PUBLIC SAFETY FLOOD CONTINGENCY N ' 121°39'W 121°38'30"W 121°38'W 121°37'30"W 121°37'W 121°36'30"W 121°36'W 121°35'30"W 121°35'W 121°34'30"W 121°34'W 121°33'30"W 121°33'W 2 N ' 121°39'W 121°38'30"W 121°38'W 121°37'30"W 121°37'W 121°36'30"W 121°36'W 121°35'30"W 121°35'W 121°34'30"W 121°34'W 121°33'30"W 121°33'W ° 2 8 ° N 3 ' 8 2 N 3 ' C ° 2 8 a C ° 3 n a 8 a Holland Tract n 3 l 1 a Holland Tract 8 l 1 0 8 + 0 R 0 RD 2025 + d Frank's Tract 0 R 0 RD 2025 d Frank's Tract 0 The symbology presented in the legend below is global to the The symbology presented in the legend below is global to the project area, some symbols may not be present on map project area, some symbols may not be present on map H5 d R d r R TRANSPORTATION TRANSPORTATION r e H3 e QUIMBY ISLAND p N i " Gate p 0 Gate N i " 3 P ' 0 0 1 0 + 3 P ° 0 ' 16 N " 8 1 RD 2090 ° 0 3 N ROADS " 8 3 ' 0 ROADS 3 1 3 ° 2 ' 8 1 1 ° 0 3 2 1 8 BETHEL SL + QUIMBY ISLAND 3 I AND 0 0 0 BETHEL ISLAND + 0 H 0 Major Local Trail, 150+0 Major Local Trail, 0 0 Interstate Highway Trail MUNICIPAL ID 2 RD 2090 Interstate Highway Trail 150+0 Road Road Major 2 o Road Road Major 2 0 MUNICIPAL ID 2 + 0 0 l + H2 0 0 H h l 0 H Gate a way Rd g Ga o a ylo r u te way Rd PS T n o FFM ylo r l R l Ta l FLOOD CONTINGENCY OPTIONS d d S 2 LEVEE INFORMATION Rd a 4 A FFM C N ' d 0 A D D 1 + 0 N 0 ' n u ° n 30+ Flood Contingency Special Flood 0 1 1000-Foot Levee Stationing 1 8 00 ° + 0 t N 0 3 2 3 u ' 300+00 290+00 1 8 d 1 5 N 3 2 Option Consideration o ' 0 ° PS 5 1 8 Levee Centerline + 0 C ° d M 3 R 0 + H3 8 d 3 Effluent p d 2 0 R 0 u e 6 2 0 00 Tide Gate Agricultural Return Effluent p t Pipeline Wi n e n 0 120+ e 6 H 0 ds w a + Pipeline i e 0 20+0 0 Drain/Siphon W nd + 1 o w S 2 0 s 0 7 l 2 0 Dutch Slough 0 l A Levee Access Point Levee Crossing S 7 + a Dutch Slough t o 0 LEEE INFORMATION S 0 n ne + t o 2 0 0+00 d 0 n 8 11 2 0 00 e 0 8 110+ 1000-Foot Levee Stationing 3 + 0 Historic Levee Breach R 300+00 290+00 0 0 d 3 + 0 0 0 0 + 2 0 0 Levee Centerline 0 9 T + 2 N R d 0 0 r " 0 9 0 N 0 + a 0 " 3 0 0 ' + Agricultural Return 0 00 Levee Erosion 0 Tide Gate 0 1 c + 0 3 0 ° ' + 0 N 0 00 " 8 0 1 t ° 0 3 0 N Drain/Siphon " 8 3 ' 0 3 0 3 ° ' 8 0 ° A Levee Crossing 3 Levee Access Point 3 8 1 Levee Seepage 3 0+00 31 0 R 0+ H6 H7 H10 H11 90+0 00 0 d 90+0 C O N TRA 3 C O N TRA 20+ 3 00 C O S TA 80+00 20+ H2 RESPONSE INFORMATION 00 C O S TA 80+00 RESPONSE INFORMATION C O U NTY T (type) C O U NTY T (type) T Structure [A - Agricultural; R - Residential; S - Seasonal; U - Unknown] [A - Agricultural; R - Residential; S - Seasonal; U - Unknown] # 70+00 T# Structure # (count) - [Approx. Structure Count] N ' PS 0 # (count) - [Approx. Structure Count] N 0 ' ° 0 + 0 8 30 0 3 ° 0 HOTCHKISS N 3 + ' 8 330 Boat Landing Command Post 0 N 3 ' ° 0 8 ° S A N 3 Boat Landing TRACT RD 799 8 S A N 3 60+00 Command Post J O A Q UIN 60+00 DP Supply Delivery Point HOLLAND TRACT J O A Q UIN Secondary Supply Delivery Point HOLLAND TRACT C O U NTY DP RD 2025 r C O U NTY Field Stockpile Pump Station 50+00 RD 2025 r e HOTCHKISS 50+00 Field Stockpile e v Pump Station v Flood Fight Material i FFM Livestock TRACT RD 799 Agricultural A 40+ Livestock i 360+00 00 R 40 N H1 + " Flood Fight Material H1 00 R 0 FFM N " 3 ' Helispot 0 9 3 H ' 5 N A " ° 9 0 7 5 N " ° 3 3 C y pr e ss R d ' 0 d 7 9 3 3 3 d U C y