Beaver is an earth dam located in Yankton County, South Dakota, built in 1941. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 650 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 Beaver
The primary purpose of Beaver is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Gf&p (state). It impounds the Tr-james.
The dam stands 15 feet tall and stretches 650 feet across, and has a maximum storage capacity of 450 acre-feet. Completed in 1941, 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. The most recent inspection on record was 10/05/2022.
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Location
| State | South Dakota |
| County | Yankton |
| Nearest City | None |
| River/Stream | Tr-james |
| Coordinates | 43.00930, -97.44364 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 650 ft |
| Year Completed | 1941 (85 years old) |
Storage & Hydraulics
| NID Storage | 450 acre-ft |
| Max Storage | 450 acre-ft |
| Normal Storage | 400 acre-ft |
| Max Discharge | 2,050 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Gf&p |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/05/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00690 |
| Federal ID | SD00690 |
| More Info | State Dam Safety Program |