Black Gap Pond is an earth dam located in Pennington County, South Dakota, built in 1938. It carries a Low hazard potential classification.
Dam profile
NID height · 14 ft14 ft tall and 335 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 Black Gap Pond
The primary purpose of Black Gap Pond 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 Ranch at Black Gap Homeowners' Association (private). It impounds the Tr-rapid Creek.
The dam stands 14 feet tall and stretches 335 feet across, and has a maximum storage capacity of 101 acre-feet. Completed in 1938, 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 | Pennington |
| Nearest City | None |
| River/Stream | Tr-rapid Creek |
| Coordinates | 43.97809, -103.16592 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 335 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 101 acre-ft |
| Max Storage | 101 acre-ft |
| Normal Storage | 56 acre-ft |
| Max Discharge | 420 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Ranch at Black Gap Homeowners' Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01067 |
| Federal ID | SD01067 |
| More Info | State Dam Safety Program |