VOLUME 15 OF 45
CONTRA COSTA COUNTY, CALIFORNIA AND INCORPORATED AREAS Community Community Name Number ANTIOCH, CITY OF 060026 BRENTWOOD, CITY OF 060439 CLAYTON, CITY OF 060027 CONCORD, CITY OF 065022 DANVILLE, TOWN OF 060707 EL CERRITO, CITY OF 065027 HERCULES , CITY OF 060434 LAFAYETTE , CITY OF 065037 MARTINEZ , CITY OF 065044 MORAGA , TOWN OF 060637 OAKLEY , CITY OF 060766 ORINDA, CITY OF 060722 PINOLE, CITY OF 060032 PITTSBURG, CITY OF 060033 PLEASANT HILL, CITY OF 060034 RICHMOND, CITY OF 060035 SAN PABLO, CITY OF 060036 SAN RAMON, CITY OF 060710 WALNUT CREEK, CITY OF 065070 CONTRA COSTA COUNTY (UNINCORPORATED AREAS) 060025
REVISED March 21, 2017 Federal Emergency Management Agency FLOOD INSURANCE STUDY NUMBER 06013CV005C
TABLE OF CONTENTS, continued
VOLUME 5 – March 21, 2017
Exhibit 1 – Flood Profiles (continued)
Murderers Creek Panels 121P-122P North Branch Stone Valley Creek Panel 123P Old Kirker Creek Panel 124P Orinda Village Overflow (From San Pablo Creek) Panel 125P Overhill Creek Panel 126P Pacheco Creek Panel 127P Payton Slough Panel 128P Pine Creek Panels 129P-133P Pinole Creek Panels 134P-141P Refugio Creek Panels 142P-146P Reliez Creek Panels 147P-153P Rheem Creek Panel 154P Rodeo Creek Panel 155P Sand Creek Panels 156P-158P San Pablo Creek Panels 159P-166P San Ramon Creek Panels 167P-171P Sans Crainte Creek Panels 172P-175P Sans Crainte Creek Tributary A Panel 176P Shore Acres Creek Panels 177P South Branch Moraga Creek Panels 178P-180P South San Ramon Creek Panels 181P-182P South San Ramon Creek (Overbank Flooding) Panel 183P St. Marys Road Tributary Panels 184P-185P Stone Valley Creek Panel 186P Sycamore Creek Panels 187P-188P Tice Creek Panels 189P-190P Tice Creek Overflow Panel 191P Walnut Creek Panel 192P West Antioch Creek Panels 193P-199P West Branch Alamo Creek Panels 200P-201P West Branch East Antioch Creek Panels 202P-204P West Branch Refugio Creek Panels 205P-208P Wildcat Creek Panels 209P-212P Willow Creek Panels 213P
Published Separately – Flood Insurance Rate Map Index Flood Insurance Rate Maps
v
NOTICE TO FLOOD INSURANCE STUDY USERS
Communities participating in the National Flood Insurance Program have established repositories of flood hazard data for floodplain management and flood insurance purposes. This Flood Insurance Study (FIS) may not contain all data available within the repository. It is advisable to contact the community repository for any additional data.
Part or all of this FIS may be revised and republished at any time. In addition, part of this FIS may be revised by the Letter of Map Revision process, which does not involve republication or redistribution of the FIS. It is, therefore, the responsibility of the user to consult with community officials and to check the community repository to obtain the most current FIS components.
Initial Countywide FIS Effective Date: June 16, 2009
Revised Countywide FIS Dates: September 30, 2015 March 21, 2017
TABLE OF CONTENTS
VOLUME 1 – March 21, 2017
Page
1.0 INTRODUCTION...... 1
1.1 Purpose of Study ...... 1 1.2 Authority and Acknowledgments ...... 1 1.3 Coordination ...... 9
2.0 AREA STUDIED ...... 11
2.1 Scope of Study ...... 11 2.2 Community Description ...... 14 2.3 Principal Flood Problems ...... 16 2.4 Flood Protection Measures ...... 29
3.0 ENGINEERING METHODS ...... 38
3.1 Hydrologic Analyses ...... 38
TABLES
Table 1: Initial and Final CCO Meetings ...... 9 Table 2: Flooding Sources Studied by Detailed Methods ...... 11 Table 3: Flooding Sources Studied by Approximate Methods ...... 13 Table 4: Letters of Map Change ...... 14 Table 5: Historic Floods ...... 31 Table 6: Summary of Discharges ...... 56 Table 7: Summary of Elevations ...... 67
i
TABLE OF CONTENTS, continued
VOLUME 2 – March 21, 2017
Page
3.0 ENGINEERING METHODS, continued ...... 68
3.2 Hydraulic Analyses ...... 68 3.3 Vertical Datum ...... 105
4.0 FLOODPLAIN MANAGEMENT APPLICATIONS ...... 108
4.1 Floodplain Boundaries ...... 108 4.2 Floodways ...... 116
FIGURES
Figure 1. Floodway Schematic...... 124
TABLES, continued
Table 8: Manning’s “n” Values ...... 97 Table 9: List of Structures Requiring Flood Hazard Revisions ...... 101 Table 10: List of Certified and Accredited Levees ...... 103 Table 11: Vertical Datum Conversions ...... 105 Table 12: Topographic Map Information ...... 109 Table 13: Floodway Data ...... 125
ii
TABLE OF CONTENTS, continued
VOLUME 3 – March 21, 2017 Page
5.0 INSURANCE APPLICATIONS ...... 169
6.0 FLOOD INSURANCE RATE MAP ...... 170
7.0 OTHER STUDIES ...... 173
8.0 LOCATION OF DATA ...... 173
9.0 BIBLIOGRAPHY AND REFERENCES...... 173
10.0 REVISIONS TO THIS FIS ...... 186
10.1 Coastal Analyses ...... 186 10.2 Coastal Floodplain Boundaries ...... 189 10.3 Second Revision – Riverine Analyses ...... 196
FIGURES, continued Figure 2: Transect Location Maps ...... 190
TABLES, continued
Table 14: Community Map History ...... 171 Table 15: Transect Data Table ...... 194
EXHIBITS
Exhibit 1 – Flood Profiles
Along Giant Road from Standard Oil Tank to Rheem Creek Panel 01P Appian Creek Panel 02P Arroyo Del Hambra Creek Panels 03P-04P Brookside Road Tributary Panel 05P Brushy Creek Panels 05P(a)-05P(i) Cascade Creek Panel 06P Clayton Valley Drain Panels 07P-09P Corliss Drive Tributary Panels 10P-11P Deer Creek Panel 12P Ditch No. 2 Panels 13P-14P
iii TABLE OF CONTENTS, continued
VOLUME 3, continued – March 21, 2017
Exhibit 1 – Flood Profiles (continued)
Donner Creek Panel 15P East Antioch Creek Panels 16P-19P East Branch Green Valley Creek Panel 20P East Branch Homestead Creek Panel 21P East Branch Refugio Creek Panels 22P-23P East Fork Grayson Creek Panels 24P-25P Farm Bureau Road Drain Panel 26P Frisk Creek Reach 1 Panels 26P(a)-26P(b) Frisk Creek Reach 2 Panel 26P(c) Galindo Creek Panels 27P-32P Garrity Creek Panel 33P Grayson Creek Panels 34P-35P VOLUME 4
Exhibit 1 – Flood Profiles (continued)
