

1973

1974

1965

1946

1948

1967

1981

1969

1967

1974

1973

1980

1951

1973

1973

1982

1950

1982

1982

1982

Dis­

charge

(ft3/

s)

5,090

180

4,000

10,300 393

3,500

8,460

452

16,7

006,100

297

212

7,950

45,500

2,630

59,700

6,770

832

5,770

46,200

493

7,600

431

890

12,100

9,300

168

8,910

18,0

008,900

23,400

1,74

012,600

34,600

10,500

RI

(yrs

)

>1008

25 20 25

>100 25 25 15 15 30 25 15 15 10

>100 35 30 100 20 30

>100 10

>100 35 40 20

>100

>100

>100

>100 690

>100

>100

Tabl

e 2. Selected basin ch

arac

teri

stic

s, years

of re

cord

, eq

uiva

lent

years

of re

cord

.

cn

en

and maximum

Map

No.

105

106

107

108

109

110

111

112

113

114

115

116

117

1 18

119

120

121

122

123

124

125

126

127

128

129

130

132

134

139

144

189

190

213

225

226

Years

Stat

ion

of

A No.

record

(mi2

)

05469750

05495200

05495500

05496900

05501500

05502020

05502040

05502120

05512500

05513000

05513200

05518000

05519500

05520000

05520500

05524500

05525000

05525050

05525500

05526000

05526150

05526500

05527050

05527500

05527800

05527840

05527900

05528000

05528360

05529000

05536178

05536190

05537500

05540110

05540140

25 24 42

21 15 30 45

25 46

46 24 62 23

33 71 36 41--T7

37 62 25 26 17 71 25 15 15 39 16 45 12 42 35 19 19

.26

1.45

349.50

.32

40.9

72.7 .78

39.4

161 1.

201,578 54.7

220

2,093

449

686

10.2

446

2,091

.19

12.1 .8

05,150

123

145

21.4

232 2.85

360 34.8

70.7

20.94.27

2.47

S (ft/mi)

28.78

34.48

3.70

105.60

66.53

19.75

15.00

78.67

11.25

7.02

122.50

0.90

2.30

2.60

0.90

2.00

1.11

8.34

4.86

0.69

56.50

11.93

29.67

1.27

1.76

1.42

1.80

1.27

11.34

1.11

5.86

7.40

7.81

11.18

25.99

flood fo

r nonregulated rural gaging stations Continued

I (i

n.)

3.2

3.3

3.3

3.3

3.4

3.4

3.4

3.4

3.4

3.4

3.5

2.7

2.8

3.0

2.8

2.8

2.9

2v9~

2.9

2.9

2.8

2.9

2.8

2.8

2.7

2.7

2.7

2.7

2.7

2.7

2.8

2.8

2.8

2.8

2.8

Region

III I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

II II

2Recurrence interval, in

5 10

25

50years

100

Maximum flood

500

Equivalent years

of re

cord

4.0

4.4

3.2

5.0

4.8

4.1

3.9

4.8

3.8

3.6

4.9

2.1

2.5

2.8

2.2

2.6

2.4

3.t

2.9

2.3

3.8

3.1

3.3

2.3

2.2

2.1

2.2

2.1

2.8

2.1

2.9

3.0

2.9

2.8

3.2

4.5

5.2

3.9

5.5

5.9

4.7

4.3

6.8

4.3

4.0

7.6

2.6

3.0

3.5

2.6

3.5

3.4

4.9

4.0

3.0

5.3

6.1

6.1

3.1

2.5

2.2

3.0

2.7

3.8

2.3

3.1

3.9

4.6

4.4

3.9

5.1

5.8

4.5

6.0

6.5

5.3

4.8

7.7

4.9

4.6

8.6

3.1

3.6

4.1

3.1

4.3

4.1

6.0

4.8

3.6

6.2

8.0

7.6

3.8

2.9

2.6

3.7

3.2

4.6

2.8

3.6

4.7

5.7

5.4

4.5

5.7

6.5

5.3

6.6

7.2

6.0

5.5

8.4

5.6

5.3

9.3

3.8

4.2

4.8

3.8

5.1

5.0

7.1

5.6

4.4

7.1

9.6

8.9

4.6

3.5

3.1

4.5

3.9

5.4

3.3

4.3

5.5

6.7

6.4

5.1

6.0

6.8

5.7

6.9

7.4

6.3

5.9

8.7

5.9

5.7

9.5

4.2

4.6

5.3

4.2

5.6

5.4

7.6

6.1

4.8

7.4

10.2

9.4

5.0

3.9

3.5

5.0

4.3

5.8

3.7

4.7

5.9

7.2

6.8

5.4

6.3

7.0

5.9

7.1

7.6

6.5

6.1

8.8

6.2

6.0

9.5

4.5

4.9

5.6

4.5

5.9

5.8

7.9

6.4

5.2

7.6

10.6

9.7

5.4

4.2

3.7

5.3

4.6

6.1

4.0

4.9

6.2

7.6

7.1

5.7

6.4

7.2

6.3

7.1

7.6

6.7

6.3

8.7

6.4

6.2

9.3

4.9

5.3

5.9

4.9

6.3

6.2

8.1

6.7

5.6

7.7

10.7

9.8

5.8

4.5

4.0

5.7

5.1

6.4

4.3

5.3

6.6

7.9

7.4

5.9

Year

1958

1958

1985

1960

1962

1979

1944

1966

1965

1946

1960

1982

1955

1976

1979

1958

1958

1957

1951

1913

1957

1970

1957

1957

1979

1976

1960

1960

1972

1938

1955

1959

1955

1964

1972

Dis­

charge

(ft3/s

)

182

1,11

029,500

616

796

9,000

15,000

1,33

012,600

23,500

1,280

7,650

1,840

3,610

16,000

5,930

10,400

1,950

22,900

34,000

233

1,71

078

675,900

2,120

2,170

510

3,070

390

5,000

2,480

2,670

3,160

214

204

RI

(yrs)

60 20 90 10 70 20 20 60 20 70 35

>100 25

>100

>100 60

>100

>100 70

>100

45

>100

>100

>100 20 15 45 45

60

70 50 25

>100 25

35

Table 2. Selected basin characteristics/ years of re

cord

, equivalent years of record,

and maximum

Map

No.

232

233

235

236

239

241

243

245

248

249

250

251

252

254

255

256

257

258

259

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

Station

No.

05541750

05542000

05546500

05548150

05549700

05549900

05550300

05550450

05551030

05551050

05551060

05551200

05551520

05551620

05551650

05551700

05551800

05551900

05551930

05554000

05554500

05554600

05555000

05555300

05555400

05555775

05556500

05557000

05557100

05557500

05558000

05558050

05558075

05558500

05559000

Years

of

record

22 4644 22 15 23 17 17 17 18 18 24 19 17 16 25 19 15 16 43

43 18 15 55 21 14 49 48 22 49 11 21 24 33 34

A

(mi2

)

4.52

455

868 13.6

10.8 .0

738.9

16.7

14.07.35

11.5

51.7 5.21

21.6

2.11

70.2 .45

32.6

21.1

186

579.16

1,084

1,251.14

.36

196 86.7 .33

99

485.03

.22

56.2

5.66

S (f

t/mi

)

6.55

4.33

1.11

12.80

8.28

115.10

9.36

11.93

10.91

9.36

10.6

113.31

11.96

12.04

28.83

5.60

87.12

8.79

10.04

5.39

1.11

60.72

1.27

1.37

50.37

24.55

6.07

9.03

97.15

12.72

6.28

228.62

139.39

10.24

53.86

flood for nonregulated rural gaging stations Continued

I (i

n.)

