East Fork Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Fergus |
| Nearest City | LEWISTOWN |
| River/Stream | EAST FORK BIG SPRING CREEK |
| Coordinates | 46.98330, -109.28030 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 93 ft |
| Dam Height | 62 ft |
| Dam Length | 2,179 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 7,150 acre-ft |
| Max Storage | 7,150 acre-ft |
| Normal Storage | 1,700 acre-ft |
| Surface Area | 201 acres |
| Drainage Area | 60 sq mi |
| Max Discharge | 28,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | CITY OF LEWISTOWN |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/15/2020 |
| Emergency Action Plan | Yes |