Gray #3
Gray #3 is an earth dam located in Custer County, Montana, built in 1949. It carries a Low hazard potential classification.
About Gray #3
The primary purpose of Gray #3 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Robert J Gray (private). It impounds the Tr-ash Creek near Mildred.
The dam stands 26 feet tall and stretches 330 feet across, and has a maximum storage capacity of 300 acre-feet. Completed in 1949, the structure is well-established, with more than 75 years of service.
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 | Custer |
| Nearest City | Mildred |
| River/Stream | Tr-ash Creek |
| Coordinates | 46.50050, -104.95790 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 330 ft |
| Year Completed | 1949 (77 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Normal Storage | 182 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | ROBERT J GRAY |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01447 |
| Federal ID | MT01447 |
| More Info | State Dam Safety Program |