Green Valley Creek Panels 36P-40P Grizzly Creek Panels 41P-42P Happy Valley Creek Panels 43P-45P Hidden Valley Creek Panel 46P Hillcrest Branch East Antioch Creek Panels 47P-48P Homestead Creek Panel 49P Ivy Drive Tributary Panel 50P Jonas Hill Creek Panels 51P-52P Kellogg Creek Panels 52P(a)-52P(f) Kellogg Creek Split Flow Panel 52P(g) Kirker Creek Panels 53P-57P Lafayette Creek Panels 58P-60P Laguna Creek Panels 61P-64P Larch Creek Panels 65P-67P Las Trampas Creek Panels 68P-80P Lauterwasser Creek Panels 81P-83P Lawlor Creek Panels 84P-85P Line A, DA-40 Panel 86P Los Medanos Wasteway Panels 87P-89P Mangini Creek Panel 90P Markley Creek Panels 91P-93P Marsh Creek Panels 94P-100P Middle Branch West Antioch Creek Panels 101P-102P Miranda Creek Panels 103P-104P Mitchell Creek Panels 105P-106P Moraga Creek Panels 107P-109P Mt. Diablo Creek Panels 110P-119P(e) Mt. Diablo Creek-Split Flow Panel 120P
iv
TABLE OF CONTENTS, continued
VOLUME 5 – March 21, 2017
Exhibit 1 – Flood Profiles (continued)
Murderers Creek Panels 121P-122P North Branch Stone Valley Creek Panel 123P Old Kirker Creek Panel 124P Orinda Village Overflow (From San Pablo Creek) Panel 125P Overhill Creek Panel 126P Pacheco Creek Panel 127P Payton Slough Panel 128P Pine Creek Panels 129P-133P Pinole Creek Panels 134P-141P Refugio Creek Panels 142P-146P Reliez Creek Panels 147P-153P Rheem Creek Panel 154P Rodeo Creek Panel 155P Sand Creek Panels 156P-158P San Pablo Creek Panels 159P-166P San Ramon Creek Panels 167P-171P Sans Crainte Creek Panels 172P-175P Sans Crainte Creek Tributary A Panel 176P Shore Acres Creek Panels 177P South Branch Moraga Creek Panels 178P-180P South San Ramon Creek Panels 181P-182P South San Ramon Creek (Overbank Flooding) Panel 183P St. Marys Road Tributary Panels 184P-185P Stone Valley Creek Panel 186P Sycamore Creek Panels 187P-188P Tice Creek Panels 189P-190P Tice Creek Overflow Panel 191P Walnut Creek Panel 192P West Antioch Creek Panels 193P-199P West Branch Alamo Creek Panels 200P-201P West Branch East Antioch Creek Panels 202P-204P West Branch Refugio Creek Panels 205P-208P Wildcat Creek Panels 209P-212P Willow Creek Panels 213P
Published Separately – Flood Insurance Rate Map Index Flood Insurance Rate Maps
v
110 110
100 100
BOYD ROAD
SHELLY DRIVE
PRIVATE ROAD
SOULE AVENUE CULVERT
ROBERTA AVENUE
90 CONFLUENCE WITH 90
HAWTHORNE DRIVE
EAST FORK GRAYSON CREEK
80 80
MURDERERS CREEK
FLOOD PROFILES
OAK PARK
BOULEVARD 70 70
CULVERT 60 60
ELEVATION IN FEET (NAVD 88)
50 50
H I
40 40 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 30 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D E F G CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 20 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH EAST FORK GRAYSON CREEK 121P 160 160
CULVERT
150 150
OAK PARK LANE
PRIVATE BRIDGE PRIVATE BRIDGE PRIVATE BRIDGE PRIVATE BRIDGE 140 UNNAMED ROAD 140
CANAL FRONTAGE ROAD
130 130
MURDERERS CREEK
FLOOD PROFILES
PRIVATE BRIDGE 120 WITHERS AVENUE 120
PLEASANT HILL ROAD
LIMIT OF DETAILED STUDY
110 110
ELEVATION IN FEET (NAVD 88)
100 100
90 90 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 80 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
J K L M N O CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 70 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH EAST FORK GRAYSON CREEK 122P 360 360 THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
350 350
AUSTIN LANE
ANGELA AVENUE
340 MIRANDA AVENUE 340
CONFLUENCE WITH
STONE VALLEY CREEK
LIMIT OF DETAILED STUDY
330 330
FLOOD PROFILES CULVERT
320 320
NORTH BRANCH STONE VALLEY CREEK
CULVERT
310 310
ELEVATION IN FEET (NAVD 88)
300 300
290 290 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 280 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D E F CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 270 0 500 1000 1500 2000 2500 3000 3500 4000 4500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STONE VALLEY CREEK 123P
460 460
450 450
ORINDA WAY 440 440
CAMINO SOBRANTE
AVENIDA DE ORINDA
CONFLUENCE WITH SAN PABLO CREEK DIVERGENCE FROM SAN PABLO CREEK
430 430
FLOOD PROFILES
420 420
ORINDA VILLAGE OVERFLOW (FROM SAN PABLO CREEK) 410 410
ELEVATION IN FEET (NAVD 88)
400 400
390 390 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 380 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
Y Z CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 370 0 200 400 600 800 1000 1200 1400 1600
FEDERAL EMERGENCY MANAGEMENT AGENCY *DATA NOT AVAILABLE STREAM DISTANCE IN FEET ABOVE CONVERGENCE WITH SAN PABLO CREEK 125P 540 540
530 530
520 520
LIMIT OF DETAILED STUDY
510 510
OVERHILL CREEK
FLOOD PROFILES
500 500
LIMIT OF DETAILED STUDY
490 490
ELEVATION IN FEET (NAVD 88)
480 480
470 470 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 460 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 450 200 400 600 800 1000 1200 1400 1600 1800 2000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO CREEK 126P 30
25
20
SANTA FE RAILROAD
BURLINGTON NORTHERN
LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY
15
PACHECO CREEK
FLOOD PROFILES
10
5
ELEVATION IN FEET (NAVD 88)
0
-5 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD -10 10% ANNUAL CHANCE FLOOD STREAM BED
AND INOCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA -15 12500 13500 14500 15500 16500 17500 18500 19500 20500 21500 22500 23500 24500 25500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CARQUINEZ STRAIT 127P 50 50 THE 0.2% CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
40 40
MAIN ROAD
30 INTERSTATE 680 30
WATERFRONT ROAD
UNION PACIFIC RAILROAD
LIMIT OF DETAILED STUDY
20 20
PAYTON SLOUGH
FLOOD PROFILES
10 10
CULVERT CULVERT
0 0
ELEVATION IN FEET (NAVD 88)
-10 -10
G
-20 -20 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD -30 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D E F CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA -40 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SUISAN BAY 128P 120 120 THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
110 110
B.A.R.T.
