Navratil Wpa is an earth dam located in Roberts County, South Dakota, built in 1990. It carries a Low hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 374 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 Navratil Wpa
The primary purpose of Navratil Wpa 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 Usf&ws (federal). It impounds the Trib. Big Slough Creek.
The dam stands 9 feet tall and stretches 374 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 122 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1990, the structure is 36 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.
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Location
| State | South Dakota |
| County | Roberts |
| Nearest City | None |
| River/Stream | Trib. Big Slough Creek |
| Coordinates | 45.92569, -96.92614 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 374 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 122 acre-ft |
| Max Storage | 122 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 740 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Usf&ws |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02351 |
| Federal ID | SD02351 |
| More Info | State Dam Safety Program |