Hydroelectric Dams

2,099 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Black Butte Dam Tehama	High Hazard	140 ft	1963	Earth	California
Black Canyon Diversion Gem	High Hazard	183 ft	1923	Concrete	Idaho
Black Eagle Cascade	High Hazard	35 ft	1891	Gravity	Montana
Black River Jefferson	Low Hazard	25 ft	1919	Concrete	New York
Black River Falls Jackson	Low Hazard	18 ft	1912	Gravity	Wisconsin
Blacksmith Fork Cache	Significant Hazard	14 ft	1972	Earth	Utah
Blackstone Worcester	Low Hazard	12 ft	—	—	Rhode Island
Blake St. Lawrence	High Hazard	80 ft	1957	Concrete	New York
Blakely Mountain Dam Garland	High Hazard	226 ft	1953	Earth	Arkansas
Blanchard Morrison	Low Hazard	46 ft	1925	Earth	Minnesota
Bleachery Pond Providence	High Hazard	8 ft	1883	Earth	Rhode Island
Blenheim - Gilboa Lower Schoharie	High Hazard	100 ft	1974	Earth	New York
Blenheim - Gilboa Upper Schoharie	High Hazard	110 ft	1974	Earth	New York
Blewett Falls Anson	High Hazard	54 ft	1912	Concrete	North Carolina
Bliss Gooding	High Hazard	140 ft	1950	Concrete	Idaho
Blue Lake City and Borough of Sitka	High Hazard	294 ft	1961	Arch	Alaska
Blue Lake Nevada	High Hazard	21 ft	1856	Earth	California
Blue Mesa Gunnison	High Hazard	390 ft	1965	Earth	Colorado
Blue Ridge Dam Fannin	High Hazard	175 ft	1930	Earth	Georgia
Bluff Lake Diversion Ketchikan Gateway Borough	Low Hazard	10 ft	1984	Rockfill	Alaska
Boca Nevada	High Hazard	116 ft	1939	Earth	California
Boise Cascade Lower Dam Lewis	Significant Hazard	14 ft	1865	Concrete	New York
Bolton Falls Washington	Low Hazard	75 ft	1898	Timber Crib	Vermont
Bond Falls Main Dam Ontonagon	High Hazard	50 ft	1938	Gravity	Michigan
Bonneville Locks and Dam Multnomah	High Hazard	56 ft	1938	Gravity	Oregon
Bonny Eagle York	Low Hazard	67 ft	1911	Concrete	Maine
Boone Dam Washington	High Hazard	160 ft	1952	Concrete	Tennessee
Boston Felt Strafford	Low Hazard	10 ft	1983	Masonry	New Hampshire
Boulder Lake Dike Cc St. Louis	Low Hazard	20 ft	1919	Earth	Minnesota
Boundary Pend Oreille	High Hazard	340 ft	1967	Concrete	Washington
Bowman Arch Nevada	High Hazard	105 ft	1927	Arch	California
Box Canyon Siskiyou	High Hazard	220 ft	1970	Concrete	California
Box Canyon Pend Oreille	Low Hazard	105 ft	1955	Gravity	Washington
Boxelder Canyon Lincoln	Low Hazard	33 ft	1941	Earth	Nebraska
Boyd'S Millpond Dam Laurens	High Hazard	36 ft	1909	—	South Carolina
Boyne River Charlevoix	Low Hazard	37 ft	1904	Earth	Michigan
Boysen Fremont	High Hazard	220 ft	1951	Earth	Wyoming
Bradbury York	Low Hazard	12 ft	1929	Concrete	Maine
Bradford Orange	Significant Hazard	52 ft	1905	Concrete	Vermont
Bradford Dam Steuben	Low Hazard	13 ft	1950	Earth	New York
Bradley Lake Dam Kenai Peninsula Borough	Low Hazard	125 ft	1991	Rockfill	Alaska
Brainerd Crow Wing	High Hazard	20 ft	1950	Gravity	Minnesota
Branch Lake Hancock	Significant Hazard	15 ft	1911	Rockfill	Maine
Branns Mill Piscataquis	Low Hazard	14 ft	1900	Timber Crib	Maine
Brasfield (Appomattox) Dinwiddie	High Hazard	55 ft	1968	Gravity	Virginia
Brassua Somerset	High Hazard	50 ft	1927	Concrete	Maine
Brewer Lake Penobscot	Low Hazard	14 ft	1900	Timber Crib	Maine
Briar Pipe Merrimack	Low Hazard	17 ft	1936	Masonry	New Hampshire
Brighton Montgomery	High Hazard	82 ft	1943	Buttress	Maryland
Broadwater Dam Broadwater	High Hazard	24 ft	1940	Gravity	Montana