2.9

2.9

2.7

2.8

2.7

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.9

2.8

2.8

2.9

3.0

3.0

3.0

3.0

3.0

2.9

3.0

3.0

3.0

3.0

3.0

3.0

3.0

3.0

3.1

Region

I III II II II II II II II II II II II II II II II III I I I I I I I I I I I I I I I

2Recurrence interval, in

5

10

25

50years

100

Maximum flood

500

Equivalent years of

record

3.1

2.9

1.9

2.9

2.5

3.9

2.8

2.9

2.9

2.7

2.7

2.9

2.9

2.9

3.2

2.6

3.9

2.8

2.9

3.0

2.5

4.3

2.6

2.6

4.0

3.7

3.2

3.3

4.5

3.5

3.2

5.0

4.4

3.3

4.3

3.1

2.9

2.8

3.4

3.6

4.5

3.3

3.9

3.5

4.8

4.9

3.0

3.8

3.7

5.1

2.9

5.1

3.9

3.6

3.3

3.1

4.7

3.1

3.1

6.5

4.6

3.1

4.6

6.2

4.1

4.0

6.1

7.7

5.2

4.7

3.6

3.3

3.5

3.9

4.4

5.0

3.9

4.6

4.1

6.1

6.3

3.4

4.5

4.4

6.1

3.4

5.7

4.7

4.2

3.8

3.8

5.2

3.7

3.7

7.8

5.4

3.6

5.5

7.1

4.8

4.7

6.8

9.1

6.4

5.3

4.3

4.0

4.3

4.5

5.2

5.6

4.5

5.3

4.7

7.3

7.5

4.0

5.2

5.0

7.1

3.9

6.3

5.4

4.8

4.5

4.5

5.8

4.4

4.4

8.8

6.1

4.3

6.3

7.8

5.5

5.5

7.3

10.1

7.5

5.9

4.6

4.3

4.8

4.9

5.6

5.9

4.8

5.7

5.1

7.9

8.1

4.3

5.5

5.4

7.5

4.2

6.6

5.9

5.2

4.9

4.9

6.2

4.9

4.9

9.1

6.5

4.6

6.8

8.1

5.9

5.9

7.6

10.4

7.9

6.3

4.9

4.6

5.1

5.1

5.9

6.0

5.1

6.0

5.3

8.2

8.4

4.5

5.8

5.6

7.7

4.5

6.8

6.1

5.4

5.2

5.2

6.4

5.2

5.2

9.3

6.7

4.9

7.1

8.2

6.2

6.2

7.7

10.4

8.2

6.5

5.2

4.9

5.5

5.4

6.2

6.2

5.3

6.2

5.5

8.5

8.7

4.7

6.0

5.9

7.9

4.7

6.9

6.4

5.7

5.5

5.6

6.6

5.6

5.6

9.2

6.9

5.2

7.3

8.2

6.4

6.5

7.7

10.2

8.4

6.6

Year

1979

1983

1960

1983

1960

1972

1973

1967

1967

1957

1967

1971

1978

1974

1970

1983

1978

1974

1974

1970

1983

1965

1920

1958

1958

1960

1974

1974

1973

1974

1951

1958

1958

1970

1974

Dis­

charge

(ftVs)

173

22,400

7,520

328

378 59

488

410

687

890

954

1,97

0402

640

346

2,060

320

1,580

694

4,550

13,100

163

17,100

33,500

176

98

12,500

20,100

261

7,500

18,000

122

372

6,930

1,94

0

RI

(yrs

) 750

MOO 15 40

407 15 25

>100

>-\oo 15 50 10 45

60 25 60 25 10 35 35 20 45 30 15 40

>100 15 30 25 80 80 80 20

Tabl

e 2. Selected basin

char

acte

rist

ics/

years

of re

cord

, equivalent ye

ars

of re

cord

,

00

and maximum

Map

Stat

ion

No.

No.

277

05559500

280

05561000

283

05563000

284

05563100

285

05563500

286

05564400

287

05564500

288

05565000

289

05566000

290

05566500

291

05567000

292

05567500

293

05567800

294

05568000

297

05568800

298

05568850

299

05569500

300

05569825

301

05570000

304

05570370

306

05571000

307

05572000

308

05572100

309

05572450

310

05572500

311

05574000

312

05574500

313

05575500

314

05575800

316

05576500

317

05577500

318

05577700

319

105578500

320

05579500

321

05579750

Years

of

record

37 27 40 20 43 25 25 20 23 33 36 41 12 63 26 16 43 25 69 14 31 76

21 16 27 32 33 63 18 72 38 24 39 38 18

A

(mi2

)

115 11.2

119.07

297 49 53.1 9.81

6.30

30.5

93.9

767.9

81,089 62.7

1.00

1,072 4.06

1,636 41.2

362

550.10

111

774 11.0

276

562 52.2

2,168

107 1.

50335

214 3.06

S (ft/mi)

6.07

39.86

10.93

76.03

7.50

5.25

4.91

11.88

11.14

4.54

4.22

2.27

30.99

2.48

6.44

37.86

2.27

24.39

1.98

9.95

3.59

2.75

34.11

5.03

2.21

18.8

02.

012.

015.59

1.48

5.39

40.13

2.59

4.65

21.75

flood for

nonregulated rural gaging stations Continued

I (in.)

