D G Orchowski #1 is an earth dam located in Big Horn County, Montana, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 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 D G Orchowski #1
The primary purpose of D G Orchowski #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by John Hancock Mutual Life Ins (private). It impounds the Tr-little Bighorn River near Hardin.
The dam stands 30 feet tall and stretches 100 feet across, and has a maximum storage capacity of 57 acre-feet. Completed in 1963, 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 | Big Horn |
| Nearest City | Hardin |
| River/Stream | Tr-little Bighorn River |
| Coordinates | 45.64090, -107.44614 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 100 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 57 acre-ft |
| Max Storage | 57 acre-ft |
| Normal Storage | 33 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | John Hancock Mutual Life Ins |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01864 |
| Federal ID | MT01864 |
| More Info | State Dam Safety Program |