Significant Hazard Dams
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
| Dam Name | Hazard | Height | Built | Type | State |
|---|---|---|---|---|---|
| W J Sorrell Montgomery | Significant Hazard | — | 1949 | Earth | Alabama |
| W L Clyburn Dam Lee | Significant Hazard | 10 ft | 1930 | — | South Carolina |
| Wohali Dam - Wohali Partners LLC Summit | Significant Hazard | — | — | Earth | Utah |
| Wohelo Lake Franklin | Significant Hazard | 28 ft | 1953 | Earth | Pennsylvania |
| Wohler Routt | Significant Hazard | 28 ft | 1901 | Earth | Colorado |
| Wolcott Reservoir Conveyor Dam Hartford | Significant Hazard | 21 ft | — | — | Connecticut |
| Wolery Waters Hill | Significant Hazard | 15 ft | 1945 | Earth | Montana |
| Wolf Coulee Dam Teton | Significant Hazard | 38 ft | 2004 | Earth | Montana |
| Wolf Creek Oglala Lakota | Significant Hazard | — | 1965 | Earth | South Dakota |
| Wolf Creek Irrigation Co. 99-35-72md Weber | Significant Hazard | — | — | Rockfill | Utah |
| Wolf Creek Irrigation Company Weber | Significant Hazard | — | — | Earth | Utah |
| Wolf Creek Water Conservancy District Weber | Significant Hazard | — | — | Earth | Utah |
| Wolf Hollow Williamson | Significant Hazard | — | 1983 | Earth | Tennessee |
| Wolverine Lake Dam Oakland | Significant Hazard | 15 ft | 1925 | Earth | Michigan |
| Womack Sumner | Significant Hazard | — | 1947 | Earth | Tennessee |
| Womack Lake Dam Pike | Significant Hazard | 22 ft | 1965 | Earth | Arkansas |
| Womack Lake Dam Perry | Significant Hazard | — | 1960 | Earth | Arkansas |
| Wong Lake Dam Guernsey | Significant Hazard | 28 ft | — | Earth | Ohio |
| Wononpakook Lake Dam Litchfield | Significant Hazard | 10 ft | 1920 | Earth | Connecticut |
| Wood Bradford | Significant Hazard | 10 ft | — | Earth | Pennsylvania |
| Woodard-Smith Dam Wake | Significant Hazard | — | — | Earth | North Carolina |
| Woodbine Springs Hoa Dam #1 Santa Rosa | Significant Hazard | 25 ft | 1963 | Earth | Florida |
| Woodbridge Golf Course Dam Cleveland | Significant Hazard | — | — | Earth | North Carolina |
| Woodbury County Roadgrade Dam 36-86-42 Woodbury | Significant Hazard | 42 ft | 1990 | Earth | Iowa |
| Woodbury Creek Dam Gloucester | Significant Hazard | 6 ft | 1961 | Earth | New Jersey |
| Woodbury Estate Pond Dam Hillsborough | Significant Hazard | 16 ft | 1935 | Earth | New Hampshire |
| Woodbury Hudson Rd Washington | Significant Hazard | 16 ft | 2004 | Concrete | Minnesota |
| Woodbury Upper Washington | Significant Hazard | 15 ft | 1949 | Gravity | Vermont |
| Wood Creek Pond Dam Litchfield | Significant Hazard | 22 ft | 1900 | Earth | Connecticut |
| Wood Duck Pond Dam Gloucester | Significant Hazard | 13 ft | — | Earth | Virginia |
| Wooded Lake Dam Cumberland | Significant Hazard | — | — | Earth | North Carolina |
| Woodhaven Lake Jefferson | Significant Hazard | — | 1973 | Earth | Alabama |
| Woodhill Lake Dam Dallas | Significant Hazard | 32 ft | 1988 | Earth | Iowa |
| Woodlake Shelby | Significant Hazard | — | 1950 | Earth | Tennessee |
| Wood Lake Dam Bartholomew | Significant Hazard | 15 ft | 1976 | Earth | Indiana |
| Woodland Altars Lake Dam Adams | Significant Hazard | 24 ft | 1964 | Earth | Ohio |
| Woodland Hills Debris Basin Utah | Significant Hazard | — | — | Earth | Utah |
| Woodland Hills Lake Dickson | Significant Hazard | — | 1999 | Earth | Tennessee |
| Woodland Lake Dam Columbiana | Significant Hazard | 19 ft | 1948 | Earth | Ohio |
| Woodland Lake Dam Polk | Significant Hazard | 43 ft | 1971 | Earth | Iowa |
| Woodland Lake Dam Macoupin | Significant Hazard | 27 ft | — | Earth | Illinois |
| Woodland Lake Dam Saratoga | Significant Hazard | 17 ft | 1957 | Earth | New York |
| Woodland Lake Leisure Resort Dam Highland | Significant Hazard | 26 ft | 1971 | Earth | Ohio |
| Woodlands Dam Litchfield | Significant Hazard | 9 ft | — | Concrete | Connecticut |
| Woodlands Lake Dam Westchester | Significant Hazard | 20 ft | 1840 | Masonry | New York |
| Woodlands Parkway Dam Polk | Significant Hazard | 28 ft | 1964 | Earth | Iowa |
| Wood (Lower) Dam Henderson | Significant Hazard | — | 1965 | Earth | North Carolina |
| Woodmark Community Pond Howard | Significant Hazard | 12 ft | 1968 | Masonry | Maryland |
| Woodmere No 2 Shelby | Significant Hazard | — | 1967 | Gravity | Alabama |
| Woodmoor Dam #1 Stark | Significant Hazard | 17 ft | 1978 | Earth | Ohio |