PRELIMINARY CULVERT ANALYSIS REPORT FOR

CULVERT NO. 008-C

OREGON AVENUE OVER PINEHURST CREEK   

 

  

 

 

Prepared for 

The District of Columbia Department of Transportation Washington, D.C.

       

Prepared by  

Parsons Transportation Group 100 M Street, SE Washington, DC 

         

SEPTEMBER 2010 

  2 

TABLE OF CONTENTS 

1.0  LOCATION MAP ............................................................................................................ 3 2.0  DESCRIPTION ............................................................................................................... 4 3.0  DESIGN STANDARDS AND CRITERIA ............................................................................. 4 4.0  EXISTING CONDITONS .................................................................................................. 5 5.0  PROPOSED CONDITIONS .............................................................................................. 5 6.0  HY‐8 CULVERT ANALYSIS REPORT ................................................................................. 6 7.0  PHOTOS ..................................................................................................................... 44 

  

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1.0      LOCATION MAP 

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2.0      DESCRIPTION The existing Oregon Avenue Project is bounded by Military Road on the South and Western Avenue on the North. The existing culvert consists of singular rectangular concrete barrel of varying in size over Pinehurst Creek with two lanes of traffic. This structure is nearly 34’ long and 14’‐6” x 4’‐6” at inlet and 14’‐10” x 5’‐7” at outlet as per  inspection  report prepared by Wilbur Smith Associates, Falls Church, VA dated 07/18/03. The purpose of this report is to analyze the existing conditions of the culvert and check the adequacy. This report will identify the existing culvert issues and provide a basis for future improvement.  

3.0     DESIGN STANDARDS AND CRITERIA The existing culvert  is analyzed  in accordance with Chapter 23 and 33 of the District of Columbia Department of Transportation (DDOT) Design and Engineering Manual and the Federal Emergency Management Agency (FEMA), District of Columbia Washington DC. The culvert is in floodplain and analyzed using 50‐year storm draining to  low point  in sag.  In compliance with the National Flood Insurance Program (NFIP) it is necessary to consider 100‐year frequency flood at all locations where construction will encroach on a floodplain. The NFIP prohibits any construction in floodplains, when combined with  all  other  existing  and  anticipated  uses, which would  increase  the water  surface elevation of 100‐year flood more than one foot at any given point. This does not necessarily require that the culvert be sized to pass the 100‐year flood, provided the capacity of the culvert plus flow bypassing  the  culvert  is  sufficient  to accommodate  the 100‐year  flood without  raising  the water surface elevation excessively.  

Following  are  the  summary  of  data  for  Pinehurst  Run  upstream  of Oregon  Avenue  from  Flood Insurance  Study,  Federal  Emergency Management  Agency,  District  of  Columbia Washington  DC dated August 16, 2007. 

 

Drainage Area (sqmi)    0.75 

10‐year flood (cfs)    1120 

50‐year flood (cfs)    1580 

100-year flood (cfs) 1805 500‐year flood (cfs)    2425 

50‐year elevation (ft)    210.50 (From Flood Profile) 

100‐year elevation (ft)  210.60 (From Flood Profile) 

 

 

 

 

 

 

5  

 

 

 

4.0       EXISTING CONDITONS  Existing  culvert  (size  14’‐6”  X  4’‐6”)  is  analyzed,  considering  3.5’  height  parapet wall  above  the culvert, by using HY‐8 and results are provided in end of this this report. From table 1, headwater elevation  for design discharge  (1580 cfs)  is 209.71  ft, discharge  through culvert  is 777.46 cfs and roadway  discharge  is  801.96  cfs. Headwater  elevation  for  100‐year  flood  (1805  cfs)  is  209.93  ft which  is  less than 210.60 ft. It  is observed that there  is significant scouring on downstream of the culvert  and  outlet  velocity  is  15.76  ft/s  for  design  discharge  from  table  2.  Existing  culvert  has supercritical flow and function under inlet control.    

