Chapman Dam is an earth dam located in Perkins County, South Dakota, built in 1965. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 400 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 Chapman Dam
The primary purpose of Chapman 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 Defanball Creek.
The dam stands 20 feet tall and stretches 400 feet across, and has a maximum storage capacity of 72 acre-feet. Completed in 1965, the structure is well into its service life at over 50 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.
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Location
| State | South Dakota |
| County | Perkins |
| Nearest City | None |
| River/Stream | Defanball Creek |
| Coordinates | 45.61166, -102.56666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 400 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 72 acre-ft |
| Max Storage | 72 acre-ft |
| Normal Storage | 50 acre-ft |
| Max Discharge | 150 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Usda Fs |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01829 |
| Federal ID | SD01829 |
| More Info | State Dam Safety Program |