Willo's Lake Dam
Willo's Lake Dam is an earth dam located in Washtenaw County, Michigan. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Willo's Lake Dam
The primary purpose of Willo's Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Willow Lake Association (private). It impounds the Tributary To River Raisin near Manchester.
The dam stands 7 feet tall and stretches 420 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 67 acre-feet, and collects water from a drainage area of 5 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 11/10/2017.
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Location
| State | Michigan |
| County | Washtenaw |
| Nearest City | Manchester |
| River/Stream | Tributary To River Raisin |
| Coordinates | 42.15417, -84.06433 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 420 ft |
Storage & Hydraulics
| NID Storage | 67 acre-ft |
| Max Storage | 67 acre-ft |
| Normal Storage | 27 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 547 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Willow Lake Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/10/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI02376 |
| Federal ID | MI02376 |
| More Info | State Dam Safety Program |