Dams in Suffolk County, New York
69 dams on record, from New York's own published inventory. 4 have a computed filing deadline.
Argyle Lake Dam
low hazard
Avon Lake Dam
low hazard
Belmont Lake Dam
low hazard
Canaan Lake Dam
low hazard
Cedar Pond Dam
low hazard
Centerport Harbor Dam
low hazard
Cranford Lower Dam
low hazard
Cranford Middle Dam
low hazard
Cranford Upper Dam
low hazard
De Forest Dam
low hazard
Deer Lake Dam
low hazard
Dunton Lake Dam
unknown hazard
East Port West Dam
low hazard
Eastport East Dam
low hazard
Elda Lake Dam
low hazard
Fish Hatchery Dam
low hazard
Fresh Pond Dam
low hazard
Grange Bell Dam
low hazard
Great Patchogue Lake Dam
low hazard
Harned Dam
low hazard
Harper Dam
low hazard
Hatchery Pond Dam
low hazard
Hidden Lake Dam
unknown hazard
Islip Town Park Dam
low hazard
Knapps Lake Dam
low hazard
Lake Capri Dam
low hazard
Lefferts Grist Mill Dam
low hazard
Long Island Lighting Company Dam
low hazard
Lotus Lake Dam
intermediate hazard
EAP: None
Next due: January 31, 2027
Lower Cranberry Marsh Dam
low hazard
Lower Lake Dam
low hazard
Lower Mill Pond Dam
low hazard
Lower Winganhauppauge Lake Dam
low hazard
Middle Lake Dam
low hazard
Mill Pond Dam
low hazard
Mill Pond Dam
low hazard
Mill Pond Dam
low hazard
Millers Pond Dam
low hazard
New Mill Pond Dam
low hazard
Orowoc Lake Dam
low hazard
Peconic Lake Dam
low hazard
Peconic River Dam
unknown hazard
Peconic River Sportsman Club Dam
intermediate hazard
EAP: On File
Next due: January 31, 2027
Phillips Mill Pond Dam
intermediate hazard
EAP: On File
Next due: January 31, 2027
Potter Dam
low hazard
Quogue Waterfowl Refuge Dam #1
low hazard
Quogue Waterfowl Refuge Dam #2
low hazard
Robinson Pond Dam
low hazard
Setauket Mill Dam
low hazard
Southards Pond Dam
low hazard
Southaven Park Dam
low hazard
St Johns Lake Dam
low hazard
Stony Brook Dam
low hazard
Suffolk Club Dam
low hazard
Swan Lake Dam
low hazard
Swan Pond Dam
unknown hazard
Town Of Huntington Dam
low hazard
Tremaine Dam
low hazard
Upper Cranberry Marsh Dam
unknown hazard
Upper Lake Dam
low hazard
Upper Mill Pond Dam
low hazard
Upper Winganhauppauge Lake Dam
low hazard
Vail Pond Dam
low hazard
WOODHULL DAM
low hazard
Webster Pond Dam
low hazard
West Brook Pond Dam
low hazard
West Lake Dam
low hazard
West Mill Pond Dam
low hazard
Willow Pond Dam
intermediate hazard
EAP: On File
Next due: January 31, 2027
Sourced from New York's public dam inventory. Claiming a dam here is free — look it up to see its full record. See what New York requires of dam owners.