Virgil Larson
Virgil Larson is an earth dam located in Wibaux County, Montana, built in 1977. It carries a Low hazard potential classification.
About Virgil Larson
The primary purpose of Virgil Larson is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Virgil D Larson (private). It impounds the Tr-rattlesnake Creek near Wibaux.
The dam stands 16 feet tall and stretches 800 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 210 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1977, the structure is 49 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 | Wibaux |
| Nearest City | Wibaux |
| River/Stream | Tr-rattlesnake Creek |
| Coordinates | 46.67793, -104.27098 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 800 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 210 acre-ft |
| Max Storage | 210 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,500 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | VIRGIL D LARSON |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01589 |
| Federal ID | MT01589 |
| More Info | State Dam Safety Program |