Ryan
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Cascade |
| Nearest City | Fort Benton |
| River/Stream | Missouri River |
| Coordinates | 47.56880, -111.12510 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 82 ft |
| Dam Height | 61 ft |
| Dam Length | 1,465 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 3,653 acre-ft |
| Max Storage | 3,613 acre-ft |
| Normal Storage | 3,653 acre-ft |
| Surface Area | 168 acres |
| Drainage Area | 23,080 sq mi |
| Max Discharge | 188,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | NorthWestern Energy |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/18/2022 |
| Emergency Action Plan | Yes |