pr e ss ' 0 5 R d d + ° l Supply Staging 3 9 0 d R 7 U 0 0 5 S Supply Staging + ° 3 0 l R S d 0 7 O 3 n O d a n l A a s l A I s I 380+00 380+00 C REFERENCE INFORMATION n C REFERENCE INFORMATION o o o n n c Fire Station School o n c t a r +00 t a Ferry Communication Facility 0 B a 39 r +00 a 390 B N ' 9 C N ' H9 5 C Home Care Ag. Worker Camp 9 ° o 5 N 7 ' ° o 3 s Potable Water Facility Waster Water Facility 9 N 7 ' 5 s 3 t 9 a ° t 5 +00 7 400 a ° C 3 Ferry 400+00 H8 H9 7 a 00 Dam C 3 n 0+ a 0 NG a n 0+0 Solid Waste Facility Natural Gas Facility l a l H4 Hazardous Material 10+00 0 4 0 0 0 0 Hazardous Material 0 0 0 + 0+0 0 U + 0 0 S 57 UG UG Underground Power Line + +0 0 0 U + 4 A 0 S A 57 9 0 4 4 UG UG 4 9 Underground Power Line 4 Transmission Line 4 560+00 H8 560+00 N R o c k Transmission Line UG UG " S l ough Underground Gas Line R o c k 0 S l N ough " 3 0 ' 0 + 0 8 0 0 3 0 5 ' 5 N +0 " ° 0 0 8 500 0 7 5 County Boundary N UG UG Underground Gas Line 0 0 " ° 0 0 3 3 ' 0 7 8 0 0 + + 3 3 ' 5 PS ° 8 0 0 + + 7 5 ° 3 4 3 0 PS 0 7 5 5 3 4 3 County Boundary 5 VEALE TRACT 5 RD 2065 VEALE TRACT 0 1,100 2,200 4,400 N Feet RD 2065 0 1,100 2,200 4,400 N Feet Delta Rd Delta Rd PALM-ORWOOD RD 2024 Map projection and scale: Delta Rd Delta Rd PALM-ORWOOD RD 2024 NAD 1983 StatePlane California III FIPS 0403 Feet, 1:28,600 Siphon 14":147+29 Map projection and scale: PUBLIC SAFETY INFORMATION FLOOD CONTINGENCY PLANNING INFORMATION NAD 1983 StatePlane California III FIPS 0403 Feet, 1:28,600 121°39'W 121°38'30"W 121°38'W 121°37'30"W 121°37'W 121°36'30"W 121°36'W 121°35'30"W 121°35'W 121°34'30"W 121°34'W 121°33'30"W 121°33'W 121°39'W 121°38'30"W 121°38'W 121°37'30"W 121°37'W 121°36'30"W 121°36'W 121°35'30"W 121°35'W 121°34'30"W 121°34'W 121°33'30"W 121°33'W D Holland Tract - 51 Holland Tract - 53 A.1. MONITORING S B.1. STAGING AREAS C.1. COMMUNICATIONS SUPPORT A.1 SPECIAL FLOOD CONSIDERATIONS LOCAL TOPOGRAPHY C REPAIR CONTRACTORS & MATERIAL SUPPLIERS Critical gauges may be accessed on the internet at e following sites have been identied for use as staging areas for incoming resources. COUNTY OFFICES H1 - PUMP STATION 1 e general elevation ranges are shown by shading within the levee maintenance area below. General USGS Mobile Water Data areas of high ground and low ground can be derived from the mapping presented below. Large oods, m.waterdata.usgs.gov or water.weather.gov Located near station 19+00. Discharge pump may be used during a major flood event; however, additional pumps or a dam failure, could result in extreme ood depths. Flood depths may also be signicantly greater FLOOD FIGHT LABOR e QR codes presented at the right and below can be scanned FLOOD FIGHT STAGING CONTRA COSTA COUNTY SHERIFF'S CONTRA COSTA COUNTY FIRE PROTECTION would be required to dewater the island. in depressions such as channels or road cuts or next to obstructions such as railroad embankments. Flood depths may also be signicantly less, depending on individual variations in terrain or where on a mobile device with any QR code scanning application to The staging area will be located at the south end of Center Road near station 472+00 OFFICE/DEPARTMENT DISTRICT Labor Ready Sacramento Labor Ready Concord Labor Ready Oakland 37°58’38.69887440’’N, 121°36’08.57300040’’W structures are raised above general ground elevation.