Mystic Dike
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Stillwater |
| Nearest City | Fishtail, MT |
| River/Stream | West Rosebud Creek |
| Coordinates | 45.22547, -109.76232 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 17 ft |
| Dam Length | 145 ft |
| Year Completed | 1927 (99 years old) |
Storage & Hydraulics
| NID Storage | 21,000 acre-ft |
| Max Storage | 21,000 acre-ft |
| Normal Storage | 20,800 acre-ft |
| Surface Area | 446 acres |
| Drainage Area | 52 sq mi |
| Max Discharge | 5,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | NorthWestern Energy |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/30/2020 |
| Emergency Action Plan | Yes |