Little Moreau #2 is an earth dam located in Dewey County, South Dakota, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 300 ft long, taller than 88% of U.S. dams with a recorded height. 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 Little Moreau #2
The primary purpose of Little Moreau #2 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 Gf&p (state). It impounds the Trib. Little Moreau River.
The dam stands 42 feet tall and stretches 300 feet across, creates a reservoir covering 6 acres, and has a maximum storage capacity of 168 acre-feet. Completed in 1960, 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. The most recent inspection on record was 10/04/2018.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | South Dakota |
| County | Dewey |
| Nearest City | None |
| River/Stream | Trib. Little Moreau River |
| Coordinates | 45.35431, -101.08495 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 300 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 168 acre-ft |
| Max Storage | 168 acre-ft |
| Normal Storage | 117 acre-ft |
| Surface Area | 6 acres |
| Max Discharge | 425 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Gf&p |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/04/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02398 |
| Federal ID | SD02398 |
| More Info | State Dam Safety Program |