Wolff Lake
Wolff Lake is an earth dam located in McPherson County, South Dakota, built in 1938. It carries a Low hazard potential classification.
About Wolff Lake
The primary purpose of Wolff Lake is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by S&pl (state). It impounds the Tr-spring Creek.
The dam stands 20 feet tall and stretches 1,200 feet across, creates a reservoir covering 24 acres, has a maximum storage capacity of 285 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1938, 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 05/31/2017.
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Location
| State | South Dakota |
| County | McPherson |
| Nearest City | None |
| River/Stream | Tr-spring Creek |
| Coordinates | 45.89368, -99.41528 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 285 acre-ft |
| Max Storage | 285 acre-ft |
| Normal Storage | 116 acre-ft |
| Surface Area | 24 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 2,628 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | S&PL |
| Owner Type | State |
| Hazard Classification | Low |
| Last Inspection | 05/31/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00667 |
| Federal ID | SD00667 |
| More Info | State Dam Safety Program |