5.0       PROPOSED CONDITIONS  A  triple barrel box  culvert  in different  conditions  and  size with  same  length  and parapet wall  is recommended  and analyses are provided on  this  report.  It  is  assumed  that  road  surface will be raised by 1.5’  in proposed condition. From  table 4,  the headwater elevation  for design discharge (1580 cfs) is 208.38 ft, discharge through culvert is 1580.00 cfs and roadway discharge is 0.00 cfs. It shows  that 50‐year  flood passes  through culvert without overtopping  road. Headwater elevation for 100‐year  flood  (1805  cfs)  is 209.35  ft which  is  less  than  210.60  ft. A  class  II  dry Riprap mat (L=30’, W=60’ & T=36”)  is recommended for downstream protection of the culvert because outlet velocity is 16.96 ft/s for design discharge from table 5. Proposed culvert will have supercritical flow and will be functioning under inlet control.   

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6.0     HY‐8 CULVERT ANALYSIS REPORT 

7  

Table 1 - Summary of Culvert Flows at Crossing: Exist Culvert

Headwater Elevation (ft) Total Discharge (cfs)

Exist-1 Discharge (cfs)

Roadway Discharge (cfs) Iterations

200.70 0.00 0.00 0.00 1 203.53 180.50 180.50 0.00 1 205.20 361.00 361.00 0.00 1 206.88 541.50 541.50 0.00 1 208.24 722.00 665.05 56.62 7 208.74 902.50 705.15 197.22 6 209.07 1083.00 730.34 352.34 5 209.33 1263.50 750.02 513.13 5 209.56 1444.00 766.56 677.06 5 209.71 1580.00 777.56 802.10 5 209.94 1805.00 793.58 1010.60 4 207.64 613.17 613.17 0.00 Overtopping

8  

Rating Curve Plot for Crossing: Exist Culvert

9  

Table 2 - Culvert Summary Table: Exist-1

Total Discharge

(cfs) Culvert

Discharge (cfs)

Headwater Elevation

(ft) Inlet Control

Depth (ft) Outlet Control

Depth (ft) Flow Type

Normal Depth (ft)

Critical Depth (ft)

Outlet Depth (ft)

Tailwater Depth (ft)

Outlet Velocity

(ft/s) Tailwater Velocity

(ft/s)

0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000

180.50 180.50 203.53 2.830 0.0* 1-S2n 0.831 1.692 1.123 0.868 11.085 3.989 361.00 361.00 205.20 4.499 0.0* 1-S2n 1.300 2.686 1.906 1.267 13.064 5.130 541.50 541.50 206.88 6.177 0.0* 5-S2n 1.690 3.519 2.592 1.580 14.406 5.918 722.00 665.05 208.24 7.542 0.0* 5-S2n 1.936 4.036 3.026 1.847 15.156 6.536 902.50 705.15 208.74 8.039 0.0* 5-S2n 2.010 4.197 3.163 2.083 15.376 7.050 1083.00 730.34 209.07 8.366 0.0* 5-S2n 2.057 4.296 3.246 2.297 15.516 7.493 1263.50 750.02 209.33 8.630 0.0* 5-S2n 2.094 4.373 3.313 2.494 15.613 7.884 1444.00 766.56 209.56 8.858 0.0* 5-S2n 2.125 4.437 3.367 2.678 15.701 8.236 1580.00 777.56 209.71 9.012 0.109 5-S2n 2.145 4.479 3.403 2.809 15.756 8.479 1805.00 793.58 209.94 9.241 0.313 5-S2n 2.175 4.541 3.456 3.013 15.837 8.849

10  

* theoretical depth is impractical. Depth reported is corrected.

********************************************************************************

Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 200.00 ft

Culvert Length: 34.01 ft, Culvert Slope: 0.0206

********************************************************************************

11  

Culvert Performance Curve Plot: Exist-1

12  

Water Surface Profile Plot for Culvert: Exist-1

Site Data - Exist-1

Site Data Option: Culvert Invert Data

Inlet Station: 10.00 ft

Inlet Elevation: 200.70 ft

Outlet Station: 44.00 ft

Outlet Elevation: 200.00 ft

Number of Barrels: 1

Culvert Data Summary - Exist-1

Barrel Shape: Concrete Box

Barrel Span: 14.50 ft

Barrel Rise: 4.60 ft

Barrel Material: Concrete

Embedment: 0.00 in

Barrel Manning's n: 0.0120

Inlet Type: Conventional

Inlet Edge Condition: Square Edge (90º) Headwall

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Inlet Depression: None

14  

Table 3 - Downstream Channel Rating Curve (Crossing: Exist Culvert)

