Four Mile Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Michigan |
| County | Alpena |
| Nearest City | Alpena |
| River/Stream | Thunder Bay |
| Coordinates | 45.09270, -83.50260 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 700 ft |
| Year Completed | 1902 (124 years old) |
Storage & Hydraulics
| NID Storage | 900 acre-ft |
| Max Storage | 900 acre-ft |
| Normal Storage | 900 acre-ft |
| Surface Area | 90 acres |
| Drainage Area | 1,260 sq mi |
| Max Discharge | 29,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | Not Listed |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/24/2022 |
| Emergency Action Plan | Yes |