Flat Creek 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 · 35 ft35 ft tall and 1,673 ft long, taller than 80% 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 Flat Creek Dam
The primary purpose of Flat Creek 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-grand.
The dam stands 35 feet tall and stretches 1,673 feet across, creates a reservoir covering 173 acres, has a maximum storage capacity of 4,640 acre-feet, and collects water from a drainage area of 21 square miles. 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 11/07/2018.
At 35 feet, this dam is taller than 80% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Perkins |
| Nearest City | None |
| River/Stream | Tr-grand |
| Coordinates | 45.77760, -102.16766 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 1,673 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 4,640 acre-ft |
| Max Storage | 4,640 acre-ft |
| Normal Storage | 2,300 acre-ft |
| Surface Area | 173 acres |
| Drainage Area | 21 sq mi |
| Max Discharge | 14,482 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&pl |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/07/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00922 |
| Federal ID | SD00922 |
| More Info | State Dam Safety Program |