Dams in Connecticut

%!s(int=1225)Total Dams

233High Hazard

937Significant

55Low Hazard

Dam Safety in Connecticut

Connecticut has 1,225 dams tracked in the National Inventory of Dams. Of these, 233 (19%) are classified as high hazard — meaning failure would probably cause loss of human life — and 937 are classified as significant hazard. Currently, 126 dams in the state have a condition assessment of poor or unsatisfactory, indicating recognized safety deficiencies.

The average dam in Connecticut is 114 years old. Many of these aging structures were built before modern dam safety standards were established, which increases the importance of regular inspections and maintenance. The most common purpose for dams in Connecticut is recreation, accounting for 823 of the state's dams.

Use the search above to find dams near any address in Connecticut, or browse by county below. Each dam listing includes its hazard potential classification, condition assessment, physical characteristics, and inspection history from the NID.

Connecticut Dam Facts

Total Dams	1,225
High Hazard Dams	233
Average Dam Age	114 years
Tallest Dam	178 ft
Largest Reservoir	172,000 acre-ft
Poor/Unsatisfactory Condition	126

Notable Dams in Connecticut

Mad River Flood Control Dam178 ftHigh Shepaug138 ftHigh Saville Dam137 ftHigh Thomaston Dam137 ftHigh Black Rock Dam130 ftHigh

Counties in Connecticut

3 dams Fairfield209 dams44 high hazard Hartford154 dams43 high hazard Litchfield202 dams38 high hazard Middlesex119 dams17 high hazard New Haven198 dams48 high hazard New London130 dams18 high hazard Tolland106 dams16 high hazard Windham104 dams9 high hazard

