Located in Libby, Montana, the Kootenai Development Impoundment Dam, also known as the Zonolite Tailings Dam, is a privately owned structure that was completed in 1980.
Wind
Humidity
This earth dam stands at a height of 135 feet, with a hydraulic height of 147 feet and a structural height of 151 feet. With a storage capacity of 1302 acre-feet, the dam serves multiple purposes, including flood control and water storage, along the Rainy Creek.
Despite its importance in water resource management, the Kootenai Development Impoundment Dam has been flagged for its high hazard potential and poor condition assessment. The dam's last inspection in September 2020 revealed areas of concern, prompting the need for regular inspections and maintenance. Additionally, the dam lacks an Emergency Action Plan (EAP) and has a moderate risk assessment rating, indicating the need for improved risk management measures to ensure public safety and environmental protection. As climate change increases the frequency and intensity of extreme weather events, the importance of maintaining and improving the resilience of such critical infrastructure becomes even more crucial for the surrounding community.
Year Completed |
1980 |
Dam Length |
1154 |
Dam Height |
135 |
River Or Stream |
RAINY CREEK |
Primary Dam Type |
Earth |
Surface Area |
75 |
Hydraulic Height |
147 |
Drainage Area |
9.7 |
Nid Storage |
1302 |
Structural Height |
151 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
151 |
Kootenai River Bl Libby Dam Nr Libby Mt
|
22100cfs |
Fisher River Near Libby Mt
|
923cfs |
Yaak River Near Troy Mt
|
1540cfs |
Kootenai River At Leonia Id
|
27600cfs |
Tobacco River Near Eureka Mt
|
388cfs |
Clark Fork River Below Cabinet Gorge Dam Id
|
18300cfs |
| Location | Reservations | Toilets |
|---|---|---|
Timberlane
|
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Timberlane Campground
|
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Dunn Creek Flats
|
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Dunn Creek Campground
|
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McGillivray Campground
|
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McGillivray Campground and Group Sites
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