C-631-~. ..

KNOX, RlCKSEN, SNOOK, ANTHONY & ROBBINS

w_ SAYER SNOOK, JR .

.JOHN C. RICKSE:N RUPERT H. RtCKSEN STEVEN R. ANTHONY

WILLIAM C. ROBBINS m STE PH EN S. HARPER ROBERT G. ALLEN THOMAS A. PALMER RICH .... RO G. LOGAN, .JR.

JEFFREY A. HARPER

THOMAS £. F"RAYSSE: ~NNE M. PAYNE

Mrs. Deborah Herrmann

ATTORNEYS AT LAW

ORDWAY BUILOING-KA1SER CENTER

ONE KAISER PLAZA, SUITE 850

OAKLAND, CALIFORNIA 94612-3699

{415) 893-tOOO

February 26, 1986

The Resources Agency of California Department of Conservation State Mining and Geology Board 1416 9th Street, Room 1326-2 Sacramento, CA 95814

RE: Syar Industries, Inc. Lake Herman Quarry

WALLACE W KNOX (1905·1982)

SOLANO COUNTY OFFICE 1530 WEBSTE:R STRE:ET, SUITE 0

FAIRF'IELO, CALIFORNIA 94'533 (707) 422·2:730

PLEASE DIRECT REPLY TO:

Received by Deportment of Cgn~.ervafion \_ .'·

FEB 2 7 1986

North San Francisco Bay Production-Consumption Region Sector G

Dear Deborah:

As we discussed on the telephone and as requested by the Board at its hearing on January 31, we are enclosing two reports done by Harding Lawson Associates entitled "Geochemical Evaluation, Old Mercury Mine Tailings Planned, Sky Valley Country Club, Benicia, Califor~ia" and "Report Geotechnical Investigation, Sky Valley Country Club Proposed Development, Benicia, California.

As indicated in the introduction of the latter study at page 1, the object of the work was "to evaluate the geology and the geologic hazards and to provide Harding Lawson's opinions on the feasibility of the residential project and the measures to mitigate the geologic hazards". The study was not done with the objective of locating aggregate deposits.

As stated in the report (pages 7 through 9) and on Plate 1, the deposits of basalt are located throughout the western portion of the property. These deposits are part of those which are being quarried by Syar on its adjacent property.

The findings of the Harding Lawson report are further substantiated by the State's Special Report 146 (at pages 6, 33-36) and by Bulletin 149 by C. E. Weaver.

Again, we request that the State Geologist classify (solely on the basis of geologic factors) the entire Sector G as containing significant mineral deposits and that it be designated by the Board as having regional significance.

_., .o:ttNOX, RICR..SEN, SNOOK, ANTHONY & ROBBINS ,

• February 26, 1986 Deborah Herrmann Page 2

As I mentioned to you on the phone, Jim Syar would like to conduct a field trip or tour of the Quarry and Sector G deposit for your staff, the State Geologist, and any members of the Board. Please contact Jim Syar directly at 707-643-2781 to arrange the tour if desired.

WCR:kas Enclosures cc: Jim Syar

Sincerely,

KNOX, RICKSEN, SNOOK, ANTHONY & ROBBINS

WILLIAM C. ROBBINS III

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8 copies:

4 copies:

l copy: l copy: l copy:

MSM/ECW/jd

DISTRIBUTION

REPORT GEOTECHNICAL INVESTIGATION

SKY VALLEY COUNTRY Clt13 PROPOSED DEVELOPMENT BENICIA, CALIFORNIA

April 11, 1985

COPY NO. 1_

Schwafel Engineers/Bissell & Karn 2206 Springs Road P.O. Box 5058

· Vallejo, California 94591

Attention: Mr. Edgar Nishizawa

Mr. Dan Daniel Daniel Properties 402A Military East P.O. Box 283 Benicia, california 94510

Job File QC/Bound Report File Concord Office File

QUALITY CONTROL REVIEWER

(;!~ e. YGU/J-~1 Frank C. Kresse, Engineering Geologist - 406

H•rdlng Lawson Assocl•t••

Copy No.

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9-12

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A Report Prepared for

Mr. Dan Daniel c/o Schwafel Engineers/Bissell & Karn 2206 Springs Road P.O. Box 5058 Vallejo, California 94591

REAJRT GEOTED-lNICAL INVESTIGATION SKY VALLEY COUNTRY CLL.8 PROAJSED DEVELOPMENT BENICIA, CALIFORNIA

HLA Job 1'b. 17, 450, 001. 01

by

~/--//. ,AytA-4_ '1'11Chael S. Malone,

Project Geologist

E. C. W1nterhalder, Engineering Geologist - 272

Harding Lawson Associates 2430 Stanwell Drive, Suite 110 Concord, California 94520 415/687-9660

April 11, 1985

Harding Lawson Associ•t•S

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TABLE OF CONTENTS

LIST OF ILLUSTRATIONS

I INTRODUCTION

II SCOPE OF WORK

III REGIONAL SETTING

A. Geomorphic Setting B. Regional Geology

IV SEISMICITY . . . . • •

v

VI

VII

VIII

A. Tectonics . . • . • B. Earthquake History

PROJECT AREA COf\DITIONS

A. Topography . B. Geology •· • • • • •

1. Bedrock • • . . 2. Structure • • • 3. Surficial Deposits 4. Landslides

c. Ground Water

CONCLUSIONS

REFERENCES

ILLUSTRATIONS

DISTRIBUTION

ii

Harding Lawson Ass.ociates

iii

1

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3

3 3

4

4 5

7

7 7 7 9 9

10 11

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Figure 1

Figure 2

Plate 1

Plate 2

Plate 3

Plate 4

Plate 5

Plate 6

Plate 7

Plate 8

Plate 9

Plate 10

Plate 11

Plate 12

Plate 13

LIST OF ILLUSTRATIONS

Project Location Map

Regional Fault and Epicenter Map for Earthquakes

Project Area Geology Map

Test Pits SV-1 and SV-2

Test Pits SV-3 and SV-4

Test Pits SV-5 and SV-6

Test Pits SV-7 and SV-8

Test Pits SV-9 and SV-10

Test Pits SV-11 and SV-12

Test Pits SV-13 and SV-14

Test Pits SV-15, 'SV-16, and SV-17

Test Pits SV-18 and SV-19

Test Pits SV-20 and SV-21

Soil Classification Chart

Physical Properties Criteria for Rock Descriptions

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I INTRODUCTION

This report presents the results of a reconnaissance geotechnical inves­

tigation of the proposed Sl<y Valley Country Club Development located north

of Benicia, California, as shown on Figure 1. Developnent plans include

single-family residences, largely in the higher areas of the site, and

multi-family residences and recreational facilities near Sulphur Springs

Creek in the areas of lower elevation.

