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Delta Division Project
Delta Division (CVP) | Project History | Project Data | Contact Information

Project Data
Land Areas (1992)
Area Irrigated and Crop Value


Project # 863/214

Land Areas (1992)
Irrigable area:
Full Irrigation Service46,645 acres
Supplemental Service193,274 acres
Temporary Irrigation Service140,174 acres
Number of Irrigated Farms3,373
Residential, Commercial, Industrial Lands0 acres
Total Irrigable Lands380,093 acres

Population Served:
Farm Population Served
Non-Farm Population Served
Total Population Served

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Area Irrigated and Crop Value
YearActual Area Irrigated (Acres)Crop Value (Dollars)

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Project Water Supply
Project Water Quality


Project Water Supply

Current Conditions


San Joaquin River near Vernalis, California (USGS)
Streamflow Forecast Map

Spring and Summer (NRCS)
Snowpack Information

Mountain Snowpack Maps for Great Basin and California
Drought Index

Palmer Drought Index Map
Explanation of Palmer Drought Severity Index (Text)

Historic Conditions

Annual Precipitation
Normal13.95 in
Maximum - 198326.65 in
Minimum - 19765.60 in
Stockton, California 1961-1990

Mean Annual61.5 ?F
Daily Maximum - 07/14/1972114 ?F
Daily Minimum - 01/11/194916 ?F
Stockton, California 1948-1996
Growing Season280 days
Elevation of irrigable area20-300 ft

Contra Costa Canal
Drainage area abovemi2
Annual discharge:
Maximum acre-ft
Minimum acre-ft


Contra Costa Canal near Oakley, California (USGS)

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Project Water Quality

Middle San Joaquin - Lower Chowchilla

San Joaquin Delta

Suisun Bay

Tulare - Buena Vista Lakes

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Facilities in Operation
Storage Facilities
Carriage Facilities
Pumping Plants


Facilities in Operation
Storage Dams2
Canals175.5 mi
Pipelines5.2 mi
Tunnels0.26 mi
Pumping Plants
Contra Costa Canal6
Delta-Mendota Canal3
Plain View Water District16
Transmission Lines2.31 mi

1Includes Port Chicago Substation owned by U.S. Navy, operated by Bureau of Reclamation.

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Storage Facilities

Contra Loma Dam

Martinez Dam

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Carriage Facilities
Contra Costa Canal
LocationOriginates at Rock Slough near Oakley, California, extends in a westerly direction along south side of Suisun Bay and terminates at Martinez Reservoir
Construction period1937-1948
Length47.7 mi
Capacity350 cfs
Typical section - initial reach
Bottom width24 ft
Side slopes3:1
Water depth6.5 ft

Delta Cross Channel
LocationFrom the Sacramento River near Walnut Grove, California to Snodgrass Slough
Construction period1950-1951
Length1.2 mi
Capacity3,500 cfs
Typical section - initial reach
Bottom width210 ft
Side slopes3:1
Water depth26 ft

Delta-Mendota Canal
LocationFrom Tracy Pumping Plant southeast along the west side of the San Joaquin Valley to the Mendota Pool on the San Joaqin River about 30 miles west of Fresno, California
Construction period1946-1951
Length116.6 mi
Capacity4,600 cfs
Typical section - initial reach
Bottom width100 ft
Side slopes3:01
Water depth14.3 ft

Clayton Canal
LocationFrom Contra Costa Canal generally southeast to its terminus in an agricultural area
Construction period1947-1948
Length4.8 mi
Capacity38 cfs
Typical section - initial reach
Bottom width4 ft
Side slopes1.25:1
Water depth2.2 ft

Ygnacio Canal
LocationFrom Contra Costa Canal generally south to its terminus in an agricultural area
Construction period1947-1948
Length5.2 mi
Capacity30 cfs
Typical section - initial reach
Bottom width5 ft
Side slopes1.5:1
Water depth1.9 ft

Delta-Contra Costa Shortcut Pipeline
LocationPre-tensioned concrete pipe, mortar coated, and mortar lined steel pipe
Construction period1971-1972
Length5.2 mi
Capacity90 cfs
Cross section:Circular
Diameter3.5-5 ft

Tunnel No. 1 - Contra Costa Canal
LocationAlong the Contra Costa Canal
Construction period1938-1939
Length1,360 ft
Capacity320 cfs
Cross section:Trapezoidal
Diameter9.25 ft
Lining type:Concrete
Lining thickness5-7 in

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Pumping Plants
DesignationNumber of unitsTotal capacity, cfsTotal dynamic head, ftTotal horsepower
Contra Costa Canal
Clayton Canal33989---
Contra Costa Canal No. 16410281,550
Contra Costa Canal No. 26410261,550
Contra Costa Canal No. 3641034.51,900
Contra Costa Canal No. 4639452.53,000
Ygnacio Canal23085---
Delta-Mendota Canal
Columbia Canal No. 1
Low Lift31005.5---
High Lift31009---
Mowry Canal21021---
Plain View Water District
Lateral 8.71520---
Lateral 9.31594---
Lateral 10.51210---
Lateral 12.11670---
Lateral 13.21238---
Lateral 14.01975---
Lateral 14.114.621---
Lateral 14.81313---
Lateral 15.11379---
Lateral 15.1-0.021222---
Lateral 16.116.925---
Lateral 16.71358---
Lateral 16.813.119---
Lateral 17.2-0.03RT1212---
Lateral 17.81560---
Lateral 19.41578---

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Last updated: Apr 21, 2011