Chessman Main Dam
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Lewis and Clark |
| Nearest City | RIMINI |
| River/Stream | BEAVER CREEK |
| Coordinates | 46.47053, -112.19312 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 57 ft |
| Dam Height | 57 ft |
| Dam Length | 440 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 2,370 acre-ft |
| Max Storage | 2,370 acre-ft |
| Normal Storage | 1,630 acre-ft |
| Surface Area | 114 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 30 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF HELENA |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 08/27/2020 |
| Emergency Action Plan | Yes |