Lake Herman Mip #1 is an earth dam located in Lake County, South Dakota, built in 1980. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 1,013 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 Lake Herman Mip #1
The primary purpose of Lake Herman Mip #1 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Lake Co. Consv. Dist. (local government). It impounds the Tr-lake Herman.
The dam stands 18 feet tall and stretches 1,013 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 450 acre-feet, and collects water from a drainage area of 2 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Lake |
| Nearest City | None |
| River/Stream | Tr-lake Herman |
| Coordinates | 43.98320, -97.19443 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 1,013 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 450 acre-ft |
| Max Storage | 450 acre-ft |
| Normal Storage | 192 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,310 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Lake Co. Consv. Dist. |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02180 |
| Federal ID | SD02180 |
| More Info | State Dam Safety Program |