The object of our work was to evaluate the geology ·and the geologic

hazards, and to provide our opinions on the project feasibility and measures

to mitigate the geologic hazards.

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JOB NUMBER

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Project Location Map

CONTRA COSTA

COUNTY

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SCALE

Sky Valley Country Club

Solano County, California

APPROVED DATE

JAS 17450,001 01 C<-W 4/85

PROJECT AREA

10 miles

FIGURE

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II SCOPE OF WORK

The geology of the area was determined through a review of the geologic

literature concerning previous work in the area and mapping of the site

using aerial photographs viewed stereoscopically. Because of extensive soil

cover over most of the site, outcrop exposures of the bedrock were supple­

mented by 21 backhoe pits in the range of 5 to 17 feet deep which usually

penetrated the soils to rock and also provided indications of soil types,

including landslide debris. The geologic reference material reviewed and

aerial photos used are listed at the rear of this report. The Geologic Map

prepared from this work is attached as Plate 1.

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III REGIONAL SETTING

A. Ge()'llorphic Setting

The Sky Valley area is located in the central Coast Range geomorphic

province. This region is characterized by northwest trending ridges and

valleys of the Coast Ranges with drainages generally parallel to this trend

and emptying into San Pablo and San Francisco Bays.

B. Regional Geology

The geology of the region is characterized by f.'esozoic age rocks of the

Great Valley Sequence faulted and folded over the underlying rocks of the

Franciscan Assemblage. Tertiary rocks occur northeast and stratigraphically

above the Great Valley Sequence. The geologic structure is dominated by a

80rthwest trend related to the active strike-slip San Andreas fault system.

Folding in the Tertiary and Great Valley rocks is approximately parallel to ·

this trend, including a broad northwest trending syncline in the project

area.

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IV SEISMICITY

A. Tectonics

The site lies within a seismically active region at the continental

margin represented by several major fault zones including the San Pndreas,

Hayward, and Green Valley-Concord fault systems which lie west and east of

the site, as indicated on the attached Regional Fault and Epicenter Map,

Figure 2. These faults have experienced repeated offsets during recent geo-

logic time and some have experienced one or more historical earthquakes of

significant magnitude. Geologic mapping in the vicinity of the site as a

part of a Bay Region study by the U.S. Geological Survey revealed no indica-

tions for an active fault within the site. However; recent findings as a j ~rl cl v1e - I .S,,.,

result of continuing study indicate that the West Napa fault zone lying t,.o c '~ ____,/ 5fe ,.vi b

northwest of the site is active (Herd and Helley, 1977). n.. t d" l p vur own s u ies bj

indicate that the Southampton fault lying southeast of the site may have

experienced surface displacement during relatively recent geologic time and

thereby might be classified as potentially active. As indicated by the

attached Fault Map, Figure 2, a prolongation to connect these two faults

along the dominant northwest strike of active faults in the region is

possible, but it has not been demonstrated and they may not connect.

OJr investigation of the site and.previous work (Sims, 1973) indicate a

fault contact between the rocks of the Franciscan Assemblage and those of

the Great Valley Sequence as indicated on the Project Area Geologic Map,

Plate 1. Several northeast trending tear faults are present in the folded

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INTEGER - MAXIMUM REPORTED INTENSITY (ONLY FOR EARTHQUAKES OF UNKNOWN MAGNITUDE)

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FA U LT SYMBOL

~ UNDIFFERENTIATED FAULT (Dotted where concealed, dashed where inferred~ solid where definitely located, barbs on the upper thrust bloc.kl --------- ACT IVE! FAULT (All dashed offshore faults are based on acoustic reflection profile records)

i 30 20 10 o I

30 20 10 0

' SCALE r 1:1,000,000

30 MILES

40 KILOMETERS

REFERENCES: 1. I Faults with Quaternary Displacement, Northeastern

2.

3.

San Francisco Bay Regio~. California, 1977, Helley and Herd, I S I J U.S. Geologica urvey Map MF-881

Preliminary Geologic Maplof Solano County and Parts of Napa, Contra Costa, Marin and Yolo Counties, Califo1·nia, 1973, Sims et al, Basic Data Contribution No. 54

I Earthquake Epicenter Mai? of California, 1978, Map Sheet 39, California Division of Mines and Geology

I

' 4. Fault Map of California,

0

1975, Map No. 1, California Geologic Data Map Series, California Division of Mines and Geology

Harding Lawson Aasoclates

Engineers. Geologists

Regi0~al Fault and Epicenter Map for Ealthquakes, 1900 to 1974

FIGURE

Sky ·J111cy Country Club 2 Sola1•J: County, Ca:, forn1<1

~o~,,-w~,~~~~~~~--;;,o~.~N~UV~B"'""~~~~~~--..~,""5:'°"=~doo:-~~~~~,OA~r~E~~~~~,,~V~'5~E00--~~-"~.~,.~~~~-1 7450,001 01 cc"<!( 4(85 JAS

& Geophys1c1sts

•

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Tertiary rocks northeast of the project area. None of these on-site faults

are known to have experienced geologically recent or historical seismic

activity, and there are no visible conditions on the site to indicate that

they are active. Based on the known tectonic history of the region, the

on-site fault was formed millions of years ago and, therefore, it is

inactive.

B. Earthquake History

The earthquake history includes nine major earthquakes that produced

significant ground motion in the Vallejo/Benicia area·with epicenters within

a 40-mile radius. These earthquakes extend from 1868 through 1915. Because

they largely precede the establishment of a seismograph network, both the

locations and magnitudes of the earlier events can only be established based

upon reported intensities. The largest event by far was that of April 18,

1906, with an estimated Richter magnitude of 8.3 caused by major displace­

ment on the San Andreas fault which lies about 25 miles west. Other major

events include the 1836 and 1868 earthquakes on the Hayward fault about 12

miles southwest and with magnitudes of about 7 on the Richter scale. On

March 31, 1898, a strong earthquake occurred near Mare Island which caused

significant damage to the Naval Base as well as damage in Benicia and

Vallejo. The source of this earthquake is unknown, although it might have

been due to.a northerly prolongation of the Hayward fault beneath San Pablo

Bay. t'b surface rupture is reported for this event. However, it might have

been due to a displacement on the Southampton fault in which the rupture did

~ not reach the surface. Some of the early investigators in the area includ­

ing Tolman (1931) believed the Southampton fault to be active. Although the

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conclusions reached by the earlier investigators must be regarded with

caution, Tolman states that "Prior to the San Francisco earthquake in 1906,

the Carquinez Straits and Suisun Bay area probably exhibited the highest

average seismic activity of any region in central California. This state-

ment is believed to be justified even in view of the incompleteness of the

older records and the fact that much of central California was partially

inhabited. Since that time, the activity has been very slight. The earth

stresses relieved along the Hayward fault south of Berkeley are expended c~tvL-;A_f

farther north along the Sunol-Southampton fault and possibly other faults to~ ,c,..,,£.f

the east." Other investigators beside Tolman have pointed out the obvious

northward bend of Carquinez Strait where it crosses the Southampton fault

near Port Costa. If it is a deflection of tectonic origin, it would be

consistent with the right lateral placement of an ·active fault in the San

Andreas system.

