Browse Dams

13,002 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 13,002 dams from the NID database. Each record includes dam name, location, physical dimensions, hazard potential classification, condition assessment, purpose, owner information, and emergency action plan status. Use the filters below to search by state, hazard level, condition, or keyword.

Clear

Name	State	County	Height (ft)	Hazard	Condition	Year	Purpose
New Bullards Bar	California	Yuba	645	High	Satisfactory	1970	Hydroelectric
Don Pedro Main	California	Tuolumne	585	High	Satisfactory	1971	Hydroelectric
Yankee Doodle Tailings Dam	Montana	Silver Bow	570	High	Satisfactory	1972	Other
Seven Oaks	California	San Bernardino	550	High	Satisfactory	1999	Flood Risk Reduction
Ross	Washington	Whatcom	540	High	Satisfactory	1949	Hydroelectric
Union Valley	California	El Dorado	455	High	Satisfactory	1962	Hydroelectric
Mammoth Pool	California	Madera	411	High	Satisfactory	1960	Hydroelectric
Harmar Refuse Bank	Pennsylvania	Allegheny	410	High	Satisfactory	1957	Other
Diablo	Washington	Whatcom	389	High	Satisfactory	1929	Hydroelectric
Jocassee	South Carolina	Pickens	385	High	Satisfactory	1973	Hydroelectric
San Gabriel	California	Los Angeles	381	High	Satisfactory	1937	Hydroelectric
Cumberland No. 1 Slurry Pond 1	Pennsylvania	Greene	380	High	Satisfactory	1984	Other
Grizzly Gulch Tailings Dam	South Dakota	Lawrence	380	High	Satisfactory	1998	Tailings
Cumberland No. 2 Slurry Pond	Pennsylvania	Greene	370	High	Satisfactory	—	Other
Pacoima	California	Los Angeles	365	High	Satisfactory	1929	Flood Risk Reduction
Bad Creek Main Dam	South Carolina	Oconee	360	High	Satisfactory	1991	Hydroelectric
Asamera Cannon Mine Tailings Dam	Washington	Chelan	340	High	Satisfactory	1986	Flood Risk Reduction
Tennessee Consolidated Coal #1 Dam	Tennessee	Marion	340	Low	Satisfactory	1976
San Vicente	California	San Diego	338	High	Satisfactory	1943	Other
Bailey Mine Area No. 3 Slurry	Pennsylvania	Greene	337	High	Satisfactory	2014	Other
Alder	Washington	Pierce	330	High	Satisfactory	1945	Hydroelectric
Hells Canyon	Idaho	Adams	330	High	Satisfactory	1967	Hydroelectric
Salt Springs	California	Calaveras	328	High	Satisfactory	1931	Hydroelectric
Cerrillos Dam	Puerto Rico	Ponce	323	High	Satisfactory	1992	Flood Risk Reduction
Donnells	California	Tuolumne	317	High	Satisfactory	1958	Hydroelectric
Bailey Mine Slurry Impoundment	Pennsylvania	Greene	315	High	Satisfactory	1984	Other
Courtright	California	Fresno	315	High	Satisfactory	1958	Hydroelectric
O`Shaughnessy	California	Tuolumne	312	High	Satisfactory	1923	Water Supply
Cobre Main Tailings Dam	New Mexico	Grant	310	High	Satisfactory	1968	Tailings
Dillon	Colorado	Summit	310	High	Satisfactory	1963	Water Supply
Emerald No. 1 Main Valley Eastern	Pennsylvania	Greene	310	High	Satisfactory	—	Other
Dillon	Colorado	Summit	310	High	Satisfactory	1963	Water Supply
Olivenhain	California	San Diego	309	High	Satisfactory	2003	Water Supply
Lewis Smith	Alabama	Walker	300	High	Satisfactory	1961	Hydroelectric
Gorge	Washington	Whatcom	300	High	Satisfactory	1961	Hydroelectric
Sly Creek	California	Butte	299	High	Satisfactory	1961	Hydroelectric
Strontia Springs	Colorado	Douglas	299	High	Satisfactory	1982	Water Supply
Blue Lake	Alaska	City and Borough of Sitka	294	High	Satisfactory	1961	Hydroelectric
Dix River Dam	Kentucky	Mercer	287	High	Satisfactory	1925	Hydroelectric
Diamond Valley Lake	California	Riverside	284	High	Satisfactory	2000	Water Supply
Questa Tailings Dam 1	New Mexico	Taos	280	High	Satisfactory	1980	Tailings
Merrill Creek Main Dam	New Jersey	Warren	280	High	Satisfactory	1988	Other
Mansfield Dam	Texas	Travis	278	High	Satisfactory	1942	Flood Risk Reduction
Cushman No 2	Washington	Mason	275	High	Satisfactory	1930	Hydroelectric
Briones	California	Contra Costa	273	High	Satisfactory	1964	Other
Emerald No. 2 Main Valley Eastern	Pennsylvania	Greene	270	High	Satisfactory	—	Other
Conner Run Refuse Impoundment	West Virginia	Marshall	267	High	Satisfactory	1976	Tailings
Cogswell	California	Los Angeles	266	High	Satisfactory	1935	Flood Risk Reduction
Homestake Project	Colorado	Eagle	265	High	Satisfactory	1967	Water Supply
New Spicer Meadow	California	Tuolumne	265	High	Satisfactory	1989	Hydroelectric

Frequently Asked Questions

Hazard potential is based on the consequences of dam failure, not the condition of the dam. High hazard means loss of human life is probable. Significant means economic and environmental losses are expected but no probable loss of life. Low means minimal losses are expected. The classification considers downstream population, infrastructure, and environmental resources.

Condition ratings reflect the physical state of the dam based on periodic inspections. Satisfactory means no deficiencies found. Fair means minor issues exist but no immediate action needed. Poor means safety deficiencies require remedial action. Unsatisfactory means the dam is unsafe and immediate corrective action is required.

Yes. Use the search field above to find dams by name. You can also combine the search with state, hazard, and condition filters to narrow your results. Each dam record links to a detail page with complete information.