Dams in St. Louis County, Missouri
48Total Dams
39High Hazard
3Significant
Dam Safety in St. Louis County, Missouri
St. Louis County has 48 dams tracked in the National Inventory of Dams. Of these, 39 are classified as high hazard — meaning failure would probably cause loss of human life. Another 3 carry a significant hazard classification. Currently, 1 dams have a condition assessment of poor or unsatisfactory.
The average dam in St. Louis County is 56 years old. The most common purpose is recreation. The tallest dam is Lake Trails Dam at 78 ft.
Explore more: Oldest dams in Missouri · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Dierberg Lake Dam | High | Satisfactory | 68 | Recreation | 1982 |
| Cherry Hill Dam | High | Satisfactory | 68 | Recreation | 1988 |
| Fienup Lake Dam | High | Satisfactory | 62 | Recreation | 1970 |
| Friendship Village Of West County Dam | High | Satisfactory | 61 | 1975 | |
| Joe Machs Lake Dam | High | Satisfactory | 56 | 1996 | |
| Chesterfield Village #3 Dam | High | Satisfactory | 52 | ||
| City Place Dam | High | Satisfactory | 51 | Recreation | 1988 |
| Tapawingo Lake Dam | High | Unsatisfactory | 49 | Recreation | |
| Chesterfield Village #2 Dam | High | Satisfactory | 44 | ||
| Lake Post Commons Dam | High | Satisfactory | 44 | Flood Risk Reduction | 1976 |
| Lasiandra Lake Dam | High | Satisfactory | 42 | Recreation | 1994 |
| Woods Mill Cove Dam | High | Satisfactory | 42 | Other | 1988 |
| Wildhorse Creek Parkway Dam | High | Satisfactory | 41 | Flood Risk Reduction | 1989 |
| Fountain Lake Dam | High | Satisfactory | 36 | ||
| City Of Fenton Dam #1 | High | Not Rated | 35 | ||
| Village Of Green Trails Dam | High | Not Rated | 35 | 2005 | |
| Milner Lake Dam | High | Not Rated | 34 | ||
| Wildhorse Creek Parkway Dam #2 | High | Not Rated | 34 | Recreation | |
| Strumfels Lake Dam | High | Not Rated | 34 | Recreation | 1959 |
| Westgate Lake Dam | High | Not Rated | 33 | Recreation | 1972 |
| Holt's Lake Dam | High | Not Rated | 33 | Recreation | 1973 |
| General American Life Insurance Lk Dm | High | Not Rated | 33 | Flood Risk Reduction | 1976 |
| Hunter Dam | High | Not Rated | 32 | Recreation | 1957 |
| Goessling Dam | High | Not Rated | 32 | Recreation | 1961 |
| Guilford Lake Dam | High | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Lake Chesterfield Dam | High | Not Rated | 30 | Recreation | |
| Raewood Lake Dam | High | Not Rated | 30 | Flood Risk Reduction | 1960 |
| Pheasant Run Lake Dam | High | Not Rated | 30 | Recreation | 1972 |
| Stacy Park Resevoir Dam | High | Not Rated | 30 | Water Supply | 1928 |
| Arrowhead Estates-upper-dam(shallow) | High | Not Rated | 30 | Recreation | 1955 |
| Arrowhead Estates-lower-dam(shallow) | High | Not Rated | 30 | Recreation | 1955 |
| Kehrs Mill Trails Upper Lake Dam | High | Not Rated | 30 | Recreation | 1976 |
| Klein's Lake Dam | High | Not Rated | 25 | Recreation | 1959 |
| Claymont Woods Lake Dam | High | Not Rated | 25 | Recreation | 1970 |
| Kehr's Mill Trail Lower Lake Dam | High | Not Rated | 25 | Recreation | 1976 |
| Mertz Lake Dam | High | Not Rated | 24 | Recreation | 1954 |
| Lake Sherwood | High | Not Rated | 21 | Recreation | 1894 |
| Lake Lasalle Dam | High | Not Rated | 20 | Flood Risk Reduction | 1955 |
| Bee Tree Lake Dam | High | Not Rated | 18 | Recreation | 1972 |
| Lake Trails Dam | Significant | Satisfactory | 78 | Recreation | 1975 |
| Wildhorse Creek Forest Dam | Significant | Satisfactory | 60 | Flood Risk Reduction | 1989 |
| Paradise Valley Dam | Significant | Not Rated | 32 | Recreation | |
| Lone Elk Lower Dam | Low | Satisfactory | 45 | Recreation | 1966 |
| Kehr's Mill Trail East Lake Dam | Low | Not Rated | 34 | Recreation | 1977 |
| Lone Elk-upper Dam | Low | Not Rated | 30 | Recreation | |
| Top Notch Lake Dam | Low | Not Rated | 30 | Recreation | 1971 |
| Wakefield Farm Lake Dam | Low | Not Rated | 30 | Recreation | 1959 |
| City Of Fenton Dam #2 | Low | Not Rated | 25 |