3.0

3.2

3.2

3.2

3.2

3.1

3.0

3.0

3.0

3.0

3.0

3.0

3.2

3.1

3.1

3.2

3.2

3.2

3.2

3.2

3.0

3.0

3.1

3.1

3.1

3.3

3.2

3.3

3.3

3.2

3.3

3.3

3.1

3.2

3.1

Regi

on

III

III I I I

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

III

2Recurrence

5 10

Equivalent

3.1

4.1

3.6

4.6

3.1

3.2

3.0

3.4

3.2

2.8

3.0

2.6

4.1

2.6

3.1

4.2

2.7

3.8

2.8

3.6

2.9

2.8

4.0

3.1

2.7

3.6

2.9

2.9

3.4

2.7

3.4

4.3

2.8

2.9

3.7

4.3

5.2

5.0

6.5

6.4

4.3

4.9

3.7

6.0

5.6

4.2

4.7

5.0

5.3

5.4

5.4

5.1

6.6

3.9

4.0

3.9

3.6

4.5

5.0

4.4

7.1

3.3

4.2

3.6

2.9

4.2

5.2

4.3

6.0

6.1

5.1

5.9

5.8

7.3

8.4

5.2

6.1

4.2

7.7

7.3

5.1

6.0

5.6

7.1

6.7

6.1

6.7

8.1

4.6

4.5

4.7

4.3

5.1

6.3

5.6

8.9

3.9

5.0

4.1

3.4

4.9

5.9

5.3

7.9

7.3

interval, in

25

50

years

5.9

6.6

6.7

8.1

10.1

6.0

7.2

4.8

9.2

8.9

6.0

7.4

6.3

8.7

8.0

6.8

8.2

9.2

5.5

5.2

5.6

5.1

5.7

7.4

6.7

10.3

4.6

5.9

4.8

4.1

5.6

6.5

6.3

9.6

8.4

years

100

Maximum flood

500

of record

6.3

6.9

7.1

8.3

10.8

6.4

7.8

5.2

9.8

9.6

6.4

8.0

6.6

9.5

8.5

7.2

8.8

9.6

5.9

5.6

6.0

5.5

6.0

7.9

7.2

10.8

5.0

6.4

5.1

4.4

6.0

6.8

6.8

10.3

8.8

6.6

7.1

7.4

8.4

1.2

6.7

8.1

5.4

10.1

10.1 6.7

8.4

6.8

10.0

8.8

7.3

9.3

978

6.2

5.8

6.3

5.8

6.2

8.2

7.6

11.0 5.2

6.7

5.4

4.7

6.3

7.0

7.2

10.7

9.0

6.9

7.2

7.5

8.4

11.2

7.0

8.4

5.7

10.2

10.3

7.0

8.8

7.0

10.3

9.0

7.4

9.6

9.8

6.6

6.1

6.6

6.1

6.4

8.5

7.9

10.95.6

7.0

5.7

5.0

6.6

7.1

7.5

10.9

9.0

Year

1954

1980

1967

1959

1974

1980

1947

1951

1951

1951

1951

1983

1968

1983

1974

1975

1974

1967

1924

1974

1956

1927

1961

1968

1974

1957

1957

1957

1983

1943

1983

1979

1968

1943

1956

Dis­

charge

(ftVs)

5,750

5,100

27,500

246

48,500

2,600

3,900

1,690

1,470

5,300

10,900

44,800

446

51,000

6,540

391

41,000

1,460

37,300

1,220

14,600

19,000 64

5,660

16,000

8,600

13,000

21,500

3,300

68,700

8,080

660

24,500

29,000

2,400

RI

(yrs)

40MOO 45

>100

>100 40

>100 30

>100

>100

>100

>100 15

>100

>100 25

>100 90

804

60

90 20 35 25

>100 90

>100 8

>100 35 20

>100

>100

>100

Table

2. Selected ba

sin

characteristics, ye

ars

of re

cord

, equivalent years

of re

cord

,and maximum

Map

Stat

ion

No.

No.

322

05580000

323

05580500

326

05581500

327

05582000

328

05582200

329

05582500

330

05583000

331

05584400

332

05584450

333

05584500

335

05585000

336

05585220

338

05585700

339

05586000

340

05586200

341

05586350

342

05586500

343

05586850

344

05587000

345

05587850

346

05587900

347

05588000

348

05589500

350

05590000

351

05590400

352

05590500

353

05590800

354

05591200

355

05591500

356

05591750

357

205592000

358

05592025

360

05592300

361

205592500

362

05592700

Years

of

record

38

41 41 44

21 32 68

25 16 41 65

25

21 36 25 12 35 25 58

25 17 45

46 41 15 11 13 15 32 20 34 21 24 59

25

A

(mi2

)

227

306

333

1,084.94

26.5

5,093 26.3 .60

655

1,29

3 3.58

.15

29.1 .4

9

1.82

2.30

.02

868.45

212 36.7

22.6

12.4

109

126

149

473 8.05

.70

1,054.2

047.9

1,940.14

S (ft/mi)

6.23

5.12

5.76

2.22

23.76

2.16

1.27

5.76

91.87

3.70

1.85

27.24

48.58

9.03

131.47

53.86

24.29

63.36

2.32

42.50

5.12

7.92

11.09

17.16

2.46

2.22

2.67

1.52

5.23

18.32

1.43

63.89

6.60

1.37

27.09

flood

for

nonregulated ru

ral

gaging stations Continued

I (i

n.)

3.1

3.2

3.2

3.2

3.3

3.3

3.2

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.4

3. 3. 3. 3. 3. 3.4

3.5

3.5

3.0

3.1

3.1

3.1

3.1

3.2

3.2

3.1

3.2

3.3

3.2

3.3

Regi

on

III

III

III

III

III

III

III

III

III

III

III

III

III I I I I I I I I I I I I I I I I I I I I I I

2Recurrence in

terv

al,

in

5 10

25

50

Equivalent

3.1

3.2

3.1

2.9

4.0

2.9

2.7

3.4

4.8

3.1

2.8

4.1

4.4

3.6

5.2

4.7

4.1

4.4

3.1

4.5

3.4

3C

O

3.8

3.5

2.9

2.9

2.9

2.7

3.3

3.9

2.7

4.5

3.5

2.6

4.1

5.4

4.8

5.6

3.8

5.5

3.2

2.9

4.2

5.6

4.2

4.2

4.8

5.5

3.7

5.2

5.2

6.0

7.2

3.5

5.4

3.4

5.4

5.8

4.0

3.7

4.1

3.3

4.0

4.4

3.0

6.5

4.2

4.6

4.9

6.8

5.8

7.1

4.5

6.3

3.7

3.5

4.9

6.1

4.9

5.1

5.4

6.2

4.2

5.7

5.8

7.0

8.4

4.1

6.0

3.9

6.3

7.1

4.9

4.3

5.0

3.9

4.6

5.0

3.6

7.4

4.9

6.0

5.6

years

8.0

6.8

8.5

5.3

7.1

4.4

4.1

5.6

6.7

5.7

6.0

6.0

6.8

4.8

6.2

6.4

7.8

9.2

4.8

6.7

4.5

7.2

8.2

5.8

5.1

5.9

4.6

5.4

5.6

4.2

8.1

5.6

7.3

6.2

years

100

Maximum flood

500

of record

8.6

7.3

9.0

5.7

7.4

4.7

4.5

6.0

7.0

6.2

6.5

6.4

7.1

5.2

6.5

6.7

8.2

9.5

5.2

7.0

4.9

7.5

8.7

6.2

5.5

6.4

5.0

5.8

6.0

4.6

8.4

6.0

8.0

6.5

8.9

7.6

9.4

6.0

7.6

5.0

4.7

6.3

7.1

6.4

6.9

6.6

7.3

5.5

6.7

6.9

8.3

9.5

5.5

7.2

5.2

8 A

U

7.8

8.9

6.5

5.9

6.7

5.3

6.0

6.2

4.9

8.5

6.3

8.4

6.7

9.1

7.8

9.5

6.3

7.7

5.2

5.1

6.5

7.2

6.7

7.2

6.7

7.3

5.7

6.8

7.0

8.4

9.4

5.8

7.3

5.4

8O»Z

7.9

9.0

6.9

6.2

7.0

5.7

6.3

6.4

5.3

8.5

6.5

8.8

6.9

Year

1981

1983

1983

1943

1965

1979

1943

1980

1961

1985

1985

1958

1961

1977

1961

1966

1957

1973

1943

1958

1979

1946

1957

1968

1974

1959

1979

1985

1974

1978

1957

1960

1970

1957

1957

Dis­

charge

(ft3/s)