Other nearby active faults, including the Green Valley-Concord fault

system to the east, have experienced historical earthquakes ranging up to

about magnitude 6 based on instrt..rnental and intensity estimates for the

older events. The maximum magnitude capability of these faults is believed

to be in the range of 6 to 6.5.

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V PROJECT AREA CONDITIONS

A. Topography

The Sky Valley Country Club project occupies approximately 350 acres

located approximately 3 miles east of the City of Vallejo. See Project

Location Map, Figure 1. Sulphur Springs Creek drains the valley flowing

through the project area from north to south. The elevation of the valley

floor is about 150 feet above sea level.

Sulphur Springs Mountain forms a high ridge rising west of the valley to

an elevation of just over 900 feet. The flanks of this mountain are deeply

dissected by short drainages with slopes varying from very steep to approx-

imately 5:1. East of the valley, the terrain is somewhat less severe with

~rounded hills to approximately 500 feet elevation with slopes varying from

approximately 3:1 to 5:1 (horizontal to vertical).

B. Geology

1. Bedrock

The bedrock is Jurassic to Cretaceous in geologic age, and composed

of the Franciscan Assemblage or an Ulnamed Formation of the Great Valley

Sequence (Sims et al., 1973). The Franciscan Assemblage is a tectonically

formed mixture of a variety of rock types commonly exhibiting peryasive

shearing and localized metamorphism. The Franciscan rocks in the project

area consist irainly of greenstone (metamorphosed basaltic volcanic rock -

map symbol KJfg), altered rocks (KJfa), and minor diabase (KJfd). The

Ulnamed Formation has two distinct rock units in the project area. First,

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the lllJdstone unit (KJgvm) containing minor limestone and sandstone, and the

sandstone unit (Kgvs) containing limestone and lllJdstone. The._~Q£k classi--------.

fications and physical properties were based on field examination only; no

laboratory tests were performed.

Where exposed at the surface or in test pits, the greenstone is

red-brown to black, intensely fractured, moderately hard, moderately strong,

and moderately to deeply weathered. As indicated on the Geologic Map,

Plate 1, this rock occurs at the middle to higher elevations of Sulphur

Springs Mountain. The irregular occurrence of this rock and its close

association with the diabase and altered rocks indicates a complex mixing of

these rock types.

The altered rocks appear to have been produced by the hydrothermal

alteration of greenstone along· shear and fracture zones. These rocks are

commonly altered to clay, silica, and iron oxides. Typically, they are

mottled brown and white, closely fractured, moderately hard to hard, moder­

ately strong, and moderately weathered. Like the greenstone, these rocks

occur throughout the middle and higher elevations of Sulphur Springs

Mountain in close association with the greenstone.

The diabase is an ultrabasic rock intrusive into the greenstone. It

was observed at the highest ridge elevations on Sulphur Springs Mountain and

in a few small outcrops just downslope from the ridge. The diabase is

generally gray, moderately fractured, hard, strong, with little to moderate

weathering.

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The mudstones are brown to gray, thin bedded, closely fractured,

moderately hard, moderately strong, and deeply to moderately weathered.

Thin beds of sandstone and limestone occur within these rocks. The mud­

stones were not observed in outcrop, but were encountered in test pits in

the middle to lower elevations of Sulphur Springs Mountain, the lower eleva­

tions east of Sky Valley, and in the easternmost portions of the project

area.

The sandstone crops· out locally on the top and west slopes of the

ridge immediately east of Sky Valley. In outcrop, these rocks appear light

brown, blocky, moderately fractured, moderately hard and strong with deep to

moderate weathering.

2. Structure

Based on Sims' 1973 map, the rocks of Ll'Ylamed Formation dip eastward

formi~g the west lirrtJ of an asymmetric northwest trending syncline, whose

axis is located northeast of the project site.

On the west side of the project area, the lllJdstones are faulted

against the Franciscan rocks. Several northeast trending Tertiary faults

are located northeast of the project area and these may extend into the rrud­

stones and sandstones of the Sky Valley area. Local folding within the

rocks of the Unnamed Formation may exist throughout the. project area.

3. Surficial Deposits

Much of the project site is blanketed by colluvial and residual

soils. These soils are generally clayey and/or silty with variable amounts

of sand and gravel. As with the bedrock types, soil classification and

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physical properties are based only on field examination. t-0 laboratory

tests were performed.

The deepest soils are those developed on greenstone and altered

rock. These soils reach a thickness of 17 feet or more near the base of

some slopes. I-ear hilltops the soils thin to several feet.

Test pits were not excavated in alluvial soils. These soils occur

in the streambed along Sulphur Springs Creek and probably on the adjacent

stream terraces.

4. Landslides

~merous debris and mudflow type landslides (Qls) were observed

typically within the ravines and small tributary drainages to Sulphur

Springs Creek. This type of landslide is shallow involving only the soil

zone and occurs in seasonally saturated ground conditions on the steeper

slopes. Slide movement is relatively rapid. l'ost of these landslides

contain surface indications of recent activity.

Soil creep probably occurs in much of the colluvial and residual

soils on steep slopes. This type of soil movement is typically a slow down-

slope movement of surficial soils.

The presence of older landslides (Qols) was indicated by test pits

and by topographic irregularities characteristic of landslides. Test Pits

18 through 21 indicate_ the presence of an old landslide in mudstone east of

Sulphur Springs Creek (see Plate 1). This slide was probably active at the

time of stream terrace development and is now dormant. In the western

project area, the uppermost slopes of Sulphur Springs l'ountain may contain

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an old deep-seated landslide in the approximate area indicated on P.late 1.

The general configuration of the terrain and steep slopes are suggestive of

a large landslide extending into bedrock, although the topography could

result from differential erosion of hard and soft bedrock without landslide

movement.