LANE DRIVE
PRIVATE BRIDGE PRIVATE BRIDGE PRIVATE BRIDGE PRIVATE BRIDGE PRIVATE BRIDGE
SAN MIGUEL ROAD
100 TREAT BOULEVARD 100
CULVERT 90 90
PINE CREEK
FLOOD PROFILES
CULVERT 80 80
CONTAINED IN CHANNEL
DOWNSTEAM OF THIS POINT ZONE A
70 70
ELEVATION IN FEET (NAVD 88)
60 60
50 50 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 40 10% ANNUAL CHANCE FLOOD
LIMIT OF DETAILED STUDY
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION 30 CONTRA COSTA COUNTY, CA 8400 8800 9200 9600 10000 10400 10800 11200 11600 12000 12400 12800 13200 13600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH GALINDO CREEK 129P 150 150
140 140
130 CONFLUENCE WITH 130
CONTRA COSTA CANAL
120 120
PINE CREEK
FLOOD PROFILES
110 110
100 100
ELEVATION IN FEET (NAVD 88)
90 90
80 80 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 70 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 60 13600 14000 14400 14800 15200 15600 16000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH GALINDO CREEK 130P 180 180 BASE FLOOD CONTAINED IN CHANNEL
170 170
160 160
150 150
PINE CREEK
YGNACIO VALLEY ROAD
FLOOD PROFILES
PRADA DRIVE (NORTH CROSSING) PRADA DRIVE (SOUTH CROSSING)
140 140
130 130
ELEVATION IN FEET (NAVD 88)
120 120
110 110 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 100 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 90 15600 16000 16400 16800 17200 17600 18000 18400 18800 19200 19600 20000 20400 20800
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFULENCE WITH GALINDO CREEK 131P 210 210 BASE FLOOD CONTAINED IN CHANNEL
200 200
USER BRIDGE
DEERPARK DRIVE
ARBOLADO DRIVE 190 OAK GROVE ROAD 190
VALLEY VISTA ROAD
DIABLO SHADOW DRIVE
OAK GROVE ROAD (NORTH CROSSING) CULVERT
180 180
PINE CREEK
FLOOD PROFILES
170 170
160 160
ELEVATION IN FEET (NAVD 88)
150 150
C D E
140 140 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 130 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION 120 CONTRA COSTA COUNTY, CA 20800 21200 21600 22000 22400 22800 23200 23600 24000 24400 24800 25200 25600 26000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFULENCE WITH GALINDO CREEK 132P 240 240
230 230
220 NORTH GATE ROAD 220
LIMIT OF DETAILED STUDY
210 210
PINE CREEK
FLOOD PROFILES
200 200
190 190
ELEVATION IN FEET (NAVD 88)
180 180
170 170 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 160 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
F G H I J CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 150 26000 26400 26800 27200 27600 28000 28400 28800 29200 29600 30000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFULENCE WITH GALINDO CREEK 133P ELEVATION IN FEET (NAVD 88) COASTAL FLOOD EFFECTS FROM SAN PABLO BAY FOR STILLWATER ELEVATIONS ELEVATIONS AND COASTAL TRANSECT DATA TABLE SEE FLOOD INSURANCE RATE MAP FOR BASE STREAM DISTANCE IN FEET ABOVE MOUTH
RAILROAD LEGEND CROSS SECTION LOCATION STREAM BED 10% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 0.2% ANNUAL CHANCE FLOOD
134P FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES CONTRA COSTA COUNTY, CA AND INCORPORATED AREAS PINOLE CREEK 70 70
60 60
50 TENNENT AVENUE 50
SAN PABLO AVENUE
40 40
PINOLE CREEK
FLOOD PROFILES
30 30
20 20
ELEVATION IN FEET (NAVD 88)
10 10
O P
0 0 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD -10 10% ANNUAL CHANCE FLOOD L
STREAM BED AND INCORPORATED AREAS
H I J K M N CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA -20 4400 4600 4800 5000 5200 5400 5600 5800 6000 6200 6400 6600 6800 7000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 135P 90 90
80 80
70 70
CULVERT
60 60
PINOLE CREEK
FLOOD PROFILES
50 50
40 40
ELEVATION IN FEET (NAVD 88)
30 30
V
HIGHWAY 80
INTERSTATE 20 20 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
Q R S T U CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 0 7000 7200 7400 7600 7800 8000 8200 8400 8600 8800 9000 9200 9400 9600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 136P 100 100
90 90
80 RAMONA COURT 80
PINOLE VALLEY ROAD
70 70
PINOLE CREEK
FLOOD PROFILES
60 60
50 50
ELEVATION IN FEET (NAVD 88)
40 40
AC
30 30 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 20 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
W X Y Z AA AB CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 10 9600 9800 10000 10200 10400 10600 10800 11000 11200 11400 11600 11800 12000 12200
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 137P 110 110
100 100
90 SIMAS AVENUE 90
80 80
PINOLE CREEK
FLOOD PROFILES
70 70
60 60
ELEVATION IN FEET (NAVD 88)
50 50
AG
40 40 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 30 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
AD AE AF CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 20 12200 12400 12600 12800 13000 13200 13400 13600 13800 14000 14200 14400 14600 14800
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 138P 130 130
120 120
110 110
100 100
PINOLE CREEK
FLOOD PROFILES
90 90
80 80
ELEVATION IN FEET (NAVD 88)
70 70
AL
60 60 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 50 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
AH AI AJ AK CROSS SECTION LOCATION 40 CONTRA COSTA COUNTY, CA 14800 15000 15200 15400 15600 15800 16000 16200 16400 16600 16800 17000 17200 17400
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 139P 150 150
140 140
130 130
PINOLE VALLEY ROAD
120 120
PINOLE CREEK
FLOOD PROFILES
110 110
100 100
ELEVATION IN FEET (NAVD 88)
90 90
80 80 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 70 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
AM AN CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 60 17400 17600 17800 18000 18200 18400 18600 18800 19000 19200 19400 19600 19800 20000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 140P 180 180
170 170
160 160
PINOLE VALLEY ROAD
LIMIT OF DETAILED STUDY
150 150
PINOLE CREEK
FLOOD PROFILES
140 140
130 130
ELEVATION IN FEET (NAVD 88)
120 120
AQ
110 110 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 100 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
AO AP CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 90 20000 20200 20400 20600 20800 21000 21200 21400 21600 21800 22000 22200 22400 22600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 141P
90 90
80 80
ROAD
70 70
SAN PABLO AVENUE
SYCAMORE AVENUE
CONFLUENCE WITH EAST BRANCH REFUGIO CREEK
INTERSTATE HIGHWAY 80
60 60
REFUGIO CREEK
FLOOD PROFILES
CULVERT RUNS BENEATH SYCAMORE AVENUE 50 50
CULVERT 40 40
ELEVATION IN FEET (NAVD 88)
30 30
0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY 20 20 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 2% ANNUAL CHANCE FLOOD 10 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARTELY 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
J CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 0 5200 5600 6000 6400 6800 7200 7600 8000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 143P 120 120 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE
1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
110 110
WADI RUN 100 100
REFUGIO VALLEY ROAD REFUGIO VALLEY ROAD REFUGIO VALLEY ROAD
90 90
REFUGIO CREEK
