Coal Springs Dam is an earth dam located in Perkins County, South Dakota, built in 1934. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 1,100 ft long, taller than 72% of U.S. dams with a recorded height. 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 Coal Springs Dam
The primary purpose of Coal Springs Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by S&pl (state). It impounds the Tr-moreau.
The dam stands 31 feet tall and stretches 1,100 feet across, and has a maximum storage capacity of 1,600 acre-feet. Completed in 1934, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 11/11/2018.
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Location
| State | South Dakota |
| County | Perkins |
| Nearest City | None |
| River/Stream | Tr-moreau |
| Coordinates | 45.41657, -102.09139 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 1,100 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 1,218 acre-ft |
| Max Discharge | 400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&pl |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/11/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00926 |
| Federal ID | SD00926 |
| More Info | State Dam Safety Program |