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High Risk Dams in New York

New York has 103 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 431 high hazard dams in New York, 103 (23%) have concerning condition ratings — 97 rated poor and 6 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
Inghams DamFulton125Poor01/30/20242 yrs agoHydroelectric1911
TorontoSullivan103Unsatisfactory08/11/20224 yrs agoHydroelectric1926
Mill Brook Site 2 DamChenango87Poor09/30/20242 yrs agoFlood Risk Reduction1986
Ilion Reservoir #3 DamHerkimer76Poor01/30/20242 yrs agoWater Supply1921
60 Foot DamTompkins75Poor02/27/20251 yr agoWater Supply1911
Seneca FallsSeneca68Unsatisfactory08/10/20224 yrs agoHydroelectric1912
Ephratah DamFulton65Poor04/11/20242 yrs agoHydroelectric1980
East Canada Lake DamHerkimer65Poor01/30/20242 yrs agoHydroelectric1924
Beecher Creek Flood Control DamChemung63Poor07/25/20242 yrs agoFlood Risk Reduction1999
StillwellOrange62Unsatisfactory09/13/20197 yrs agoWater Supply1948
Ilion Reservoir #2 DamHerkimer60Poor01/30/20242 yrs agoWater Supply1903
Martin Dunham Reservoir DamRensselaer59Poor01/05/20242 yrs agoRecreation1913
Eaton Brook Reservoir DamMadison58Poor06/03/20242 yrs agoNavigation1893
Port Creek Reservoir DamFulton56Poor03/27/20251 yr agoWater Supply1930
Lake Moraine DamMadison56Poor11/02/20232 yrs agoNavigation1836
Waverly Lower Reservoir DamTioga54Poor02/14/20242 yrs agoWater Supply1880
Oquaga Creek State Park DamBroome54Poor12/13/20241 yr agoRecreation1976
Jamesville Reservoir DamOnondaga53Poor06/03/20242 yrs agoNavigation1874
Melzingah DamDutchess51Poor03/28/20233 yrs agoWater Supply1924
Oneida City Reservoir DamOneida50Poor09/22/20233 yrs agoWater Supply1926
Indian Lake Stone DamHamilton47Poor05/21/20242 yrs agoRecreation1898
First Reservoir DamRockland46Poor05/07/20251 yr agoWater Supply1917
Lower (south) Wiccopee DamPutnam45Poor03/24/20251 yr agoWater Supply1913
Fairport Reservoir Dam #1Ontario45Poor04/10/20251 yr agoRecreation1923
Honk Falls DamUlster42Poor07/25/20197 yrs agoRecreation1898
Ilion Reservoir #1 DamHerkimer40Poor01/30/20242 yrs agoWater Supply1895
Lock 32 Dam Erie CanalMonroe40Poor03/28/20242 yrs agoNavigation1908
Green Haven Correctional Facility DamDutchess40Poor11/06/20241 yr agoFire Protection, Stock, Or Small Fish Pond1939
Lock 33 Dam Erie CanalMonroe40Poor03/28/20242 yrs agoHydroelectric1908
Tillson Lake DamUlster39Poor06/14/20242 yrs agoRecreation1930
Peck Lake DamFulton39Poor04/11/20242 yrs agoHydroelectric1910
Pelto DamTioga39Poor02/14/20242 yrs agoFlood Risk Reduction1955
Altamont Main Reservoir DamAlbany37Poor04/09/20242 yrs agoWater Supply1898
Goshen Reservoir #1 DamOrange37Poor03/18/20242 yrs agoWater Supply1963
Ed Pylkas DamTioga37Poor02/14/20242 yrs agoFlood Risk Reduction1955
Roxbury DamDelaware36Poor01/02/20242 yrs agoRecreation1912
30 Foot DamTompkins36Poor02/27/20251 yr agoRecreation1903
Hoffman Creek DamChemung36Poor07/25/20242 yrs agoWater Supply1871
Beaver Brook Site #1 DamHerkimer36Poor01/30/20242 yrs agoFlood Risk Reduction2002
Rockwood Power DamFulton35Poor04/11/20242 yrs agoRecreation1916
Lake FrederickOrange35Poor09/13/20197 yrs agoRecreation1911
Utica Reservoir #5 DamOneida34Poor09/22/20233 yrs agoWater Supply1896
Swan Lake DamWestchester34Poor01/12/20242 yrs agoRecreation1933
East Syracuse Reservoir DamOnondaga33Poor06/03/20242 yrs agoRecreation1922
Lake Welch DamRockland32Poor05/07/20251 yr agoRecreation1937
Blind Brook Club DamWestchester32Poor02/04/20251 yr agoIrrigation1959
Popolopen LakeOrange32Poor09/13/20197 yrs agoWater Supply
Larchmont Water Company Dam #2Westchester31Poor03/21/20242 yrs agoRecreation1935
Binnewater Reservoir Dam & DikeUlster30Poor07/12/20233 yrs agoRecreation1926
