Mackay
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | Idaho |
| County | Custer |
| Nearest City | MACKAY |
| River/Stream | BIG LOST RIVER SINKS |
| Coordinates | 43.95270, -113.67320 |
Physical Characteristics
| NID Height | 75 ft |
| Dam Height | 75 ft |
| Dam Length | 1,430 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 45,000 acre-ft |
| Normal Storage | 45,000 acre-ft |
| Surface Area | 1,392 acres |
| Drainage Area | 788 sq mi |
| Max Discharge | 7,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 10/04/2019 |
| Emergency Action Plan | Yes |