Jappe is a privately owned irrigation dam located in Chouteau, Montana, along the Eightmile Coulee.
Wind
Humidity
Built in 1956 by the USDA NRCS, this Earth dam stands at 36 feet high with a hydraulic height of 32 feet and a length of 600 feet. With a storage capacity of 500 acre-feet and a drainage area of 7.03 square miles, Jappe serves the primary purpose of irrigation for the surrounding area.
Despite its age, Jappe has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. The dam is regulated and inspected by the Montana Department of Natural Resources and Conservation, ensuring that it meets state permitting and enforcement regulations. While there is no emergency action plan in place for Jappe, the risk assessment and management measures for potential hazards are yet to be determined.
Located in a remote area with no town nearby, Jappe stands as a testament to the importance of water resource management in Montana. With its historic significance and vital role in irrigation, this dam represents a crucial piece of infrastructure that contributes to the sustainability of agriculture in the region. For water resource and climate enthusiasts, Jappe serves as a fascinating example of how human intervention can shape and impact the natural landscape.
Year Completed |
1956 |
Dam Length |
600 |
Dam Height |
36 |
River Or Stream |
EIGHTMILE COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
32 |
Drainage Area |
7.03 |
Nid Storage |
500 |
Hazard Potential |
Low |
Nid Height |
36 |
Judith River Nr Mouth
|
368cfs |
Missouri River At Virgelle Mt
|
4290cfs |
Teton River At Loma Mt
|
48cfs |
Marias River Near Loma Mt
|
335cfs |
Missouri River At Fort Benton Mt
|
4360cfs |
Missouri River Near Landusky Mt
|
9100cfs |
| Location | Reservations | Toilets |
|---|---|---|
THE WALL
|
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SLAUGHTER RIVER
|
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PABLO RAPIDS (LOWER SITE)
|
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Judith Landing
|
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DARK BUTTE
|