Tongue River Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Big Horn |
| Nearest City | ASHLAND |
| River/Stream | TONGUE RIVER |
| Coordinates | 45.13250, -106.76963 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 93 ft |
| Dam Height | 93 ft |
| Dam Length | 1,824 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 127,655 acre-ft |
| Max Storage | 127,655 acre-ft |
| Normal Storage | 79,071 acre-ft |
| Surface Area | 3,700 acres |
| Drainage Area | 1,760 sq mi |
| Max Discharge | 98,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | STATE WATER PROJECTS |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/03/2024 |
| Emergency Action Plan | Yes |