C. Ground Water

t-.\.Jmerous springs and seeps occur in the project area. The more signif­

icant and probably perennial are those located below.the old mine workings.

1-'eavy flows are reported to have been encountered in mine workings and the

flows influenced the flow in springs at Blue Rock Springs resort located

approximately a mile to the northwest (Gomez, personal communication, 1985).

Water seepage was observed in Test Pit SV-12 where relatively pervious top-

soil was underlain by impervious clay.

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VI CONCLUSIONS

Large areas of the site are underlain by bedrock at relatively shallow

depth. These areas are suitable for construction of rnJltiple and single­

family residences, access roadways, utilities, etc. as is generally

prooosed. 1-'owever, the conditions at the site vary appreciably, both

topographically and geologically. These conditions, which represent geo­

logic hazards, include steep slopes in weak soils and bedrock, active

landslides, old landslides, old mine workings, and areas of persistent

springs and ground-water seepage.

The occurrence of landslides is significant to the development, but the

total aggregate area is relatively small compared to the total area of the

property. All of the active slides are localized and relatively super­

ficial. In addition to careful grading and surface drainage precautions,

mitigation measures for these slides inciude partial or complete removal of

the landslide debris, and reconstruction of the slope to the desired grades

using the excavated materials in well compacted buttress fills. Mitigation

measures for the older, inactive slides will depend upon several factors

including location relative to the develop:nent, planned grading, and the

potential for reactivation. Treatment of the old deep-seated slides, if

they exist, by the methods outlined above is technically possible although

their large size may make such measures economically unfeasible. It is

suggested that these areas be considered for use such as open space. The

existence of these slides should receive further investigation and if they

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are confirmed, special care should be taken in the grading plans so that any

grading in the area tends to improve slope stability.

Soil creep on the steeper slopes could damage structures located on

these slow-moving soils. To reduce the risk of damage, building foundations

should gain their support frcxn the stable rock or soil materials below the

zone of creep. Deepened foundations, drilled or cast-in-place concrete

piers penetrating to competent materials, and careful grading may provide

such support.

The mine workings include several deep vertical shafts and areas of

ground subsidence. Treatment of these workings may include backfilling and

possibly some grouting to ensure closure of them. The small areas of these

(:> workings should be avoided when siting permanent structures. Several tail­

ings piles·exist near the mine workings. These piles are generally small,

but may be Ulstable. Pei investigation to evaluate these tailings with

respect to potential toxicity will be conducted shortly and those materials

found to be toxic should be removed from the site. l'bntoxic tailings should

be stabilized using measures similar to those recomnended for mitigation of

0

active landslides.

Depending on the development plans, areas of persistent springs and

ground-water seepage may require subsurface drainage to intercept and divert

the seepage away frcxn development areas. The heavily saturated areas should

be considered for ponds, wetlands, or similar recreational usage. Care

should be taken to avoid placement of intercepted water onto areas

susceptible to erosion or slope instability.

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Where areas of steep slopes in weak soils and bedrock exist, hillside

grading to prepare level building and roadway sites involves an inherent

risk of slope stability problems, regardless of whether or not a landslide

presently exists. Where weak soils and bedrock are present, ground-water

seepage and erosion from concentrated surface runoff can often lead to new

slope instability. Careful site selection to reduce the amount of grading,

installation of adequate surface and subsurface drainage facilities, con-

struction of relatively flat cut and fill slopes of minimum depth, erosion

control, and corrective slope measures as for landslides should be applied

where development may exacerbate present slope stability problems or

adversely impact existing slopes.

~ The proximity of the project area to several major faults makes the site

susceptible to earthquake-induced geologic hazards such as landsliding and

settlement. To mitigate these hazards, the slope corrective and foundation

measures applied to the previously discussed geologic hazards should be

designed to include the applicable seismic forces. The presence of large

rock boulders below steep slopes indicates a potential hazard from falling

rock. This hazard can be minimized by careful siting of structures and

grading measures to remove the rock or provide barriers.

The seismic hazard is limited to these secondary effects of earth-

quakes. The on-site fault is not active and represents no restraint upon

the siting of structures.

Detailed geotechnical engineering studies including test borings and

laboratory testing should be performed to provide subsurface data for design

()before construction.

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VII REFERENCES

1. Bolt, G. A., and Miller, R. D., 1970, Seismicity of Northern and Central California, 1965-1969.

2. Brown, R. D., Jr., 1970, Faults That Are Historically Active or That Show Evidence of Geologically Young Surface Displacement, San Francisco Bay Region, U.S. Geological Survey (Basic Data Contribution).

3. california Division of Mines and Geology, Special Studies Zones, Cordelia Quadrangle, July 1, 1983.

4. Harding, C.R., 1929, Location and Design of Southern Pacific Canpany's Suisu.n Bay Bridge as Affected by Consideration of Earthquakes: Bulle­tin of the Seismological Society of America, Vol. 19, No. 3.

5. Harding Lawson Associates, Geologic Investigation, Fault Hazard, Plant Modernization Project, Shell Oil Refinery, Martinez, California, private consultation report dated April 30, 1979.

6. Herd, D. G., and 1-'elley, E. J., 1977, Faults with Quaternary Displace­ment, Northeastern San Francisco Bay Region, California, U.S. Geolog­ical Survey Map MF-881.

7. Lawson, A. C., 1908, The California Earthquake of April 18, 1906: Carnegie Institution of Washington, Publication 87, (reprinted 1969).

8. Lawson, A. C., 1914, Geologic Atlas of the l.Klited States, San Francisco Folio: U.S. Geological Survey.

9. Louderback, G.D., 1947, Central California Earthquakes of the 1830s: Bulletin of the Seismological Society of America, Vol. 37, No. 1.

10. Pampeyan, Earl H., 1979, Preliminary Map Showing Recency of Faulting in .Qagstal North-Central California, U.S. Geological Survey, Miscellaneous Field Studies Map MF-1070.

11. Ryall, A., Slemmons, D. B., and Gedney, L. O., 1966, Seismicity, Tectonism, and Surface Faulting in the Western Ulited States During Historic Time: Bulletin of the Seismological Society of America, Vol. 56, No. 5.

12. Sharp, R. B., 1973, Map Showing Recent Tectonic Movement on the Concord Fault, Contra Costa and Solano Counties, California, U.S. Geological Survey, Miscellaneous Field Studies Map MF-505.

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16.