FLOOD PROFILES
80 80
70 70
ELEVATION IN FEET (NAVD 88)
60 60
O P
50 50 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 40 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
K L M N CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 30 7800 8200 8600 9000 9400 9800 10200 10600 11000 11400 11800 12200 12600 13000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 144P 160 160
2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY 150 150
140 140
130 130
REFUGIO CREEK
FLOOD PROFILES
120 120
110 110
ELEVATION IN FEET (NAVD 88)
100 100
90 90 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 80 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
Q R S CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 70 13000 13400 13800 14200 14600 15000 15400 15800 16200 16600 17000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 145P 220 220
210 210
ACCESS ROAD 200 REDWOOD ROAD 200
190 190
REFUGIO CREEK
FLOOD PROFILES
180 180
170 170
ELEVATION IN FEET (NAVD 88)
160 160
150 150
LIMIT OF DETAILED STUDY LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 140 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
T U CROSS SECTION LOCATION 130 CONTRA COSTA COUNTY, CA 17000 17400 17800 18200 18600 19000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 146P 320 320 0.2%, 2% AND 10% ANNUAL CHANCE FLOODS ELEVATION DATA NOT AVAILABLE
300 300
CONDIT ROAD
280 CONFLUENCE WITH 280
LAS TRAMPAS CREEK
260 260
RELIEZ CREEK
FLOOD PROFILES
240 240 1% ANNUAL CHANCE BACKWATER FROM LAS TRAMPAS CREEK CULVERT
220 220
ELEVATION IN FEET (NAVD 88)
200 200
180 180 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 160 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 140 0 400 800 1200 1600 2000 2400 2800 3200 3600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK 147P 320 320
310 310 CULVERT CULVERT
PRIVATE BRIDGE
300 OLD TUNNEL ROAD 300
290 290
RELIEZ CREEK
FLOOD PROFILES
280 280
270 PRIVATE BRIDGE 270
ELEVATION IN FEET (NAVD 88)
260 260
250 250 CAMINO DIABLO ROAD LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD
HIGHWAY 24 2% ANNUAL CHANCE FLOOD 240 M 10% ANNUAL CHANCE FLOOD L
STREAM BED AND INCORPORATED AREAS
D E F G H I J K CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 230 3400 3800 4200 4600 5000 5400 5800 6200 6600 7000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK 148P 370 370 THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
360 360
STANLEY BLVD 350 PRIVATE BRIDGE 350
340 340
RELIEZ CREEK
FLOOD PROFILES
330 330
320 320 CULVERT
ELEVATION IN FEET (NAVD 88)
PARK LANE
QUANDT ROAD 310 PRIVATE BRIDGE 310
300 300 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 290 10% ANNUAL CHANCE FLOOD V
STREAM BED AND INCORPORATED AREAS
N O P Q R S T U CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 280 7000 7400 7800 8200 8600 9000 9400 9800 10200 10600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK 149P 430 430 THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
420 420
410 410
PLEASANT HILL ROAD
400 400
RELIEZ CREEK
FLOOD PROFILES
390 390
380 380
ELEVATION IN FEET (NAVD 88)
370 370
360 360 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 350 10% ANNUAL CHANCE FLOOD W
STREAM BED AND INCORPORATED AREAS
X Y CROSS SECTION LOCATION 340 CONTRA COSTA COUNTY, CA 10600 11000 11400 11800 12200 12600 13000 13400
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK 150P 480 480
470 470
460 BLACKHAWK ROAD 460
450 450
RELIEZ CREEK
FLOOD PROFILES
440 440
CULVERT 430 430
ELEVATION IN FEET (NAVD 88)
420 420
410 410 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 400 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
Z AA CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 390 13400 13800 14200 14600 15000 15400 15800
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK 151P 530 530
520 520
510 510
BRANCH RELIEZ CREEK
CONFLUENCE WITH NORTH
500 500
RELIEZ CREEK
FLOOD PROFILES
490 490
480 480
ELEVATION IN FEET (NAVD 88)
470 470
460 460 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 450 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
AB AC CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 440 15800 16200 16600 17000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK 152P 590 590
580 580
570 570
LIMIT OF DETAILED STUDY
560 560
RELIEZ CREEK
FLOOD PROFILES
550 550
540 540
ELEVATION IN FEET (NAVD 88)
530 530
520 520 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 510 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION 500 CONTRA COSTA COUNTY, CA 17000 17400 17800 18200
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK 153P 55 55
50 50
GIANT ROAD
FOOTBRIDGE
11TH STREET 45 12TH STREET 45
LIMIT OF DETAILED STUDY
40 40
RHEEM CREEK
FLOOD PROFILES
35 35
CULVERT 30 30
ELEVATION IN FEET (NAVD 88) CULVERT CULVERT 25 25
CULVERT
20 20 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 15 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 10 3800 4000 4200 4400 4600 4800 5000 5200 5400
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH *DATA NOT AVAILABLE 154P
140 140
THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
130 130
FAIRVIEW AVENUE 120 DROP STRUCTURE 120
MINNESOTA AVENUE
CONFLUENCE WITH MARSH CREEK
110 110
SAND CREEK
FLOOD PROFILES
100 100
90 90
ELEVATION IN FEET (NAVD 88) CULVERT
80 80
70 70 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 60 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION 50 CONTRA COSTA COUNTY, CA 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MARSH CREEK 156P 170 170
160 160
PRIVATE DRIVE
ROUTE 4 BYPASS 150 DROP STRUCTURE 150
140 140
SAND CREEK
FLOOD PROFILES
130 130
120 120
ELEVATION IN FEET (NAVD 88)
110 110
100 100 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 90 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 80 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MARSH CREEK 157P 200 200
190 190
180 180
LIMIT OF DETAILED STUDY
170 170
SAND CREEK
FLOOD PROFILES
160 160
150 150
ELEVATION IN FEET (NAVD 88)
140 140
130 130 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 120 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION 110 CONTRA COSTA COUNTY, CA 13000 13500 14000 14500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MARSH CREEK 158P 70 70 FLOODING CONTAINED IN CHANNEL
60 60
GIANT ROAD 50 50
RUMRILL BOULEVARD
40 40
SAN PABLO CREEK
FLOOD PROFILES
30 30
20 20
SAN PABLO AVENUE
ELEVATION IN FEET (NAVD 88)
10 10
K L M
0 0 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD -10 10% ANNUAL CHANCE FLOOD E
STREAM BED AND INCORPORATED AREAS
A B C D F G H I J CROSS SECTION LOCATION -20 CONTRA COSTA COUNTY, CA 10000 10500 11000 11500 12000 12500 13000 13500 14000 14500 15000 15500 16000 16500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY 159P 90 90 FLOODING CONTAINED IN CHANNEL
80 80
70 CHURCH LANE 70
60 60
SAN PABLO CREEK
FLOOD PROFILES
50 50
40 40
ELEVATION IN FEET (NAVD 88)
30 30
20 20 LEGEND
LIMIT OF DETAILED STUDY 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
N O CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 0 16500 17000 17500 18000 18500 19000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY 160P 400 400
