Petri
Petri is an earth dam located in Blaine County, Montana, built in 1939. It carries a Low hazard potential classification.
About Petri
The primary purpose of Petri is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Louie Petrie (private). It impounds the Woody Island Coulee near Loring.
The dam stands 8 feet tall and stretches 300 feet across, and has a maximum storage capacity of 141 acre-feet. Completed in 1939, 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.
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Location
| State | Montana |
| County | Blaine |
| Nearest City | Loring |
| River/Stream | Woody Island Coulee |
| Coordinates | 48.92900, -108.34700 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 300 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 141 acre-ft |
| Max Storage | 141 acre-ft |
| Normal Storage | 59 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LOUIE PETRIE |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00242 |
| Federal ID | MT00242 |
| More Info | State Dam Safety Program |