Addison Mill Pond Dam
Addison Mill Pond Dam is an earth dam located in Lenawee County, Michigan, built in 1837. It carries a High hazard potential classification and has a fair condition assessment.
About Addison Mill Pond Dam
The primary purpose of Addison Mill Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Village Of Addison (local government). It impounds the Bean Creek near Addison.
The dam stands 25 feet tall and stretches 225 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 180 acre-feet, and collects water from a drainage area of 16 square miles. Completed in 1837, the structure is one of the older dams in the region, with over a century and a half of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 07/12/2019.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Michigan dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Michigan |
| County | Lenawee |
| Nearest City | Addison |
| River/Stream | Bean Creek |
| Coordinates | 41.98667, -84.34833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 225 ft |
| Year Completed | 1837 (189 years old) |
Storage & Hydraulics
| NID Storage | 180 acre-ft |
| Max Storage | 180 acre-ft |
| Normal Storage | 96 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 16 sq mi |
| Max Discharge | 305 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Village of Addison |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 07/12/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00710 |
| Federal ID | MI00710 |
| More Info | State Dam Safety Program |