390 390
380 MANZANITA DRIVE 380
LIMIT OF DETAILED STUDY
EB MUD EROSION CONTROL DAM
370 370
SAN PABLO CREEK
FLOOD PROFILES
360 CONFLUENCE WITH 360
LAUTERWASSER CREEK
350 350
ELEVATION IN FEET (NAVD 88)
340 340
U V
330 330 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 320 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
P Q R S T CROSS SECTION LOCATION 310 CONTRA COSTA COUNTY, CA 72000 72500 73000 73500 74000 74500 75000 75500 76000 76500 77000 77500 78000 78500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY 161P 460 460 0.2%, 2% AND 10% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE
450 450
MINER ROAD
ORINDA WAY
AVE DE ORINDA 440 DIVERGENCE OF 440
CAMINO SOBRANTE
ORINDA VILLAGE OVERFLOW
CONFLUENCE WITH CASCADE CREEK
CONVERGENCE OF ORINDA VILLAGE OVERFLOW 430 430
CULVERT SAN PABLO CREEK
FLOOD PROFILES
420 420 CULVERT
CULVERT 410 410
ELEVATION IN FEET (NAVD 88)
400 400
390 390 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 380 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
W X Y Z AA CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 370 78500 79000 79500 80000 80500 81000 81500 82000 82500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY 162P 510 510 0.2%, 2% AND 10% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE
500 500
OFF RAMP
HIGHWAY 24
HIGHWAY 24
490 ALTARINDA DRIVE 490
BROOKWOOD DRIVE
BAY AREA RAPID TRANSIT
CONFLUENCE OF OVERHILL CREEK
CAMINO ENCINAS NORTH CROSSING
480 480 CULVERT CULVERT
SAN PABLO CREEK CULVERT FLOOD PROFILES
470 470
460 460
ELEVATION IN FEET (NAVD 88)
450 450
440 440 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 430 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
AB AC AD CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 420 82500 83000 83500 84000 84500 85000 85500 86000 86500 87000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY 163P 560 560 0.2%, 2% AND 10% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE
550 550
CULVERT
MORAGA WAY
CONFLUENCE OF
CAMINO ENCINAS
BROOKSIDE ROAD 540 SOUTH CROSSING 540
BROOKSIDE ROAD TRIBUTARY
CULVERT 530 530
SAN PABLO CREEK
FLOOD PROFILES
520 520
510 510
VISTA DEL MORAGA
ELEVATION IN FEET (NAVD 88) CULVERT
500 500
CULVERT 490 490 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 480 10% ANNUAL CHANCE FLOOD AJ AN
STREAM BED AND INCORPORATED AREAS
AE AF AG AH AI AK AL AM AO AP AQ CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 470 87000 87500 88000 88500 89000 89500 90000 90500 91000 91500 92000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY 164P 720 720
700 700
CULVERT
LAURA WAY
PRIVATE DRIVE
PRIVATE DRIVE
YARD CULVERT YARD CULVERT 680 ORCHARD ROAD 680
ABANDONED BRIDGE
GLORIETTA BOULEVARD
CULVERT CULVERT 660 660 CULVERT
SAN PABLO CREEK
FLOOD PROFILES
CULVERT 640 640
RHEEM BOULEVARD
CULVERT 620 620
ELEVATION IN FEET (NAVD 88) CULVERT
600 600
BK BM
BI BJ BL BN
580 580 LEGEND AR AS 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 560 10% ANNUAL CHANCE FLOOD* BD CULVERT STREAM BED AND INCORPORATED AREAS AT AU AV AW AX AY AZ BA BB BC BE BF BG BH CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 540 92000 92500 93000 93500 94000 94500 95000 95500 96000 96500 97000 97500 98000 98500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY * DATA NOT AVAILABLE 165P 840 840
820 820
800 YARD CULVERT 800
LIMIT OF DETAILED STUDY
780 780
SAN PABLO CREEK
FLOOD PROFILES
760 760
740 740
ELEVATION IN FEET (NAVD 88) CULVERT
720 720
CULVERT
700 700 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 680 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
BO BP BQ BR CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 660 98500 99000 99500 100000 100500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN PABLO BAY * DATA NOT AVAILABLE 166P 240 240 0.2%, 2% AND 10% ANNUAL CHANCE FLOOD DATA NOT AVAILABLE
230 230
220 RUDGEAR ROAD 220
SINGING HILL ROAD
LOS RANCHITOS BRIDGE
BROOKDALE AVENUE BRIDGE
210 210
SAN RAMON CREEK
FLOOD PROFILES
200 200
190 190
ELEVATION IN FEET (NAVD 88)
180 180
170 170 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 160 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 150 8000 8300 8600 8900 9200 9500 9800 10100 10400 10700 11000 11300 11600 11900
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WALNUT CREEK 167P 260 260
250 250
240 240
STONECASTLE COURT
230 230
SAN RAMON CREEK
FLOOD PROFILES
220 220
210 210
ELEVATION IN FEET (NAVD 88)
200 200
G
190 190 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 180 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
E F CROSS SECTION LOCATION 170 CONTRA COSTA COUNTY, CA 11900 12200 12500 12800 13100 13400 13700 14000 14300 14600 14900 15200 15500 15800
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WALNUT CREEK * DATA NOT AVAILABLE 168P 290 290
280 280
DROP STRUCTURE 270 W. LIVORNIA ROAD 270
260 260
SAN RAMON CREEK
FLOOD PROFILES
250 250
240 240
ELEVATION IN FEET (NAVD 88)
230 230
K
220 220 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 210 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
H I J CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 200 15800 16100 16400 16700 17000 17300 17600 17900 18200 18500 18800 19100 19400 19700
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WALNUT CREEK * DATA NOT AVAILABLE 169P 310 310
300 300
ALAMO SQUARE
290 DROP STRUCTURE 290
STONE VALLEY ROAD
DROP STRUCTURE NO. 4
LIMIT OF DETAILED STUDY
280 280
SAN RAMON CREEK
FLOOD PROFILES
270 270
260 260
ELEVATION IN FEET (NAVD 88)
250 250
240 240 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 230 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
L M N CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 220 19700 20000 20300 20600 20900 21200 21500 21800 22100 22400
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WALNUT CREEK * DATA NOT AVAILABLE 170P 600 600
580 580
560 560
SANRAMON VALLEY BLVD
LIMITOF DETAILED STUDY
540 540
SANRAMON CREEK
FLOOD PROFILES
520 520
500 500
ELEVATION IN FEET (NAVD 88)
CULVERT 480 480
460 460 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 440 10% ANNUAL CHANCE FLOOD*
STREAM BED INCORPORATED AREASAND
O P Q CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 420 58600 58900 59200 59500 59800 60100 60400 60700
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE THE CONFLUENCE WITH WALNUT CREEK * DATA NOT AVAILABLE 171P 230 230 1% ANNUAL CHANCE BACKWATER FROM SAN RAMON CREEK
220 220
MILTON AVENUE
CONFLUENCE WITH 210 SAN RAMON CREEK 210
VANDERSLICE AVENUE THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY THE 0.2% AND 2% ANNUAL CHANCE FLOOD PROFILES ARE 200 THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL TOO CLOSE TO THE 1% ANNUAL CHANCE 200 CHANCE ELEVATION TO BE SHOWN SEPARATELY ELEVATION TO BE SHOWN SEPARATELY
THE 0.2% AND 2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE FLOOD PROFILES 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY SANS CRAINTE CREEK
190 190 CULVERT
CULVERT 180 180
ELEVATION IN FEET (NAVD 88)
170 170
0.2% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE
