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*
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.
Note: *Hettick and the South Palmyra WD receive approximately half of their supply from Otter Lake.
Notes and Terminology
Vulnerability Report
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