Jackson #1 is a significant earth dam located in Twin Bridges, Montana, along the Wisconsin Creek.
Wind
Humidity
Built in 1924 for irrigation purposes, this dam stands at a height of 19 feet and has a storage capacity of 38 acre-feet. It is regulated by the Montana Department of Natural Resources and Conservation, with state jurisdiction, permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.
With a controlled spillway and slide gate outlet gates, Jackson #1 has been deemed to have a significant hazard potential and a very high risk assessment rating. Despite its age, the dam's condition has not been formally assessed, but it remains operational and serves its intended purpose effectively. The dam has not undergone any modifications in recent years and is not owned or funded by any federal agencies, making it a unique and locally managed water resource structure in the area.
For water resource and climate enthusiasts, Jackson #1 offers a fascinating glimpse into the history and engineering of irrigation infrastructure in Montana. Its location in the beautiful Madison County, surrounded by natural landscapes, adds to its appeal as a point of interest for those interested in the management and conservation of water resources. As one of the older dams in the state, Jackson #1 serves as a reminder of the importance of maintaining and monitoring aging infrastructure to ensure the safety and sustainability of water systems for future generations.
Year Completed |
1924 |
Dam Length |
202 |
Dam Height |
19 |
River Or Stream |
WISCONSIN CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
16 |
Nid Storage |
38 |
Structural Height |
19 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Significant |
Nid Height |
19 |
| Location | Reservations | Toilets |
|---|---|---|
Branham Lakes
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Branham Lakes Campground and Picnic Area
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Mill Creek
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Balanced Rock
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Potosi Campground
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Potosi
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