Ostle is an earth dam located in Teton County, Montana, built in 1910. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 75 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 Ostle
The primary purpose of Ostle is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by State of Montana, D.f.w.p. (state). It impounds the Rinker Creek near Bynum.
The dam stands 12 feet tall and stretches 75 feet across, and has a maximum storage capacity of 166 acre-feet. Completed in 1910, the structure is over a century 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. The most recent inspection on record was 05/20/2024.
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Location
| State | Montana |
| County | Teton |
| Nearest City | Bynum |
| River/Stream | Rinker Creek |
| Coordinates | 47.95700, -112.63290 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 75 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 166 acre-ft |
| Max Storage | 166 acre-ft |
| Normal Storage | 166 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | State of Montana, D.f.w.p. |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/20/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03396 |
| Federal ID | MT03396 |
| More Info | State Dam Safety Program |