Data Sources and Collection
21
10
MILE
S
10
K
I
LOME
TE
RS
5
5
0
0
DU
P
A
GE
COUNTY
COOK
COUNTY
WILL
COUNTY
LAKE
COUNTY
COOK
COUNTY
Des
R
i
v
e
r
P
l
a
i
n
e
s
Chicago
Sanitary
and
Ship
Canal
Calumet
Sag
C
h
a
n
n
e
l
Salt
Creek
Little
Calumet
R
C
a
l
u
m
et
R
Cr
Willow
Higgins
Cr
Des
Plaines
River
North
Branch
C
h
i
c
a
g
o
River
South
B
ranch
Chicago
River
North
S
hore
C
hannel
South
H
olland
Chicago
W
ilmette
COOK
COUNTY
ILLINOIS
INDIANA
LAKE
MICHIGAN
Area
of
Enlargement
Grand
Calumet
R
MCHENR
Y
I
LLI
NO
I
S