24,600

23,300

41,200

41,200

1,50

0

534

123,

000

3,500

539

38,900

28,000

1,01

0 744,700

730

1,13

01,700 42

40,0

00 791

8,20

09,340

10,200

1,490

3,310

4,40

04,

030

9,250

1,46

0150

25,900 450

7,48

062,700 132

RI

(yrs

)

>100

>100

>100 50

>100

8>100

>100 25

>100 70 10 10 90 15 10

>100 30 80

>100

9 90

>100 40 15 15 15 15 50 20 30 45 25

>100 30

Tabl

e 2. Selected basin

characteristics, ye

ars

of re

cord

, eq

uiva

lent

years

of re

cord

,and maximum flood

for

nonregulated rural

gaging stations Continued

Map

Stat

ion

No.

No.

363

05592800

364

305593000

365

05593520

366

05593575

367

05593600

368

05593700

369

05593900

370

05594000

371

05594090

373

05594200

374

05594330

375

05594450

376

05594800

377

**05595000

378

05595200

379

05595500

380

05595510

382

05595800

383

05596000

384

05596100

385

505597000

387

05597500

388

05599000

389

505599500

390

05599560

392

05599640

393

05599800

394

05600000

Years

of

reco

rd

15 43 11 18 25 13 22 44 10 17 12 19 15 46 16 23 14~~22~

25 17 60 34 36 43 17 25 12 44

A

(mi2

)

152

2,71

925

4 84.3

17.3 .3

455.5

735

124 1.

9

72.4

154

464

5,181

129 17.8 1.22

21.1

502 1.

03

794 31.7

292

2,169 1.

94 .43

.09

32.2

S (f

t/mi

)

5.83

1.27

2.73

4.42

4.28

34.06

5.54

2.32

3.31

17.16

5.72

4.00

2.34

1.11

6.43

9.77

35.2

214

.52

1.80

39.02

1.53

8.08

2.64

1.00

55.32

111.94

186.91

11.3

0

I (i

n.)

3.3

3.2

3.4

3.4

3.3

3.3

3.3

3.4

3.4

3.5

3.5

3.5

3.5

3.3

3.5

3.5

3.5

3.4

3.4

3.5

3.4

3.5

3.5

3.5

3.6

3.6

3.6

3.5

Regi

on I I I I I I I I I I I I I I I I IIV IV IV IVIV

IV

IV

IV

IV

IV

IV

2Recurrence interval, in

5 10

25

50

Equivalent

3.4

2.7

3.1

3.4

3.3

4.3

3.4

3.1

3.2

4.0

3.4

3.3

3.1

2.7

3.6

3.7

4.3

3.7

2.7

4.3

2.7

3.5

3.0

2.6

4.3

5.0

5.2

3.4

3.9

3.5

3.3

3.9

3.7

5.9

4.6

4.0

3.9

5.7

5.2

3.5

3.2

3.5

4.4

5.8

7.0

5.0

4.2

5.2

3.0

4.0

4.3

2.8

7.2

5.6

7.5

6.5

4.5

4.1

3.8

4.5

4.2

6.8

5.4

4.7

4.5

6.7

6.3

4.0

3.7

4.3

5.0

6.9

8.3

5.8

5.1

5.8

3.5

4.6

5.2

3.3

8.4

6.1

8.3

8.2

years

5.1

4.9

4.5

5.2

4.9

7.5

6.3

5.5

5.2

7.5

7.3

4.6

4.3

5.1

5.7

7.9

9.2

6.5

6.1

6.4

4.1

5.2

6.0

3.9

9.2

6.6

8.8

9.6

years

100

Maximum flood

500

of record

5.5

5.4

4.8

5.6

5.3

7.9

6.7

5.9

5.6

7.8

7.7

5.0

4.7

5.5

6.1

8.3

9.5

6.8

6.6

6.6

4.4

5.5

6.5

4.2

9.5

6.8

8.9

10.1

5.8

5.7

5.1

5.9

5.5

8.0

7.0

6.2

5.9

8.0

8.0

5.2

4.9

5.8

6.4

8.6

9.6

7.Q

6.9

6.8

4.6

5.8

6.7

4.4

9.5

6.9

8.9

10.4

6.1

6.1

5.4

6.1

5.8

8.1

7.2

6.5

6.2

8.1

8.1

5.5

5.2

6.2

6.6

8.7

9.5

7.2

7.1

6.9

4.9

6.0

7.0

4.7

9.4

7.0

8.7

10.4

Year

1983

1943

1985

1968

1973

1966

1967

1943

1973

1968

1979

1979

1979

1943

1973

1968

1969

1961

1961

1970

1961

1983

1961

1961

1969

1965

1961

1943

Dis­

charge

(ft3/s)

17,900

54,400

8,640

10,900

2,140

356

5,910

52,000

10,500

966

5,520

10,600

9,200

83,000

14,900

7,760

777

2,530

38,600

835

42,900

3,570

18,800

33,300

3,000

605

148

7,200

RI

(yrs)

35 706

50 40 70 45

>-\O

Q 30 25 15 205

35 50 90 25 20>1

00 40

>100 15 40 35

>100 20 10

>100

1 Regulated

sinc

e 1977 by

Cl

into

n Lake Reservior.

2 Re

gula

ted

sinc

e 19

69 by

Sh

elby

vill

e Re

serv

ior.

3 Re

gula

ted

sinc

e 19

67 by Ca

rlyl

e Reservior.

"* Re

gula

ted

since

1967

by up

stre

am reservoirs.

5 Re

gula

ted

since

1970 by Re

nd Lake Reservior.

Table 3. Regional factors/ Rf

[T-year, recurrence interval in years]

Flood, T-year

2

5

10

25

50

100

500

I

1.057

1.053

1.053

1.051

1.050

1.048

1.044

II

0.578

.576

.574

.570

.567

.563

.555

Region

III

0.805

.822

.837

.853

.862

.870

.886

IV

0.983

.894

.859

.826

.806

.790

.759

Table 4. Accuracy of estimating equations/

QT = a Ab Sc (1-2.5) d Rf

[T-year, recurrence interval in years]

Standard error of prediction

Flood T-year

2

5

10

25

50

100

500

Percent

34.9

33.0

34.9

38.0

40.6

43.4

50.3

Equivalent years of record

3.36

4.54

5.36

6.18

6.58

6.84

7.05

71

Table 5. Selected statistical characteristics for annual peak discharges for nonregulated rural gaging stations

[The

systematic-record and WRC-estimated frequency curves can

be reconstructed using logarithmic

mean, standard deviation, and skew,

and the standard Pearson Type III tables-

WRC, Interagency Advisory Committee on Water Da

ta,

formerly Water Resources Council]

fo

Log-Pearson Type II

I statistics, in log units

Systematic record

Map

No. 1 2 3 5 6 7 8 9 10 1 1

12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

27 28 29 30 31

Station

No.

