Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
High Falls Dam At Copenhagen Lewis	Significant Hazard	25 ft	1909	Concrete	New York
High Falls - Dike No. 1 Lewis	Low Hazard	10 ft	1925	Earth	New York
Highgate Falls Franklin	Significant Hazard	45 ft	1918	Concrete	Vermont
High Rock Rowan	High Hazard	65 ft	1927	Gravity	North Carolina
High Shoals Gaston	Low Hazard	20 ft	1922	Masonry	North Carolina
High Shoals Upper Dam Walton	Low Hazard	15 ft	1920	Gravity	Georgia
Higley St. Lawrence	High Hazard	37 ft	1925	Gravity	New York
Hiles Canyon Dawson	Low Hazard	25 ft	1941	Earth	Nebraska
Hillman Montmorency	Low Hazard	16 ft	1895	Gravity	Michigan
Hillsborough Mill Hillsborough	Significant Hazard	22 ft	1925	Concrete	New Hampshire
Hills Creek Dam Lane	High Hazard	328 ft	1962	Earth	Oregon
Hillside Inyo	High Hazard	82 ft	1910	Rockfill	California
Hilton Pond Lincoln	Low Hazard	15 ft	1945	Concrete	Maine
Hinckley Herkimer	High Hazard	83 ft	1914	Earth	New York
Hiram Oxford	Low Hazard	30 ft	1917	Concrete	Maine
Hiwassee Dam Cherokee	High Hazard	248 ft	1940	Concrete	North Carolina
H. Neely Henry St. Clair	High Hazard	104 ft	1966	Gravity	Alabama
Hoague - Sprague Merrimack	Significant Hazard	14 ft	1906	Timber Crib	New Hampshire
Hochstein Dam #3 Washington	Low Hazard	45 ft	—	—	Oregon
Hodenpyl Wexford	High Hazard	90 ft	1925	Gravity	Michigan
Hoist Marquette	High Hazard	63 ft	1941	Gravity	Michigan
Holcombe Chippewa	High Hazard	60 ft	1950	Gravity	Wisconsin
Holcomb Rock Amherst	Low Hazard	25 ft	1850	Gravity	Virginia
Hollidays Bridge Dam Greenville	High Hazard	50 ft	1906	—	South Carolina
Hollowbrook Dam Westchester	Significant Hazard	15 ft	1920	Concrete	New York
Hollow Dam St. Lawrence	Significant Hazard	31 ft	1987	Concrete	New York
Hollywood Power Plant Dam Richmond City	Low Hazard	25 ft	—	Gravity	Virginia
Holmes Mill Waldo	Low Hazard	15 ft	1870	Masonry	Maine
Holmesville Power Plant Dam Gage	Low Hazard	22 ft	1910	Buttress	Nebraska
Holter Dam Lewis and Clark	High Hazard	124 ft	1918	Gravity	Montana
Holt Lock and Dam Tuscaloosa	High Hazard	58 ft	1968	Gravity	Alabama
Holtwood Lancaster	Low Hazard	55 ft	1910	Gravity	Pennsylvania
Holyoke Dam Hampshire	Significant Hazard	30 ft	1900	Masonry	Massachusetts
Hooksett Merrimack	Low Hazard	11 ft	1927	Masonry	New Hampshire
Hoosick Falls Dam Rensselaer	Low Hazard	22 ft	1890	Concrete	New York
Hoot Lake Otter Tail	Low Hazard	10 ft	1913	Gravity	Minnesota
Hoover Clark	High Hazard	730 ft	1935	Concrete	Nevada
Hope Providence	Significant Hazard	19 ft	1885	Masonry	Rhode Island
Hopkinton Merrimack	Low Hazard	10 ft	1890	Concrete	New Hampshire
Hopper Pond Bennington	Low Hazard	38 ft	1920	Concrete	Vermont
Horse Mesa Maricopa	High Hazard	305 ft	1926	Concrete	Arizona
Horseshoe Bend Diversion Boise	Low Hazard	8 ft	1995	Other	Idaho
Horseshoe Diversion Dam Butler	Low Hazard	8 ft	1920	Timber Crib	Ohio
Hosler (Reeder Gulch Jackson	High Hazard	114 ft	1928	Concrete	Oregon
Howard Prairie Jackson	High Hazard	100 ft	1957	Earth	Oregon
Howland Penobscot	Low Hazard	17 ft	1916	Concrete	Maine
Hubbard Lake Dam Alpena	Low Hazard	11 ft	1890	Gravity	Michigan
Hubbardston Ionia	Low Hazard	20 ft	1860	—	Michigan
Hudson Falls Saratoga	Significant Hazard	17 ft	1996	Concrete	New York
Humphreys Mineral	High Hazard	85 ft	1923	Concrete	Colorado