High Hazard Dams
Loss of human life is likely if the dam fails.
| Dam Name | Hazard | Height | Built | Type | State |
|---|---|---|---|---|---|
| Brushy Creek WCD Dam-Tripp 18 Anderson | High Hazard | 45 ft | 1961 | — | South Carolina |
| Brushy Fork Impoundment Greenbrier | High Hazard | 605 ft | 1996 | Other | West Virginia |
| Brushy Fork Slurry Dam Knott | High Hazard | 332 ft | — | Earth | Kentucky |
| Brushy Mountain Morgan | High Hazard | — | 1949 | Earth | Tennessee |
| Bryan Lake Dam Muhlenberg | High Hazard | 35 ft | — | Earth | Kentucky |
| Bryant Cocke | High Hazard | — | 1987 | Earth | Tennessee |
| Bryant Creek Lake Dam Monroe | High Hazard | 27 ft | 1940 | Earth | Indiana |
| Bryant Mill Dam Kalamazoo | High Hazard | 17 ft | 1946 | Earth | Michigan |
| Bryant Pond Aroostook | High Hazard | 45 ft | 1964 | Earth | Maine |
| Bryan Utilities Lake Dam Brazos | High Hazard | 59 ft | 1975 | Earth | Texas |
| Brye Lake Dam Medina | High Hazard | 12 ft | 1988 | Earth | Ohio |
| Bryson Swain | High Hazard | 45 ft | 1925 | Multi-Arch | North Carolina |
| Bryson City Water Supply Dam Swain | High Hazard | — | 1977 | Earth | North Carolina |
| Btmua Reservoir Dam Ocean | High Hazard | 20 ft | — | Earth | New Jersey |
| Bubbling Springs Dam Dent | High Hazard | 23 ft | 1952 | Earth | Missouri |
| Buccaneer Lake Dam Walton | High Hazard | 38 ft | 1958 | Earth | Georgia |
| Buchanan Berrien | High Hazard | 23 ft | 1895 | Gravity | Michigan |
| Buchanan Dam Burnet | High Hazard | 146 ft | 1937 | Earth | Texas |
| Buchanan Dam Madera | High Hazard | 179 ft | 1975 | Rockfill | California |
| Buche (Clackamas) Clackamas | High Hazard | 33 ft | 1989 | Earth | Oregon |
| Buck Carroll | High Hazard | 30 ft | 1912 | Gravity | Virginia |
| Buck Ash Basin #1 Dam Rowan | High Hazard | — | 1982 | Earth | North Carolina |
| Buck Ash Basin Divider Dam Rowan | High Hazard | — | 1977 | Earth | North Carolina |
| Buck Basin #1 To Basin #2 Dam Rowan | High Hazard | — | 1982 | Earth | North Carolina |
| Buck Basin #2 To Basin #3 Dam Rowan | High Hazard | — | 1979 | Earth | North Carolina |
| Buck Creek FRS No 4 Lincoln | High Hazard | 44 ft | 1970 | Earth | Kentucky |
| Buck-Doe Run Watershed Structure #27a Lewis | High Hazard | 27 ft | 1975 | Earth | Missouri |
| Buckeye #1 Montrose | High Hazard | 38 ft | 1910 | Earth | Colorado |
| Buckeye Creek Dam Perry | High Hazard | 300 ft | — | Earth | Kentucky |
| Buckeye Creek Lower Effluent Storage Pond Dam Douglas | High Hazard | 27 ft | — | Earth | Nevada |
| Buckeye Creek Middle Effluent Storage Pond Dam Douglas | High Hazard | 27 ft | — | Earth | Nevada |
| Buckeye Creek Upper Effluent Storage Pond Dam Douglas | High Hazard | 27 ft | — | Earth | Nevada |
| Buckeye FRS #1 Maricopa | High Hazard | 26 ft | 1974 | Earth | Arizona |
| Buckeye FRS #2 Maricopa | High Hazard | 16 ft | 1975 | Earth | Arizona |
| Buckeye FRS #3 Maricopa | High Hazard | 21 ft | 1975 | Earth | Arizona |
| Buckeye Lake Dam Licking | High Hazard | 15 ft | 1832 | Other | Ohio |
| Buckeye Water District Reservoir Columbiana | High Hazard | 56 ft | 2008 | Earth | Ohio |
| Buckeye Water District Reservoir Ii Columbiana | High Hazard | 38 ft | 2020 | Earth | Ohio |
| Buckhorn Trinity | High Hazard | 84 ft | 1991 | Earth | California |
| Buckhorn Dam Perry | High Hazard | — | 1960 | Rockfill | Kentucky |
| Buckhorn Lake Dam Guilford | High Hazard | — | 1960 | Earth | North Carolina |
| Buckhorn Lake Dam Wilson | High Hazard | — | — | Earth | North Carolina |
| Buckingham County Dam #2 Buckingham | High Hazard | 19 ft | — | Earth | Virginia |
| Buckley-Dunton Lake Dam Berkshire | High Hazard | 22 ft | 1965 | Earth | Massachusetts |
| Bucklin City Lake Dam Linn | High Hazard | 30 ft | 1937 | Earth | Missouri |
| Bucklin Point Providence | High Hazard | 19 ft | 1950 | — | Rhode Island |
| Buck Main Ash Basin Dam Rowan | High Hazard | — | 1957 | Earth | North Carolina |
| Buckman Dam Shelby | High Hazard | 25 ft | 1954 | Earth | Missouri |
| Buck Mountain Reservoir Dam No 1 San Juan | High Hazard | — | 1985 | Earth | Washington |
| Buck Mountain Reservoir Dam No 2 San Juan | High Hazard | — | 1985 | Earth | Washington |