Lake Sebago DamRockland30Poor10/10/20241 yr agoRecreation1925
Loughberry Lake DamSaratoga30Poor01/09/20251 yr agoWater Supply
New Rochelle Reservoir #3 DamWestchester30Poor01/12/20242 yrs agoRecreation1908
Rensselaer Lake DamAlbany30Poor04/25/20242 yrs agoRecreation1850
New Rochelle Reservoir #1 DamWestchester30Poor03/20/20242 yrs agoRecreation1894
Lusk ReserviorOrange30Poor09/13/20197 yrs agoWater Supply1895
Tivoli Lake DamRockland29Poor08/28/20242 yrs agoRecreation1908
Rexmere DamDelaware27Poor01/02/20242 yrs agoRecreation1965
Byram Lake Reservoir DamWestchester27Poor02/05/20251 yr agoWater Supply
Melody Lake DamCortland26Poor07/18/20242 yrs agoRecreation1902
Ymca Camp Mcalister DamOrange26Poor04/02/20251 yr agoRecreation1955
Harrower Pond DamMontgomery25Poor12/11/20241 yr agoRecreation1870
Perkins Estate Pond DamPutnam25Poor03/17/20251 yr agoRecreation1927
Cold Spring Dam (lower)Putnam25Poor07/31/20242 yrs agoWater Supply1942
Upper Larchmont Road DamChemung25Poor07/25/20242 yrs agoFlood Risk Reduction2005
Mckinley Mall Retention Pond DamErie25Poor09/26/20242 yrs agoFlood Risk Reduction1985
Lake Carmel DamPutnam25Poor03/07/20242 yrs agoRecreation1930
Lake Cohasset Upper DamOrange25Poor10/04/20233 yrs agoRecreation1924
Rainbow Lake DamHamilton25Poor11/05/20205 yrs agoRecreation1929
Main Mill DamClinton25Poor05/16/20242 yrs agoHydroelectric1881
Cold Spring Dam (upper)Putnam23Poor01/24/20251 yr agoWater Supply1934
Lake Lincolndale DamWestchester22Poor01/02/20251 yr agoRecreation1935
Lake JeffersonSullivan22Unsatisfactory06/05/20251 yr agoHydroelectric1927
Churchill DamDelaware21Poor01/02/20242 yrs agoRecreation1965
Basic Creek DamAlbany21Poor04/09/20242 yrs agoWater Supply1928
Lock 24 Dam Erie CanalOnondaga21Poor12/14/20214 yrs agoHydroelectric1908
Irvington Water Works DamWestchester20Poor03/20/20242 yrs agoOther1900
Crystal Lake DamOrange20Poor03/18/20242 yrs agoRecreation1937
Fairport Reservoir Dam #2Ontario20Poor04/10/20251 yr agoRecreation1932
Tyrone Power Company DamSchuyler20Poor02/13/20251 yr agoRecreation1953
MUD Lock C&s Canal DamCayuga20Poor02/06/20251 yr agoNavigation1912
Mamaroneck Reservoir DamWestchester19Poor03/21/20242 yrs agoFlood Risk Reduction1928
Chazy Lake DamClinton19Poor09/26/20233 yrs agoRecreation1926
S. Greece Waste Weir DamMonroe19Poor01/23/20251 yr agoNavigation1918
Lake Adirondack DamHamilton18Poor05/21/20242 yrs agoRecreation1910
Red Creek DamWayne18Poor05/09/20242 yrs agoRecreation
Delafield PondOrange18Unsatisfactory09/13/20197 yrs agoRecreation
Tarrytown Waterworks DamWestchester18Poor01/02/20251 yr agoWater Supply1897
Bear Gulch Pond DamSchoharie18Poor10/22/20241 yr agoRecreation1910
Lake Peekskill DamPutnam16Poor03/24/20251 yr agoRecreation1928
Harrison Spillway DamWayne16Poor03/28/20242 yrs agoNavigation1918
Still Lake DamWestchester16Poor01/12/20242 yrs agoRecreation1930
Stump Pond DamCortland15Poor08/29/20242 yrs agoRecreation1928
Loon Lake DamWarren15Poor05/14/20251 yr agoRecreation1941
Guilford Lake DamChenango15Poor05/27/20251 yr agoWater Supply1827
Croton Road Dam and DikeWestchester15Poor02/04/20251 yr ago
Lake Lucille DamRockland13Poor10/10/20241 yr agoRecreation1935
Hemlock Lake DamLivingston12Poor05/02/20242 yrs agoWater Supply1926
Mill Pond DamRensselaer12Poor01/05/20242 yrs agoRecreation1918
Pine Grove Lake DamRockland12Poor04/16/20251 yr agoRecreation1968
Canadice Lake DamOntario11Poor05/02/20242 yrs agoWater Supply1947
Upper Massapequa Lake DamNassau11Poor11/22/20241 yr agoRecreation1900
Westchester Lake DamWestchester10Poor03/20/20242 yrs agoRecreation1920
Lower Cragston LakeOrange10Unsatisfactory09/13/20197 yrs agoRecreation

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