Koch Dam
Koch Dam is an earth dam located in Buffalo County, South Dakota, built in 1934. It carries a Low hazard potential classification.
About Koch Dam
The primary purpose of Koch 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 Crow Creek-tr.
The dam stands 24 feet tall and stretches 400 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 300 acre-feet, and collects water from a drainage area of 3 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 11/03/2020.
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Location
| State | South Dakota |
| County | Buffalo |
| Nearest City | None |
| River/Stream | Crow Creek-tr |
| Coordinates | 44.15754, -98.98802 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 400 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&PL |
| Owner Type | State |
| Hazard Classification | Low |
| Last Inspection | 11/03/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02427 |
| Federal ID | SD02427 |
| More Info | State Dam Safety Program |