County Road 109 is a rockfill dam located in Lincoln County, Minnesota. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 460 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 rockfill embankment section and the water level is illustrative.
About County Road 109
The primary purpose of County Road 109 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 County of Lincoln (local government). It impounds the Yellow Med N Branch-tr near Porter.
The dam stands 25 feet tall and stretches 460 feet across, has a maximum storage capacity of 147 acre-feet, and collects water from a drainage area of 6 square miles.
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 05/07/2019.
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Location
| State | Minnesota |
| County | Lincoln |
| Nearest City | Porter |
| River/Stream | Yellow Med N Branch-tr |
| Coordinates | 44.59384, -96.23584 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 460 ft |
Storage & Hydraulics
| NID Storage | 147 acre-ft |
| Max Storage | 147 acre-ft |
| Drainage Area | 6 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lincoln |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/07/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01789 |
| Federal ID | MN01789 |
| More Info | State Dam Safety Program |