Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Middlebury Lower Addison	Low Hazard	15 ft	1917	Concrete	Vermont
Middle Dam Oxford	High Hazard	22 ft	1883	Rockfill	Maine
Middle Falls Washington	Low Hazard	12 ft	1915	Concrete	New York
Middle Fork Interbay Placer	Low Hazard	70 ft	1966	Concrete	California
Middle Greenwich Dam Washington	Significant Hazard	10 ft	1902	Concrete	New York
Middle Lindsey Nevada	Low Hazard	8 ft	1870	Earth	California
Middle Range Pond Androscoggin	Low Hazard	10 ft	1975	Earth	Maine
Middlesex No. 2 Washington	High Hazard	51 ft	1928	Gravity	Vermont
Middle Snell Lincoln	Low Hazard	25 ft	1941	Earth	Nebraska
Middleville Barry	Low Hazard	15 ft	1940	Gravity	Michigan
Milford Penobscot	Low Hazard	34 ft	1906	Concrete	Maine
Mill C Clinton	Significant Hazard	43 ft	1922	Masonry	New York
Millers Ferry Lock and Dam Wilcox	Significant Hazard	—	1970	Gravity	Alabama
Millersville Dam Alexander	Low Hazard	—	—	Gravity	North Carolina
Millinocket Lake Penobscot	High Hazard	20 ft	1910	Concrete	Maine
Millinocket Lake Piscataquis	Low Hazard	11 ft	1943	Timber Crib	Maine
Mill Pond Androscoggin	Low Hazard	20 ft	1720	Concrete	Maine
Mill Pond Wayne	Significant Hazard	10 ft	1917	Earth	Pennsylvania
Mill Pond Cumberland	Low Hazard	10 ft	1860	Concrete	Maine
Mill Pond Franklin	Low Hazard	8 ft	1860	Concrete	Maine
Millpond Dam Middlesex	Significant Hazard	20 ft	1890	Gravity	Massachusetts
Mill Pond Dam Columbia	Significant Hazard	10 ft	1890	Masonry	New York
Mills Mills Dam Allegany	Low Hazard	12 ft	1930	Concrete	New York
Mill Stream Somerset	Low Hazard	27 ft	1900	Stone	Maine
Mill Street Dam Cayuga	High Hazard	25 ft	1800	Concrete	New York
Millville Jefferson	Low Hazard	12 ft	1905	Masonry	West Virginia
Milner Dam-Middle Twin Falls	High Hazard	80 ft	1905	Rockfill	Idaho
Milo Piscataquis	Low Hazard	8 ft	1881	Timber Crib	Maine
Milstead Rockdale	Low Hazard	17 ft	1925	Gravity	Georgia
Milton Chittenden	Low Hazard	25 ft	1929	Concrete	Vermont
Milton South Nevada	Low Hazard	30 ft	1927	Arch	California
Mine Falls Hillsborough	Low Hazard	16 ft	1889	Masonry	New Hampshire
Miner'S Ranch Butte	High Hazard	55 ft	1962	Earth	California
Minetto Lock & Dam 5 Oswego	High Hazard	23 ft	1915	Concrete	New York
Minidoka South Dike Cassia	High Hazard	21 ft	1906	Rockfill	Idaho
Minnewawa Cheshire	High Hazard	63 ft	1923	Concrete	New Hampshire
Minocqua Oneida	Low Hazard	9 ft	1909	Gravity	Wisconsin
Minong Flowage Washburn	High Hazard	29 ft	1936	Gravity	Wisconsin
Mio Oscoda	High Hazard	38 ft	1917	Gravity	Michigan
Mission Clay	High Hazard	50 ft	1924	Buttress	North Carolina
Mississippi River Lock and Dam 19 Lee	Significant Hazard	—	1913	Concrete	Illinois
Mississippi River Locks and Dam 15 Scott	Significant Hazard	—	1934	Concrete	Iowa
Mitchell Chilton	High Hazard	106 ft	1923	Gravity	Alabama
Mitchell Mill Dam Mitchell	Low Hazard	19 ft	1925	Buttress	Iowa
Mix Eaton	Low Hazard	7 ft	1910	Gravity	Michigan
Moccasin Lower Tuolumne	High Hazard	60 ft	1930	Earth	California
Mohawk Papers - West Dam Saratoga	Low Hazard	9 ft	1962	Concrete	New York
Moline Power Rock Island	Low Hazard	31 ft	1896	Concrete	Illinois
Monadnock Hillsborough	Low Hazard	22 ft	1923	Concrete	New Hampshire
Mongaup Sullivan	High Hazard	45 ft	1925	Gravity	New York