Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Halifax Halifax	Significant Hazard	30 ft	1921	Gravity	Virginia
Halsey Afterbay Placer	High Hazard	38 ft	1913	Rockfill	California
Halsey Forebay No. 1 Placer	High Hazard	42 ft	1913	Earth	California
Hannawa St. Lawrence	Low Hazard	34 ft	1902	Gravity	New York
Hannibal Locks and Dam Wetzel	Significant Hazard	—	1974	Gravity	West Virginia
Hanover Pond New Haven	High Hazard	25 ft	2006	Concrete	Connecticut
Hardins Gaston	Low Hazard	17 ft	1895	Masonry	North Carolina
Hardwick Lake Caledonia	Significant Hazard	20 ft	1920	Concrete	Vermont
Hardy Newaygo	High Hazard	100 ft	1931	Earth	Michigan
Harriet Lake Clackamas	Low Hazard	68 ft	1923	Arch	Oregon
Harriman Windham	High Hazard	186 ft	1924	Other	Vermont
Harrington Lake Piscataquis	Low Hazard	16 ft	1930	Concrete	Maine
Harrisville Marquette	High Hazard	15 ft	1853	Gravity	Wisconsin
Harrisville Lewis	Low Hazard	25 ft	1905	Concrete	New York
Harrower Lower Dam Montgomery	Significant Hazard	8 ft	1898	Concrete	New York
Harry L. Englebright Dam Yuba	High Hazard	242 ft	1941	Arch	California
Harry S. Truman Dam Benton	High Hazard	98 ft	1978	Rockfill	Missouri
Hart Lake Oceana	Low Hazard	31 ft	1927	Earth	Michigan
Hartwell Dam Hart	High Hazard	155 ft	1962	Concrete	Georgia
Hastings Power Dam Rensselaer	Significant Hazard	22 ft	1920	Concrete	New York
Hat Creek No. 2 Diversion Shasta	Low Hazard	29 ft	1943	Concrete	California
Hatfield Jackson	High Hazard	50 ft	1908	Gravity	Wisconsin
Hatfields Strafford	Significant Hazard	20 ft	1937	Concrete	New Hampshire
Hat Rapids Oneida	High Hazard	30 ft	1923	Gravity	Wisconsin
Hauser Dam Lewis and Clark	High Hazard	125 ft	1911	Gravity	Montana
Hawks Nest Fayette	High Hazard	85 ft	1936	Concrete	West Virginia
Hay Press Park - Dam #1 Mineral	Low Hazard	27 ft	1922	Earth	Colorado
Hay Press Park - Dam #2 Mineral	Low Hazard	8 ft	1922	Earth	Colorado
Hayward Sawyer	Low Hazard	20 ft	1925	Rockfill	Wisconsin
Headworks Diversion Dam Clackamas	Low Hazard	30 ft	1923	Concrete	Oregon
Heald Pond Oxford	Low Hazard	12 ft	1860	Concrete	Maine
Hebgen Dam Gallatin	High Hazard	88 ft	1915	Earth	Montana
Heishmans Mill Cumberland	Low Hazard	10 ft	1815	Concrete	Pennsylvania
Hell Hole Placer	High Hazard	410 ft	1966	Rockfill	California
Hells Canyon Adams	High Hazard	323 ft	1967	Gravity	Idaho
Hemlock Falls Iron	Low Hazard	34 ft	1953	Concrete	Michigan
Henderson Dawson	Low Hazard	19 ft	1941	Earth	Nebraska
Hendricks Head Butte	Low Hazard	15 ft	1907	Rockfill	California
Henry River Dam Burke	High Hazard	—	1902	Concrete	North Carolina
Herkimer Herkimer	Low Hazard	12 ft	1922	Gravity	New York
Herrings Jefferson	Low Hazard	25 ft	1924	Concrete	New York
Heuvelton St. Lawrence	Significant Hazard	19 ft	1923	Concrete	New York
Hewittville St. Lawrence	Low Hazard	18 ft	1870	Concrete	New York
Hicks Crossroad Dike Mecklenburg	High Hazard	30 ft	1963	Earth	North Carolina
Hicks Pond Oxford	Low Hazard	13 ft	1944	Concrete	Maine
Hidden Dam Madera	High Hazard	140 ft	1975	Earth	California
High Dam Oswego	High Hazard	35 ft	1928	Gravity	New York
High Falls Marinette	High Hazard	47 ft	1910	Gravity	Wisconsin
High Falls Ulster	Low Hazard	30 ft	1935	Gravity	New York
High Falls Clinton	High Hazard	63 ft	1917	Concrete	New York