03336100

03336500

03336900

03337500

03338000

03338100

03338500

03338800

03339000

03341700

03341900

03343400

Q3344000

03344250

03344425

03344500

03345500

03346000

03378000

03378635

03378650

03378900

03378980

03379500

03379650

03380300

03380350

03380400

03380450

03380475

Station name

Big Four Ditch Trib near Paxton,

111.

Bluegrass Creek at Potomac, 111.

Salt Fork near St.

Joseph, 111.

Saline Branch at Urbana, 111.

Salt Fork near Homer, 111.

Salt Fork Trib near Catlin, 11

1.Vermilion River near Ca

tlin

, 11

1.N F Vermilion River Trib nr

Danville, 111.

Vermilion River near Danville, 11

1.Big Creek Trib near Dudley, 111.

Raccoon Creek Trib near Annapolis, 111.

Embarras River near Camargo, 11

1.Embarras River near Di

ona,

111.

Embarras River Trib near Greenup, 111.

Muddy Creek Trib at Woodbury, 111.

Range Creek near Ca

sey,

11

1.Embarras River at

Ste. Marie, 11

1.North Fork Embarras River near Oblong,

111.

Bonpas Creek at

Br

owns

, 111.

Little Wabash River near Effingham, 111.

Second Creek Trib at Keptown, 11

1.Little Wabash River at Louisville, 111.

Little Wabash River Trib at Clay City,

111.

Little Wabash River below Clay City,

111.

Madden Creek near West Salem, 11

1.

Dums Creek Tributary near lu

ka,

111.

Skillet Fork near lu

ka.

111.

Horse Creek Tributary near Ca

rtte

r, 111.

White Feather Creek near Marlow,

111.

Horse Creek near Keenes, 111.

Mean

2.044

3.255

3.398

3.088

3.551

2.219

3.924

2.46

14.116

2.263

1.23

83.461

3.950

1.356

1.36

8

2.933

4.119

3.823

3.442

3.728

2.360

4.045

2.089

4.098

2.620

1.616

3.682

2.34

12.119

3.567

Standard

deviation

0.255

0.238

0.204

0.254

0.245

0.433

0.279

0.319

0.25

10.242

0.307

0.247

0.217

0.262

0.386

0.359

0.324

0.376

0.220

0.161

0.269

0.230

0.344

0.314

0.242

0.239

0.320

0.263

0.228

0.264

Skew

-0.671

-0.206

0.340

-0.502

-0.687

-1.299

0.182

0.297

-0.612

0.673

-0.482

-1.079

0.133

0.042

0.171

-0.775

-1.372

-1.434

-1.250

0.011

0.338

-0.323

-0.606

-0.353

0.562

-0.116

-0.267

0.228

-0.272

-0.246

WRC estimated

Mean

2.044

3.255

3.398

3.088

3.56

1

2.245

3.924

2.46

14.124

2.263

1.23

83.473

3.950

1.356

1.368

2.955

4.135

3.846

3.464

3.728

2.360

4.045

2.089

4.105

2.620

1.61

63.682

2.34

12.119

3.565

Standard

deviation

0.255

0.238

0.204

0.254

0.225

0.386

0.279

0.319

0.233

0.242

0.307

0.227

0.217

0.262

0.386

0.306

0.275

0.312

0.167

0.161

0.269

0.230

0.344

0.298

0.242

0.239

0.320

0.263

0.228

0.208

Skew

-0.545

-0.275

0.034

-0.465

-0.387

-0.730

-0.094

-0.026

-0.285

0.070

-0.446

-0.694

-0.106

-0.134

-0.106

-0.003

-0.208

-0.409

0.-0.178

-0.039

-0.357

-0.503

-0.163

0.098

-0.229

-0.328

-0.130

-0.321

-0.186

Table 5. Selected statistical characteristics fo

r annual peak discharges fo

r nonregulated rural gaging stations Continued

OJ

Log-Pearson Type III

statistics, in log units

Systematic record

Map

No. 32 33 34 35 36 37 39

40

41 42 4345

464748

49 50

51 5253

545556

57

58 59

60

61 62

63 64 65

66 67

68

Station

No.

03380500

03381500

03381600

03382025

03382100

03382170

03382510

03382520

03384450

03385000

03385500

03612000

03612200

03614000

04087300

04087400

05414820

05415000

05415500

05418750

05418800

05419000

05420000

05430500

05431500

05434500

05435000

05435500

05435650

05436500

05436900

05437000

05437500

05437600

05437950

Station na

me

Skillet Fork at

Wayne City,

111.

Little Wabash River at

Carrai,

111.

Little Wabash River Trib nr New Ha

ven,

11

1.Little Saline Creek Trib nr Goreville, 111.

South Fo

rk Saline River nr Carrier Mills, 111.

Brushy Creek near Ha

rco,

111.

Eagle Creek near Equality, 111.

Black Branch Trib near Junction, 111.

Lusk Creek near Eddyville, 111.

Hayes Creek at

Glendale, 111.

Lake Glendale Inlet near Dixon Springs, 111.

Cache River

at Fo

rman

, 111.

Q Ditch Trib near Ch

oat,

111.

Hess Bayou Trib near Mound City, 11

1.Lake Michigan Trib at Winthrop Harbor, 11

1.

Kellogg Ravine at Zi

on,

111.

Sinsinawa River near Menominee, 11

1.Galena River at

Buncombe, Wis.

East Fo

rk Galena River at Council Hill,

111.

South Fork Apple

River near Nora,

111.

Mill Creek Trib near Scales Mo

und,

111.

Apple River near Hanover, 11

1.Plum River below Carroll Creek nr Savanna, 111.

Rock River at

Afton, Wi

s.Turtle Creek near Clinton, Wi

s.

Pecatonica River at Martintown, Wi

s.Cedar Creek near Wins low

, 11

1.Pecatonica River at Freeport, 111.

Lost Creek Trib near Shannon, 111.

Sugar River near Brodhead, Wi

s.

Otter Creek Trib near Durand,

111.

Pecatonica River at Shirland, 11

1.Rock River at

Ro

ckto

n, 111.

Rock River Trib near Rockton, 111.

Kishwaukee River

near Huntley, 111.

