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

Illinois Drought


System Information

System Description

Two intakes on New Gillespie Lake pump water to the treatment plant at up to 1.4 mgd. The pumping station design allows for the operating pool to be raised up to 12 feet. Old Gillespie Lake can be accessed as an emergency source with portable pumps.

Satellite Communities and Water Districts

Benld, Dorchester, Eagerville, Lake Kaho WD, Mount Clare, Sawyerville, and Wilsonville
Locator map for Gillespie

Population Served:





Water Source
Name Type Stream DA (sq mi) SA (ac) Capacity Year Est. Est. 2010 Cap. (ac-ft)
New Gillespie Lake IR Dry Fk 12.25 203 1886 1980 1790.8
Old Gillespie Lake IR Dry Fk 5.73 72 500 1980 418.9

1989 Study:

50-year drought yield insufficient at 1990 level of water use.

USGS Gages:

No data available

Developments since 1989:

The line to Old Gillespie Lake was abandoned in 2003. However, the lake is still accessible with portable pumps during emergencies.
Chart of Annual Raw Water Production (mgd)

Notes and Terminology

Vulnerability Report

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Illinois State Water Survey

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