160 160 LEGEND 0.2% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 150 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
A B C CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 140 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK *DATA NOT AVAILABLE 172P 260 260 THE 2% AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE THE 2% AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 250 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY 250
240 SAN MIGUEL DRIVE 240
MILTON AVENUE BRIDGE 0.2% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE
230 230
FLOOD PROFILES
SANS CRAINTE CREEK
220 220
CULVERT
210 210
ELEVATION IN FEET (NAVD 88) CULVERT
200 200
190 190 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 180 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
D E CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 170 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK *DATA NOT AVAILABLE 173P 290 290 THE 2% AND 0.2% ANNUAL CHANCE FLOODS PROFILES THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE ARE TOO CLOSE TO THE 1% ANNUAL TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY TO THE 1% ANNUAL CHANCE ELEVATION ELEVATION TO BE SHOWN SEPARATELY TO BE SHOWN SEPARATELY 280 280 THE 2% AND 0.2% ANNUAL CHANCE FLOODS PROFILES ARE TOO CLOSE TO THE 1% ANNUAL ELEVATION TO BE SHOWN SEPARATELY
PALMER ROAD
270 ROSEWOOD COURT 270
0.2% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE 0.2% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE
260 260
FLOOD PROFILES
SANS CRAINTE CREEK
250 250 CULVERT
240 240 CULVERT
ELEVATION IN FEET (NAVD 88)
230 230
220 220 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 210 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
F G H CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 200 5000 5200 5400 5600 5800 6000 6200 6400 6600 6800 7000 7200 7400 7600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK *DATA NOT AVAILABLE 174P 320 320 THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
310 310
300 300
LIMIT OF DETAILED STUDY
290 290
FLOOD PROFILES
SANS CRAINTE CREEK
280 280
270 270
ELEVATION IN FEET (NAVD 88)
260 260
250 250 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 240 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
I J CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 230 7600 7800 8000 8200 8400 8600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK *DATA NOT AVAILABLE 175P 290 290
280 280
LAUREL DRIVE
ROSEWOOD DRIVE
270 HAZELWOOD DRIVE 270
CONFLUENCE WITH SAN CRAINTE CREEK
260 260
FLOOD PROFILES
SANS CRAINTE TRIBUTARY A 250 250
240 240
ELEVATION IN FEET (NAVD 88)
230 230
220 220
LIMIT OF DETAILED STUDY LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 210 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
A B C CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 200 0 200 400 600 800 1000 1200 1400 1600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SANS CRAINTE CREEK * DATA NOT AVAILABLE 176P ELEVATION IN FEET (NAVD 88) THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPERATELY 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPERATELY THE 0.2% AND 2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO CULVERT
ROAD RAILROAD RAILROAD
RAILROAD THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPERATELY CULVERT
RAILROAD STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SUISUN BAY CULVERT
PORT CHICAGO HIGHWAY
SKIPPER ROAD
LIMIT OF STUDY LEGEND CROSS SECTION LOCATION STREAM BED 10% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 0.2% ANNUAL CHANCE FLOOD
177P FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES CONTRA COSTA COUNTY, CA AND INCORPORATED AREAS SHORE ACRES CREEK 520 520 1% ANNUAL CHANCE BACKWATER FROM MORAGA CREEK
510 510
500 500
CONFLUENCE WITH MORAGA CREEK
490 490
FLOOD PROFILES
480 480 SOUTH BRANCH MORAGA CREEK
470 470
ELEVATION IN FEET (NAVD 88)
460 460
450 450 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 440 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D CROSS SECTION LOCATION 430 CONTRA COSTA COUNTY, CA 0 400 800 1200 1600 2000 2400 2800 3200
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MORAGA CREEK 178P179P 580 580
570 570
THARP DRIVE 560 560
550 550
FLOOD PROFILES
540 540 SOUTH BRANCH MORAGA CREEK
530 530
ELEVATION IN FEET (NAVD 88)
CULVERT 520 520
510 510 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 500 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
E F G H CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 490 3200 3600 4000 4400 4800
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MORAGA CREEK 179P180P 600 600
590 590
580 580
CAMINO PABLO ROAD
570 570
LIMIT OF DETAILED STUDY
FLOOD PROFILES
560 560 SOUTH BRANCH MORAGA CREEK
CULVERT
550 550
ELEVATION IN FEET (NAVD 88)
540 540
530 530 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 520 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
I J K L M N O CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 510 4800 5200 5600 6000 6400 6800 7200 7600 8000 8400 8800
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MORAGA CREEK 180P181P 420 420
410 410
PG&E ROAD
400 PINE VALLEY ROAD 400
ALCOSTA BOULEVARD
(OVERBANK FLOODING)
CONFLUENCE WITH SAN RAMON CREEK
BEGIN DESIGN FLOOD CONTROL CHANNEL
390 390
FLOOD PROFILES
CULVERT CULVERT SOUTH SAN RAMON CREEK 380 380
LIMIT OF DETAILED STUDY
370 370
ELEVATION IN FEET (NAVD 88)
360 360
CULVERT
J K L M
350 350 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 340 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D E F G H I CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 330 -500 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE ALCOSTA BOULEVARD 181P182P 440 440
430 430
420 420
MONTEVIDEO ROAD
LIMIT OF DETAILED STUDY
CONFLUENCE WITH CHANNEL 2
CONFLUENCE WITH NORRIS CREEK CULVERT 410 410
FLOOD PROFILES
SOUTH SAN RAMON CREEK
400 400
390 390
ELEVATION IN FEET (NAVD 88)
380 380
370 370 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 360 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
N O P Q R S T CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 350 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE ALCOSTA BOULEVARD 182P183P 420 420
410 410
PG&E ROAD
PEBBLE PLACE
PEBBLE PLACE
400 PINE VALLEY ROAD 400
THUNDERBIRD PLACE
DIVERGENCE FROM SOUTH
SAN RAMON CREEK (EAST BANK)
390 CONFLUENCE WITH SOUTH SAN RAMON CREEK 390 PROFILE BASE LINE
FLOOD PROFILES
380 380
SOUTH SAN RAMON CREEK (OVERBANK FLOODING)
370 370
ELEVATION IN FEET (NAVD 88)
360 360
L
350 350 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 340 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D E F G H I J K CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 330 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUTH SAN RAMON CREEK 183P184P 550 550
1% ANNUAL CHANCE BACKWATER FROM LAGUNA CREEK
540 540
530 MORAGA ROAD 530
CONFLUENCE WITH LAGUNA CREEK
520 520
FLOOD PROFILES
CULVERT
ST. MARYS ROAD TRIBUTARY 510 510
500 500
ELEVATION IN FEET (NAVD 88)
490 490