Tailwater Channel Data - Exist Culvert

Tailwater Channel Option: Irregular Channel

Channel Slope: 0.0160

User Defined Channel Cross-Section:

Coord No. Station (ft) Elevation (ft) Manning's n

1 0.00 210.00 0.0350

2 100.00 206.00 0.0350

3 160.00 198.00 0.0400

4 210.00 198.10 0.0400

5 230.00 202.00 0.0350

6 340.00 211.50 0.0350

7 360.00 212.00 0.0000

Roadway Data for Crossing: Exist Culvert

Roadway Profile Shape: Irregular Roadway Shape (coordinates)

Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number

0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02

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Irregular Roadway Cross-Section:

Coord No. Station (ft) Elevation (ft)

1 0.00 213.37

2 100.00 208.81

3 150.00 207.64

4 162.00 207.64

5 162.00 211.14

6 188.00 211.18

7 188.00 207.68

8 200.00 207.68

9 300.00 209.92

10 400.00 214.56

Roadway Surface: Paved

Roadway Top Width: 32.00 ft

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Crossing Front View (Roadway Profile): Exist Culvert

50 Yr HW Parapet wall

Road Profile Exist Culvert

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Table 4 - Flows at Crossing: Prop Culvert-1

Headwater Elevation (ft) Total Discharge (cfs)

Prop- No Overtopping Discharge (cfs)

Roadway Discharge (cfs) Iterations

200.70 0.00 0.00 0.00 1 202.46 180.50 180.50 0.00 1 203.48 361.00 361.00 0.00 1 204.33 541.50 541.50 0.00 1 205.08 722.00 722.00 0.00 1 205.78 902.50 902.50 0.00 1 206.46 1083.00 1083.00 0.00 1 207.14 1263.50 1263.50 0.00 1 207.83 1444.00 1444.00 0.00 1 208.38 1580.00 1580.00 0.00 1 209.35 1805.00 1803.80 1.21 3 209.20 1769.65 1769.65 0.00 Overtopping

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Rating Curve Plot for Crossing: Prop Culvert-1

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Table 5 - Culvert Summary Table: Prop- No Overtopping

Total Discharge

(cfs) Culvert

Discharge (cfs)

Headwater Elevation

(ft) Inlet Control

Depth (ft) Outlet Control

Depth (ft) Flow Type

Normal Depth (ft)

Critical Depth (ft)

Outlet Depth (ft)

Tailwater Depth (ft)

Outlet Velocity

(ft/s) Tailwater Velocity

(ft/s)

0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000

180.50 180.50 202.46 1.758 0.0* 1-S2n 0.520 1.042 0.635 0.868 9.475 3.989 361.00 361.00 203.48 2.783 0.0* 1-S2n 0.824 1.654 1.081 1.267 11.130 5.130 541.50 541.50 204.33 3.628 0.0* 1-S2n 1.088 2.168 1.475 1.580 12.241 5.918 722.00 722.00 205.08 4.383 0.0* 1-S2n 1.319 2.626 1.836 1.847 13.110 6.536 902.50 902.50 205.78 5.084 0.0* 1-S2n 1.526 3.047 2.177 2.083 13.819 7.050 1083.00 1083.00 206.46 5.759 0.0* 1-S2n 1.732 3.441 2.501 2.297 14.436 7.493 1263.50 1263.50 207.14 6.435 0.0* 5-S2n 1.921 3.813 2.813 2.494 14.972 7.884 1444.00 1444.00 207.83 7.132 0.0* 5-S2n 2.101 4.168 3.111 2.678 15.471 8.236 1580.00 1580.00 208.38 7.683 0.109 5-S2n 2.237 4.426 3.330 2.809 15.816 8.479 1805.00 1803.80 209.35 8.654 0.313 5-S2n 2.455 4.835 3.680 3.013 16.341 8.849

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* theoretical depth is impractical. Depth reported is corrected.

