Gregg Dam is an earth dam located in Todd County, South Dakota, built in 2009. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 500 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 Gregg Dam
The primary purpose of Gregg Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Jeffery Gregg (private). It impounds the Tr White Horse Creek.
The dam stands 12 feet tall and stretches 500 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 155 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 2009, the structure is relatively new.
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 | Todd |
| River/Stream | Tr White Horse Creek |
| Coordinates | 43.38879, -100.27279 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 500 ft |
| Year Completed | 2009 (17 years old) |
Storage & Hydraulics
| NID Storage | 155 acre-ft |
| Max Storage | 155 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,350 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Jeffery Gregg |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02570 |
| Federal ID | SD02570 |
| More Info | State Dam Safety Program |