Crompton is an earth dam located in McPherson County, South Dakota, built in 1935. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 300 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 Crompton
The primary purpose of Crompton 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 Trib. Spring Creek.
The dam stands 20 feet tall and stretches 300 feet across, creates a reservoir covering 55 acres, has a maximum storage capacity of 1,225 acre-feet, and collects water from a drainage area of 44 square miles. Completed in 1935, 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 10/20/2022.
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Location
| State | South Dakota |
| County | McPherson |
| Nearest City | None |
| River/Stream | Trib. Spring Creek |
| Coordinates | 45.61433, -98.85328 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 300 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 1,225 acre-ft |
| Max Storage | 1,225 acre-ft |
| Normal Storage | 275 acre-ft |
| Surface Area | 55 acres |
| Drainage Area | 44 sq mi |
| Max Discharge | 6,448 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&pl |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/20/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02203 |
| Federal ID | SD02203 |
| More Info | State Dam Safety Program |