Thorn
Thorn is an earth dam located in McCone County, Montana, built in 1971. It carries a Low hazard potential classification.
About Thorn
The primary purpose of Thorn is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Fred A Thoeny (private). It impounds the Tr-redwater River near Watkins.
The dam stands 10 feet tall and stretches 250 feet across, and has a maximum storage capacity of 92 acre-feet. Completed in 1971, 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 | McCone |
| Nearest City | Watkins |
| River/Stream | Tr-redwater River |
| Coordinates | 47.21470, -105.86830 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 250 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 92 acre-ft |
| Max Storage | 92 acre-ft |
| Normal Storage | 12 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | FRED A THOENY |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02702 |
| Federal ID | MT02702 |
| More Info | State Dam Safety Program |