Jessup Mill Pond Dam, located in Creston, Montana, is a Federal-owned structure with a primary purpose of water supply.
Wind
Humidity
Built in 1941 by URS Corporation, this Earth-type dam stands at a height of 27 feet and spans a length of 290 feet, creating a reservoir with a normal storage capacity of 205 acre-feet on Mill Creek. The dam has been modified in 2004 for foundation, hydraulic, seismic, and structural improvements.
Despite being deemed in satisfactory condition as of the last assessment in October 2019, Jessup Mill Pond Dam carries a high hazard potential and is classified as having a very high risk level. The dam is equipped with a controlled spillway and slide gate outlet gates, with a maximum discharge capacity of 2078 cubic feet per second. While the dam has not been regulated or inspected by the state, the Fish and Wildlife Service, the primary federal agency involved, is responsible for the dam's operation, design, construction, regulation, and inspection.
Given its critical role in water supply and the potential risk associated with its operation, Jessup Mill Pond Dam serves as a focal point for water resource and climate enthusiasts interested in understanding the complexities of managing and maintaining dams in a high-hazard environment. The dam's location in Flathead County, Montana, and its association with the Seattle District of the US Army Corps of Engineers further underline the importance of monitoring and ensuring the safety and stability of this vital infrastructure.
Years Modified |
2004 - Foundation, 2004 - Hydraulic, 2004 - Seismic, 2004 - Structural |
Year Completed |
1941 |
Dam Length |
290 |
Dam Height |
27 |
River Or Stream |
Mill Creek |
Primary Dam Type |
Earth |
Surface Area |
23 |
Hydraulic Height |
26 |
Drainage Area |
1.25 |
Nid Storage |
390 |
Structural Height |
28 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
28 |
| Location | Reservations | Toilets |
|---|---|---|
Doris Creek Campground
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Doris Creek
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Lost Johnny Campground
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Lost Johnny
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Wayfarers State Park
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Wayfarers State Park Campground
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