********************************************************************************

Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 199.90 ft

Culvert Length: 40.01 ft, Culvert Slope: 0.0200

********************************************************************************

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Culvert Performance Curve Plot: Prop- No Overtopping

22  

Water Surface Profile Plot for Culvert: Prop- No Overtopping

Site Data - Prop- No Overtopping

Site Data Option: Culvert Invert Data

Inlet Station: 10.00 ft

Inlet Elevation: 200.70 ft

Outlet Station: 50.00 ft

Outlet Elevation: 199.90 ft

Number of Barrels: 3

Culvert Data Summary - Prop- No Overtopping

Barrel Shape: Concrete Box

Barrel Span: 10.00 ft

Barrel Rise: 6.00 ft

Barrel Material: Concrete

Embedment: 0.00 in

Barrel Manning's n: 0.0120

Inlet Type: Conventional

Inlet Edge Condition: Square Edge (90º) Headwall

Inlet Depression: None

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Table 6 - Downstream Channel Rating Curve (Crossing: Prop Culvert-1)

Tailwater Channel Data - Prop Culvert-1

Tailwater Channel Option: Irregular Channel

Channel Slope: 0.0160

User Defined Channel Cross-Section:

Coord No. Station (ft) Elevation (ft) Manning's n

1 0.00 210.00 0.0350

2 100.00 206.00 0.0350

3 160.00 198.00 0.0400

4 210.00 198.10 0.0400

5 230.00 202.00 0.0350

6 340.00 211.50 0.0350

7 360.00 212.00 0.0000

Roadway Data for Crossing: Prop Culvert-1

Roadway Profile Shape: Irregular Roadway Shape (coordinates)

Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number

0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02

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Irregular Roadway Cross-Section:

Coord No. Station (ft) Elevation (ft)

1 0.00 213.37

2 100.00 209.70

3 150.00 209.30

4 159.00 209.20

5 159.00 211.20

6 191.00 211.20

7 191.00 209.25

8 200.00 209.40

9 300.00 210.50

10 400.00 214.56

Roadway Surface: Paved

Roadway Top Width: 36.00 ft

25  

Crossing Front View (Roadway Profile): Prop Culvert-1

26  

Table 7 - Summary of Culvert Flows at Crossing: Prop Culvert-2

Headwater Elevation (ft) Total Discharge (cfs)

Prop-No increse in HW Elev Discharge

(cfs) Roadway Discharge

(cfs) Iterations

200.70 0.00 0.00 0.00 1 202.58 180.50 180.50 0.00 1 203.68 361.00 361.00 0.00 1 204.59 541.50 541.50 0.00 1 205.40 722.00 722.00 0.00 1 206.16 902.50 902.50 0.00 1 206.91 1083.00 1083.00 0.00 1 207.67 1263.50 1263.50 0.00 1 208.48 1444.00 1444.00 0.00 1 209.14 1580.00 1580.00 0.00 1 209.89 1805.00 1726.15 78.73 5 209.20 1592.66 1592.66 0.00 Overtopping

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Rating Curve Plot for Crossing: Prop Culvert-2

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Table 8 - Culvert Summary Table: Prop-No increse in HW Elev

Total Discharge

(cfs) Culvert

Discharge (cfs)

Headwater Elevation

(ft) Inlet Control

Depth (ft) Outlet Control

Depth (ft) Flow Type

Normal Depth (ft)

Critical Depth (ft)

Outlet Depth (ft)

Tailwater Depth (ft)

Outlet Velocity

(ft/s) Tailwater Velocity

(ft/s)

