Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Gantt Covington	High Hazard	35 ft	1924	Buttress	Alabama
Gardner Brook Oxford	Low Hazard	21 ft	1986	Concrete	Maine
Gardners Falls Franklin	Low Hazard	37 ft	1904	Concrete	Massachusetts
Garrison Dam Mercer	High Hazard	—	1953	Earth	North Dakota
Garvins Falls Merrimack	Low Hazard	18 ft	1901	Masonry	New Hampshire
Garzas Dam Adjuntas	High Hazard	201 ft	1943	Earth	Puerto Rico
Gasburg Creek Dike Tuolumne	High Hazard	75 ft	1971	Earth	California
Gaston Northampton	High Hazard	99 ft	1963	Concrete	North Carolina
Gaston - North Saddle Northampton	High Hazard	14 ft	1963	Rockfill	North Carolina
Gaston Shoals Lower Cherokee	Significant Hazard	62 ft	1908	Concrete	South Carolina
Gavins Point Dam Cedar	High Hazard	—	1958	Earth	South Dakota
Gem Lake Mono	High Hazard	80 ft	1917	Concrete	California
Gem State Bonneville	High Hazard	40 ft	1988	Concrete	Idaho
Gem State Left Dike Bonneville	High Hazard	30 ft	1988	Earth	Idaho
Gem State Right Dike Bonneville	High Hazard	30 ft	1988	Earth	Idaho
Georgetown Dam Deer Lodge	High Hazard	55 ft	1900	—	Montana
Georgetown Forebay Clear Creek	Low Hazard	21 ft	1902	Rockfill	Colorado
Gerle Creek El Dorado	Low Hazard	65 ft	1962	Concrete	California
Gibbons Creek Dam Grimes	High Hazard	50 ft	1981	Earth	Texas
Giles Pond Merrimack	Low Hazard	18 ft	1904	Masonry	New Hampshire
Gill Franklin	Low Hazard	65 ft	1970	Concrete	Massachusetts
Gilman Coos	Low Hazard	38 ft	1898	Concrete	New Hampshire
Gilman Falls Penobscot	Low Hazard	8 ft	1906	Concrete	Maine
Gilman Mill Penobscot	Low Hazard	15 ft	1963	Concrete	Maine
Gilman Stream Somerset	Low Hazard	17 ft	1911	Other	Maine
Glen Rutland	Low Hazard	31 ft	1920	Concrete	Vermont
Glen Canyon Coconino	High Hazard	710 ft	1963	Concrete	Arizona
Glendale Berkshire	Low Hazard	30 ft	1906	Gravity	Massachusetts
Glendo Platte	High Hazard	—	1958	Earth	Wyoming
Glendo Dike No. 1 Platte	High Hazard	20 ft	1957	Earth	Wyoming
Glendo Dike No. 2 Platte	High Hazard	45 ft	1958	Earth	Wyoming
Glendo Dike No. 3 Platte	High Hazard	75 ft	1958	Earth	Wyoming
Glen Ferris Fayette	Low Hazard	12 ft	1901	Concrete	West Virginia
Glen Raven Altamahaw Dam Alamance	Low Hazard	—	—	Masonry	North Carolina
Glen Road Grafton	Significant Hazard	17 ft	1988	Concrete	New Hampshire
Glens Falls Warren	Significant Hazard	16 ft	1916	Concrete	New York
Glenville Saddle Dike Jackson	High Hazard	25 ft	1941	Rockfill	North Carolina
Glenwood Lake Dam Orleans	High Hazard	31 ft	1903	Earth	New York
Glen Young Dawson	Low Hazard	53 ft	1941	Earth	Nebraska
Goat Rock Harris	High Hazard	69 ft	1912	Gravity	Georgia
Golden Lotus Dam Otsego	Low Hazard	22 ft	1955	Earth	Michigan
Gonzales Gonzales	Significant Hazard	15 ft	1925	Gravity	Texas
Goodrich Falls Dam Carroll	Low Hazard	25 ft	1935	Concrete	New Hampshire
Goodwin Hartford	High Hazard	125 ft	1960	Earth	Connecticut
Gorge Whatcom	High Hazard	300 ft	1961	Concrete	Washington
Gorge No. 18 Chittenden	Low Hazard	46 ft	1914	Concrete	Vermont
Gorham Coos	Low Hazard	24 ft	1904	Timber Crib	New Hampshire
Gorham Coos	Low Hazard	20 ft	1958	Timber Crib	New Hampshire
Gouldtown - Mill 5 East Channel Lewis	Low Hazard	10 ft	1991	Concrete	New York
Gouverneur St. Lawrence	Significant Hazard	7 ft	1925	Concrete	New York