Harding Lawson Associ•t•s

Sims, J. D., Fox, K. F., Bartow, J. A., and Helley, E. J., 1973, Preliminary Geologic Map of Solano County and Parts of Napa, Contra Costa, Marin and Yolo Counties, California, U.S. Geological Survey, Miscellaneous Field Studies Map MF-484.

Sonneman, H. D., and Switzer, J. R., Jr., Lllpt..blished Geologic Map of Benicia, Port Chicago, Honker Bay, Denverton, Fairfield, South Cordelia, and parts of adjacent quadrangles, California, 1961-1962.

Tolman, C. F., 1931, Geology of Upper San Francisco Bay Region: in Economic Aspects of a Salt Water Barrier Below Confluence of Sacramento and San Joaquin Rivers, California Division of Water Resources, Bulle­tin 28.

Townley, S. D., and All, Maxwell W., 1939, Descriptive Earthquakes of the Pacific Coast of the United States, Seismological Society of America, Vol. 29, l'b. 1.

Catalog of Bulletin of the

y--17. Weaver, C. E., 1949, Geology and Mineral Deposits of anl&neric~ Area

North of San Francisco ~California Diyision of Mines, Bulletin 149.

Aerial Photos Examined Le J{,-N_:~:

Date

3/6/85 3/6/85

Code

842518 842518

Flight Line Exposures.

1 2.

121, 122, 124 135 - 138

16

)

)

C" ..,. c

) I

EXPLANATION -

AGE SYMBOL FORMATION

T af Mine Tailings

Qls Active Ll.ndslide Quaternary

....

+ Qols? Pouible Old Landslide Deposit ~ GREAT VALLEY SC GU ENCE ~

Kg vs Unc:rned Formation. largely s.andstan., Cretaceous with mudstone. ~le, lim~tone

t KJvgm Unamed Formation, largely mudstone, with shale, sandstone, limestone

0 FRANCSICAN ASSEMBLAGE Cretaceous-KJa Jur~sic

Altered Rock, largely greenstooe

I 1 KJfd Diabase

KJfg Groenstooe, 1..-gely basalt

., I

, i I tT SITE\iOUNDARY ! ~ l % ', ,.., '

#4 ~ : I

,, ~ '

" .... ~ ~ "'--.... ...

' ~ ( ·' . 500 1000 feet '~ SCALE

II

'

I

j

I I I I I I \~ \..£. \

--,1~ I ';

"' -<

" ::n (I~ I I J

\ ~

'V

\

---·' ~,, ·.

..... •.

J '"!.t~~

I I

C: ~Vt I

I

I Kg vs I

I I

- \ ~ ~ -----~ !

I

,1~ I

\

\

I

I I

)

\ ' \. \

~ ,,

'.,. __ _ '..!

EXPLANATION .. ....,,-. ....... Geologic Contact

---··· l.nactive Fault (dotted where COOO!aled)

'ft, G:> Landslide, queried where unceruii:i

~ Spril'lll or Seep

x Mine Working

~ Test Pit Location

Test Pit SV-1

180

-"' "' -z 175 0 f-<(

> lJ.J _J

lJ.J

170

Test Pit SV -2

220

-;:;

"' ~ z 0 215 f-<(

> lJ.J _J

lJ.J

210

~ H.ordln.g La~~n Aneoclotea Engineers. Geologists & Geophys1crsls

[)"IAW,._ JOB NUMBER

JAS 17450 001 01

NE 4°

DARK BROWN SANDY CLAY ICL1 moi~t. moderately stiff, roots

LIGHT BROWN SANDY CLAY ICL1 moist, fine-grained, very stiff

LIGHT BROWN SIL TY SANO ISM! moist, fine-grained, very dense

NW 293°

DARK BROWN SANDY CLAY ICLI moist, very stiff, roots near surface

GRAVELLY CLAYEY SAND !SCI moist

BROWN MUDSTONE intensely fractured

GREEN-BROWN MUOSTONE moderately strong, thin-bedded, moderately hard, moderately weathered

Log of Test Pits SV · 1 and SV -2 Sky Valley Country Club Solano County, Ca1·1forn·1a

APPRQVEO OATE r'".:.<-J A /QC:..

REV1SED OA.1 ~

~ . .:..·:

~

-., ., -z 0 t-<I: > UJ _, UJ

-., ., -z 0 t-<I: > UJ _, UJ

DRAWN

JAS

Test Pit SV-3

325

320

315

Test Pit SV-4

380

375

370

H..rcllng t...:tGOft Aa~o Engineers. Geologists & Geophysicists

JOe NU~BER

17450,001.01

NW 286°

DARK BROWN SANDY CLAY ICU

moist, stiff, roots

'---WHITE CLAY (Cl) moist, stiff, sheared

'-----GRAY MUDSTONE

NW 292°

sheared, intensely fractured, moderately weathered, abundant calcite

'---DARK BROWN CLAY ICU moist, with roots, minor silt and sand

LIGHT BROWN GRAVELLY SANDY CLAY (CL) moist, stiff, mudstone gravels

'------GRAY MUDSTONE moderately hard and strong, highly fractured, pervasively sheared, moderately weathered

Log of Test Pits SV-3 and SV-4 Sky Valley Country Club

Solano County. California

°'" 4/85 RfV!SE!J

3 °"''

..

Test Pit SV·S

530

-"' .)':

z 0 I- 525 <! > UJ _J

UJ

520

Test Pit SV-6

565

- 560 "' .)':

z 0 I-<! > 555 UJ _J

UJ

550

, -~ Harding La~o.on Aaa.oclat••

Engineers. Geolog1s1s & Geophysicists

DAAWP>f .JOB NUMBER

JAS 17450,001.01

NE 80°

NE 82°

DARK BROWN SANDY CLAY ICU moist, stiff, with roots and organic material

RED-BROWN AL TE RED ROCK sheared, moist, highly altered

DARK BLACK-BROWN SANDY CLAY ICU

moist, moderately stiff, with roots

+---+----RED-BROWN GREENSTONE highly fractured, deeply weathered

log of Test Pits SV-5 and SV-6 -- -

Sky Valley Country Club 4 Solano County, California

APPROVED .DATE RE 11•SE:· :;,.:..·,

t:L~ 4/85

-QJ QJ -z 0 I­<{

> lJJ _J

lJJ

-QJ

"' -z 0 I-<{

> lJJ _J

lJJ

DRAWN

JAS

Test Pit SV-7

530

525

520

Test Pit SV-8

730

725

720

Hording Lawson Aaaoclato• Engineers. Geologists & Geophysicists

JOB NUMBER

17450,001.01

NE 62°

NE 52°

...__---~-=:::::::::-:r-= DARK BROWN SANDY CLAY ICU moist, moderately stiff, with roots

