Structure No.
Wind
Humidity
12, also known as Dutchman Lake, is a federal-owned dam located in Johnson County, Illinois. Managed by the USDA NRCS, this earth dam was completed in 1974 for the primary purposes of recreation and water supply. With a height of 54 feet and a length of 1450 feet, the dam provides a maximum storage capacity of 4432 acre-feet and serves a drainage area of 11 square miles.
The dam's spillway type is controlled with a width of 300 feet, and the outlet gates are equipped with valves for water release. Despite being classified as having a significant hazard potential and a very high risk assessment level, the dam's condition assessment is currently listed as not rated. The last inspection was conducted in September 2016, with no specific inspection frequency provided.
This structure, situated along Dutchman Creek, is under the regulation of the IDNR and the Forest Service, with funding and construction support from various federal agencies. As a popular recreational spot in the area, Structure No. 12 plays a crucial role in water supply management and offers opportunities for outdoor activities amid its natural surroundings.
Year Completed |
1974 |
Dam Length |
1450 |
Dam Height |
54 |
River Or Stream |
DUTCHMAN CREEK |
Primary Dam Type |
Earth |
Surface Area |
186 |
Hydraulic Height |
35 |
Drainage Area |
11 |
Nid Storage |
4432 |
Structural Height |
51 |
Outlet Gates |
Valve |
Hazard Potential |
Significant |
Nid Height |
54 |
| Location | Reservations | Toilets |
|---|---|---|
Camp Ondessonk
|
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Red Bud Campground
|
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Teal Pond Campground
|
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Cedar Grove Camping Area
|
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Bear Branch Horse Resort
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