John Lane is an earth dam located in Teton County, Montana, built in 1952. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 375 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 John Lane
The primary purpose of John Lane is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Sophia Lane (private). It impounds the Tr-south Fork Willow Creek near Choteau.
The dam stands 20 feet tall and stretches 375 feet across, has a maximum storage capacity of 62 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1952, the structure is well into its service life at over 50 years old.
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 | Teton |
| Nearest City | Choteau |
| River/Stream | Tr-south Fork Willow Creek |
| Coordinates | 47.78140, -112.60800 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 375 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 62 acre-ft |
| Max Storage | 62 acre-ft |
| Normal Storage | 32 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 133 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Sophia Lane |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00386 |
| Federal ID | MT00386 |
| More Info | State Dam Safety Program |