Mean

3.898

4.153

1.948

2.407

3.438

3.056

2.714

2.186

3.751

3.351

2.748

3.568

2.134

2.643

1.908

2.370

3.475

3.690

3.300

2.266

2.393

3.717

3.540

3.785

3.300

3.750

1.978

3.756

2.417

3.533

1.706

3.912

4.143

2.130

2.097

Standard

deviation

0.310

0.224

0.295

0.213

0.191

0.161

0.075

0.353

0.215

0.262

0.261

0.267

0.260

0.168

0.308

0.289

0.334

0.241

0.382

0.366

0.287

0.206

0.275

0.196

0.369

0.245

0.572

0.249

0.255

0.324

0.335

0.208

0.234

0.331

0.120

Skew

-0.452

-0.193

0.314

-2.063

-0.707

0.819

-0.644

0.172

0.444

0.198

-0.433

-0.320

0.182

-0.406

0.608

0.651

0.404

0.841

0.342

-1.060

-0.177

-0.003

-0.070

-0.730

-0.187

-0.041

-0.470

0.045

-1.399

-0.217

0.258

-0.345

-1.272

-0.859

-0.612

WRC estimated

Mean

3.907

4.161

1.94

82.434

3.451

3.056

2.714

2.186

3.75

13.351

2.748

3.568

2.134

2.657

1.908

2.370

3.475

3.690

3.300

2.29

3

2.393

3.717

3.540

3.795

3.300

3.750

1.978

3.756

2.449

3.533

1.706

3.912

4.155

2.130

2.097

Standard

deviation

0.29

10.209

0.295

0.139

0.165

0.161

0.075

0.353

0.215

0.262

0.261

0.267

0.260

0.142

0.308

0.289

0.334

0.24

10.382

0.31

1

0.287

0.206

0.275

0.185

0.369

0.245

0.572

0.249

0.183

0.324

0.335

0.208

0.200

0.33

10.120

Skew

-0.203

0.029

-0.036

-0.079

-0.247

0.130

-0.480

-0.118

0.050

0.018

-0.387

-0.321

-0.041

-0.009

0.071

0.062

-0.002

0.37

10.

051

-0.502

-0.280

-0.103

-0.175

-0.393

-0.253

-0.140

-0.439

-0.044

-0.197

-0.258

-0.0

51-0.366

-0.355

-0.600

-0.4

91

Table

5. Selected statistical

char

acte

rist

ics

for

annual peak discharges for

nonregulated ru

ral

gaging stations Continued

Log-Pearson Type II

I st

atis

tics

, in

log

units

Systematic re

cord

Map

No. 69

70

7172

73

74

757677

78

79

80

8182

83

84

8586

8788

89

90

919394

95

96979899

100

101

102

103

104

Station

No.

05438250

05438300

05438390

05438500

05438850

05439000

05439500

05439550

05440000

05440500

05440650

05440900

05441000

05441500

05442000

05443500

05444000

05444100

05446000

05446500

05446950

05447000

05447050

05447350

05447500

05448000

05448050

05466000

05466500

05467000

05467500

05468000

05468500

05469000

05469500

Station name

Coon Creek

at Ri

ley,

11

1.Lawrence Creek

Trib ne

ar Harvard, 111.

Piscasaw Cr below

Moke

ler

Cr nr Ca

pron

, 11

1.Kishwaukee River

at Be

lvid

ere,

11

1.Md Br of

So Br

Kishwaukee River

nr Ma

lta,

11

1.

South

Branch Kishwaukee River

at De

Ka

lb,

111.

Sout

h Br

anch

Ki

shwaukee River

nr Fairdale,

111.

So Br

Kishwaukee

Ri

ver

Trib

nr Irene, 111.

Kishwaukee River

near Perryville,

111.

Killbuck Creek

near Monroe Ce

nter

, 11

1.

Stil

lman

Creek

Trib near Holcomb, 11

1.Le

af River

Trib ne

ar Forreston, 11

1.Le

af Ri

ver

at Le

af Ri

ver,

11

1.Rock River

at Or

egon

, 11

1.Kyte Ri

ver

near

Flagg Ce

nter

, 111.

Rock

River

at Co

roo,

111.

Elkh

orn

Creek

near

Penrose, 11

1.Sp

ring

Cr

eek

Trib near Co

leta

, 11

1.Rock Creek

at Mo

rris

on,

111.

Rock

Ri

ver

near

Jo

slin

, 11

1.

Green

River

Trib

ne

ar Am

boy,

111.

Green

River

at Amboy, 111.

Green

Rive

r Trib

No.

2 nr Oh

io,

ill.

Mud

Cree

k Trib ne

ar At

kins

on,

111.

Green River

near

Geneseo, 11

1.

Mill Cr

eek

at Mi

lan,

111.

Sand Creek near Milan, 111.

Edwa

rds

River

near

Orion, 11

1.Ed

ward

s River

near

New

Bost

on,

111.

Pope Creek

near

Ke

iths

burg

, 11

1.

Henderson

Creek

near

Li

ttle

York,

111.

North

Henderson

Creek

near Sea ton. 11

1.Cedar

Creek

at Li

ttle

York,

111.

Hend

erso

n Cr

eek

near Oquawka, 11

1.South

Henderson

Creek

at Biggsville,

111.

Mean

3.047

1.87

83.206

3.552

2.129

2.906

3.564

1.880

3.832

3.340

1.895

1.744

3.418

4.328

3.096

4.365

3.455

2.418

3.312

4.345

1.944

3.418

2.126

2.240

3.744

3.420

1.547

3.485

3.593

3.355

3.380

3.030

3.347

3.693

3.265

Standard

deviation

0.370

0.277

0.275

0.308

0.291

0.257

0.256

0.469

0.286

0.345

0.307

0.323

0.350

0.224

0.170

0.223

0.245

0.309

0.179

0.209

0.424

0.262

0.314

0.357

0.208

0.330

0.418

0.243

0.247

0.249

0.298

0.149

0.365

0.266

0.297

Skew

-0.984

-0.178

-1.265

-0.321

-0.719

1.038

-0.930

-0.279

-0.613

-1.043

-0.049

0.455

-0.587

0.338

0.321

-0.830

-0.9T6

-0.383

0.233

-0.456

0.495

-1.027

-0.801

-0.448

-0.960

-0.472

0.181

-1.292

-0.365

-0.113

0.761

-0.791

-0.144

0.439

0.813

WRC estimated

Mean

3.065

1.878

3.251

3.552

2.149

2.906

3.564

1.880

3.832

3.340

1.895

1.744

3.418

4.328

3.096

4.370

3.463

2.418

3.312

4.345

1.944

3.428

2.160

2.286

3.750

3.420

1.547

3.503

3.593

3.355

3.375

3.030

3.347

3.693

3-265

Standard

deviation

0.338

0.277

0.181

0.308

0.255

0.257

0.256

0.469

0.286

0.345

0.307

0.323

0.350

0.224

0.170

0.213

0.227

0.309

0.179

0.209

0.424

0.245

0.246

0.277

0.194

0.330

0.418

0.205

0.247

0.249

0.290

0.149

0.365

0.266

0.297

Skew

-0.633

-0.281

-0.059

-0.345

-0.341

0.146

-0.720

-0.339

-0.540

-0.757

-0.216

0.062

-0.521

-0.121

-0.100

-0.615

-0.574

-0.393

0.028

-0.438

0.015

-0.706

-0.074

0.159

-0.640

-0.449

-0.060

-0.707

-0.375

-0.188

0.310

-0.547

-0.219

0.184

0.344

Tabl

e 5. Selected st

atis

tica

l characteristics

for

annual peak discharges fo

r no

nreg

ulat

ed ru

ral

gaging stations Continued

-J

Ul

Log-Pearson Type III

statistics, in

log

units

Systematic record

Map

No.

