Portland
Michigan — Ionia County — Grand River
Location
| State | Michigan |
| County | Ionia |
| River | Grand River |
| Coordinates | 42.88910, -84.93080 |
Physical Characteristics
| NID Height | 15 ft |
| Dam Height | 9 ft |
| Dam Length | 680 ft |
| NID Storage | 186 acre-ft |
| Max Storage | 186 acre-ft |
| Surface Area | 30 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Satisfactory |
| EAP Status | Not Required |
| Last Inspection | July 20, 2022 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1919 |
| Primary Purpose | Hydroelectric |
| Dam Type | Gravity |
| Owner Type | Not Listed |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.