Mallard Dam
Mallard Dam is an earth dam located in Lyman County, South Dakota, built in 1942. It carries a Low hazard potential classification.
About Mallard Dam
The primary purpose of Mallard Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Usda Fs (federal). It impounds the Cedar Creek.
The dam stands 20 feet tall and stretches 400 feet across, and has a maximum storage capacity of 166 acre-feet. Completed in 1942, 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.
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Location
| State | South Dakota |
| County | Lyman |
| Nearest City | None |
| River/Stream | Cedar Creek |
| Coordinates | 44.14707, -100.18661 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 400 ft |
| Year Completed | 1942 (84 years old) |
Storage & Hydraulics
| NID Storage | 166 acre-ft |
| Max Storage | 166 acre-ft |
| Normal Storage | 88 acre-ft |
| Max Discharge | 2,080 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USDA FS |
| Owner Type | Federal |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02331 |
| Federal ID | SD02331 |
| More Info | State Dam Safety Program |