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.--August 1952 to current year.

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

REMARKS.--Records good except those for estimated daily discharges, which are poor. Effluent from sewage-treatment plant, 1.7 mi upstream, averaged about 5.13 ft3/s per day, with a maximum monthly average of 7.84 ft3/s in April and a minimum of 3.36 ft3/s in July. Gage-height telemeter at station.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 5.3 8.7 9.9 e4.0 e18    9.5 3.6 31    36    18    5.9 e5.0
2 8.9 7.6 6.3 e4.0 e35    14    3.3 25    56    6.5 5.9 e4.5
3 12    7.0 6.4 e4.0 e56    13    3.8 7.5 18    5.4 6.0 e4.2
4 5.0 13    7.0 e4.1 34    8.8 5.1 11    9.3 4.8 5.7 e4.0
5 52    8.6 6.0 e4.1 34    7.7 4.5 11    7.4 4.5 5.8 e3.6
 
6 19    7.2 52    e4.1 30    11    4.9 22    8.2 4.6 4.3 e5.0
7 11    5.7 55    e4.0 25    11    3.5 12    18    5.9 e4.0 e4.7
8 7.5 8.2 18    e3.9 20    9.2 34    8.2 8.7 7.2 e4.2 e3.9
9 6.9 8.8 13    e4.2 20    9.9 184    6.8 6.2 11    e4.0 e3.9
10 5.5 129    10    e4.1 18    13    51    6.2 11    6.5 e3.8 7.0
 
11 4.9 48    9.0 e4.0 28    15    24    11    19    3.8 e3.6 6.6
12 5.0 19    7.9 e4.0 20    16    16    70    8.6 3.9 5.2 9.3
13 5.0 15    6.9 e4.0 12    13    16    19    150    4.0 6.1 9.2
14 4.6 13    e6.6 e3.8 9.1 13    17    11    87    3.8 4.6 7.1
15 4.8 9.0 e6.4 e5.0 8.5 16    33    7.2 42    4.7 e6.0 6.9
 
16 4.6 9.7 e6.2 e8.0 8.9 31    147    6.1 31    4.2 e10    6.9
17 155    9.4 6.0 e16    8.1 75    47    19    37    6.1 e25    6.8
18 156    7.0 5.9 19    6.9 47    23    14    32    3.9 e40    6.3
19 41    6.7 5.3 11    6.3 22    28    9.0 16    5.6 64    6.7
20 24    6.5 4.9 9.5 5.5 16    34    5.7 6.4 5.9 16    8.2
 
21 16    5.7 e4.8 19    4.8 11    56    9.6 6.9 6.1 8.7 18   
22 9.7 5.6 e4.6 190    4.6 9.6 212    8.6 9.7 5.9 7.0 8.1
23 7.7 5.8 4.6 192    4.4 9.7 239    7.3 9.0 26    5.8 7.0
24 6.2 5.4 4.6 130    4.5 8.5 76    5.1 9.4 18    19    6.4
25 5.4 5.7 4.4 76    6.0 7.8 53    4.4 8.4 8.6 23    6.0
 
26 6.0 5.5 4.4 e72    8.2 5.6 68    3.5 4.7 8.1 13    6.4
27 21    4.9 4.4 e70    18    4.8 79    3.5 5.1 7.3 8.4 13   
28 17    4.7 e4.5 57    14    4.4 110    3.0 5.8 6.2 6.8 106   
29 26    4.7 e4.5 34    ---    4.1 53    2.7 5.7 6.5 5.7 51   
30 20    18    e4.4 28    ---    3.8 39    2.5 4.6 6.6 4.7 15   
 
31 9.7 ---    e4.2 e23    ---    3.5 ---    8.5 ---    6.2 e4.8 ---   

TOTAL 682.7 413.1 298.1 1015.8 467.8 443.9 1667.7 371.4 677.1 225.8 337.0 356.7
MEAN 22.0 13.8 9.62 32.8 16.7 14.3 55.6 12.0 22.6 7.28 10.9 11.9
MAX 156 129 55 192 56 75 239 70 150 26 64 106
MIN 4.6 4.7 4.2 3.8 4.4 3.5 3.3 2.5 4.6 3.8 3.6 3.6
CFSM 1.92 1.20 .84 2.85 1.45 1.25 4.83 1.04 1.96 .63 .95 1.03
IN. 2.21 1.34 .96 3.29 1.51 1.44 5.39 1.20 2.19 .73 1.09 1.15

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 1999, BY WATER YEAR (WY)
MEAN 8.37 11.3 12.1 10.1 14.0 23.5 25.4 15.5 14.3 11.1 10.8 9.79
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 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1952 - 1999
ANNUAL TOTAL 6925.0   6957.1  
ANNUAL MEAN 19.0   19.1   13.8  
HIGHEST ANNUAL MEAN 22.5   1993
LOWEST ANNUAL MEAN 2.96 1953
HIGHEST DAILY MEAN 207          Mar 18 239          Apr 23 753      Aug 14 1987
LOWEST DAILY MEAN 2.8       Aug 2 2.5       May 30 .00 A
ANNUAL SEVEN-DAY MINIMUM 3.0       Jul 12 3.5       May 24 .00 Oct 27 1956
INSTANTANEOUS PEAK FLOW 522          Apr 23 1190      Aug 14 1987
INSTANTANEOUS PEAK STAGE 7.05     Apr 23 10.10 Aug 14 1987
INSTANTANEOUS LOW FLOW 1.5       May 31
ANNUAL RUNOFF (CFSM) 1.65 1.66 1.20
ANNUAL RUNOFF (INCHES) 22.40 22.50 16.36
10 PERCENT EXCEEDS 48      47      29     
50 PERCENT EXCEEDS 8.9   7.9   6.0  
90 PERCENT EXCEEDS 3.8   4.1   1.8  
A - At times in several years.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data