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San Luis Unit Project
San Luis Unit - West San Joaquin Division (CVP) | Project History | Project Data | Contact Information

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


Project # 805

Land Areas (1992)
Irrigable area:
Full Irrigation Serviceacres
Supplemental Service594,351 acres
Temporary Irrigation Service321 acres
Number of Irrigated Farms364
Residential, Commercial, Industrial Lands
Total Irrigable Lands

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

Reservoir Storage

California Data Exchange Center Reservoir Levels for San Luis Reservoir

(California Data Exchange Center Precipitation Station - Los Banos)


Panoche Creek at I-5 near Silver Creek, 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
Normal10.60 in
Maximum - 198321.61 in
Minimum - 19666.07 in
Fresno, California 1961-1990

Mean Annual63.1 ?F
Daily Maximum - 07/05/1991112 ?F
Daily Minimum - 01/10/194918 ?F
Fresno, California 1948-1996
Growing Season280 days
Elevation of irrigable area310 ft

San Luis Creek
Drainage area at B. F. Sisk Dam84.6 mi2
Annual discharge


San Luis Creek near Los Banos, California (USGS)

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Project Water Quality

Middle San Joaquin - Lower Chowchilla

Panoche - San Luis Reservoir

Tulare - Buena Vista Lakes

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Facilities in Operation
Storage Facilities
Carriage Facilities
Pumping Plants
Power Facilities


Facilities in Operation
Storage Dams4
Canals115 mi
Tunnels1.8 mi
Pumping Plants
San Luis Canal
San Luis Water District6
Westlands Water District
Irrigation Pumping92
Drainage Pumping87
Drains84 mi

1 Includes Dos Amigos and San Luis Substations,operated by the State of California.

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Storage Facilities

B.F. Sisk Dam - Formerly San Luis Dam

Little Panoche Detention Dam

Los Banos Creek Detention Dam

O`Neill Forebay Dam

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Carriage Facilities
San Luis Canal
LocationFrom O'Neill Forebay south to Kettleman City, California .
Construction period1963-1968
Length101.3 mi
Capacity13,100 cfs
Typical section - initial reach
Bottom width110 ft
Side slopes2:1
Water depth32.8 ft

Coalinga Canal
LocationFrom above the Pleasant Valley Pumping Plant extends southwest and somewhat parallel to the San Luis Canal.
Construction period1968-1973
Length11.6 mi
Capacity1,100 cfs
Typical section - initial reach
Bottom width12 ft
Side slopes1.5:1
Water depth11.3 ft

O`Neill Forebay Inlet Channel
LocationAt O'Neill Forebay.
Construction period1965-1966
Length0.5 mi
Capacity4,200 cfs
Typical section:
Bottom width80 ft
Side slopes1.5:1

Pleasant Valley Intake Channel
Construction period1968-1969
Length1.6 mi
Capacity1,140 cfs
Typical section:
Bottom width12 ft
Side slopes1.5:1
Water depth11.8 ft

Pachco Tunnel - Reach 1
LocationFrom Inlet in San Luis Reservoir west under reservoir.
Construction period1954-1968
Length9,540 ft
Capacity670 cfs
Cross section:Circular
Diameter12.5 ft
Lining type:Concrete
Lining Thickness8-18 in

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Pumping Plants

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Power Facilities

San Luis Pumping-Generating Plant

O`Neill Pumping-Generating Plant

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Last updated: Apr 21, 2011