Nygaard Trout Dam is an earth dam located in Harding County, South Dakota, built in 1956. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 320 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 Nygaard Trout Dam
The primary purpose of Nygaard Trout Dam 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 Leonard Nygaard (private). It impounds the Trib S Fork Grand River.
The dam stands 21 feet tall and stretches 320 feet across, and has a maximum storage capacity of 67 acre-feet. Completed in 1956, 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 | Trib S Fork Grand River |
| Coordinates | 45.86999, -103.27332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 320 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 67 acre-ft |
| Max Storage | 67 acre-ft |
| Normal Storage | 54 acre-ft |
| Max Discharge | 525 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Leonard Nygaard |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00606 |
| Federal ID | SD00606 |
| More Info | State Dam Safety Program |