High Hazard Dams
Loss of human life is likely if the dam fails.
| Dam Name | Hazard | Height | Built | Type | State |
|---|---|---|---|---|---|
| Barbee Dam Wake | High Hazard | — | — | Earth | North Carolina |
| Barber Creek WS Str # 25 Barrow | High Hazard | 29 ft | 1960 | Earth | Georgia |
| Barber Lake Dam Henry | High Hazard | 25 ft | 1970 | Earth | Missouri |
| Barber Lake Dam Jackson | High Hazard | 57 ft | 1978 | Earth | Missouri |
| Barber Motorsports Lake Jefferson | High Hazard | 35 ft | — | — | Alabama |
| Barber Pond Dam Hartford | High Hazard | 11 ft | 1955 | Earth | Connecticut |
| Barber Reservoir Dam Mitchell | High Hazard | 51 ft | 1968 | Earth | Texas |
| Barber State Fishing Lake Barber | High Hazard | 38 ft | 1954 | Earth | Kansas |
| Barcroft Dam Fairfax | High Hazard | 69 ft | — | Gravity | Virginia |
| Bardwell Dam Ellis | High Hazard | 82 ft | 1965 | Earth | Texas |
| Bark Camp Dam Scott | High Hazard | 35 ft | — | Earth | Virginia |
| Barker Dam Harris | High Hazard | 37 ft | 1945 | Gravity | Texas |
| Barker-Frazier Dam Guilford | High Hazard | — | — | Earth | North Carolina |
| Barker Lake Dam Jasper | High Hazard | 15 ft | — | Earth | Missouri |
| Barker Meadow Boulder | High Hazard | 177 ft | 1909 | Concrete | Colorado |
| Barkers Pond Dam Allendale | High Hazard | 18 ft | 1955 | — | South Carolina |
| Barkley Lock and Dam Lyon | High Hazard | — | 1966 | Gravity | Kentucky |
| Barlond Dairy Lagoon Snohomish | High Hazard | — | 1990 | Earth | Washington |
| Barnegat Lake Dam Ocean | High Hazard | 18 ft | 1937 | Earth | New Jersey |
| Barnes Butte Crook | High Hazard | 28 ft | 1956 | Earth | Oregon |
| Barnes Meadow Larimer | High Hazard | 47 ft | 1923 | Earth | Colorado |
| Barneston (Pa 432) Chester | High Hazard | 43 ft | 1983 | Earth | Pennsylvania |
| Barnesville Lake Dam Belmont | High Hazard | 32 ft | 1969 | Earth | Ohio |
| Barnesville Reservoir No. 1 Dam Belmont | High Hazard | 42 ft | 1904 | Earth | Ohio |
| Barnesville Reservoir No. 2 Dam Belmont | High Hazard | 48 ft | 1936 | Earth | Ohio |
| Barnesville Reservoir No. 3 Dam Belmont | High Hazard | 77 ft | 1965 | Earth | Ohio |
| Barnett Lancaster | High Hazard | 26 ft | — | Earth | Pennsylvania |
| Barnetts Pond Dam Sumter | High Hazard | 16 ft | 1955 | — | South Carolina |
| Barney Washington | High Hazard | 122 ft | 1998 | Other | Oregon |
| Barney Pond Providence | High Hazard | 19 ft | 1885 | Masonry | Rhode Island |
| Barnstead Parade Dam Belknap | High Hazard | 16 ft | 1830 | Concrete | New Hampshire |
| Barnwell St Park Lwr Dam Barnwell | High Hazard | 20 ft | 1950 | — | South Carolina |
| Barnwell St Park Upr Dam Barnwell | High Hazard | 9 ft | — | — | South Carolina |
| Barrackville #1 Cr Dam | High Hazard | — | — | Other | West Virginia |
| Barre Falls Dam Worcester | High Hazard | 69 ft | 1958 | Rockfill | Massachusetts |
| Barren Delta | High Hazard | 16 ft | 1886 | Earth | Colorado |
| Barren River Dam Allen | High Hazard | — | 1964 | Earth | Kentucky |
| Barrenshe Branch Cr Dam | High Hazard | — | — | Other | West Virginia |
| Barre Reservoir Dam Worcester | High Hazard | 15 ft | 1932 | Earth | Massachusetts |
| Barrett San Diego | High Hazard | 161 ft | 1922 | Gravity | California |
| Barrick Goldstrike Tsf 3 Dam Eureka | High Hazard | 200 ft | 2016 | Earth | Nevada |
| Barrington Dam Henrico | High Hazard | 17 ft | — | Earth | Virginia |
| Barr Lake Adams | High Hazard | 42 ft | 1893 | Earth | Colorado |
| Barr Lake Dam Lexington | High Hazard | 11 ft | 1900 | — | South Carolina |
| Barron Lake Coffee | High Hazard | 22 ft | — | Earth | Alabama |
| Barr Road Dam Cabarrus | High Hazard | — | — | Other | North Carolina |
| Barth Lake Dam Caldwell | High Hazard | 19 ft | 1973 | Earth | Texas |
| Bartholomew Park Dam Travis | High Hazard | 21 ft | 1997 | Earth | Texas |
| Bartlett Maricopa | High Hazard | 309 ft | 1938 | Buttress | Arizona |
| Bartletts Ferry, Main Dam Harris | High Hazard | 150 ft | 1926 | Gravity | Georgia |