Long Hollow Dam is an earth dam located in Fall River County, South Dakota, built in 1947. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 2,000 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 Long Hollow Dam
The primary purpose of Long Hollow 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 Weinreis Brothers Land LLP (private). It impounds the Long Hollow Creek.
The dam stands 24 feet tall and stretches 2,000 feet across, and has a maximum storage capacity of 576 acre-feet. Completed in 1947, 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 | Fall River |
| Nearest City | None |
| River/Stream | Long Hollow Creek |
| Coordinates | 43.14233, -103.59980 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 2,000 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 576 acre-ft |
| Max Storage | 576 acre-ft |
| Normal Storage | 480 acre-ft |
| Max Discharge | 33,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Weinreis Brothers Land LLP |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01033 |
| Federal ID | SD01033 |
| More Info | State Dam Safety Program |