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Watershed Descriptions
Program Area Description.
Salt Creek Watershed
The Salt Creek watershed
encompasses 152 square miles of highly urbanized land in
western Cook and eastern DuPage Counties. It has a
number of tributaries of which the largest are Addison
Creek and Spring Brook. The main stem of Salt Creek is
approximately 42 linear miles and has a rise of 225
feet. Salt Creek flows into the Des Plaines River in
Lyons, which is tributary to the Illinois River. There
are 40 municipalities located within the watershed and
11 publicly owned treatment plants discharge effluent to
Salt Creek. Additionally, 6 combined sewer overflow
outfalls are present. Land uses in the Salt Creek
watershed are shown in the land use summary table.
Measured at the USGS station at Western Springs (station
05531500), annual mean flow for the river is 135 cfs
(calculated from data for water years 1946-2004).
East Branch DuPage River
Watershed
The East Branch DuPage
River watershed encompasses 81 square miles of central
DuPage and northern Will Counties. The major tributaries
are St. Joseph and Prentiss Creeks. The main stem of the
East Branch is approximately 26 linear miles. The East
Branch joins the West Branch of the DuPage River on the
Bolingbrook municipal line to form the main stem of the
DuPage River. The DuPage is a tributary to the Des
Plains River. Sixteen municipalities are located within
the watershed. A total of 11 publicly owned treatment
plants discharge to the East Branch as does one combined
sewer overflow. The land uses found in the East Branch
watershed are mostly residential and urban and are given
in the land use summary table. Measured at the USGS
station at Bolingbrook (station 05540250)
, annual mean flow for the river is 109 cfs (calculated
from data for water years 1989-2004).
West Branch DuPage River
Watershed
The West Branch DuPage
River watershed encompasses 128 square miles of DuPage,
Cook and Northern Will Counties. The main stem of the
West Branch measures 34 linear miles in length. There
are 21 municipalities in the watershed and 7 publicly
owned treatment plants discharge to the West Branch.
There are no combined sewer overflows in the watershed.
Residential and urban uses dominate and are summarized
in the land use summary table. Annual Mean flow for the
river at Naperville (USGS station
05540130) is 154 cfs (calculated from data for water
years 1989 -2004.
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