Contra Costa County DRAFT - 2011 Supervisorial District - Concept 04

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Conoco -Philips Military Ocean 160 San Crockett }þ Port Terminal Complex Pablo Car it er Franks 80 Costa quinez Stra Riv Rodeo¦¨§ in Tract Bay u aq 680 Jo ¦¨§ Bay an Bethel Tesoro Clyde PITTSBURG S Point Island Bayview Shell Vine 5 Big Mt Hill 4 Break 4 View }þ Montalvin PINOLE }þ Manor HERCULES Former Keller }þ4 Concord Canyon Buchanan Naval Airport Landfill Tara El Weapons Hills MARTINEZ Pacheco Sobrante Station ANTIOCH OAKLEY West Co. Rollingwood Landfill Alhambra North }þ242 4 Richmond SAN Valley }þ Briones PABLO CONCORD Knightsen Chevron East Richmond Reliez PLEASANT Heights 1 80 Valley HILL CLAYTON RICHMOND ¦¨§ San ¦¨§580 EL Pablo Contra BRENTWOOD Reservoir Briones Costa CERRITO Reservoir Centre

Kensington Shell Acalanes North 4 Ridge Ridge Gate }þ LAFAYETTE WALNUT Discovery }þ24 CREEK Bay Saranap San 4 Miguel 4 Mt Diablo }þ Castle 3 Hill San Byron Francisco ORINDA ¦¨§680 Bay Alamo

MORAGA J4 Diablo 456 Clifton Court Canyon Forebay

Byron 2 DANVILLE Los Airport Vaqueros San Blackhawk Reservoir Leandro Reservoir Camino Current Supervisorial Boundaries Concept 04 Population Count Tassajara District Population Variance SAN RAMON 2 1 213,646 3 ,841 1 5 Norris 4 2 205,410 ( 4,395) Canyon Concept 04 Population Distribution Variance 3.00% 680 3 212,087 2 ,282 ¦¨§ 1.83% 1.09% 1.15% 3 2010 Population Variance 1.50% High: 1.83% 0.00% 4 205,666 ( 4,139) -2.09% -1.97% Total: 1,049,025 Low: -2.09% -1.50% -3.00% 5 212,216 2,411 Equal Distribution: 209,805 Spread: 3.92% District 1 District 2 District 3 District 4 District 5

Map Created for May 3, 2011 Board of Supervisors Meeting Miles Contra Costa County Department of Conservation & Development 651 Pine Street, 4th Floor - N. Wing, Martinez, CA 94553-0095 Prepared by the Department of Conservation and Development - GIS Group I 0 3 6 9 37:59:48.455N 122:06:35.384W Contra Costa County DRAFT - Boundary & Population Shift - Concept 04

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Conoco 160 -Philips Military Ocean }þ San Crockett Port Terminal Complex Pablo Car t er Franks 80 Costa quinez Strai iv Rodeo§ n R Tract ¦¨ i Bay u 680 aq 23,493 Jo ¦¨§ Bay n Bethel 74,475 Tesoro Clyde Sa 2 ► 1 Point PITTSBURG Island 2 ► 5 Shell Vine 5 Big Mt Hill 4 Break Bayview PINOLE }þ4 View }þ Montalvin Tara HERCULES Former Keller }þ4 Manor Hills Buchanan 53,117 Concord Canyon Naval Landfill El Airport 4 ► 5 MARTINEZ Pacheco Weapons Sobrante Station OAKLEY ANTIOCH West Co. Rollingwood Landfill Alhambra 242 North }þ 4 Richmond SAN Valley 141,522 }þ PABLO Briones 5 ► 3 Chevron East CONCORD Knightsen Richmond 14,976 Reliez PLEASANT Heights 1 80 2 ► 4 Valley HILL CLAYTON RICHMOND ¦¨§ San ¦¨§580 EL Pablo Contra BRENTWOOD Reservoir Briones Costa CERRITO Reservoir Centre

Kensington Shell San Acalanes North 4 Ridge 19 }þ Francisco LAFAYETTE Ridge Gate WALNUT 4 ► 3 Discovery Bay CREEK }þ24 Saranap Bay San 4 4 Miguel Mt Diablo }þ Current Supervisorial Boundaries Castle 56,092 3 2,607 Hill 3 ► 4 3 ► 2 680 Byron ORINDA ¦¨§ Alamo 53 2 3 ► 4 1 5 MORAGA J4 Diablo 456 Clifton 4 Court Canyon Forebay