480 480 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 470 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 460 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAGUNA CREEK 184P185P 590 590
580 580
570 570
LIMIT OF DETAILED STUDY
560 560
FLOOD PROFILES
ST. MARYS ROAD TRIBUTARY 550 550
540 540
ELEVATION IN FEET (NAVD 88)
530 530
520 520 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 510 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
D E CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 500 2600 2800 3000 3200 3400 3600
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAGUNA CREEK 185P186P 380 380 THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY
THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE THE 2% - AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO FLOW CONTAINED IN CULVERT 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY 360 360
CULVERT CULVERT
BRIDGE
BRIDGE
AUSTIN LANE
NORTH BRANCH
ANGELA AVENUE
MIRANDA AVENUE
RANCH DRIVEWAY
DRIVEWAY BRIDGE
CONFLUENCE WITH
340 SCHOOL DRIVEWAY 340
STONE VALLEY CREEK CULVERT
DROP STRUCTURE NO. 1
INTERSTATE HIGHWAY 680 INLET
CULVERT 320 320
FLOOD PROFILES
STONE VALLEY CREEK
300 300
VALLEY OAKS DRIVE
STONE VALLEY ROAD
DROP STRUCTURE NO. 2
LIMIT OF DETAILED STUDY
280 280
LIMIT OF DETAILED STUDY CULVERT
ELEVATION IN FEET (NAVD 88)
260 260
J K
240 240 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 220 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D E F G H I CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 200 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK 186P187P 480 480 0.2%, 2%, AND 10% CHANCE FLOODS ELEVATION DATA NOT AVAILABLE
470 470
DROP NO. 1 460 460
DOWNSTREAM OF THIS POINT
ZONE A CONTAINED IN CHANNEL
450 450
SYCAMORE CREEK
FLOOD PROFILES
440 440
LIMIT OF DETAILED STUDY
430 430
ELEVATION IN FEET (NAVD 88)
420 420
410 410 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 400 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C CROSS SECTION LOCATION 390 CONTRA COSTA COUNTY, CA 4200 4400 4600 4800 5000 5200 5400 5600 5800 6000 6200 6400 6600 6800
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK 187P188P 500 500 0.2%, 2% AND 10% ANNUAL CHANCE FLOODS ELEVATION DATA NOT AVAILABLE
490 490
DROP NO. 2 DROP NO. 3 DROP NO. 4
DROP NO. 5 480 480
CAMINO TASSAJARA
CAMINO TASSAJARA
LIMIT OF DETAILED STUDY
470 470
SYCAMORE CREEK
FLOOD PROFILES
460 460
450 450
ELEVATION IN FEET (NAVD 88)
440 440
UPSTREAM OF THIS POINT
ZONE A CONTAINED IN CHANNEL
430 430 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 420 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
D E F CROSS SECTION LOCATION 410 CONTRA COSTA COUNTY, CA 6800 7000 7200 7400 7600 7800 8000 8200 8400 8600 8800 9000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK 188P189P 220 220
210 210
MEADOW LANE
ORCHARD LANE
200 CASTLE HILL ROAD 200
190 190
TICE CREEK
FLOOD PROFILES
180 180
170 170
ELEVATION IN FEET (NAVD 88)
160 160
150 150 LEGEND 0.2% ANNUAL CHANCE FLOOD * 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD * 140 10% ANNUAL CHANCE FLOOD *
STREAM BED AND INCORPORATED AREAS
A B C D E CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 130 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK * DATA NOT AVAILABLE 189P190P 250 250
240 240
COVENTRY COURT
230 MONTICELLO DRIVE 230
CASTLE GLENN ROAD
TICE VALLEY BOULEVARD TICE VALLEY BOULEVARD
LIMIT OF DETAILED STUDY
220 220
TICE CREEK
FLOOD PROFILES
210 210
200 200
ELEVATION IN FEET (NAVD 88)
190 190
180 180 LEGEND 0.2% ANNUAL CHANCE FLOOD * 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD * 170 10% ANNUAL CHANCE FLOOD *
STREAM BED AND INCORPORATED AREAS
F G H I CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 160 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAS TRAMPAS CREEK * DATA NOT AVAILABLE 190P191P 220 220
210 210
200 LANCASTER ROAD LANCASTER ROAD 200
DIVERGENCE WITH TICE CREEK
CONVERGENCE WITH TICE CREEK
190 190
FLOOD PROFILES
TICE CREEK OVERFLOW
180 180
170 170
ELEVATION IN FEET (NAVD 88)
160 160
150 150 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 140 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
A B C D CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 130 0 500 1000 1500 2000 2500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH TICE CREEK *DATA NOT AVAILABLE 191P192P 170 170
160 160
ARROYO WAY
CARMEL DRIVE
LINCOLN AVENUE
150 NORTH BROADWAY 150
AND SAN RAMON CREEK
EXIT CAPWELL'S CULVERT
LIMIT OF DETAILED STUDY
CONFLUENCE WITH LAS TRAMPAS CREEK
140 140
WALNUT CREEK
FLOOD PROFILES
130 130 1% ANNUAL CHANCE FLOOD CONTAINED IN CULVERT
120 120
ELEVATION IN FEET (NAVD 88)
110 110
100 100 LEGEND 0.2% ANNUAL CHANCE FLOOD* 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD* 90 10% ANNUAL CHANCE FLOOD*
STREAM BED AND INCORPORATED AREAS
A B C CROSS SECTION LOCATION 80 CONTRA COSTA COUNTY, CA 66000 66500 67000 67500 68000 68500 69000 69500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH PACHECO CREEK *DATA NOT AVAILABLE 192P193P 193P 194P 80 80
70 70
ON RAMP
DRIVEWAY
FITZUREN ROAD
STATE HIGHWAY 4 STATE HIGHWAY 4 60 SYCAMORE DRIVE 60
UNION PACIFIC RAILROAD
50 50
FLOOD PROFILES
WEST ANTIOCH CREEK
40 40 CULVERT CULVERT CULVERT 30 30
ELEVATION IN FEET (NAVD 88)
20 20
N O P
10 10 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 0 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
K L M CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA -10 7800 8100 8400 8700 9000 9300 9600 9900 10200 10500 10800 11100 11400 11700
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN JOAQUIN RIVER 195P196P 100 100
90 90
80 PUTNAM STREET 80
WEST ANTIOCH CREEK
CONFLUENCE WITH MIDDLE BRANCH
70 70
FLOOD PROFILES
WEST ANTIOCH CREEK
60 60
50 50
ELEVATION IN FEET (NAVD 88)
40 40
30 30 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 20 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
Q R S T U V W X Y CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 10 11700 12000 12300 12600 12900 13200 13500 13800 14100 14400 14700 15000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN JOAQUIN RIVER 196P197P 130 130 NO - 1% AND 0.2% - YEAR FLOW OVER CULVERT BREAKOUT FLOW ONLY
120 120
110 LONGVIEW ROAD 110
100 100
FLOOD PROFILES
WEST ANTIOCH CREEK
90 90
CULVERT
80 80
ELEVATION IN FEET (NAVD 88)
70 70
60 60 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 50 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
Z AA CROSS SECTION LOCATION 40 CONTRA COSTA COUNTY, CA 15000 15300 15600 15900 16200 16500 16800 17100 17400 17700 18000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN JOAQUIN RIVER 197P198P 170 170
160 160
150 PASO CORTO ROAD 150
140 140
FLOOD PROFILES CULVERT WEST ANTIOCH CREEK
130 130
120 120
ELEVATION IN FEET (NAVD 88)
110 110
100 100 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 90 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
AB AC CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 80 18000 18300 18600 18900 19200 19500 19800 20100 20400
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN JOAQUIN RIVER 198P199P 200 200
