Little Cache Structure 8 Dam, located in Johnson, Illinois, was completed in 1970 and is owned by the local government.
Wind
Humidity
Designed by USDA NRCS, this earth dam stands at a height of 21 feet and has a length of 820 feet. Its primary purpose is flood risk reduction, with a storage capacity of 242 acre-feet and a maximum discharge of 1692 cubic feet per second.
Managed by the Illinois Department of Natural Resources, the dam is regulated, permitted, inspected, and enforced by the state. With a significant hazard potential and a moderate risk assessment score of 3, the dam is deemed to meet guidelines for emergency action plans. Although the condition assessment is not available, the dam has undergone inspections every three years, with the last one conducted in November 2020. The spillway type is uncontrolled, with a width of 95 feet, and the outlet gates are also uncontrolled.
Little Cache Structure 8 Dam not only serves as a vital flood control structure but also provides opportunities for recreation. With its strategic location on the TRIB Little Cache Creek, this dam plays a crucial role in managing water resources in the area. For water resource and climate enthusiasts, the dam's design, operational details, and regulatory oversight make it an intriguing case study in sustainable water management practices.
Year Completed |
1970 |
Dam Length |
820 |
Dam Height |
21 |
River Or Stream |
TRIB LITTLE CACHE CREEK |
Primary Dam Type |
Earth |
Nid Storage |
242 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
| Location | Reservations | Toilets |
|---|---|---|
Camp Ondessonk
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Turkey Ridge Tent Campground
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Red Bud Campground
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Cedar Grove Camping Area
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