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

Illinois Drought

Palmyra-Modesto

System Information

System Description

The community directly receives water from Palmyra-Modesto Lake at up to 200 gpm. Terry Park Lake, located immediately upstream, serves as a sedimentation basin. There is an emergency connection with Otter Lake, but it is difficult to activate the connection's check valve.

Satellite Communities and Water Districts

Hettick*, Scottville Rural Water, and South Palmyra*
Locator map for Palmyra-Modesto

Population Served:

1735

County:

Macoupin

Watersheds:

Macoupin
Water Source
Name Type Stream DA (sq mi) SA (ac) Capacity Year Est. Est. 2010 Cap. (ac-ft)
Palmyra-Modesto Lk IR Nassa Cr Trib 1.7 35 533.9 1965 470.6

1989 Study:

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

USGS Gages:

No data available

Developments since 1989:

Drought restrictions were considered in 2005 but never implemented. The dam was raised 14 inches during the 1980s. Terry Park Lake (2-3 ac), immediately upstream of the reservoir, was dredged in 1990. The 0.25 mgd treatment plant is around 40 years old. A 1 mgd hog operation closed in 1996, but S Palmyra and Hettick have recently began purchasing water from the system.
Chart of Annual Raw Water Production (mgd)
Note: *Hettick and the South Palmyra WD receive approximately half of their supply from Otter Lake.

Notes and Terminology

Vulnerability Report

Choose another Community

Illinois State Water Survey

2204 Griffith Dr
Champaign, IL 61820-7463
217-244-5459
info@isws.illinois.edu

Terms of use. Email the Web Administrator with questions or comments.

© 2017 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois State Water Survey.
Site Map