Roubaix Lake is an earth dam located in Lawrence County, South Dakota, built in 1936. It carries a Significant hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 275 ft long, taller than 50% 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 Roubaix Lake
The primary purpose of Roubaix Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Usda Fs (federal). It impounds the Middle Boxelder Creek near Nemo.
The dam stands 25 feet tall and stretches 275 feet across, has a maximum storage capacity of 92 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1936, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 09/05/2019.
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Location
| State | South Dakota |
| County | Lawrence |
| Nearest City | Nemo |
| River/Stream | Middle Boxelder Creek |
| Coordinates | 44.19937, -103.65938 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 20 ft |
| Dam Length | 275 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 92 acre-ft |
| Max Storage | 92 acre-ft |
| Normal Storage | 46 acre-ft |
| Drainage Area | 8 sq mi |
| Max Discharge | 575 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Usda Fs |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 09/05/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01119 |
| Federal ID | SD01119 |
| More Info | State Dam Safety Program |