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

132

134

139

144

189

190

213

225

226

Station

No.

05469750

05495200

05495500

05496900

05501500

05502020

05502040

05502120

05512500

05513000

05513200

05518000

05519500

05520000

05520500

05524500

05525000

05525050

05525500

05526000

05526150

05526500

05527050

05527500

05527800

05527840

05527900

05528000

05528360

05529000

05536178

05536190

05537500

05540110

05540140

Station name

Ellison Creek Trib near Roseville, 111.

Little Creek near Breckenridge, 11

1.Bear Creek near Marcelline, 111.

Homan Creek Trib near Quincy, 11

1.Burton Creek Trib near Burton, 111.

Hadley Creek near Barry, 111.

Hadley Creek at Kinderhook, 111.

Riser Creek Trib near Barry, 111.

Bay Creek at Pittsfield, 111.

Bay Creek at Ne

bo,

111.

Salt Spring Creek near Gilead, 11

1.Kankakee River at Shelby, Ind.

West Creek near Schneider, Ind.

Singleton Ditch at

Illinoi, 111.

Kankakee River at

Mo

me ne

e, 111.

Iroquois River near Foresman, Ind.

Iroquois River at

Iroquois, 111.

Eastburn Hollow near Sheldon, 11

1.Sugar Creek at

Milford, 111.

Iroquois River near Chebasne, 111.

Kankakee River Trib near Bourbonnais, 111.

Terry Creek near Custer Park,

111.

Prairie Creek near Frankfort, 111.

Kankakee River near Wilmington, 111.

Des Plaines River at

Russell, 11

1.

Des Plaines River at Wadsworth, 11

1.North Mill Creek at

Hickory Corners, 111.

Des Plaines River near Gurnee, 111.

Aptakisic Creek at

Aptakisic, 111.

Des Plaines River near De

s Plaines, 111.

Plum Creek ne

ar Dy

er,

Ind.

Hart Ditch at Mu

nste

r, Ind.

Long Run near Le

mont

, 11

1.Ferry Creek at

Warrenville, 111.

East Br

Du

Page River

nr Bloomingdale, 111.

Mean

1.712

2.575

3.936

2.372

2.191

3.623

3.774

2.544

3.647

3.808

2.439

3.617

2.946

3.215

3.800

3.432

3.565

2.381

3.807

4.087

1.506

2.192

1.926

4.359

2.787

2.863

2.266

3.115

2.031

3.305

3.010

3.117

2.768

1.938

1.750

Standard

deviation

0.299

0.347

0.272

0.345

0.406

0.263

0.296

0.327

0.332

0.323

0.320

0.114

0.248

0.153

0.157

0.163

0.186

0.400

0.277

0.205

0.484

0.348

0.384

0.224

0.369

0.371

0.228

0.204

0.297

0.217

0.254

0.181

0.308

0.202

0.303

Skew

-0.545

-0.377

-0.375

-0.585

-0.238

-1.280

-0.833

-0.572

-0.724

-0.776

0.307

-0.587

-1.263

-1.842

-0.453

-0.429

-0.077

0.444

-0.110

-0.532

0.067

0.641

0.121

-0.162

-0.617

-1.134

-0.962

-0.262

0.014

-0.819

-1.094

-0.160

0.235

0.482

-0.307

WRC estimated

Mean

1.712

2.575

3.936

2.372

2.191

3.642

3.785

2.564

3.658

3.820

2.439

3.620

2.967

3.229

3.800

3.438

3.565

2.38

13.807

4.098

1.506

2.215

1.963

4.359

2.787

2.863

2.313

3.115

2.031

3.320

3.049

3.117

2.768

1.938

1.75

0

Standard

deviation

0.299

0.347

0.272

0.345

0.406

0.217

0.275

0.285

0.312

0.300

0.320

0.107

0.201

0.115

0.157

0.151

0.186

0.400

0.277

0.199

0.484

0.306

0.317

0.224

0.369

0.371

0.204

0.204

0.297

0.210

0.219

0.181

0.308

0.202

0.303

Skew

-0.480

-0.387

-0.384

-0.494

-0.324

-0.441

-0.534

-0.099

-0.485

-0.477

0.002

-0.378

-0.425

-0.373

-0.440

-0.193

-0.174

0.005

-0.204

-0.260

-0.121

0.322

0.214

-0.213

-0.517

-0.674

-0.146

-0.308

-0.193

-0.520

-0.580

-0.233

0.013

0.040

-0.352

Table 5. Selected statistical characteristics for

annual peak discharges fo

r nonregulated rural gaging stations Continued

Log-Pearson Type II

I statistics, in

log units

Systematic record

Map

No.

232

233

235

236

239

241

243

245

248

249

250

251

252

254

255

256

257

258

259

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

Station

No.

05541750

05542000

05546500

05548150

05549700

05549900

05550300

05550450

05551030

05551050

05551060

05551200

05551520

05551620

05551650

05551700

05551800

05551900

05551930

05554000

05554500

05554600

05555000

05555300

05555400

05555775

05556500

05557000

05557100

05557500

05558000

05558050

05558075

05558500

05559000

Station name

Mazon River Trib near Gardner, 11

1.Mazon River near Coal City,

111.

Fox River at

Wi

lmot

, Wi

s.North Br

Nippers ink

Creek nr Genoa City,

Wis.

Mutton Creek at

Island Lake,

111.

Fox River Tributary near Gary, 11

1.Tyler Creek at Elgin, 111.

Poplar Creek near Ontarioville, 111.

Brewster Creek at

Valley View, 111.

Norton Creek near Wa

yne,

11

1.

Norton Creek near St.

Charles, 111.

Person Creek near St.

Charles, 111.

Indian Creek near North Aurora, 111.

Blackberry Creek near Kaneville, 111.

Lake Run Tributary near Batavia, 111.

Blackberry Creek near Yorkville, 111.

Fox River Trib No.

2 near Fox, 11

1.E

Branch Big Ro

ck Creek near Big Rock,

111.

Welch Creek near Big Rock,

ill.

North Fork Vermilion River near Charlotte, 11

1.

Vermilion River at

Pontiac, 11

1.Mud Creek Tributary near Odell, 11

1.Vermilion River at Streator, 111.

Vermilion River near Leonore, 11

1.Vermilion River Trib at

Lowell, 111.

Vermilion Creek Trib at

Meriden, 111.

Big Bureau Creek at Princeton, 111.

West Bureau Creek at Wyanet, 111.

West Bureau Creek Trib near Wyanet, 111.

East Bureau Creek near Bureau, 111.

Big Bureau Creek at Bureau, 111.

Coffee Creek Trib near Florid, 111.

Coffee Creek Trib near Hennepin, 11

1.Crow Creek (W

est) near Henry, 111.

Gimlet Creek at

Spar lan

d, 111.