Byron 3 2 Airport DANVILLE Los Vaqueros San Blackhawk Reservoir Leandro Reservoir 127,409 3 ► 2 Camino Concept 04 Summary of Boundary Shift Concept 04 Population Count Tassajara District Population Variance SAN RAMON 5 1 213,646 3 ,841 1 Norris 2 205,410 ( 4,395) Canyon Concept 04 Population Distribution Variance 4 3 3.00% 3 212,087 2 ,282 680 2010 Population ¦¨§ Variance 1.50% 1.83% 1.09% 1.15% 2 High: 1.83% 0.00% 4 205,666 ( 4,139) -2.09% -1.97% Total: 1,049,025 Low: -2.09% -1.50% -3.00% 5 212,216 2,411 Equal Distribution: 209,805 Spread: 3.92% District 1 District 2 District 3 District 4 District 5

Area added to District 1 Area added to District 3 Miles Map Created for May 3, 2011 Board of Supervisors Meeting Prepared by the Department of Contra Costa County Department of Conservation & Development Area added to District 5 651 Pine Street, 4th Floor - N. Wing, Martinez, CA 94553-0095 Area added to District 2 Area added to District 4 Conservation and Development - GIS Group I 0 3 6 9 37:59:48.455N 122:06:35.384W DRAFT - Analysis - 2011 Supervisorial District - Concept 04 Contra Costa County¨¦§780 Supervisorial Districts - Concept 04 City of Martinez Split Concept 04 Facility Analysis O = District same as 2000 X = District changed District 5: Most of County Facilities 1 2 3 4 5 Martinez, with the Airport 5 Buchanan Field ► X Current exception of the Byron Airport O 1 Hospital District 2 southern peninsula. Doctors Medical Center O Contra Costa Regional Medical Center ► X 4 3 Mt Health Center 680 Vine View ¨¦§ Hill North Richmond Center for Health O Richmond Health Center O MARTINEZ }þ4 Concord Public Health Clinic ► X 2 }þ4 Concord Health Center - Adult Medicine ► X Bay Point Health Center O A lh Pittsburg Health Center O a CONCORD m Pacheco Antioch Health Center X ◄ b Brentwood Health Center O ra Current A }þ242 Housing Authority v District 4 e North Richmond O City of Walnut Creek Split San Pablo O District 4: Follows Census Rodeo ► X Alhambra Martinez 1 ► X District 4: Mt Diablo and S}þa24n2 Ramon Valley Unified School Valley geography to form a rough Martinez 2 ► X Districts, Acalanes High School District east of I-680 Bay Point O boundary at the southern Pittsburg O Reliez Antioch 1 X ◄ PLEASANT Current CONCORD Valley peninsula of Martinez. Antioch 2 X ◄ HILL District 4 Oakley X ◄ Current Current Brentwood O ¦¨§680 Current Detention Center District 2 District 4 West County Detention Facility O District 3 City of Concord Split Martinez Detention Facility ► X Contra Juvenile Hall ► X Rd }þ4 Costa lley District 5: north of Marsh Creek Detention Facility O Va Orin Allen Rehab O Mt. Diablo USD Centre acio Ygn Concord Ave, north Acalanes HSD of Clayton Rd Industrial Facilities }þ4 Refinery Acalanes Shell North }þ242 Chevron O Ridge Gate Current Current Conoco-Philips ► X WALNUT M Shell ► X Ridge t. D District 4 CREEK ia ord CONCORD District 5 Tesoro ► X }þ24 Ac blo Conc al U Landfill an SD e es Av West Contra Costa Sanitary Landfill O LAFAYETTE HS Saranap D Cla Keller Canyon Landfill O San Miguel yt Transfer Facility on Rd West Co Integrated Resource Recovery Facility O A cala ACME Landfill ► X Castle nes H District 2: SD Contra Costa Transfer and Recovery ► X Hill Sa Acalanes n Ram Pittsburg Recycling Center and Transfer Station O on V Brentwood Transfer Station O alley High USD CLAYTON ¨¦§680 School Current ¦¨§680 District District 2 Current Alamo WALNUT Current Legend Concept District 1 Concept District 2 District 3 west District 3 CREEK Concept District 3 Concept District 4 Concept District 5 of I-680 District 4: south of Concord Ave,south of Clayton Rd Current Supervisorial District School District City Limit

Map Created for May 3, 2011 Board of Supervisors Meeting Contra Costa County Department of Conservation & Development 651 Pine Street, 4th Floor - N. Wing, Martinez, CA 94553-0095 Prepared by the Department of Conservation and Development - GIS Group 37:59:48.455N 122:06:35.384W Contra Costa County Population Summary - 2011 Supervisorial District - Concept 04 Supervisorial 2010 Census Supervisorial 2010 Census Supervisorial 2010 Census Place Place Place District Population District Population District Population

