Magic Spillway
Idaho — Blaine County — Big Wood River
Location
| State | Idaho |
| County | Blaine |
| River | Big Wood River |
| Coordinates | 43.25237, -114.36393 |
Physical Characteristics
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 1,200 ft |
| NID Storage | 195,000 acre-ft |
| Max Storage | 195,000 acre-ft |
| Surface Area | 3,740 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Fair |
| EAP Status | Yes |
| Last Inspection | April 15, 2026 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1910 |
| Primary Purpose | Hydroelectric |
| Dam Type | Concrete |
| Owner Type | Private |
| Owner | Big Wood Canal Company |
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.