190 190 PIPE INLET
180 180
TOP OF PIPE
170 170
LIMIT OF DETAILED STUDY
FLOOD PROFILES
WEST ANTIOCH CREEK
160 160
CULVERT
150 150
ELEVATION IN FEET (NAVD 88) 0.2%, 2% AND 10% ANNUAL CHANCE FLOOD DATA NOT AVAILABLE
140 140
130 130 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 120 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION 110 CONTRA COSTA COUNTY, CA 20400 20700 21000 21300 21600 21900 22200 22500 22800 23100 23400 23700 24000 24300
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN JOAQUIN RIVER 199P200P 780 780 0.2% ANNUAL CHANCE FLOOD CONTAINED IN CHANNEL
0.2% ANNUAL CHANCE FLOOD CONTAINED IN CHANNEL
770 770
760 DROP STRUCTURE 760
LIMIT OF DETAILED STUDY
750 750
FLOOD PROFILES
WEST BRANCH ALAMO CREEK 740 740
730 730
ELEVATION IN FEET (NAVD 88)
720 720
A
710 710 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 700 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION 690 CONTRA COSTA COUNTY, CA 27500 27700 27900 28100 28300 28500 28700 28900 29100 29300 29500 29700 29900 30100
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK 200P201P 820 820 0.2% ANNUAL CHANCE FLOOD CONTAINED IN CHANNEL
0.2% ANNUAL CHANCE FLOOD CONTAINED IN CHANNEL CULVERT
810 810
800 800
GREEN MEADOW DRIVE 0.2%, 2% AND 10% ANNUAL CHANCE FLOOD DATA NOT AVAILABLE
790 790
FLOOD PROFILES
WEST BRANCH ALAMO CREEK 780 780 CULVERT
770 770
LIMIT OF DETAILED STUDY
BLACKHAWK MEADOW DRIVE
ELEVATION IN FEET (NAVD 88)
760 760
750 750 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 740 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
B CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 730 30100 30300 30500 30700 30900 31100 31300 31500 31700 31900 32100
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SAN RAMON CREEK 201P202P 202P 100 100 1% ANNUAL CHANCE FLOOD DISCHARGE CONTAINED IN CULVERT
90 90
SUNSET DRIVE 80 STATE HIGHWAY 4 80
EAST TREGALLAS ROAD
70 70
FLOOD PROFILES
CULVERT 60 60
WEST BRANCH EAST ANTIOCH CREEK
50 50
ELEVATION IN FEET (NAVD 88)
40 40
30 30 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 20 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
B CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 10 3900 4300 4700 5100 5500 5900 6300 6700 7100 7500 7900
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH EAST ANTIOCH CREEK 203P202P203P204P 160 160 1% ANNUAL CHANCE FLOOD DISCHARGE CONTAINED IN CULVERT
150 150
140 140
LIMIT OF DETAILED STUDY
130 130
FLOOD PROFILES
120 120
WEST BRANCH EAST ANTIOCH CREEK
110 110
ELEVATION IN FEET (NAVD 88)
100 100
90 90 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 80 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 70 7900 8300 8700 9100 9500 9900
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH EAST ANTIOCH CREEK 204P203P204P205P 100 100 10% AND 2% ANNUAL CHANCE FLOOD ELEVATION DATA NOT AVAILABLE
CULVERT
90 90
80 ACCESS ROAD 80
SANTA FE RAILWAY
SYCAMORE AVENUE
SAN PABLO AVENUE
BURLINGTON NORTHERN
CONFLUENCE WITH REFUGIO CREEK
70 70
FLOOD PROFILES
WEST BRANCH REFUGIO CREEK 60 60
CULVERT
50 50
ELEVATION IN FEET (NAVD 88)
CULVERT AMBER COURT 40 40
EASTSHORE FREEWAY
INTERSTATE 80 HIGHWAY G H
30 30 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 20 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
A B C D E F CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 10 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 3600 3900
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH REFUGIO CREEK 205P206P 150 150 FLOOD ELEVATION DATA NOT AVAILABLE THE 10%, 2%, AND 0.2% ANNUAL CHANCE FLOOD 140 PROFILES ARE TOO CLOSE 140 TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPERATELY
THE 10%, 2%, AND 0.2% 130 ANNUAL CHANCE FLOOD 130 10% AND 2% ANNUAL PROFILES ARE TOO CLOSE CHANCE FLOOD ELEVATION TO THE 1% ANNUAL CHANCE DATA NOT AVAILABLE ELEVATION TO BE SHOWN SEPERATELY
120 120 FLOOD PROFILES
110 110 WEST BRANCH REFUGIO CREEK
100 100 ELEVATION IN FEET (NAVD 88) IN FEET (NAVD ELEVATION
90 90
L
80 80 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD
70 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED AND INCORPORATED AREAS I CROSS SECTION LOCATION FEDERAL EMERGENCY MANAGEMENT AGENCY 60 CONTRA COSTA COUNTY, CA 3900 4200 4500 4800 5100 5400 5700 6000 6300 6600 6900 7200 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH REFUGIO CREEK 206P 230 230
THE 10%, 2%, AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPERATELY
220 220
210 210
200 200
FLOOD PROFILES
WEST BRANCH REFUGIO CREEK 190 190
180 180
ELEVATION IN FEET (NAVD 88)
170 170
160 160 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 150 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
M CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 140 7200 7500 7800 8100 8400 8700
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH REFUGIO CREEK 207P208P 280 280
THE 10%, 2%, AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPERATELY
270 270
260 260
LIMIT OF DETAILED STUDY
250 250
FLOOD PROFILES
WEST BRANCH REFUGIO CREEK 240 240
230 230
ELEVATION IN FEET (NAVD 88)
220 220
210 210 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 200 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
N O CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 190 8700 9000 9300
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH REFUGIO CREEK 208P209P 30 30
25 25
CASTRO CREEK
20 CONFLUENCE WITH 20
MOUTH OF WILDCAT CREEK
15 15
WILDCAT CREEK
FLOOD PROFILES
10 10
5 5
ELEVATION IN FEET (NAVD 88)
0 0
-5 -5 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD -10 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA -15 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 209P210P 55 55
50 50
45 OF THIS POINT 45
IN CHANNEL DOWNSTREAM
500 YEAR FLOODING CONTAINED
40 40
WILDCAT CREEK
FLOOD PROFILES
35 35
30 30
ELEVATION IN FEET (NAVD 88)
25 25
20 20 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 15 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 10 9300 9400 9500 9600 9700
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 210P211P 90 90
80 80
23RD STREET
70 VAN NESS STREET 70
RUMRILL BOULEVARD
DAVIS PARK CULVERT
DAVIS PARK FOOTBRIDGE
60 60 CULVERT
WILDCAT CREEK
FLOOD PROFILES
50 50
CULVERT
40 40 CULVERT
ELEVATION IN FEET (NAVD 88)
LAT. WEIR LAT. WEIR 30 CHURCH LANE 30
N O P Q
20 20 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10 10% ANNUAL CHANCE FLOOD D
STREAM BED AND INCORPORATED AREAS
A B C E F G H I J K L M CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 0 9500 10000 10500 11000 11500 12000 12500 13000 13500 14000 14500 15000 15500 16000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 211P212P 120 120
110 110
LAT. WEIR LAT. WEIR LAT. WEIR 100 100
LIMIT OF DETAILED STUDY
90 90
WILDCAT CREEK
FLOOD PROFILES
80 80
70 70
ELEVATION IN FEET (NAVD 88)
60 60
50 50 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 40 10% ANNUAL CHANCE FLOOD
STREAM BED AND INCORPORATED AREAS
R S T U V CROSS SECTION LOCATION
CONTRA COSTA COUNTY, CA 30 16000 16500 17000 17500 18000
FEDERAL EMERGENCY MANAGEMENT AGENCY STREAM DISTANCE IN FEET ABOVE MOUTH 212P213P 213P