Thompson Dam is an earth dam located in Lyman County, South Dakota, built in 2010. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 292 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Thompson Dam
The primary purpose of Thompson Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by W. Matt Thompson (private). It impounds the Tr Bad River.
The dam stands 23 feet tall and stretches 292 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 74 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2010, the structure is relatively new.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Lyman |
| River/Stream | Tr Bad River |
| Coordinates | 43.87724, -99.57009 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 292 ft |
| Year Completed | 2010 (16 years old) |
Storage & Hydraulics
| NID Storage | 74 acre-ft |
| Max Storage | 74 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,080 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | W. Matt Thompson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02580 |
| Federal ID | SD02580 |
| More Info | State Dam Safety Program |