Magic Spillway
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | Idaho |
| County | Blaine |
| Nearest City | Shoshone, ID |
| River/Stream | Big Wood River |
| Coordinates | 43.25237, -114.36392 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 195,000 acre-ft |
| Max Storage | 195,000 acre-ft |
| Normal Storage | 191,500 acre-ft |
| Surface Area | 3,740 acres |
| Drainage Area | 1,600 sq mi |
| Max Discharge | 100,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Big Wood Canal Company |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/30/2025 |
| Emergency Action Plan | Yes |