Peno Lake is an earth dam located in Hyde County, South Dakota, built in 1935. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 995 ft long, taller than 59% 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 Peno Lake
The primary purpose of Peno Lake 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 Ronald Pekarek (private). It impounds the Tr-missouri.
The dam stands 27 feet tall and stretches 995 feet across, creates a reservoir covering 40 acres, has a maximum storage capacity of 1,062 acre-feet, and collects water from a drainage area of 18 square miles. Completed in 1935, 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 | Hyde |
| Nearest City | None |
| River/Stream | Tr-missouri |
| Coordinates | 44.33743, -99.37541 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 995 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 1,062 acre-ft |
| Max Storage | 1,062 acre-ft |
| Normal Storage | 480 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 18 sq mi |
| Max Discharge | 5,200 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Ronald Pekarek |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00270 |
| Federal ID | SD00270 |
| More Info | State Dam Safety Program |