Terminal Dam


Terminal Diversion Dam

Putah Diversion Dam diverts water into Putah South Canal about 6 miles (9.7 km) downstream of Monticello Dam. The dam is a gated concrete weir structure with an earth-fill embankment wing. It creates the small Lake Solano, which has a capacity of only 750 acre-feet (930,000 m³).

The canal is entirely concrete-lined except for a mile (1.6 km) of pipe called the Putah South Pipeline. Most of the lands are below the level of the canal and are served by gravity. Lands above pump water straight from the canal. The canal ends at Terminal Dam, which is made from earth-fill.

The dam forms a small 119 acre-foot (147,000 m³) reservoir. The reservoir supplies drinking water to the city of Vallejo. Most of the canal is operated by Solano Irrigation District, but the Bureau of Reclamation operates the headworks.

RegionFacilities in Mid-Pacific | Mid-Pacific Home Page
Dam Type
WatercourseOffstream Storage
Original Construction1959
Modified Construction
National ID NumberCA10195
Hydrologic Unit Code

Structural Height24.0 ft
Hydraulic Height (Normal Operating Depth at Dam)19.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation90.0 ft
Crest Length870.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis75.0 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)87.0 ft
Top of Inactive Conservation Pool (Elevation)85.0 ft
Top of Dead Storage Pool (Elevation)77.6 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation87.0 ft
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation0.0 cfs at 0.0 ft
Auxiliary Spillway Capacity at Elevation0.0 cfs at 0.0 ft
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation0.0 cfs at 0.0 ft
Diversion Capacity at Elevation
Drainage Area
Hydrometeorological Report (HMR)
Probable Maximum Flood (PMF) Report

Contact Information
OwnerNo value defined
OperatorNo value defined

Last updated: Jun 04, 2009