0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000

180.50 180.50 202.58 1.882 0.0* 1-S2n 0.582 1.118 0.691 0.868 9.677 3.989 361.00 361.00 203.68 2.982 0.0* 1-S2n 0.890 1.774 1.173 1.267 11.394 5.130 541.50 541.50 204.59 3.887 0.0* 1-S2n 1.189 2.325 1.602 1.580 12.517 5.918 722.00 722.00 205.40 4.699 0.0* 1-S2n 1.426 2.817 1.996 1.847 13.398 6.536 902.50 902.50 206.16 5.461 0.0* 1-S2n 1.662 3.269 2.367 2.083 14.124 7.050 1083.00 1083.00 206.91 6.208 0.0* 5-S2n 1.885 3.691 2.718 2.297 14.757 7.493 1263.50 1263.50 207.67 6.975 0.0* 5-S2n 2.092 4.091 3.054 2.494 15.325 7.884 1444.00 1444.00 208.48 7.785 0.0* 5-S2n 2.298 4.471 3.378 2.678 15.830 8.236 1580.00 1580.00 209.14 8.437 0.109 5-S2n 2.450 4.748 3.615 2.809 16.188 8.479 1805.00 1726.15 209.89 9.187 0.313 5-S2n 2.603 5.036 3.863 3.013 16.548 8.849

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* theoretical depth is impractical. Depth reported is corrected.

********************************************************************************

Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 199.90 ft

Culvert Length: 40.01 ft, Culvert Slope: 0.0200

********************************************************************************

30  

Culvert Performance Curve Plot: Prop-No increse in HW Elev

31  

Water Surface Profile Plot for Culvert: Prop-No increse in HW Elev

Site Data - Prop-No increse in HW Elev

Site Data Option: Culvert Invert Data

Inlet Station: 10.00 ft

Inlet Elevation: 200.70 ft

Outlet Station: 50.00 ft

Outlet Elevation: 199.90 ft

Number of Barrels: 3

Culvert Data Summary - Prop-No increse in HW Elev

Barrel Shape: Concrete Box

Barrel Span: 9.00 ft

Barrel Rise: 6.00 ft

Barrel Material: Concrete

Embedment: 0.00 in

Barrel Manning's n: 0.0120

Inlet Type: Conventional

Inlet Edge Condition: Square Edge (90º) Headwall

Inlet Depression: None

32  

Table 9 - Downstream Channel Rating Curve (Crossing: Prop Culvert-2)

Tailwater Channel Data - Prop Culvert-2

Tailwater Channel Option: Irregular Channel

Channel Slope: 0.0160

User Defined Channel Cross-Section:

Coord No. Station (ft) Elevation (ft) Manning's n

1 0.00 210.00 0.0350

2 100.00 206.00 0.0350

3 160.00 198.00 0.0400

4 210.00 198.10 0.0400

5 230.00 202.00 0.0350

6 340.00 211.50 0.0350

7 360.00 212.00 0.0000

Roadway Data for Crossing: Prop Culvert-2

Roadway Profile Shape: Irregular Roadway Shape (coordinates)

Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number

0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02

33  

Irregular Roadway Cross-Section:

Coord No. Station (ft) Elevation (ft)

1 0.00 213.37

2 100.00 209.70

3 150.00 209.30

4 159.00 209.20

5 159.00 211.20

6 191.00 211.20

7 191.00 209.25

8 200.00 209.40

9 300.00 210.50

10 400.00 214.56

Roadway Surface: Paved

Roadway Top Width: 36.00 ft

34  

Crossing Front View (Roadway Profile): Prop Culvert-2

35  

Table 10 - Summary of Culvert Flows at Crossing: Prop Culvert-3

Headwater Elevation (ft) Total Discharge (cfs)

Prop- HW Elev 1.5' Below Shoulder Discharge (cfs)

Roadway Discharge (cfs) Iterations

200.70 0.00 0.00 0.00 1 202.26 180.50 180.50 0.00 1 203.17 361.00 361.00 0.00 1 203.92 541.50 541.50 0.00 1 204.59 722.00 722.00 0.00 1 205.20 902.50 902.50 0.00 1 205.78 1083.00 1083.00 0.00 1 206.35 1263.50 1263.50 0.00 1 206.91 1444.00 1444.00 0.00 1 207.34 1580.00 1580.00 0.00 1 208.07 1805.00 1805.00 0.00 1 209.20 2123.48 2123.48 0.00 Overtopping

36  

Rating Curve Plot for Crossing: Prop Culvert-3

37  

Table 11 - Culvert Summary Table: Prop- HW Elev 1.5' Below Shoulder

Total Discharge

(cfs) Culvert

Discharge (cfs)

