Lone Tree is an earth dam located in Phillips County, Montana, built in 1946. It carries a Low hazard potential classification.
Dam profile
NID height · 17 ft17 ft tall and 300 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lone Tree
The primary purpose of Lone Tree is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Lloyd Knudsen (private). It impounds the Tr-beaver Creek near Saco.
The dam stands 17 feet tall and stretches 300 feet across, has a maximum storage capacity of 96 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1946, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Montana |
| County | Phillips |
| Nearest City | Saco |
| River/Stream | Tr-beaver Creek |
| Coordinates | 47.95540, -108.05100 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 300 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 96 acre-ft |
| Max Storage | 96 acre-ft |
| Normal Storage | 90 acre-ft |
| Drainage Area | 2 sq mi |
| Max Discharge | 500 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Lloyd Knudsen |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01327 |
| Federal ID | MT01327 |
| More Info | State Dam Safety Program |