RED AND BLACK GREENSTONE closely fractured, moderately strong and hard, moderately weathered

BLACK SANDY CLAY ICLl moist, moderately stiff. with roots

RED-BROWN SANDY GRAVEL IGPI moist, dense

BROWN AND BLACK GREENSTONE deeply weathered, highly fractured, modefately strong and hard

Log of Test Pits SV-7 and SV-8 Sky Valley Country Club Solano County, California APPROVEO DATE R[VtSEO

t;Zd 4/85

5

z 0 f­<! > lJ.J _J

lJ.J

Test Pit SV-9

760

755

750

745

Test Pit SV-10

735

NE 40°

4-..J----BLACK SANDY CLAY (CL) moist. moderately stiff, with roots

+--+------RED-BROWN CLAYEY SANDY GRAVEL (GPJ moist, dense, gravel to 3-inch diameter

NW 272°

\---------------~~~,,__ ___ DARK BROWN CLAYEY GRAVEL (GCI moist, gravel to 3-inch diameter -"' .!!!

z 0 f-<! > lJ.J _J

lJ.J

DRAWN

JAS

730

725

Harding L.awD-On Aasoclat•• Engineers. Geologists & Geophysicists

JOB NUMBER

17450.00101

-+---,-----~----BLACK AND BROWN GREENSTONE closely fractured, moderately strong and hard, deeply weathered

/'----- CLAY (CL) moist, stiff, sheared

Log of Test Pits SV-9 and SV-10 Sky Valley Country Club Solano County, California

DATE

4/85 R[VISE_i)

6

• •

z 0 I­<(

> UJ _J

UJ

~

"' ~ z 0 I-<(

> UJ _J

UJ

OAAWN

JAS

Test Pit SV-11

685

680

675

Test Pit SV-12

440

435

430

425

H.ardJng Uw-GOn Aa.o.oclates Engineers. Georog1sts & Geophysicists

JOB NUMBER

17450.001.01

NW 276°

_.,_ ___ DARK BROWN CLAY (CL) moist, moderately stiff, minor sand, roots

-+---1----RED·BROWN GRAVELLY SANDY CLAY !CU moist, very stiff, Y2-inch gravel

NE 52°

-...,<---DARK BROWN SANDY CLAY ICLI moist, moderately stiff, roots

+-,f------RED-BROWN GRAVELLY CLAY ICU wet, moderately stiff

..__,,,_ ____ LIGHT BROWN CLAYEY GRAVEL IGCI moist, very dense, angular gravel to 2-inches

--,,£----LIGHT BROWN MUDSTONE highly fractured, moderately strong, low hardness

Log of Test Pits SV-11 and SV-12

Sky Valley Country Club

Solano County. California

QA.TE

4/85

-"' "' -z 0 I­<(

> UJ .J UJ

-

Test Pit SV-13

405

400

395

390

Test Pit SV-14

335

"' 330 ~

z 0 I­<(

> UJ .J UJ

325

320

Hnrdlng Lawson Aon.ocloto• Engineers. Geologists & Geophysicists

OAA ... N JOB NUMBER

JAS 17450.001.01

NE 67°

NE 78°

-..--1'---- DARK BROWN SANDY CLAY ICU moist, moderately stiff

-4--+------ becoming calcareous

-4--4------ LIGHT BROWN SILT (ML) dry, mottled, calcareous, appears to be from altered rock

4---/.---DARK BROWN CLAY (CU moist, stiff, roots

..,_ __ .,__ ____ LIGHT BROWN CLAY ICU moist, very stiff, calcareous. gravel to Y2·inch, some shearing

Log of Test Pits SV-13 and SV-14 Sky Valley Country Club

Solano County, California

Cot.TE

4/85 REV1SED

.. '

!)RAWN

JAS

Test Pit SV·15

285

-"' ~ z 0

280 f-<(

> w --' w

275

Test Pit SV·16

445 -;:::

"' "' -z 0 f-<( 440 > w --' w

Test Pit SV-17

500

-"'

NE 81°

---+---BROWN CLAY ICU .....__~----.1 moist, moderately stiff, roots

LIGHT BROWN CLAYEY GRAVEL IGC} moist dense, mudstone. gravel to 3 Inches

-+--/-'-----GRAY AND BROWN MUDSTONE

NE 87°

NE 69°

well-bedded, moderately hard and strong, moderately weathered

BROWN CLAY ICU moist, moderately stiff, roots, angular gravel to 2-inch diameter

CLAYEY GRAVEL IGCl moist. dense

BROWN AND GRAY MUDSTONE damp, well bedded, highly fractured, moderately hard and strong, moderately weathered

~

z 1---:--~~~-~~~~-~~~_.;.-~---BROWNCLAYICL} \ moist, stiff, angular

0 f-<(

> w --' w

495

490

Hording LaoaD..on Asu:s..(>Clotea Engineers. Geo1og1s1s & Geophys1c1sts

JOB NUMBER

17450 001.01

gravel to 2·inches. minor sand

~---LIGHT BROWN GRAVELLY CLAY ICU moist, stiff. angular mudstone gravels to 2-inch diameter

'-----BROWN AND GRAY MUDSTONE moist. highly and irregularly fractured, sheared, occasional limestone inclusions and thin sandstone

Log of Test Pits SV-15, SV-16 and SV-17 Sky Valley Country Club

Solano County, California

""" 4/85

'

Test Pit SV-18

195

~ ... 190 ... -z 0 I-<(

> w --' 185 w

180

Test Pit SV-19

185

~ 180 ... ... -

z 0 I-<(

> w 175 --' w

170

~ H.ardlng Lawson As.a.oclat.es Engineers. Geologists & Geopnys1cists

0AAW'N JOB NUUBER

JAS 17450.001.01

NE 87°

NE 48°

DARK BROWN SANDY CLAY ICU

moist, moderately stiff, roots

LIGHT BROWN GRAVELLY SANDY CLAY ICU

moist, stiff, calcareous

BROWN GRAVELLY CLAYEY SAND ISC)

moist, medium dense, weathered mudstone pieces to 1 O·inches

WHITE AND BLACK MOTTLED CLAY ICL·CHl

stiff, plastic, sheared

BROWN CLAY (CL) moist, stiff, plastic, minor sand

YELLOW-BROWN CLAYEY SILT (ML). moist, very stiff

DARK BROWN SANDY CLAY ICU

moderately stiff, roots, moist

SANDY GRAVELLY CLAY ICU damp, very stiff, mudstone gravel

to 2-inch diameter

----WHITE AND BLACK MOTTLED SANDY CLAY ICLI

damp, stiff. sheared

BROWN SANDY CLAY ICLI damp, very stiff, sheared

Log of Test Pits SV-18 and SV-19 :: _t..:;

