Harr Dam is an earth dam located in Minnehaha County, South Dakota, built in 1977. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 275 ft long, taller than 62% of U.S. dams with a recorded height. 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 Harr Dam
The primary purpose of Harr Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Robert Hille (private). It impounds the Trib. Big Sioux River.
The dam stands 28 feet tall and stretches 275 feet across, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1977, the structure is 49 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. The most recent inspection on record was 09/25/1991. That was over 35 years ago.
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Location
| State | South Dakota |
| County | Minnehaha |
| Nearest City | None |
| River/Stream | Trib. Big Sioux River |
| Coordinates | 43.53209, -96.63917 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 275 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 27 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,150 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Robert Hille |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/25/1991 |
| Emergency Action Plan | No |
Identifiers
| NID ID | SD02233 |
| Federal ID | SD02233 |
| More Info | State Dam Safety Program |