List of dams and reservoirs in Idaho explained

This is a list of dams and reservoirs in the U.S. state of Idaho.

NameRiverTypeHeightReservoirCapacityCapacityOwnerBuilt
Ftmacre.ftkm3MW
Albeni Falls DamPend Oreille RiverConcrete gravity90feetLake Pend Oreille1153000acre feet?USACE1955
Alexander DamBear RiverConcrete gravity94feetAlexander Reservoir15760acre feet14PacifiCorp1925
American Falls DamSnake RiverConcrete gravity94feetAmerican Falls Reservoir1671300acre feet112USBR1978
Anderson Ranch DamSouth Fork Boise RiverEarthfill456feetAnderson Ranch Reservoir503500acre feet40USBR1950
Black Canyon Diversion DamPayette RiverConcrete gravity183feetBlack Canyon Reservoir31200acre feet10USBR1924
Arrowrock DamBoise RiverConcrete arch350feetArrowrock Reservoir300850acre feet0USBR1915
Blackfoot DamBlackfoot RiverEarthfill55feetBlackfoot Reservoir417000acre feet0Idaho Bureau of Indian Affairs1911
Bliss DamSnake RiverConcrete gravity70feetBliss Reservoir11000acre feet75Idaho Power1950
Brownlee DamSnake RiverEarthfill420feetBrownlee Reservoir1426700acre feet585.4Idaho Power1958
C. J. Strike DamSnake RiverEarthfill115feetC. J. Strike Reservoir247000acre feet82.8Idaho Power1952
Cabinet Gorge DamClark ForkConcrete arch111feetCabinet Gorge Reservoir106000acre feet231Avista Utilities1953
Cascade DamNorth Fork Payette RiverEarthfill107feetLake Cascade693100acre feet12.4USBR1948
Cedar Creek DamCedar CreekEarthfill84feetCedar Creek Reservoir30000acre feet0Cedar Mesa Canal & Reservoir Co.1920
Crane Creek DamCrane CreekEarthfill55feetCrane Creek Reservoir56800acre feet?Crane Creek Reservoir Administrative Board1912
Deadwood DamDeadwood RiverConcrete arch165feetDeadwood Reservoir154000acre feet0USBR1931
Dworshak DamNorth Fork Clearwater RiverConcrete gravity717feetDworshak Reservoir3468000acre feet460USACE1973
Fish Creek DamFish CreekConcrete multiple arch88feetFish Creek Reservoir12743acre feet0Carey Valley Reservoir Co.1923
Hells Canyon DamSnake RiverConcrete gravity330feetHells Canyon Reservoir188000acre feet391Idaho Power1967
Island Park DamHenrys ForkEarthfill94feetIsland Park Reservoir135205acre feet0USBR1939
Little Camas DamLittle Camas CreekEarthfill44feetLittle Camas Reservoir18400acre feet0Mountain Home Irrigation District1912
Little Wood River DamLittle Wood RiverEarthfill169feetLittle Wood River Reservoir33300acre feet3USBR1939
Lucky Peak DamBoise RiverEarthfill340feetLucky Peak Lake307000acre feet101USACE1955
Mackay DamBig Lost RiverEarthfill67feetMackay Reservoir45000acre feet0Big Lost River Irrigation District1918
Magic DamBig Wood RiverEarthfill128feetMagic Reservoir195000acre feet9Magic Reservoir Hydroelectric, Inc.1910
McArthur LakeDeep CreekEarthfillMcArthur LakeIdaho Fish and Game1942
Milner DamSnake RiverRockfill73feetMilner Lake36300acre feet58.3Milner Dam, Inc.1905
Minidoka DamSnake RiverEarthfill/concrete86feetLake Walcott210200acre feet28USBR1906
Mormon DamMcKinney CreekEarthfill23feetMormon Reservoir19280acre feet0Twin Lakes Reservoir & Irrigation Co.1908
Oakley DamGoose CreekEarthfill139feetLower Goose Creek Reservoir76000acre feet0Oakley Canal Co.1916
Oneida DamBear RiverConcrete gravity102feetOneida Narrows Reservoir11400acre feet30PacifiCorp1913
Paddock Valley DamLittle Willow CreekEarthfill43feetPaddock Valley Reservoir36400acre feet0Little Willow Irrigation District1949
Ririe DamWillow CreekEarthfill253feetRirie Reservoir100500acre feet0USBR1977
Oxbow DamSnake RiverRockfill175feetOxbow Reservoir58200acre feet190Idaho Power1961
Palisades DamSnake RiverEarthfill270feetPalisades Reservoir1200000acre feet176.5USBR1957
Post Falls DamSpokane RiverConcrete gravity57.8feetCoeur d'Alene Lake225000acre feet14.75Avista Utilities1906
Priest Lake DamPriest RiverConcrete gravity8feetPriest Lake143000acre feet?Idaho Department of Water Resources1978
Sage Hen DamSage Hen CreekEarthfill38feetSage Hen Reservoir5210acre feet0Squaw Creek Irrigation Company1938
Salmon Falls DamSalmon Falls CreekConcrete arch217feetSalmon Falls Creek Reservoir230650acre feet0Salmon River Canal Co.1911

See also