Dams in Lewis and Clark County, Montana

30Total Dams
11High Hazard
2Significant
DamHazardConditionHeight (ft)PurposeYear
Canyon Ferry DamHighNot Available225Flood Risk Reduction1954
Hauser DamHighSatisfactory125Hydroelectric1911
Holter DamHighSatisfactory124Hydroelectric1918
Three Mile Reservoir (l.&c.)HighPoor70Irrigation1926
Chessman Main DamHighFair57Water Supply1908
Nilan North DamHighSatisfactory54Irrigation1951
Nilan East DamHighSatisfactory51Irrigation1951
Hinman DamHighNot Rated34Other2000
Scott ReservoirHighFair32Water Supply1952
Helena Valley DikeHighNot Available30Irrigation1959
Willow Creek Bor Mt-dike 3HighNot Available31941
Smith LakeSignificant15Fire Protection, Stock, Or Small Fish Pond1954
Gravelly Range LakeSignificant12Irrigation1964
J B Long And Company #3Low34Irrigation1950
Soap CreekLow25Irrigation1950
Deerborn ReservoirLow20Irrigation1900
Curran-barrett #2Low20Irrigation1899
Thompson, FrankLow20Irrigation1972
Evans, L.Low20Fire Protection, Stock, Or Small Fish Pond1961
J B Long And Company #2Low20Fire Protection, Stock, Or Small Fish Pond1930
DetergentLow15Fire Protection, Stock, Or Small Fish Pond1956
KrezelokLow15Irrigation1945
Anderson LakeLow15Fire Protection, Stock, Or Small Fish Pond1956
Curran-barrett #1Low15Irrigation1940
Flat Milford ColonyLow15Fire Protection, Stock, Or Small Fish Pond1955
Herrin LakeLow15Fire Protection, Stock, Or Small Fish Pond1949
Milford ColonyLow15Fire Protection, Stock, Or Small Fish Pond1963
Wood Lake DamLowNot Rated13Other1955
Really RedLow10Fire Protection, Stock, Or Small Fish Pond1953
PorriniLow10Irrigation1952