Monticello Dam

Monticello Dam and Lake Berryessa

Monticello Dam is located on Putah Creek where the stream crosses the eastern boundary of Napa County.  It regulates flows along the lower reaches of Putah Creek and stores surplus water. The dam is a concrete, medium-thick arch structure with a height of 304 feet above the foundation and a crest length of 1,023 feet.

Monticello Dam Powerplant was built in 1983.  It is at the base of the Monticello Dam, and has 3 generators. The was built under a FERC license and is owned, operated and maintained by Solano Irrigation District.

Lake Berryessa has a storage capacity of 1,602,000 acre-feet. 

Lake Berryessa Website

RegionFacilities in Mid-Pacific | Mid-Pacific Home Page
Dam TypeConcrete
ReservoirLake Berryessa
WatercoursePutah Creek
Original Construction1953-1957
Modified Construction
National ID NumberCA10170
Hydrologic Unit Code

Structural Height304.0 ft
Hydraulic Height (Normal Operating Depth at Dam)239.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation456.0 ft
Crest Length1023.0 ft
Crest Width12.0 ft
Base Width100.0 ft
Volume of Dam Construction Materials326000.0 cu yd
Streambed at Dam Axis
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)549.0 ft
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)

Hydraulics & Hydrology
Total Water Storage at Elevation48400.0 acre-ft at 455.5
Maximum Water Surface Elevation
Normal Water Surface Elevation
Spillway Type
Auxiliary Spillway
Spillway Capacity at Elevation
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation2580.0 cfs at 455.5 ft
Diversion Capacity at Elevation
Drainage Area566.00 sq mi
Hydrometeorological Report (HMR)HMR
Probable Maximum Flood (PMF) Report

Contact Information
TitleArea Office Manager
OrganizationCentral California Area Office
Address7794 Folsom Dam Road
CityFolsom, CA 95630
Phone (Office)916 989-7200
OrganizationSolano County Water Agency
Address508 Elmira Road
CityVacaville, CA 95687
Phone (Fax)707 448-7347
Phone (Office)707 451-2852

Last updated: May 26, 2010