Comp Dam is an earth dam located in Lyman County, South Dakota, built in 1994. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 666 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 Comp Dam
The primary purpose of Comp 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 Perry Comp (private). It impounds the Trib. Medicine Creek.
The dam stands 18 feet tall and stretches 666 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 226 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1994, the structure is 32 years old.
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.
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Location
| State | South Dakota |
| County | Lyman |
| Nearest City | None |
| River/Stream | Trib. Medicine Creek |
| Coordinates | 43.88333, -100.06832 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 666 ft |
| Year Completed | 1994 (32 years old) |
Storage & Hydraulics
| NID Storage | 226 acre-ft |
| Max Storage | 226 acre-ft |
| Normal Storage | 38 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 2,255 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Perry Comp |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02381 |
| Federal ID | SD02381 |
| More Info | State Dam Safety Program |