Farleys #1 is an earth dam located in Rosebud County, Montana, built in 1940. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 150 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 Farleys #1
The primary purpose of Farleys #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Farleys Inc (private). It impounds the Trail Creek near Forsyth.
The dam stands 20 feet tall and stretches 150 feet across, has a maximum storage capacity of 62 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1940, 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 | Rosebud |
| Nearest City | Forsyth |
| River/Stream | Trail Creek |
| Coordinates | 45.94390, -106.91700 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 150 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 62 acre-ft |
| Max Storage | 62 acre-ft |
| Normal Storage | 32 acre-ft |
| Drainage Area | 3 sq mi |
| Max Discharge | 800 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Farleys Inc |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01846 |
| Federal ID | MT01846 |
| More Info | State Dam Safety Program |