Sky Valley Country Club iJ 0 Solano County, California

APr>~ovED °"" ;::!fOISC.0 DA1E

€Z-W 4/85

0

z 0 I­~ > w _J

w

z 0 I­~ > w _J

w

JAS

Test Pit SV-20 NE 74°

245

------------~:==::::_::;z;DARK B.ROWN SANDY CLAY (CU moist, moderately stiff, roots, calcareous in lower horizon

240

235

230

Test Pit SV-21

225

220

215

210

Hnrdlft9 Lawson Aaa.oolatea Engineers. Geologists & Geophysicists

J06 NUl.IBEA

17450.001.01

LIGHT BROWN GRAVELLY CLAY (CLJ moist, stiff

-+-----BROWN AND GRAY MUDSTONE

NE ss0

well-bedded, closely fractured, moderately strong and hard

DARK BROWN SANDY CLAY (CL)

mo.1st, moderately stiff, roots

GRAVELLY CLAY ICLI moist, stiff, gravel to 3 inches

BROWN CLAY ICLI moist, moderately stiff, sheared, cobbles of mudstone and sandstone

Log of Test Pits SV-20 and SV-21 Sky Valley Country Club

Solano County, California

"PPRQvEQ DATE R£VISEO

€4.J 4/85

JAS

MAJOR DIVISIONS

GRAVELS

'"40RE THAN HALF COARSE FRACTION

IS LARGEi=t THAN No " SIEVE SIZE

SANDS

MORE THAN HALF COARSE FRACTION 1$ SMALLER THAN NO 4 SIEVE SIZE

CLEAN GRAVELS WITH LITTLE QR NO FINES

GRAVELS WITH OVER 12% FINES

CLEAN SANDS WITH UTILE OR NO FINES

SANOS WITH OVER 12°11 FINES

GW

GP

GM

GC

·.# ''>.1.

14

.... SW I-••••

• •

SP

SM

• • • • • •• . . .

• . . SC :Y.Y-

• ...: ML

~~ ~ ...J "j SILTS AND CLAYS ~ 0-:;/.w CL,/

LIQUID LIMIT 50°;, OR LESS // U)~~ I 11 o~~ ~ w~8 1111

TYPICAL NAMES

WELL·GAADE:'.:I GRAVELS GfiAVEL·SAND MDCTUAES

P()QRLY G=tA.UEO GRAVELS. GRAVEL·SANO J.AIXTURES

SILTY GRAVE~ POORLY GA.A.OED GRAVEL· SANO·SIL":' J.AtXTURES

CLAYEY G~VELS. PCORLY GRADED GRAVEL SANO·CL.AY MIXTURES

WELL· GRADED $A.NOS. GRAVELLY SANDS

PCORLY G;::\ADED SANDS. GRAVELLY SANDS

$1LTY SANDS POORLY GRADED SAND·SILT MIXTURES

CLAYEY SANDS. POORLY GRADED 5.AJ-.10-ClAY UIXTURES

INORGANIC SILTS ANO VERY FINE SANDS ACX:K FLOUR. SILTY OR CLAYEY FINE SANDS. OR CtAYEY SILTS WITH SLIGHT PLASTICITY

INORGANIC CLAYS OF LOW TO MEDIUM PlASTICITY. GAAVELLY CLAYS. SANDY CLAYS. SILTY ClAYS. LEAN CLAYS

ORGANIC Cl.AYS AND ORGANIC SILTY CLAYS OF LOW P\ASTICITY

z~~ 1111 - ~ ci >-----------------<f----+-t-++-f--l-N_OA_GA_N_IC_Sl-LT-S-.-... -1-CA_C_E_O_U_S_O_R _______ _.

~ ~ ~ ·MH DIATOMAOOUS FINE SANDY OR SILTY SOILS. C) ~ < ELASTIC SILTS

,:i :J' i" SILTS AND CLAYS CH Y} INORGANIC SILTS. MICACEOUS OA z ~ / ..('~ DIATOMACCOUS FINE SANDY OR SILTY ""' LIOUIO LIMIT GREATER THAN 50°1, ~ // SOILS. ELASTIC SILTS u::

OH

HIGHLY ORGANIC SOILS pt

~~j ORG.AN1C CLAYS OF MEDIUM TO HIGH ~4}. Pt.ASTICITY. ORGANIC SILTS

PEAT AND OTHER HIGHLY ORGANIC SOILS

UNIFIED SOIL CLASSIFICATION SYSTEM

Perm

Conso1

LL

Pl

G, MA

a ~

Permeability

Consol1dat1on

L1qu1d L1m11 ( 0/o)

Plastic Index ( 0/o)

Soecif1c Gravity

Particle Size Analysis

"Und1slurbed" Sample

Bulk or Classillca!lon Sample

H.nrdlng Laws.on Aaaoclatea Engineers. Geologists & Geophysicists

.JOa ~.:_oMSC:R

17450 001 01

Shear Strength (psl)t

TxUU 3200

f Confining Pressure

{2600) Unconsolidated Undrained Triax1a1 Shear

(FMJ01!S) TxCU 3200 12600)

(P)

TxCD 3200 126001 sscu 3200 (2600)

(P)

SSCD 3200 12600) DSCD 2700 12COO) UC '70 LVS 700

KEY TO TEST DATA

(liekl m::i1s!ure or saturated)

Consohdated Undrained Triax1a1 Shear (with or 'Mlhoul pore pressu:e measurement) Consoltdated Drained Triaxcal Shear Simple Shear Consolidated Undrained (w1th or Without wre pressure measurement Simple Shear Consol1daled Drained Consohdated Drained Direct Shear Uncoohnea Co--noress1on

Lab0ra1ory Vane Shear

Unified Soil Classification System and Key to Test Data Sky Valley Country Club Solano County, California APPROVED o..a.~c :,:. -;

au' 4/85

0

... "'I

~

• . .:

JAS

CONSOLIDATION OF SEDIMENTARY ROCKS; usua11v ae!erm1nec from ur!wea1ne•eo sam:it~s La·;e!y depenoent on cemen1at1on

U = unconsolidated P = poorly conso11aatea M = mOderately consohda1ed W = well consohOated

II BEDDING OF SEDIMENTARY ROCKS

Splitting Property Massive Stocky Slabt>y F1aggy Shaty or p1a1y Papery

111 FRACTURING

Intensity Very l1t11e Ir actured Occas1onally lracfured Moderately lractured Closely fractured Intensely lraciureo Crusneo

IV HARDNESS

Thickness Greater !han J 0 11 2 0 10 4 c :i 0 210 2 0 fl 0 05100 2 !: 001100051: tess lhan 0 o·. Ii

Stratification verv 1n1cl< oeddec 1n1ck.·oeaaeo 1n1n.oeoaeo very tn1n-Dedaeo:::

1am1na:ec !h1n1y 1am1natec

Size of Pieces in Feet Greater tncin 4 0 10104 0

0 510 1 0 0, 100 5 0 05 100 1 Less 1nan O 05

1 . Soft - Reserved for plas11c ma1er1al alone 2. 3.

