List of Dams Reservoirs in the California Central Coast Region

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The following is a sortable table of currently operating dams and reservoirs and a list of former dams and reservoirs in California's Central Coast Region[1].

Currently Operating Dams and Reservoirs

Reservoir Dam River/Stream County Owner Year Built Type Storage (acre ft)
Gibraltar Reservoir Gibraltar Dam Santa Ynez River Santa Barbara City of Santa Barbara 1920 Constant radius arch 9,998
Hernandez Reservoir Hidden Dam San Benito River San Benito San Benito County Water District 1962 Earthen 90,000
Lake Nacimiento Nacimiento Dam Nacimiento River San Luis Obispo Monterey County Water Authority 1961 Rock fill 350,000
Lake San Antonio San Antonio Dam San Antonio River Monterey Monterey County Water Authority 1965 Earthen 350,000
Loch Lomond Newell Creek Dam Newell Creek Santa Cruz Santa Cruz Water Dept. 1960 Earthen 9,200
Lopez Lake Lopez Dam Arroyo Grande Creek San Luis Obispo San Luis Obispo County Flood Control and Water Conservation District 1969 Earthen 52,500
Los Padres Reservoir Los Padres Dam Carmel River Monterey California American Water Company (CalAm) 1949 Earthen 1,775
Santa Margarita Lake Salinas Dam Salinas River San Luis Obispo US Army Corps of Engineers 1942 Variable radius arch 26,000
Twitchell Reservoir Twitchell Dam Cuyama River San Luis Obispo US Bureau of Reclamation 1958 Earthen 240,000
Whale Rock Reservoir Whale Rock Dam Old Creek San Luis Obispo Whale Rock Commission 1960 Earthen 40,662

Former Dams and Reservoirs

  • San Clemente Dam removed between 2015 and 2016 as a result of seismic safety hazards, sedimentation[2], and environmental concerns.[3]


  1. Wikipedia. 2020. List of dams and reservoirs in California
  2. California Water Association. 2019. Fish rebound after San Clemente Dam Removal.
  3. URS Corporation. 2012. San Clemente Dam seismic safety project final supplement to the EIR, No. 2 Old Carmel River Dam removal.



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