Lower James Rc&d Ca-171-ya is an earth dam located in Yankton County, South Dakota, built in 1980. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 555 ft long, taller than 72% 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 Lower James Rc&d Ca-171-ya
The primary purpose of Lower James Rc&d Ca-171-ya is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by Yankton Co. Consv. Dist. (local government). It impounds the Clay Creek-tr near Vermillion.
The dam stands 31 feet tall and stretches 555 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 104 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1980, the structure is 46 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 | Yankton |
| Nearest City | Vermillion |
| River/Stream | Clay Creek-tr |
| Coordinates | 43.07675, -97.25924 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 555 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 104 acre-ft |
| Max Storage | 104 acre-ft |
| Normal Storage | 31 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 51 cfs |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Yankton Co. Consv. Dist. |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02289 |
| Federal ID | SD02289 |
| More Info | State Dam Safety Program |