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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

Population Served:

1078

County:

Marion

Watersheds:

Kaskaskia

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.