Hirschy is an earth dam located in Beaverhead County, Montana, built in 1967. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 2,100 ft long, taller than 68% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Hirschy
The primary purpose of Hirschy is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Jack Hirschy Livestock Inc. (private). It impounds the Tr-rock Creek near Wisdom.
The dam stands 30 feet tall and stretches 2,100 feet across, creates a reservoir covering 64 acres, and has a maximum storage capacity of 795 acre-feet. Completed in 1967, 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.
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Location
| State | Montana |
| County | Beaverhead |
| Nearest City | Wisdom |
| River/Stream | Tr-rock Creek |
| Coordinates | 45.53780, -113.61970 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 2,100 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 795 acre-ft |
| Max Storage | 795 acre-ft |
| Normal Storage | 734 acre-ft |
| Surface Area | 64 acres |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Jack Hirschy Livestock Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00529 |
| Federal ID | MT00529 |
| More Info | State Dam Safety Program |