Incorporated Area (Cities) Incorporated Area (Cities) Incorporated Area (Cities) 1 El Cerrito 2 3,549 2 Danville 4 2,039 3 Antioch 1 02,365 1 Pinole 1 8,366 2 Lafayette 2 3,893 3 Brentwood 5 1,488 1 Richmond 1 03,701 2 Moraga 1 6,016 3 Oakley 3 5,432 1 San Pablo 2 9,139 2 Orinda 1 7,643 Subtotal 1 89,285 Subtotal 1 74,755 2 San Ramon 7 2,160 2 Walnut Creek (Partial) 1 3,616 Unincorporated Area Unincorporated Area Subtotal 1 85,367 3 Bethel Island CDP 2,137 1 Bayview CDP 1,754 3 Byron CDP & MAC 1,416 1 East Richmond Heights CDP 3,280 Unincorporated Area 3 Discovery Bay CDP 1 3,352 1 El Sobrante CDP & MAC 1 4,033 2 Acalanes Ridge CDP 1,137 3 Knightsen CDP & TAC 1,729 1 Kensington CDP 5,077 2 Blackhawk CDP 9,354 3 Sandmound Slough (Remainder of Bethel Island 7 77 1 Montalvin Manor CDP 2,876 2 Camino Tassajara CDP 2,197 MAC) 1 North Richmond CDP 3,717 2 Norris Canyon CDP 9 57 Other Unincorporated (Includes Unincorporated 1 Rollingwood CDP 2,969 2 Saranap CDP 5,202 3 North Antioch, Ag Core, Morgan Territory Rd, 3,391 1 Tara Hills CDP 5,126 Marsh Creek Rd, Delta Islands) 2 Other Unincorporated (Includes Canyon, North and 1,196 1 Other Unincorporated (includes western Briones) 5 9 South Bollinger Canyon) Subtotal 2 2,802 Subtotal 3 8,891 Subtotal 2 0,043 District 3 Total 212,087 District 1 Total 213,646 District 2 Total 205,410 Supervisorial 2010 Census Place District Population Supervisorial 2010 Census Place Incorporated Area (Cities) District Population 4 Clayton 1 0,897 4 Concord (Partial) 7 4,158 Incorporated Area (Cities) 4 Martinez (Partial) 3,781 5 Concord (Partial) 4 7,903 4 Pleasant Hill 3 3,158 5 Hercules 2 4,132 4 Walnut Creek (Partial) 5 0,557 5 Martinez (Partial) 3 2,043 Subtotal 1 72,551 5 Pittsburg 6 3,264 Subtotal 1 67,342 Unincorporated Area 4 Alamo CDP 1 4,840 Supervisorial Districts - Concept 04 Unincorporated Area 4 Alhambra Valley CDP 9 26 5 Ayers Rd Neighborhood 8 07 4 Castle Hill CDP 1,029 5 Bay Point CDP 2 1,349 4 Contra Costa Centre CDP 5,364 5 Clyde CDP 7 10 4 Contra Costa Centre (north of Mayhew Way) 5 09 5 5 Crockett CDP 3,094 4 Diablo CDP 1,158 5 Mountain View CDP 2,372 4 North Gate CDP 6 79 1 5 Pacheco CDP & MAC 3,689 4 Pacheco South 1 86 5 Port Costa CDP 1 90 4 Reliez Valley CDP 3,101 4 3 5 Rodeo CDP 8,679 4 San Miguel CDP & Walnut Heights Neighborhood 3,610 5 Vine Hill CDP 3,761 4 Shell Ridge CDP 9 59 5 Other Unincorporated (Includes Unincorporated 2 23 Other Unincorporated (includes Unincorporated North Antioch, Kirker Pass Rd) 4 7 54 Clayton, Eastern Briones, Kirker Pass Rd) 2 Subtotal 3 3,115 Subtotal 4 4,874

District 4 Total 205,666 District 5 Total 212,216

Census Geography does not always coincide with actual Map Created for May 3, 2011 Board of Supervisors Meeting jurisdictional boundaries. This Population Summary is based Contra Costa County Department of Conservation & Development 651 Pine Street, 4th Floor - N. Wing, Martinez, CA 94553-0095 Prepared by the Department of Conservation and Development - GIS Group on an ongoing detailed analysis and is subject to small changes. 37:59:48.455N 122:06:35.384W