Station list     Available data
ILLINOIS RIVER BASIN


05548500       FOX RIVER AT JOHNSBURG, IL



LOCATION.-- Lat 42°22'35", long 88°14'15", in SW1/4SW1/4 sec.18, T.45 N., R.9 E., McHenry County, Hydrologic Unit 07120006, on left bank at upstream side of bridge on Chapel Hill Road in Johnsburg, 5.5 mi upstream from Stratton Lock and Dam (previously known as McHenry Dam), and at mile 103.0.

DRAINAGE AREA.-- 1,205 mi2.

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

DISCHARGE: December 1997 to August 1999.
 

STAGE: October 1939 to current year.
SURFACE-WATER QUALITY
 

SEDIMENT: December 1997 to May 1999.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 733.00 ft above sea level (levels by Illinois Department of Transportation). Oct. 1, 1939 to Dec. 14, 1939, nonrecording gage at same site at datum 2.16 ft higher. Dec. 14, 1939, to Sept. 30, 1971, at datum 2.16 ft higher.

REMARKS.-- Stage regulated by Stratton Lock and Dam, 5.5 mi downstream from station (previously known as McHenry Dam). Suspended-sediment samples were collected twice weekly with more frequent samples collected during high runoff periods.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum recorded discharge, 4,780 ft3/s, June 17, 1999, gage height, 5.91 ft; maximum gage height, 7.55 ft, present datum, April 6, 1960, discharge unknown; minimum recorded discharge, -1,300 ft3/s, June 25, 1998.
SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily, 420 mg/L, May 17, 1999; minimum daily, 2 mg/L, Jan. 20 to Feb. 3, 1998.
SUSPENDED-SEDIMENT LOAD: Maximum daily, 1,680 tons, May 17, 1999; minimum daily, 5.1 tons, Jan. 25 to Jan. 27, 1998.

EXTREMES FOR CURRENT YEAR.-- Maximum gage height, 6.12 ft, June 16; minimum, 2.03 ft, Dec. 29.
GAGE HEIGHT, FEET, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 4.28 3.95 2.44 2.21 2.71 3.59 4.10 4.42 5.04 4.23 4.21 4.13
2 4.26 3.98 2.45 2.22 2.67 3.55 4.09 4.37 5.16 4.30 4.23 4.09
3 4.25 3.94 2.44 2.34 2.67 3.43 4.06 4.32 5.33 4.55 4.19 4.07
4 4.20 3.88 2.55 2.36 2.69 3.31 4.08 4.25 5.46 4.68 4.12 4.11
5 4.08 3.87 2.76 2.38 2.65 3.26 4.01 4.27 5.58 4.79 4.14 4.09
 
6 4.16 3.89 2.74 2.36 2.65 3.16 3.97 4.21 5.50 4.70 4.19 4.02
7 4.13 3.86 2.70 2.41 2.66 3.07 4.18 4.25 5.39 4.60 4.24 3.96
8 4.10 3.80 2.71 2.36 2.62 3.11 4.11 4.20 5.25 4.51 4.24 4.02
9 4.16 3.68 2.72 2.47 2.63 3.15 4.06 4.34 5.10 4.47 4.27 3.94
10 4.14 3.77 2.71 2.44 2.67 3.38 4.16 4.33 4.94 4.65 4.26 3.94
 
11 4.16 3.74 2.68 2.49 2.65 3.46 4.16 4.41 4.96 4.70 4.28 4.03
12 4.09 3.62 2.68 2.67 2.63 3.47 4.18 4.52 --- 4.71 4.22 4.23
13 4.14 3.56 2.65 2.69 2.67 3.51 4.17 4.50 --- 4.68 4.18 4.29
14 4.11 3.58 2.63 2.69 2.66 3.53 4.15 4.55 5.80 4.59 4.21 4.41
15 4.05 3.52 2.54 2.69 2.63 3.64 4.23 4.54 6.02 4.47 4.21 4.42
 
16 4.10 3.48 2.48 2.77 2.65 3.79 4.28 4.48 6.06 --- 4.22 4.40
17 4.10 3.38 2.54 2.79 2.66 3.79 4.27 4.43 6.04 --- 4.26 4.38
18 4.09 3.25 2.50 2.79 2.74 3.82 4.18 4.61 5.83 --- 4.27 4.41
19 4.05 3.13 2.49 2.82 2.71 3.93 4.23 4.81 5.60 4.29 4.28 4.38
20 4.05 3.18 2.43 2.81 2.71 3.98 4.36 4.98 5.34 4.20 4.27 4.40
 
21 4.00 3.12 2.43 2.78 2.73 4.01 4.52 5.25 5.08 4.18 4.28 4.36
22 4.04 3.03 2.42 2.79 2.77 4.04 4.64 5.42 4.85 4.20 4.28 4.38
23 4.05 2.87 2.39 2.78 2.92 4.09 4.83 5.49 4.66 4.16 4.30 4.60
24 3.99 2.81 2.38 2.77 3.15 4.09 4.91 5.43 4.48 4.14 4.26 4.69
25 3.91 2.83 2.28 2.77 3.28 4.03 4.91 5.38 4.36 4.12 4.23 4.71
 
26 3.98 2.72 2.30 2.76 3.35 4.09 4.86 5.30 4.32 4.09 4.24 4.70
27 3.98 2.69 2.30 2.74 3.50 4.11 4.79 5.25 4.29 4.10 4.22 4.71
28 3.98 2.63 2.22 2.73 3.66 4.17 4.71 5.19 4.27 4.12 4.19 4.63
29 3.97 2.58 2.17 2.72 3.60 4.16 4.65 5.13 4.27 4.13 4.18 4.48
30 3.91 2.54 2.23 2.73 --- 4.15 4.48 5.04 4.25 4.11 4.17 4.41
 
31 3.98 --- 2.21 2.70 --- 4.11 --- 5.02 --- 4.18 4.11 ---

MEAN 4.08 3.36 2.49 2.61 2.84 3.71 4.34 4.73 --- --- 4.22 4.31
MAX 4.28 3.98 2.76 2.82 3.66 4.17 4.91 5.49 --- --- 4.30 4.71
MIN 3.91 2.54 2.17 2.21 2.62 3.07 3.97 4.20 --- --- 4.11 3.94


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data