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

Illinois Drought


System Information

System Description

New Kinmundy Reservoir, the primary source, pumps water directly to the treatment plant at up to 120 gpm. Old Kinmundy Reservoir and the Kinmundy Borrow Pit are used only during emergencies. Old Kinmundy Reservoir upstream is now used as a settling basin for New Kinmundy Reservoir. Forbes State Park uses up to 150,000 gallons per month during the summer.

Satellite Communities and Water Districts

Forbes State Park
Locator map for Kinmundy

Population Served:





Water Source
Name Type Stream DA (sq mi) SA (ac) Capacity Year Est. Est. 2010 Cap. (ac-ft)
New Kinmundy Res. IR E Fk Kaskaskia Trib 1.4 107.33 1228 1998 1212.1
Old Kinmundy Res. IR E Fk Kaskaskia Trib 149 1959
Kinmundy Borrow Pit undy Borrow Pit QBP E Fk Kaskaskia Trib 10 200 1989 200

1989 Study:

50-year drought yield insufficient at 2020 level of water use.

USGS Gages:

No data available

Developments since 1989:

New Kinmundy Reservoir came online in 1998. Old Kinmundy Reservoir was lowered 4 feet for a wetlands program and now is used as a settling basin. Kinmundy Borrow Pit was taken offline in 2006. These latter two sources are still available during emergencies. The new lake's large storage capacity has allowed for summer bulk water sales at rates up to 0.05 mgd.
Chart of Annual Raw Water Production (mgd)
Note: *The loss of the Alma satellite (pop. ~350) has diminished recent production.

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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