Dams in Tuolumne County, California

32Total Dams
19High Hazard
3Significant

Dam Safety in Tuolumne County, California

Tuolumne County has 32 dams tracked in the National Inventory of Dams. Of these, 19 are classified as high hazard — meaning failure would probably cause loss of human life. Another 3 carry a significant hazard classification. Currently, 1 dams have a condition assessment of poor or unsatisfactory.

The average dam in Tuolumne County is 79 years old. The most common purpose is water supply. The tallest dam is Donnells at 317 ft.

DamHazardConditionHeight (ft)PurposeYear
DonnellsHighSatisfactory317Hydroelectric1958
Cherry ValleyHighFair315Other1956
O`shaughnessyHighSatisfactory312Water Supply1923
BeardsleyHighFair284Hydroelectric1957
New Spicer MeadowHighSatisfactory265Hydroelectric1989
PriestHighSatisfactory168Other1923
StrawberryHighFair143Hydroelectric1916
ReliefHighPoor140Hydroelectric1909
LyonsHighSatisfactory132Hydroelectric1930
Big CreekHighSatisfactory120Water Supply1969
Gasburg Creek DikeHighSatisfactory75Flood Risk Reduction1971
Lake EleanorHighSatisfactory61Water Supply1918
Moccasin LerHighFair60Other1930
Brentwood ParkHighSatisfactory58Water Supply1964
PhoenixHighSatisfactory52Other1880
Groveland Wastewater Reclamation #2HighSatisfactory45Water Supply1981
San Diego ReservoirHighSatisfactory39Water Supply1860
Twain HarteHighSatisfactory36Water Supply1928
Tuolumne Log PondHighSatisfactory24Water Supply1912
Mckays Point DiversionSignificantSatisfactory242Hydroelectric1989
Don Pedro Dike ASignificantSatisfactory25Hydroelectric1971
Herring Creek ReservoirSignificantNot Rated16Fish and Wildlife Pond1939
QuartzLowSatisfactory104Water Supply1978
GardellaLowSatisfactory69Water Supply2009
Early IntakeLowFair56Other1925
Grinding RockLowSatisfactory55Water Supply1979
Stanislaus Forebay EastLowSatisfactory55Hydroelectric1908
Beaver Creek DiversionLowSatisfactory54Hydroelectric1989
Beardsley AfterbayLowSatisfactory33Hydroelectric1958
KilmerLowSatisfactory31Water Supply1953
Middle CooperstownLowSatisfactory24Water Supply1947
Leland MeadowsLowSatisfactory17Water Supply1978