Headwater Elevation

(ft) Inlet Control

Depth (ft) Outlet Control

Depth (ft) Flow Type

Normal Depth (ft)

Critical Depth (ft)

Outlet Depth (ft)

Tailwater Depth (ft)

Outlet Velocity

(ft/s) Tailwater Velocity

(ft/s)

0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000

180.50 180.50 202.26 1.561 0.0* 1-S2n 0.428 0.923 0.555 0.868 9.038 3.989 361.00 361.00 203.17 2.466 0.0* 1-S2n 0.728 1.465 0.937 1.267 10.704 5.130 541.50 541.50 203.92 3.219 0.0* 1-S2n 0.943 1.919 1.277 1.580 11.775 5.918 722.00 722.00 204.59 3.887 0.0* 1-S2n 1.157 2.325 1.593 1.847 12.588 6.536 902.50 902.50 205.20 4.503 0.0* 1-S2n 1.332 2.698 1.888 2.083 13.277 7.050 1083.00 1083.00 205.78 5.084 0.0* 1-S2n 1.498 3.047 2.171 2.297 13.857 7.493 1263.50 1263.50 206.35 5.647 0.0* 1-S2n 1.663 3.377 2.441 2.494 14.380 7.884 1444.00 1444.00 206.91 6.208 0.0* 5-S2n 1.825 3.691 2.700 2.678 14.856 8.236 1580.00 1580.00 207.34 6.637 0.109 5-S2n 1.932 3.919 2.889 2.809 15.190 8.479 1805.00 1805.00 208.07 7.373 0.313 5-S2n 2.110 4.283 3.193 3.013 15.702 8.849

38  

* theoretical depth is impractical. Depth reported is corrected.

********************************************************************************

Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 199.90 ft

Culvert Length: 40.01 ft, Culvert Slope: 0.0200

********************************************************************************

39  

Culvert Performance Curve Plot: Prop- HW Elev 1.5' Below Shoulder

40  

Water Surface Profile Plot for Culvert: Prop- HW Elev 1.5' Below Shoulder

Site Data - Prop- HW Elev 1.5' Below Shoulder

Site Data Option: Culvert Invert Data

Inlet Station: 10.00 ft

Inlet Elevation: 200.70 ft

Outlet Station: 50.00 ft

Outlet Elevation: 199.90 ft

Number of Barrels: 3

Culvert Data Summary - Prop- HW Elev 1.5' Below Shoulder

Barrel Shape: Concrete Box

Barrel Span: 12.00 ft

Barrel Rise: 6.00 ft

Barrel Material: Concrete

Embedment: 0.00 in

Barrel Manning's n: 0.0120

Inlet Type: Conventional

Inlet Edge Condition: Square Edge (90º) Headwall

Inlet Depression: None

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Table 12 - Downstream Channel Rating Curve (Crossing: Prop Culvert-3)

Tailwater Channel Data - Prop Culvert-3

Tailwater Channel Option: Irregular Channel

Channel Slope: 0.0160

User Defined Channel Cross-Section:

Coord No. Station (ft) Elevation (ft) Manning's n

1 0.00 210.00 0.0350

2 100.00 206.00 0.0350

3 160.00 198.00 0.0400

4 210.00 198.10 0.0400

5 230.00 202.00 0.0350

6 340.00 211.50 0.0350

7 360.00 212.00 0.0000

Roadway Data for Crossing: Prop Culvert-3

Roadway Profile Shape: Irregular Roadway Shape (coordinates)

Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number

0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02

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Irregular Roadway Cross-Section:

Coord No. Station (ft) Elevation (ft)

1 0.00 213.37

2 100.00 209.70

3 150.00 209.30

4 159.00 209.20

5 159.00 211.20

6 191.00 211.20

7 191.00 209.25

8 200.00 209.40

9 300.00 210.50

10 400.00 214.56

Roadway Surface: Paved

Roadway Top Width: 36.00 ft

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Crossing Front View (Roadway Profile): Prop Culvert-3

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7.0       PHOTOS 

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Upstream of Culvert

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Upstream of Culvert

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Downstream of Culvert

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Downstream of Culvert

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Downstream of Culvert

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Parapet Wall

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Parapet Wall

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