Demontigny
Demontigny is an earth dam located in Phillips County, Montana, built in 1954. It carries a Low hazard potential classification.
About Demontigny
The primary purpose of Demontigny is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by U 2 Land Inc. (private). It impounds the Tr-whitewater Creek near Whitewater.
The dam stands 20 feet tall and stretches 200 feet across, has a maximum storage capacity of 82 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1954, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Montana |
| County | Phillips |
| Nearest City | Whitewater |
| River/Stream | Tr-whitewater Creek |
| Coordinates | 48.91971, -107.89059 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 82 acre-ft |
| Max Storage | 82 acre-ft |
| Normal Storage | 42 acre-ft |
| Drainage Area | 3 sq mi |
| Max Discharge | 150 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | U 2 LAND INC. |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01320 |
| Federal ID | MT01320 |
| More Info | State Dam Safety Program |