67Total Dams
1High Hazard
5Significant
Dam Safety in Lyman County, South Dakota
Lyman County has 67 dams tracked in the National Inventory of Dams. Of these, 1 are classified as high hazard — meaning failure would probably cause loss of human life. Another 5 carry a significant hazard classification.
The average dam in Lyman County is 61 years old. The most common purpose is fire protection, stock, or small fish pond. The tallest dam is Big Bend Dam at 205 ft.
Explore more: Oldest dams in South Dakota · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Big Bend Dam | High | Not assessed | 205 | Flood Risk Reduction | 1963 |
| Orl Walcott #1 | Significant | Not assessed | 53 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Brakke Dam | Significant | Not assessed | 29 | Recreation | 1937 |
| Byre Dam | Significant | Not assessed | 27 | Recreation | 1940 |
| Vivian Dam | Significant | Not assessed | 21 | Fire Protection, Stock, Or Small Fish Pond | 1938 |
| Reliance Dam | Significant | Not assessed | 16 | Recreation | 1935 |
| Smith Dam | Low | Not assessed | 43 | Fish and Wildlife Pond | 2006 |
| Bruce Herman | Low | Not assessed | 38 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| Hutchinson Dam | Low | Not assessed | 38 | Fire Protection, Stock, Or Small Fish Pond | 1968 |
| Christensen Dam | Low | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 1968 |
| Dejong Bros. 7 | Low | Not assessed | 33 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Dejong Bros 1 | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Floyd Sletto | Low | Not assessed | 31 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Hutchinson Irr. Dam | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Dejongs Bros. 8 | Low | Not assessed | 29 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Straka Bros. | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Dale Ellis | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Merrill Karlen #1 | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1954 |
| Dejong Bros. 12 | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Gus Allen 2 | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Gus Allen 1 | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1955 |
| Lee Anderson | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| Archie Millard #1 | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| Larsen Dam | Low | Not assessed | 26 | Recreation | 1937 |
| John Bunker | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Wendell Gilman | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Steve Perry Dam | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1997 |
| Alfred Hutchinson | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Archie Millard #2 | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1968 |
| Dejong Bros 10 | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Dejong Bros 9 | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Merrill Karlen #2 | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1958 |
| Lookout | Low | Not assessed | 25 | Water Supply | 1938 |
| Fate Dam | Low | Not assessed | 25 | Recreation | 1938 |
| Joe Svoboda #2 | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1952 |
| Joe Svoboda | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Emil Schulz | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Alfred Urban | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Dejong Bros 11 | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Larsen Irrigation Dam | Low | Not assessed | 25 | Irrigation | 1978 |
| William Smith | Low | Not assessed | 24 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Booth | Low | Not assessed | 23 | Fire Protection, Stock, Or Small Fish Pond | 1938 |
| Thompson Dam | Low | Not assessed | 23 | Fish and Wildlife Pond | 2010 |
| Oscar Diess | Low | Not assessed | 22 | Fire Protection, Stock, Or Small Fish Pond | 1953 |
| Anderson Dam | Low | Not assessed | 21 | Fish and Wildlife Pond | |
| Velda Ramser Dam | Low | Not assessed | 21 | Fish and Wildlife Pond | 1994 |
| Kennebec Grazing Assoc. Dam | Low | Not assessed | 21 | Fish and Wildlife Pond | |
| Mallard Dam | Low | Not assessed | 20 | Fish and Wildlife Pond | 1942 |
| Smith Dam | Low | Not assessed | 20 | Fish and Wildlife Pond | 1960 |
| Havemeier | Low | Not assessed | 19 | Fish and Wildlife Pond | 2014 |
| Summit | Low | Not assessed | 18 | Fish and Wildlife Pond | 1938 |
| Dorman Dam | Low | Not assessed | 18 | Irrigation | 1939 |
| Comp Dam | Low | Not assessed | 18 | Fish and Wildlife Pond | 1994 |
| Nels (nid) | Low | Not assessed | 18 | Fire Protection, Stock, Or Small Fish Pond | 1938 |
| 83 No 2 (nid) | Low | Not assessed | 18 | Fire Protection, Stock, Or Small Fish Pond | 1938 |
| County Line Impoundment | Low | Not assessed | 17 | Fish and Wildlife Pond | 1992 |
| Bower (nid) | Low | Not assessed | 17 | Fire Protection, Stock, Or Small Fish Pond | 1938 |
| Halverson Dam | Low | Not assessed | 17 | Fish and Wildlife Pond | 2004 |
| Ehlers Dam | Low | Not assessed | 16 | Fish and Wildlife Pond | 1992 |
| Alkali (nid) | Low | Not assessed | 16 | Fire Protection, Stock, Or Small Fish Pond | 1938 |
| Leichtnam Dam | Low | Not assessed | 16 | Fish and Wildlife Pond | 2003 |
| Schindler Dam | Low | Not assessed | 16 | Fish and Wildlife Pond | 2010 |
| Christensen Dam | Low | Not assessed | 15 | Irrigation | |
| Cone Dam | Low | Not assessed | 14 | Fish and Wildlife Pond | 2013 |
| Cannon Dam | Low | Not assessed | 13 | Fish and Wildlife Pond | 2009 |
| Hafner Dam | Low | Not assessed | 12 | Fire Protection, Stock, Or Small Fish Pond | 1937 |
| Petersen Dam | Low | Not assessed | 11 | Fire Protection, Stock, Or Small Fish Pond | 1955 |