High Hazard Dams
Loss of human life is likely if the dam fails.
| Dam Name | Hazard | Height | Built | Type | State |
|---|---|---|---|---|---|
| Vouga Saguache | High Hazard | 56 ft | 1978 | Earth | Colorado |
| Vw Martin Dam Atascosa | High Hazard | 13 ft | 1964 | Earth | Texas |
| Wachusett Reservoir Dam Worcester | High Hazard | 114 ft | 1906 | Masonry | Massachusetts |
| Wachusett Reservoir North Dike Worcester | High Hazard | 85 ft | 1904 | Earth | Massachusetts |
| Wachusett Reservoir South Dike Worcester | High Hazard | 45 ft | 1906 | Earth | Massachusetts |
| Waco Dam McLennan | High Hazard | 140 ft | 1965 | Earth | Texas |
| Wade Jackson | High Hazard | 82 ft | 1963 | Earth | Oregon |
| Wadesboro Lake Dam Anson | High Hazard | — | 1920 | Concrete | North Carolina |
| Wadham Creek Luzerne | High Hazard | 30 ft | 1959 | Earth | Pennsylvania |
| Wadsworth Lake Dam Gloucester | High Hazard | 20 ft | 1926 | Earth | New Jersey |
| Wagamons Pond Dam Sussex | High Hazard | 17 ft | 1815 | Gravity | Delaware |
| Wageman Douglas | High Hazard | 40 ft | 1971 | Earth | Oregon |
| Wagner Sheridan | High Hazard | 58 ft | 1973 | Earth | Wyoming |
| Wagner Dam Leavenworth | High Hazard | 31 ft | 1969 | Rockfill | Kansas |
| Wagner Lake Dam Jefferson | High Hazard | 30 ft | 1960 | Earth | Missouri |
| Wagner Youth Camp Lake Dam Grant | High Hazard | 25 ft | 1948 | Earth | Indiana |
| Wagon Tongue Park | High Hazard | 32 ft | 1960 | Earth | Colorado |
| Wagon Train Dam Lancaster | High Hazard | — | 1963 | Earth | Nebraska |
| Wagon Wheel Detention Pond Dam Montgomery | High Hazard | 8 ft | — | Earth | Texas |
| Wagush Levee Dam Burlington | High Hazard | 8 ft | — | Earth | New Jersey |
| Wahatoya Lake Huerfano | High Hazard | 24 ft | 1901 | Earth | Colorado |
| Wahiawa Dam Honolulu | High Hazard | 88 ft | 1906 | Earth | Hawaii |
| Waiakalua Reservoir Kauai | High Hazard | 26 ft | 1920 | Earth | Hawaii |
| Waikaia Reservoir Kauai | High Hazard | 26 ft | 1951 | Earth | Hawaii |
| Waikoloa Reservoir No. 1 Hawaii | High Hazard | 44 ft | 1970 | Earth | Hawaii |
| Waikoloa Reservoir No. 2 Hawaii | High Hazard | 31 ft | 1975 | Earth | Hawaii |
| Waikoloa Reservoir No. 3 Hawaii | High Hazard | 54 ft | 1985 | Earth | Hawaii |
| Waikoloi Reservoir Kauai | High Hazard | 64 ft | 1958 | Earth | Hawaii |
| Wailua Reservoir Kauai | High Hazard | 40 ft | 1920 | Earth | Hawaii |
| Wailuku Water Reservoir 10 Maui | High Hazard | 52 ft | — | Earth | Hawaii |
| Wailuku Water Reservoir 6 Maui | High Hazard | 33 ft | — | Earth | Hawaii |
| Waimanalo 60 Mg Reservoir Honolulu | High Hazard | 65 ft | 1993 | Earth | Hawaii |
| Waimea 60 Mg Reservoir Hawaii | High Hazard | 50 ft | 1957 | Earth | Hawaii |
| Waita Reservoir Kauai | High Hazard | 23 ft | 1906 | Earth | Hawaii |
| Waites Dam Jackson | High Hazard | 15 ft | 1965 | Rockfill | Alabama |
| Wakefield Pond Washington | High Hazard | 9 ft | — | Earth | Rhode Island |
| Wake Forest Water Supply Dam Wake | High Hazard | — | 1960 | Earth | North Carolina |
| Wake Lake Dam Chesterfield | High Hazard | 16 ft | — | Earth | Virginia |
| Walch Dam Jackson | High Hazard | 65 ft | 1954 | Earth | Oregon |
| Walcott Lake Greene | High Hazard | 27 ft | 1964 | Earth | Arkansas |
| Walden Place Pond Dam Richland | High Hazard | 23 ft | 1950 | — | South Carolina |
| Walden Pond Dam Johnson | High Hazard | 24 ft | 1937 | Earth | Kansas |
| Walden Pond Dam #3 Union | High Hazard | — | 1996 | Earth | North Carolina |
| Walden Pond East End Dam Essex | High Hazard | 8 ft | 1905 | Earth | Massachusetts |
| Walden Pond Outlet Dam Essex | High Hazard | 43 ft | 1890 | Earth | Massachusetts |
| Walden Ridge Bledsoe | High Hazard | — | 2011 | Earth | Tennessee |
| Walden Ten No. 1 Dam Stafford | High Hazard | 24 ft | — | Earth | Virginia |
| Walden Two Dam Mecklenburg | High Hazard | — | — | Earth | North Carolina |
| Walden Woods Allegheny | High Hazard | 17 ft | 2000 | Earth | Pennsylvania |
| Walden Woods Lake Dam Washington | High Hazard | 24 ft | 1965 | Earth | Georgia |