Drought Vulnerability of Illinois' Community Surface Water Systems, Illinois State Water Survey

Illinois Drought


System Information

System Description

Water is pumped from Pinckneyville Reservoir to the treatment plant at up to 1,000 gpm. A second intake on Beaucoup Creek is capable of pumping up to 3,500 mgd into Pinckneyville Reservoir when necessary. A 2.2 cfs downstream flow requirement limits withdrawals from Beaucoup Creek.

Satellite Communities and Water Districts

Consolidated 204 WD, Possum Branch WA
Locator map for Pinckneyville

Population Served:





Big Muddy
Water Source
Name Type Stream DA (sq mi) SA (ac) Capacity Year Est. Est. 2010 Cap. (ac-ft)
Pinckneyville Res. IR Opossum Cr 5.33 192 2020 1990 1873
Beaucoup Creek RW Beaucoup Cr 227

1989 Study:

50-year drought yield sufficient at present level of water use.

USGS Gages:

Beaucoup Creek near Matthews (05599000)

Developments since 1989:

A new 1.5 mgd treatment plant was constructed in 1999. An intake was constructed along Beaucoup Creek in 2002 to meet the demand of the new Ameren peaker plant and to protect the system against drought. This intake has been used only to fill the lake with a total of 26.5 million gallons during the 2005 drought.
Chart of Annual Raw Water Production (mgd)
Note: *Production has increased in recent years due to demands of the Ameren peaker plant.

Notes and Terminology

Vulnerability Report

Choose another Community

Illinois State Water Survey

2204 Griffith Dr., MC-674
Champaign, IL 61820-7463
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