Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Grace Dike Caribou	Significant Hazard	10 ft	—	Earth	Idaho
Graham Lake Dam Hancock	High Hazard	43 ft	1924	Concrete	Maine
Graham Lake Flood Control Hancock	High Hazard	58 ft	1994	Concrete	Maine
Granby Oswego	Significant Hazard	15 ft	1926	Masonry	New York
Granby Dike 1 Grand	High Hazard	98 ft	1950	Earth	Colorado
Grand Falls Canal Washington	High Hazard	30 ft	1915	Concrete	Maine
Grandfather Falls Lincoln	High Hazard	32 ft	1906	Gravity	Wisconsin
Grand Lake (Matagamon) Penobscot	High Hazard	25 ft	1941	Concrete	Maine
Grandmother Lincoln	High Hazard	39 ft	1923	Gravity	Wisconsin
Grand Rapids Marinette	High Hazard	24 ft	1909	Gravity	Michigan
Grand Rapids Itasca	Significant Hazard	21 ft	1916	Gravity	Minnesota
Grand Rapids Marinette	High Hazard	40 ft	1909	Gravity	Wisconsin
Granite Falls Chippewa	Low Hazard	21 ft	1911	Gravity	Minnesota
Great Averill Pond Essex	Low Hazard	9 ft	1918	Earth	Vermont
Great Brook Lincoln	Significant Hazard	18 ft	1962	Timber Crib	Maine
Great Falls Caledonia	Low Hazard	32 ft	1915	Concrete	Vermont
Great Falls Passaic	Low Hazard	12 ft	1840	Masonry	New Jersey
Great Falls Dam White	High Hazard	82 ft	1916	Concrete	Tennessee
Great Falls-Dearborn Dam Chester	High Hazard	113 ft	1923	Gravity	South Carolina
Great Stone Essex	Low Hazard	38 ft	1848	Masonry	Massachusetts
Greene Mill Dam Butler	Low Hazard	11 ft	1925	Gravity	Iowa
Green Lake Clear Creek	Significant Hazard	8 ft	1914	Rockfill	Colorado
Green Lake City and Borough of Sitka	Low Hazard	210 ft	1982	Arch	Alaska
Green Lake Hancock	Low Hazard	8 ft	1911	Masonry	Maine
Green Mountain Summit	High Hazard	309 ft	1942	Earth	Colorado
Green Peter Dam Linn	High Hazard	320 ft	1967	Gravity	Oregon
Green River Dam Lamoille	High Hazard	105 ft	1947	Arch	Vermont
Green River Reservoir Dike Lamoille	Significant Hazard	23 ft	1947	Earth	Vermont
Greenup Locks and Dam Greenup	Significant Hazard	—	1962	Concrete	Kentucky
Greenville New London	Low Hazard	15 ft	1888	Timber Crib	Connecticut
Greers Ferry Dam Cleburne	High Hazard	243 ft	1962	Concrete	Arkansas
Gregg Falls Hillsborough	High Hazard	66 ft	1917	Concrete	New Hampshire
Gristmill Pond Penobscot	Low Hazard	15 ft	1978	Concrete	Maine
Grist Mill Pond Dam Grafton	High Hazard	16 ft	1924	Concrete	New Hampshire
Grizzly Forebay Plumas	High Hazard	98 ft	1928	Concrete	California
Gross Boulder	High Hazard	340 ft	1955	Concrete	Colorado
Groveville Dutchess	High Hazard	37 ft	1875	Gravity	New York
Guajataca Dam Quebradillas	High Hazard	120 ft	1927	Earth	Puerto Rico
Guayo Dam Lares	High Hazard	190 ft	1956	Gravity	Puerto Rico
Guernsey Platte	High Hazard	135 ft	1926	Earth	Wyoming
Guineo Dam Ciales	High Hazard	115 ft	1931	Rockfill	Puerto Rico
Gulf Island Androscoggin	High Hazard	99 ft	1926	Concrete	Maine
Guntersville Dam Marshall	High Hazard	78 ft	1939	Concrete	Alabama
Habersham Mill (Lower Dam) Habersham	Low Hazard	14 ft	1948	Concrete	Georgia
Habersham Mills Lake Dam Habersham	High Hazard	40 ft	1947	Gravity	Georgia
Hackett Mills Androscoggin	Low Hazard	8 ft	1986	Timber Crib	Maine
Hadley Falls Hillsborough	Significant Hazard	20 ft	1922	Concrete	New Hampshire
Hailesboro #4 Plant Dam St. Lawrence	Significant Hazard	12 ft	1912	Concrete	New York
Hailesboro Mill #6 Dam St. Lawrence	Significant Hazard	14 ft	—	Concrete	New York
Hailsboro Mill #3 Dam St. Lawrence	Significant Hazard	16 ft	1910	Buttress	New York