>reservoirs
A ton of them in that area:
https://california.hometownlocator.com/features/cultural,class,reservoir,scfips,06055.cfm
Alfalfa Patch Reservoir Lake Berryessa
Bell Canyon Reservoir Saint Helena
Catacoula 411 Dam Saint Helena
Cooksley Lake Saint Helena
Deer Lake Saint Helena
Doe Lake Saint Helena
Duvall Lake Aetna Springs
East Napa Reservoir Napa
East Side Reservoir Napa
Fiege Reservoir Calistoga
Hacienda Water Tank Napa
Lake Berryessa Lake Berryessa
Lake Camille Napa
Lake Curry Mount George
Lake Henne Saint Helena
Lake Hennessey Yountville
Lake Hinman Rutherford
Lake Marie Mount George
Lake Newton Saint Helena
Lake Orville Saint Helena
Lake Whitehead Saint Helena
Milliken Reservoir Capell Valley
Moskowitz Reservoir Capell Valley
Mud Lake Capell Valley
Pacifica Water Tank Napa
Rector Reservoir Yountville
Red Lake Saint Helena
Weeks Lake Aetna Springs
West Napa Reservoir Napa
Wild Lake