4. 5.

Low hardness - can be gouged deeply or carved easily w1tn a '-ln1fe blade Moderately hard - can be readily scratched by a kn1te 01aae scratch leaves a neavy :ra:::e ~· -:"L:s: an::: ·s readily visible alter the powder has oeen blown away Hard - can be scratched with d1tl1cu11y. scratch produces little oowaer and rs ol!er. !ain!ly v1s.01e Very hard - cannot oe scratcned wtth knife blade. leaves a r:ietall1c streak

V STRENGTH

1. Plastic or very low strength 2. Friable - crumoies easily by rub01ng w1tn fingers 3. Weak - An unfrac1urea specimen ol such material will crumo1e unaer i1gn1 ~ammer oiows 4. Moderately strong - Soec1men will w1lhs1and a !ew heavy ~a:n:net olows oe!ore o•eak1n;; 5. Strong - Soec1men win withstand a few heavy nng1ng nammer c1ows ana will yield win··, a1!hcu::y omy

dust and small flying !ragmenls 6. Very strong - Specimen will res1s1 heavy ringing hammer blows and will y1e!d w1i'l a1lf1cu11y on:y di.;s: ar.c

small flying fragmen1s

VI WEATHERING - The physical and chemical d1sint1grat1on ana aecomoos1!1or. ol rocl.:s ana m1~e~a:s o~ nalural processes such as o:i.1dation. reduction. hydra11on. solution. caroona11on and 1reez1ng anc !:iaw1ri;;

0. Deep - MOderate to comp!e!e mineral decomposrt1on. e:i.tensive d1s1ntegra11on deep ana l'lGroug:-> ::l"~ coloration: many lraclures. all exlens1vely coated or filled with oudes caroona:es and!Or c!ay o• s1J:

M. Moderate -- Sligh! change or oan1a1 decomoos1t1on ot m1nerats ht Ile d1s1n:e<;ra11on cement.a11ori l'l::J? ~.c. unaffected Moderate to occasionally intense d1sco1orat1on Moaerately coa;ec trac1 ..... res

L. Little - No megascooic decompos111on of minerals. little or no ellect on norm.al cernen1at1on 511cn~ ano interm111ent. or iocallzea discoloration Few stains on fracture surfaces -

F. Fresh - Unallected by weathering agents No d1s1ntegrat1on or d1sco101a11on Frac1ures usuatfy 1ess. numerous than 1oints

Harding L•waon Aaa.oclat•• Engineers Geo1og1s1s & Geophys1c•s1s

JC: "~·.'SE_:..

17450.001.01

Physical Properties Criteria for Rock Descriptions Sky Valley Country Club Solano County. California

4/85 -: . ::·.

-<"-

' i ' ·- ···- ----~. -----------------·

--~-

·...: ·~ .

"

,/.,;

I r (---------' ',\

,•

"

•. ·,"

. (.

" f' .,. . ·'

. -~

' ·'··

LEGEND

PROPERTY LINE {APPROXIMATE LOCATION ONLY)

STUOY AREA LINE

SPHERE OF INFLUENCE LINE

DESIGNATED PARCEL NUMBER

STUDY AREA MAP SKY VALLEY/LAKE HERMAN AREA

CITY OF BENICIA, SOLANO COUNTY, CALIFORNIA

,,,: ..

CITY OF BENICIA 'HEET NO.

DATE: t-16-86 PLANNING DEPARTMENT

BEJCICIA CALtfORNtA 863039

-------------- ---- . --·----------- ----

•'·· .,_ "• , ..... ., .. '· . . ; ...

J '•'. . '• ; .. ·· .f ~ . '

. ,. .., ' ... ,i:;.

_r

..~~{:~ '-'<t'•:<'\"'~""t~.

;.-.~;..· . ..+ "'"''

----

--~--_, . - ~.

SOUTHAMPTON '

· ....

,.1 :

.. , '

•' '-·~ . ..: .. !·

--,.

.. --.. : ;;.,:,);· ..,, ,,,.,

. •.

\ 1• .

. J'' ..

_',,,

'

. .• , ,j;

J

----- ~-· - ., - .

. .....

j·'. .. ')''.

'· •

------

. '_,,, .-

-. ... :· ~ "

----

'::

·-·---1--------------~------------·-----' I

" .r·

\

\ ./ -'r --------· j \ .. '

. 11.T ' '! -.i.'I . t

I ,--\ \ . _,.;:

·, ..

I ( : 1 :.~.;,',"! ., ~ -~ .. -. -· -··1·-~ ::; ,

r:

;

l'ARC[l

--~----

I-A

1-B

2-A

1-B

3

4

5

6

B

9-A

9-B

10-A

10-B

11-A

11-B

c1rr or urr11c1A

CITY or B[NIC!A

MEDEIROS

MEDEIROS

SKY VALL[Y GROUP

GOMEZ

M. BORGES

LAKE fl[RHAfl ASSOC !ATES

HHAI. Al<[A ________ _(_~'~") --

630.0

175.5

252.6

125. 2

351. 5

45.3

233.6

170.9 PORTION OF CITY OF B[NJCIA 34.0

PORTIO/I OF l.T. CORP. 639.0 PORTION OF P. G.1.E. 854_0

PORTION OF P.G.&E. 210.0

PORTION OF SINCLAIR 375.4 PORTION OF SINCLAIR 85.2 PORTION OF CITY OF SANTA CLARA 55.0

PORT!Ofl OF CITY OF SANTA CLARA ~-.Q TOTAL -

4,327.2

.•,.

•...

\ .·l·.

) \ LJ

·-· -----. ---

" "

----------' -----------------,--- ------- --r ,---·-----

·.i ·

'•

,~ ... l' ' ' ,, 'I•

i

/

"' ,·-

---------- - ----

·~ .. '

;:,

,, '