Station list     Available data
ILLINOIS RIVER BASIN


05535500       WEST FORK OF NORTH BRANCH CHICAGO RIVER AT NORTHBROOK, IL



LOCATION.-- Lat 42°08'18", long 87°50'04", in SW1/4SE1/4 sec.4, T.42 N., R.12 E., Cook County, Hydrologic Unit 07120003, on left bank at upstream side of bridge on State Highway 68 at Northbrook, and at mile 7.9.

DRAINAGE AREA.-- 11.5 mi2.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: August 1952 to current year.
 

STAGE: Water years 1994-2000.

GAGE.-- Water-stage recorder, and phone telemeter. Datum of gage is 637.98 ft above sea level (Cook County Highway Department bench mark).

REMARKS.-- Effluent from sewage-treatment plant 1.7 mi upstream.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. Effluent averaged about 4.7 ft3/s.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 11    2.9 1.4 2.9 3.2 14    6.0 29    41    2.0 24    1.6
2 10    3.2 1.4 3.0 3.2 10    5.6 24    43    24    9.4 1.8
3 41    3.1 4.4 3.4 3.2 7.3 5.4 21    15    129    4.9 2.1
4 28    2.6 9.3 8.0 3.2 6.5 5.4 22    11    30    3.5 2.1
5 11    2.4 107    6.1 3.1 5.5 5.8 21    86    13    6.6 2.1
 
6 8.5 2.3 24    4.6 2.9 4.4 6.1 21    29    7.1 5.9 1.9
7 6.2 2.1 10    4.0 2.9 3.7 13    21    17    4.4 4.3 1.9
8 5.3 2.1 7.3 3.7 2.9 3.6 33    23    12    3.0 2.7 3.0
9 4.2 2.1 5.7 6.7 3.5 3.6 30    66    7.4 2.5 2.4 2.2
10 4.0 2.1 5.3 12    5.3 3.2 22    48    7.0 131    2.2 2.0
 
11 3.9 2.0 3.8 9.5 6.6 2.8 18    66    39    76    2.4 83   
12 3.9 2.0 3.3 6.9 5.9 2.5 15    70    28    32    2.4 108   
13 5.1 1.9 3.3 5.4 5.1 2.6 13    50    29    14    2.1 22   
14 4.1 1.8 4.4 4.9 5.0 2.4 11    36    24    15    e1.8 35   
15 3.5 1.7 7.3 4.6 4.8 2.5 10    31    15    17    e2.0 15   
 
16 5.1 1.7 6.2 4.2 4.8 3.9 9.4 39    e12    5.1 e1.8 8.8
17 3.5 1.6 4.7 3.7 5.0 3.6 22    33    e9.0 4.4 e16    7.0
18 3.4 1.6 4.3 3.5 5.0 2.9 18    108    e7.4 4.0 13    6.5
19 3.0 1.8 3.8 e3.4 6.5 2.7 35    123    e19    4.5 5.2 6.0
20 2.9 2.0 e3.7 e3.3 7.9 19    217    57    20    2.7 e2.2 14   
 
21 3.6 2.0 e3.3 e3.2 10    18    180    40    13    2.7 e2.0 8.3
22 3.9 1.7 e3.1 e3.1 35    12    82    31    4.9 1.4 e1.7 79   
23 3.4 9.2 3.0 3.1 60    7.8 59    23    3.0 1.0 e1.6 124   
24 2.8 3.9 2.9 3.2 106    7.7 48    7.8 23    1.0 e1.6 39   
25 2.8 2.5 2.6 3.4 61    8.4 57    5.7 25    1.9 e1.5 17   
 
26 2.7 2.4 2.5 3.2 36    6.9 52    6.1 8.1 3.2 e1.6 9.4
27 2.7 2.1 2.6 2.8 28    7.1 28    11    4.8 4.2 e1.5 6.4
28 2.7 2.1 2.6 2.7 21    7.5 25    72    3.8 9.4 e2.3 6.2
29 2.8 2.1 2.7 2.7 17    7.3 25    18    3.7 6.1 e2.1 5.5
30 2.7 1.6 2.8 2.7 ---    6.9 23    11    2.4 4.1 2.0 4.6
 
31 3.0 ---    2.8 3.3 ---    6.2 ---    41    ---    81    1.8 ---   

TOTAL 200.7 72.6 251.5 137.2 464.0 202.5 1079.7 1175.6 562.5 636.7 134.5 625.4
MEAN 6.47 2.42 8.11 4.43 16.0 6.53 36.0 37.9 18.8 20.5 4.34 20.8
MAX 41 9.2 107 12 106 19 217 123 86 131 24 124
MIN 2.7 1.6 1.4 2.7 2.9 2.4 5.4 5.7 2.4 1.0 1.5 1.6
CFSM .56 .21 .71 .38 1.39 .57 3.13 3.30 1.63 1.79 .38 1.81
IN. .65 .23 .81 .44 1.50 .66 3.49 3.80 1.82 2.06 .44 2.02

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 2000, BY WATER YEAR (WY)
MEAN 8.33 11.1 12.0 9.96 14.0 23.1 25.7 15.9 14.3 11.3 10.7 10.0
MAX 23.1 40.4 51.2 40.0 43.2 86.6 57.3 67.3 41.6 59.2 57.5 50.0
(WY) 1987 1986 1983 1974 1997 1979 1983 1996 1978 1982 1987 1986
MIN .24 .34 .54 .38 1.04 3.01 6.58 4.61 1.51 .50 .47 .24
(WY) 1954 1954 1954 1954 1963 1956 1953 1953 1956 1956 1955 1952

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1952 - 2000
ANNUAL TOTAL 6088.0   5542.9  
ANNUAL MEAN 16.7   15.1   13.9  
HIGHEST ANNUAL MEAN 22.5   1993
LOWEST ANNUAL MEAN 2.96 1953
HIGHEST DAILY MEAN 239          Apr 23 217          Apr 20 753      Aug 14 1987
LOWEST DAILY MEAN 1.4       Dec 1, 2 1.0       Jul 23,24 .00 A
ANNUAL SEVEN-DAY MINIMUM 1.7       Nov 13 1.6       Aug 21 .00 Oct 27 1956
INSTANTANEOUS PEAK FLOW 361          Jul 2 1190      Aug 14 1987
INSTANTANEOUS PEAK STAGE 5.56     Jul 2 10.10 Aug 14 1987
INSTANTANEOUS LOW FLOW .84     Sep 1,2,6,7
ANNUAL RUNOFF (CFSM) 1.45 1.32 1.21
ANNUAL RUNOFF (INCHES) 19.69 17.93 16.40
10 PERCENT EXCEEDS 36      39      29     
50 PERCENT EXCEEDS 6.5   5.1   6.0  
90 PERCENT EXCEEDS 2.7   2.0   1.8  
A - At times in several years.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data