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High Risk Dams in Oregon

Oregon has 30 high hazard dams with a condition assessment of poor or unsatisfactory. These are dams where failure would probably cause loss of human life and where recognized safety deficiencies have been identified.

Of the 149 high hazard dams in Oregon, 30 (20%) have concerning condition ratings — 18 rated poor and 12 rated unsatisfactory.

Condition scale, best to worst
  1. Satisfactory No existing or potential safety deficiencies recognized; acceptable performance expected under all loading conditions.
  2. Fair No deficiencies under normal operating conditions; a rare flood or earthquake could create one.
  3. Poor A safety deficiency is recognized under normal operating conditions; remedial action is necessary.
  4. Unsatisfactory Worst rating. The dam is considered unsafe; a deficiency requires immediate or emergency remedial action.

"Not rated" means no assessment is on file in the National Inventory of Dams.

DamCountyHeight (ft)ConditionLast inspectedPurposeYear
SmithLinn235Unsatisfactory09/21/20224 yrs agoHydroelectric1963
Hosler (reeder GulchJackson114Unsatisfactory08/12/20215 yrs agoWater Supply1928
Willow Creek 3 (malheur)Malheur110Unsatisfactory10/01/20215 yrs agoIrrigation1944
Clear BranchHood River110Unsatisfactory09/20/20224 yrs agoIrrigation1969
Bear CreekClatsop94Poor11/11/20214 yrs agoWater Supply1953
Woodrat KnobJackson92Unsatisfactory07/13/20215 yrs agoIrrigation1960
CrowleyMalheur90Unsatisfactory08/25/20206 yrs agoIrrigation1938
Trail BridgeLinn90Unsatisfactory09/20/20224 yrs agoHydroelectric1963
Currant CreekWasco82Poor10/20/20205 yrs agoIrrigation1984
MercerPolk81Poor10/19/20214 yrs agoWater Supply1961
Happy ValleyWasco70Poor06/14/20224 yrs agoIrrigation1938
Walch DamJackson68Poor11/03/20214 yrs agoIrrigation1954
Ferry CreekCurry65Unsatisfactory09/24/20215 yrs agoWater Supply1966
Osborne CreekJackson65Poor07/13/20215 yrs agoIrrigation1964
Pole CreekMalheur58Poor10/01/20215 yrs agoIrrigation1944
ToketeeDouglas58Unsatisfactory09/22/20251 yr agoHydroelectric1949
Big Creek #2 (upper)Lincoln58Unsatisfactory06/29/20215 yrs agoWater Supply1970
Jubilee LakeUnion50Poor08/26/20215 yrs agoRecreation1967
Mcmullen CreekJosephine45Unsatisfactory07/15/20215 yrs agoRecreation1961
WagemanDouglas42Poor11/03/20214 yrs agoIrrigation1971
Wallowa LakeWallowa40Poor08/25/20206 yrs agoIrrigation1931
MaysJefferson38Poor05/08/20197 yrs agoIrrigation1960
Pony Creek - LowerCoos38Poor09/23/20215 yrs agoWater Supply1988
Lonesome LakeMalheur35Poor08/26/20206 yrs agoIrrigation
Barnes ButteCrook33Poor08/06/20215 yrs agoIrrigation1956
DugganJackson24Poor07/14/20215 yrs agoRecreation1965
Morgan LakeUnion24Poor08/25/20215 yrs agoRecreation1976
Walterville ForebayLane24Poor08/14/20251 yr agoHydroelectric1911
Big Creek #1 (lower)Lincoln21Unsatisfactory06/29/20215 yrs agoWater Supply1951
WinchesterDouglas17Poor07/15/20215 yrs agoRecreation1904

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