Flat Retention Dam / Mister Bill Dam
Low HazardUnsatisfactory ConditionEmergency Action Plan: Not Required
Location
| State | Montana |
| County | Phillips |
| Nearest City | SACO |
| River/Stream | BEAVER CK./MILK RIVER |
| Coordinates | 47.93900, -107.82742 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 16 ft |
| Dam Length | 1,553 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 1,537 acre-ft |
| Max Storage | 1,537 acre-ft |
| Surface Area | 181 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 08/16/2016 |
| Emergency Action Plan | Not Required |