Hafner Duck Lake is an earth dam located in Harding County, South Dakota, built in 1957. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 700 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 Hafner Duck Lake
The primary purpose of Hafner Duck Lake is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Lester Hafner (private). It impounds the Coal Bank Creek.
The dam stands 19 feet tall and stretches 700 feet across, and has a maximum storage capacity of 148 acre-feet. Completed in 1957, 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 | Harding |
| Nearest City | None |
| River/Stream | Coal Bank Creek |
| Coordinates | 45.83785, -103.26034 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 700 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 148 acre-ft |
| Max Storage | 148 acre-ft |
| Normal Storage | 117 acre-ft |
| Max Discharge | 1,050 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Lester Hafner |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00608 |
| Federal ID | SD00608 |
| More Info | State Dam Safety Program |