Lower Twin Lakes
Lower Twin Lakes is an earth dam located in Ravalli County, Montana, built in 1916. It carries a Low hazard potential classification.
About Lower Twin Lakes
The primary purpose of Lower Twin Lakes is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Charlos Irrigation Dist (private). It impounds the Lost Horse Creek near Hamilton.
The dam stands 20 feet tall and stretches 318 feet across, creates a reservoir covering 48 acres, has a maximum storage capacity of 345 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1916, 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.
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Location
| State | Montana |
| County | Ravalli |
| Nearest City | Hamilton |
| River/Stream | Lost Horse Creek |
| Coordinates | 46.15163, -114.49811 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 318 ft |
| Year Completed | 1916 (110 years old) |
Storage & Hydraulics
| NID Storage | 345 acre-ft |
| Max Storage | 345 acre-ft |
| Normal Storage | 146 acre-ft |
| Surface Area | 48 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 200 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Charlos Irrigation Dist |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01167 |
| Federal ID | MT01167 |
| More Info | State Dam Safety Program |