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 |
|---|---|---|---|---|---|
| Camp Ta-Ri-Go Dam Delaware | Significant Hazard | 19 ft | 1938 | Concrete | New York |
| Camp Tekoa Dam Henderson | Significant Hazard | — | — | Earth | North Carolina |
| Camp Trees Butler | Significant Hazard | 17 ft | — | Earth | Pennsylvania |
| Campus Drive Dam Merrimack | Significant Hazard | 26 ft | 2006 | Earth | New Hampshire |
| Campus Lake Dam Jackson | Significant Hazard | 20 ft | 1869 | Earth | Illinois |
| Camp Victor Dam Morgan | Significant Hazard | 27 ft | 1953 | Earth | Indiana |
| Canaan Sewage Lagoon Dam Grafton | Significant Hazard | 13 ft | 1991 | Earth | New Hampshire |
| Canada Upper Pond Providence | Significant Hazard | 20 ft | 1915 | Earth | Rhode Island |
| Canajoharie Reservoir Dam Fulton | Significant Hazard | 40 ft | 1948 | Earth | New York |
| Candee Reservoir Dam New Haven | Significant Hazard | 24 ft | — | Concrete | Connecticut |
| Candlewood Lake Dam Wood | Significant Hazard | 23 ft | 1962 | Earth | Ohio |
| Cane Creek Lincoln | Significant Hazard | 27 ft | 1989 | Earth | Arkansas |
| Cane Creek #3 Lauderdale | Significant Hazard | — | 1965 | Earth | Tennessee |
| Cane Creek #5 Lauderdale | Significant Hazard | — | 1971 | Earth | Tennessee |
| Cane Creek #9 Lauderdale | Significant Hazard | — | 1968 | Earth | Tennessee |
| Cane Creek Lake Dam Union | Significant Hazard | — | 1974 | Earth | North Carolina |
| Cane River Dam Natchitoches | Significant Hazard | 32 ft | 1949 | Earth | Louisiana |
| Caney Creek FRS 12 Grayson | Significant Hazard | 27 ft | 1971 | Earth | Kentucky |
| Caney Creek FRS 13 Grayson | Significant Hazard | 37 ft | 1964 | Earth | Kentucky |
| Caney Creek FRS 7 Grayson | Significant Hazard | 38 ft | 1978 | Earth | Kentucky |
| Caney Creek FRS 9 Grayson | Significant Hazard | 42 ft | 1964 | Earth | Kentucky |
| Caney Creek FRS No 1 Grayson | Significant Hazard | 40 ft | 1965 | Earth | Kentucky |
| Caney Creek FRS No 5 Grayson | Significant Hazard | 39 ft | 1972 | Earth | Kentucky |
| Caney Creek Mps 2 Grayson | Significant Hazard | 34 ft | 1965 | Earth | Kentucky |
| Caney Creek Wid Site 2 Cross | Significant Hazard | — | 1960 | Earth | Arkansas |
| Caney Creek Wid Site 3a Cross | Significant Hazard | 34 ft | 1960 | Earth | Arkansas |
| Caney Creek WS SCS Site 12 Dam Fannin | Significant Hazard | 24 ft | 1967 | Earth | Texas |
| Cannelton Locks and Dam Hancock | Significant Hazard | — | 1974 | Concrete | Kentucky |
| Cannery Creek Dam Chugach Census Area | Significant Hazard | 17 ft | 1979 | Concrete | Alaska |
| Cannon Ranch Butte | Significant Hazard | 17 ft | 1870 | Earth | California |
| Cannon River (Woolen Mills) Rice | Significant Hazard | 6 ft | 1865 | Gravity | Minnesota |
| Canoe Brook Dam Essex | Significant Hazard | 9 ft | 1880 | Earth | New Jersey |
| Canoe River Campground Dam Bristol | Significant Hazard | 10 ft | 2010 | Earth | Massachusetts |
| Canonsburg No 1 Washington | Significant Hazard | 36 ft | 1911 | Earth | Pennsylvania |
| Canterbury Dam Wake | Significant Hazard | — | — | Earth | North Carolina |
| Canton Dam No.1 Lincoln | Significant Hazard | 27 ft | 1977 | Earth | South Dakota |
| Cantrell Lake Dam Van Zandt | Significant Hazard | 20 ft | 1972 | Earth | Texas |
| Cantrell Lake Dam White | Significant Hazard | 27 ft | 1990 | Earth | Illinois |
| Cantys Lake Dam Morris | Significant Hazard | 20 ft | 1928 | Earth | New Jersey |
| Canyon Lakes Project Dam No 2 Lubbock | Significant Hazard | 12 ft | 1975 | Other | Texas |
| Canyon Lakes Project Dam No 3 Lubbock | Significant Hazard | 9 ft | 1976 | Other | Texas |
| Canyonville Reservoir Douglas | Significant Hazard | 58 ft | 1983 | Concrete | Oregon |
| Cape Pond Dam Ulster | Significant Hazard | 20 ft | 1914 | Earth | New York |
| Capps Lake Dam Lincoln | Significant Hazard | — | 1962 | Earth | Arkansas |
| Caprons Pond Dam, Canal and Gates Worcester | Significant Hazard | 17 ft | — | Earth | Massachusetts |
| Captain Anthony Meldahl Locks and Dam Bracken | Significant Hazard | — | 1965 | Concrete | Kentucky |
| Caputo Pike | Significant Hazard | 20 ft | — | Earth | Pennsylvania |
| Caraness Lake Dam Hardin | Significant Hazard | 37 ft | 1959 | Earth | Illinois |
| Carbon Lake Dam Jackson | Significant Hazard | 14 ft | — | Rockfill | Illinois |
| Cardinal Lake Dam Transylvania | Significant Hazard | — | 1979 | Earth | North Carolina |