High Hazard Dams in Connecticut

Dam	County	Height	Condition	Purpose
Mad River Flood Control Dam	Litchfield	178 ft	Satisfactory	Flood Risk Reduction
Shepaug	New Haven	138 ft	Satisfactory	Hydroelectric
Saville Dam	Litchfield	137 ft	Satisfactory	Water Supply
Thomaston Dam	Litchfield	137 ft	Not Available	Flood Risk Reduction
Black Rock Dam	Litchfield	130 ft	Not Available	Flood Risk Reduction
Goodwin	Hartford	125 ft	Satisfactory	Hydroelectric
Easton Reservoir Dam	Fairfield	123 ft	Fair	Water Supply
Lake Gaillard Dam	New Haven	118 ft	Satisfactory	Water Supply
Lake Watrous Dam	New Haven	116 ft	Satisfactory	Water Supply
Northfield Brook Dam	Litchfield	111 ft	Not Available	Flood Risk Reduction
John D. Milne Lake Dam	Fairfield	105 ft	Fair	Water Supply
Stevenson	Fairfield	103 ft	Satisfactory	Hydroelectric
Lake Chamberlain Dam	New Haven	93 ft	Satisfactory	Water Supply
East Branch Flood Control Dam	Litchfield	92 ft	Satisfactory	Flood Risk Reduction
Upper Shepaug Dam	Litchfield	90 ft	Satisfactory	Water Supply
Pitch Reservoir Dam	Litchfield	85 ft	Satisfactory	Water Supply
Whiting River Flood Control Dam	Litchfield	80 ft	Satisfactory	Flood Risk Reduction
Reuben Hart Reservoir Dam	Litchfield	80 ft	Satisfactory	Water Supply
Long Hill Reservoir Dam	New Haven	80 ft	Satisfactory	Water Supply
Mansfield Hollow Dam - Dike C	Tolland	78 ft	Not Available	Flood Risk Reduction
Hemlock Reservoir Dam	Fairfield	75 ft	Fair	Water Supply
Samuel Bargh Reservoir Dam	Fairfield	75 ft	Satisfactory	Water Supply
Hall Meadow Brook Flood Control Dam	Litchfield	75 ft	Satisfactory	Flood Risk Reduction
Compensating Reservoir Dam	Litchfield	75 ft	Fair	Water Supply
Lake Glen Dam	New Haven	72 ft	Satisfactory	Water Supply
Morris Reservoir Dam	Litchfield	70 ft	Satisfactory	Water Supply
Sucker Brook Flood Control Dam	Litchfield	68 ft	Satisfactory	Flood Risk Reduction
Mulberry Reservoir Dam	New Haven	66 ft	Satisfactory	Water Supply
Lake Bethany Dam	New Haven	66 ft	Satisfactory	Water Supply
Shepaug Reservoir Dam	Litchfield	65 ft	Satisfactory	Water Supply
Hammonasset Dam	New Haven	63 ft	Satisfactory	Water Supply
Deep River Reservoir Dam	New London	62 ft	Satisfactory	Water Supply
Menunkatuck Reservoir Dam	New Haven	61 ft	Satisfactory	Water Supply
Bristol Reservoir #5 Dam	Litchfield	60 ft	Satisfactory	Water Supply
Lake Dawson Dam	New Haven	60 ft	Satisfactory	Water Supply
Whigville Reservoir Dam	Hartford	58 ft	Satisfactory	Water Supply
Nepaug East Dike	Hartford	57 ft	Satisfactory	Water Supply
Moody Reservoir Dam	New Haven	56 ft	Satisfactory	Water Supply
Means Brook Reservoir Dam	Fairfield	54 ft	Satisfactory	Water Supply
Colebrook River Dam - Saddle Dike	Litchfield	54 ft	Not Available	Flood Risk Reduction
American Can Company Dam	Fairfield	53 ft	Satisfactory	Recreation
Whitney Flood Control Site #1 Dam	Tolland	52 ft	Satisfactory	Flood Risk Reduction
Hancock Brook Dam - Railroad Dike	Litchfield	51 ft	Not Available	Flood Risk Reduction
Laurel Reservoir Dam	Fairfield	50 ft	Satisfactory	Water Supply
Wasel Reservoir Dike	Hartford	50 ft	Satisfactory	Water Supply
Crystal Lake Dam	Middlesex	50 ft	Poor	Recreation
Higganum Reservoir Dam	Middlesex	48 ft	Fair	Recreation
Trap Falls Reservoir Dam	Fairfield	48 ft	Fair	Water Supply
Shuttle Meadow Reservoir Dam	Hartford	48 ft	Satisfactory	Water Supply
East Lake Reservoir Dam	Fairfield	47 ft	Satisfactory	Water Supply
Beaver Dam Lake Dam	Fairfield	47 ft	Satisfactory	Recreation
Killingworth Reservoir Dam	Middlesex	46 ft	Satisfactory	Water Supply
Hartford Reservoir #1 Dam	Hartford	46 ft	Poor	Water Supply
Hallmere Reservoir Dam	Hartford	45 ft	Satisfactory	Water Supply
Middle Lanesville Dike	Litchfield	45 ft	Satisfactory	Hydroelectric
Pemberwick Dam	Fairfield	44 ft	Fair	Recreation
Howard Reservoir Dam	Hartford	44 ft	Satisfactory	Water Supply
Lake Whitney Dam	New Haven	44 ft	Poor	Water Supply
New Canaan Reservoir Dam	Fairfield	44 ft	Satisfactory	Water Supply
Rainbow Reservoir Dam	Hartford	43 ft	Satisfactory	Hydroelectric
South Meadows Dike	Hartford	43 ft	Not Rated	Flood Risk Reduction
Norfolk Brook Flood Control Dam #6	Litchfield	43 ft	Satisfactory	Flood Risk Reduction
West Lake Reservoir Dam	Fairfield	42 ft	Satisfactory	Water Supply
Great Hill Reservior Dam	New Haven	41 ft	Poor	Recreation
Peat Swamp Reservoir Dam	New Haven	41 ft	Poor	Water Supply
Taftville Hydro Dam #4	New London	41 ft	Satisfactory	Hydroelectric
Broad Brook Reservoir Dam	New Haven	40 ft	Fair	Water Supply
North Stamford Reservoir Dam	Fairfield	40 ft	Fair	Water Supply
Goss Brook Dam	Windham	39 ft	Satisfactory	Recreation
Kenmere Reservoir Dam	Hartford	38 ft	Satisfactory	Water Supply
Belleview Lake Dam	New Haven	38 ft	Satisfactory	Recreation
Ellis Flood Control Site #2 Dam	Tolland	38 ft	Satisfactory	Flood Risk Reduction
Burnt Hill Flood Control Dam	Hartford	38 ft	Satisfactory	Flood Risk Reduction
Hockanum Reservoir Dam	Tolland	37 ft	Fair	Recreation
Chestnut Hill Reservoir Dam	New Haven	37 ft	Fair	Recreation
American Felt Dam	Fairfield	37 ft	Satisfactory	Recreation
Maltby No. 1 Dam	New Haven	37 ft	Satisfactory	Water Supply
Popps Mountain Dike	Fairfield	36 ft	Satisfactory	Water Supply
Pomeroy Flood Control Site #3 Dam	Tolland	36 ft	Fair	Flood Risk Reduction
Putnam Reservoir Dam	Fairfield	35 ft	Satisfactory	Water Supply
East Mountain Reservoir Dam	New Haven	35 ft	Satisfactory	Recreation
Mystic Reservoir Dam	New London	34 ft	Satisfactory	Water Supply
Stillwater Pond Dam	Litchfield	34 ft	Satisfactory	Recreation
Woodridge Lake Dam	Litchfield	34 ft	Satisfactory	Recreation
Bronson E. Lockwood Dam	Litchfield	34 ft	Satisfactory	Water Supply
Lake Saltonstall Dam	New Haven	34 ft	Satisfactory	Water Supply
Bunnells Pond Dam	Fairfield	33 ft	Fair	Recreation
Union Pond Dam	Hartford	33 ft	Fair	Recreation
Bushy Hill Pond Dam	Middlesex	33 ft	Satisfactory	Water Supply
Canoe Brook Lake Dam	Fairfield	33 ft	Satisfactory	Recreation
Hop Brook Dam - Saddle Dike	New Haven	33 ft	Not Available	Flood Risk Reduction
Scoville Reservoir Dam	New Haven	32 ft	Satisfactory	Recreation
Hartford Reservoir #2 Dam	Hartford	32 ft	Satisfactory	Water Supply
Lake Wintergreen Dam	New Haven	31 ft	Satisfactory	Water Supply
Mad River Dam Homestead Avenue Dam	New Haven	31 ft	Poor	Water Supply
Mianus Filter Plant Dam	Fairfield	31 ft	Fair	Water Supply
Lake Harwinton Dam	Litchfield	30 ft	Satisfactory	Recreation
Old Marsh Pond Dam	Litchfield	30 ft	Satisfactory	Water Supply
Staffordville Reservoir Dam	Tolland	30 ft	Satisfactory	Recreation
Upper Kohanza Lake Dam	Fairfield	30 ft	Satisfactory	Water Supply