J. Willey is an earth dam located in Potter County, South Dakota, built in 1948. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 490 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 J. Willey
The primary purpose of J. Willey 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 Patricia Willey Revocable Living Trust (private). It impounds the Tr-cheyenne Creek.
The dam stands 16 feet tall and stretches 490 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 116 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1948, 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. The most recent inspection on record was 11/05/2009. That was over 16 years ago.
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Location
| State | South Dakota |
| County | Potter |
| Nearest City | None |
| River/Stream | Tr-cheyenne Creek |
| Coordinates | 45.19066, -100.10747 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 490 ft |
| Year Completed | 1948 (78 years old) |
Storage & Hydraulics
| NID Storage | 116 acre-ft |
| Max Storage | 116 acre-ft |
| Normal Storage | 88 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Patricia Willey Revocable Living Trust |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/05/2009 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00930 |
| Federal ID | SD00930 |
| More Info | State Dam Safety Program |