Holter Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Lewis and Clark |
| Nearest City | Craig, MT |
| River/Stream | Missouri River |
| Coordinates | 46.99130, -112.00470 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 124 ft |
| Dam Height | 124 ft |
| Dam Length | 1,364 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 306,000 acre-ft |
| Max Storage | 306,000 acre-ft |
| Normal Storage | 245,000 acre-ft |
| Surface Area | 4,550 acres |
| Drainage Area | 17,150 sq mi |
| Max Discharge | 110,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | NorthWestern Energy |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/02/2021 |
| Emergency Action Plan | Yes |