Hett No.2 is an earth dam located in Harding County, South Dakota, built in 1949. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 395 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 Hett No.2
The primary purpose of Hett No.2 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 Don Hett (private). It impounds the Tr-south Fork Grand River.
The dam stands 19 feet tall and stretches 395 feet across, and has a maximum storage capacity of 142 acre-feet. Completed in 1949, 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 | Harding |
| Nearest City | None |
| River/Stream | Tr-south Fork Grand River |
| Coordinates | 45.46999, -103.64999 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 395 ft |
| Year Completed | 1949 (77 years old) |
Storage & Hydraulics
| NID Storage | 142 acre-ft |
| Max Storage | 142 acre-ft |
| Normal Storage | 75 acre-ft |
| Max Discharge | 420 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Don Hett |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01869 |
| Federal ID | SD01869 |
| More Info | State Dam Safety Program |