Merkwan Dam
Merkwan Dam is an earth dam located in Charles Mix County, South Dakota, built in 1981. It carries a Low hazard potential classification.
About Merkwan Dam
The primary purpose of Merkwan Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Dan Merkwan (private). It impounds the Pease Creek-tr.
The dam stands 35 feet tall and stretches 250 feet across, and has a maximum storage capacity of 120 acre-feet. Completed in 1981, the structure is 45 years old.
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.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | South Dakota |
| County | Charles Mix |
| Nearest City | None |
| River/Stream | Pease Creek-tr |
| Coordinates | 43.20593, -98.71705 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 250 ft |
| Year Completed | 1981 (45 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 100 acre-ft |
| Max Discharge | 4,400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | DAN MERKWAN |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02423 |
| Federal ID | SD02423 |
| More Info | State Dam Safety Program |