Mean

1.987

3.892

3.418

2.23

11.849

1.032

2.488

2.317

2.35

11.950

2.102

2.925

2.112

2.616

1.70

2

2.812

1.802

2.799

2.494

3.336

3.705

1.656

3.877

4.051

1.410

1.588

3.587

3.434

1.900

3.355

3.895

1.249

1.78

53.180

2.907

Standard

deviation

0.227

0.298

0.203

0.171

0.339

0.450

0.186

0.172

0.307

0.334

0.308

0.292

0.263

0.134

0.432

0.282

0.486

0.210

0.197

0.252

0.238

0.350

0.252

0.276

0.505

0.309

0.325

0.312

0.354

0.305

0.205

0.429

0.335

0.295

0.251

Skew

-1.702

-1.128

0.105

-0.383

0.097

-0.415

-2.472

0.001

-0.306

0.586

1.054

-1.033

-0.084

-0.713

0.602

-0.645

-0.120

0.174

-0.197

-0.663

-0.310

-0.719

-0.380

-0.405

0.498

-0.651

-1.021

-0.089

0.036

-0.399

-0.168

-0.254

0.643

0.257

-0.608

WRC estimated

Mean

2.008

3.90

13.418

2.231

1.889

1.032

2.517

2.317

2.351

1.99

3

2.102

2.940

2.112

2.626

1.702

2.812

1.802

2.799

2.494

3.336

3.71

11.656

3.877

4.051

1.410

1.61

33.587

3.434

1.900

3.355

3.895

1.249

1.785

3.180

2.907

Standard

deviation

0.178

0.28

10.203

0.171

0.370

0.450

0.104

0.172

0.307

0.387

0.296

0.266

0.263

0.115

0.432

0*282

0.486

0.210

0.197

0.252

0.240

0.350

0.252

0.276

0.505

0.265

0.325

0.312

0.354

0.305

0.205

0.429

0.335

0.295

0.251

Skew

-0.687

-0.761

-0.041

-0.391

-0.091

-0.408

-0.395

-0.193

-0.354

0.213

0.225

-0.656

-0.231

-0.272

0.057

-0.532

-0.251

-0.128

-0.301

-0.568

-0.348

-0.550

-0.391

-0.404

0.066

-0.289

-0.767

-0.173

-0.150

-0.400

-0.306

-0.321

0.154

0.018

-0.525

Table 5. Selected statistical characteristics fo

r annual peak discharges for

nonregulated rural gaging stations Continued

Log-Pearson Type II

I statistics, in log

units

Systematic record

Map

No.

277

280

283

284

285

286

287

288

289

290

291

292

293

294

297

298

299

300

301

304

306

307

308

309

310

311

312

313

314

316

317

318

319

320

321

Station

No.

05559500

05561000

05563000

05563100

05563500

05564400

05564500

05565000

05566000

05566500

05567000

05567500

05567800

05568000

05568800

05568850

05569500

05569825

05570000

05570370

05571000

05572000

05572100

05572450

05572500

05574000

05574500

05575500

05575800

05576500

05577500

05577700

05578500

05579500

05579750

Station na

me

Crow Creek ne

ar Washburn, 111.

Ackerman Creek at

Farmdale, 111.

Kickapoo Creek near Kickapoo, 111.

Kickapoo Creek Trib near Kickapoo, 111.

Kickapoo Creek at Peoria,

111.

Money Creek ne

ar Towanda, 111.

Money Creek above Lake Bloomington, 111.

Hickory Creek above Lake Bloomington, 11

1.East Branch Panther Creek near Gridley, 111.

East Branch Panther Creek at El Pa

so,

111.

Panther Creek near El Paso,

111.

Mackinaw River ne

ar Congerville, 111.

Indian Creek Trib near Hopedale, 111.

Mackinaw River near Green Valley, 111.

Indian Creek ne

ar Wyoming, 111.

Forman Creek Trib near Victoria, 111.

Spoon River at

London Mills, 111.

Cedar Creek Trib at

St

. Augustine, 111.

Spoon River at

Se

vill

e, 111.

Big Creek near Bryant, 111.

Sangamon River at Mahomet, 11

1.Sangamon River at Monticello, 111.

Wildcat Creek Trib near Monticello, 111.

Friends Creek at Argenta, 11

1.Sangamon River near Oakley, 111.

South Fork Sangamon River near Nokomis, 111.

Flat Branch ne

ar Taylorville, 111.

South Fork Sangamon River at Kincaid, 111.

Horse Creek at Pawnee, 111.

Sangamon River at

River ton

, 111.

Spring Creek at Springfield, 111.

Sangamon River Trib at

Andrew, 111.

Salt Creek ne

ar Rowell, 111.

Lake Fo

rk near Cornland, 111.

Kickapoo Creek Trib at Hey worth, ill.

Mean

3.333

2.797

3.859

1.42

83.902

2.940

2.954

2.656

2.196

2.775

3.340

3.939

2.227

3.925

3.185

1.966

4.007

2.576

4.093

2.901

3.607

3.715

1.45

93.217

3.755

3.018

3.565

3.640

3.259

4.157

3.238

2.318

3.566

3.291

2.616

Standard

deviation

0.227

0.405

0.329

0.447

0.260

0.237

0.307

0.418

0.312

0.324

0.320

0.280

0.371

0.303

0.238

0.402

0.220

0.272

0.226

0.147

0.285

0.285

0.247

0.269

0.250

0.343

0.314

0.299

0.251

0.308

0.386

0.318

0.357

0.338

0.306

Skew

-0.076

-0.222

-0.056

0.106

0.885

-0.030

-0.952

-0.989

1.321

0.989

-0.004

0.531

-0.918

0.686

0.587

-0.693

0.649

-0.191

-0.126

-0.662

-0.073

-0.472

-0.519

0.678

0.398

0.874

-0.874

-0.019

-0.823

-1.252

-0.273

-0.333

0.148

-0.669

0.609

WRC estimated

Mean

3.33

32.797

3.859

1.42

83.902

2.940

2.980

2.68

12.196

2.775

3.340

3.939

2.265

3.925

3.185

2.004

4.007

2.59

34.093

2.90

1

3.607

3.722

1.459

3.217

3.755

3.018

3.580

3.646

3.259

4.175

3.238

2.318

3.566

3.338

2.616

Standard

deviation

0.227

0.405

0.329

0.447

0.260

0.237

0.243

0.373

0.312

0.324

0.320

0.280

0.299

0.303

0.238

0.337

0.220

0.237

0.226

0.147

0.285

0.270

0.247

0.269

0.250

0.343

0.281

0.302

0.25

10.265

0.386

0.318

0.357

0.342

0.306

Skew

-0.180

-0.293

-0.160

-0.125

0.380

-0.177

0.089

-0.593

0.285

0.341

-0.130

0.20

1-0.358

0.358

0.145

-0.258

0.270

0.169

-0.185

-0.512

-0.189

-0.278

-0.462

0.085

0.063

0.310

-0.451

-0.107

-0.594

-0.585

-0.316

-0.363

-0.026

0.374

0.082