LOCATION.-- Lat 42°00'44", long 87°47'44" (NAD of 1927), in SW1/4SE1/4 sec.30, T.41 N., R.13 E., Cook County, Hydrologic Unit 07120003, on right bank at downstream side of bridge on Touhy Avenue in Niles, 3.6 mi downstream from West Fork of North Branch, 7.9 mi upstream from North Shore Channel, and at mile 51.4. |
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DRAINAGE AREA.-- 100 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1950 to current year. Prior to October 1952, records published with those for streams in the St. Lawrence River basin (WSP 1207, 1237). |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978 to 1991. Additional chemical data for water years 1972-77 are published in Water-Resources Investigations 78-22 and 79-23 as site HCC 07. |
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SEDIMENT: October 1984 to September 1986. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 601.99 ft above NGVD of 1929. |
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REMARKS.-- Diurnal fluctuation at low flow caused by sewage-treatment plants. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,590 ft3/s, Aug. 14, 1987, gage height, 11.35 ft; minimum daily discharge, .10 ft3/s, Sept. 30, 1953. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 285 mg/L July 15, 1985; minimum daily mean, 2 mg/L Jan. 23 to Feb. 21, 1985, and Jan. 30-31, 1986. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 566 tons July 8, 1986; minimum daily, 0.14 ton Jan. 29, Jan. 31 to Feb. 4, Feb. 6-11, 15-19, 1985. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 56 | 23 | 29 | 28 | e29 | 23 | 63 | 1040 | 143 | 31 | 54 | 53 |
2 | 86 | 23 | 30 | 25 | e31 | 22 | 56 | 882 | 105 | 28 | 80 | 36 |
3 | 70 | 23 | 32 | 27 | 32 | 22 | 62 | 596 | 103 | 28 | 198 | 26 |
4 | 179 | 21 | 31 | 26 | 33 | 26 | 380 | 421 | 79 | 26 | 99 | 23 |
5 | 202 | 25 | 31 | 26 | 29 | 25 | 589 | 832 | 65 | 134 | 53 | 22 |
6 | 84 | 30 | 29 | 27 | 26 | 27 | 311 | 694 | 73 | 176 | 44 | 22 |
7 | 64 | 27 | 28 | 28 | 26 | 28 | 222 | 457 | 56 | 454 | 41 | 20 |
8 | 57 | 23 | 26 | 29 | e25 | 30 | 227 | 261 | 95 | 337 | 43 | 19 |
9 | 54 | 25 | 25 | 28 | e24 | 28 | 205 | 852 | 109 | 311 | 49 | 20 |
10 | 56 | 29 | 46 | 27 | 23 | 26 | 248 | 680 | 70 | 248 | 33 | 21 |
11 | 50 | 25 | 35 | 25 | e23 | 29 | 183 | 706 | 56 | 173 | 29 | 21 |
12 | 38 | 37 | 30 | 33 | e23 | 34 | 137 | 724 | 50 | 135 | 28 | 21 |
13 | 33 | 30 | 25 | 23 | e23 | 52 | 106 | 521 | 48 | 91 | 24 | 27 |
14 | 30 | 29 | 25 | 24 | e24 | 60 | 91 | 406 | 45 | 74 | 24 | 85 |
15 | 34 | 34 | 25 | 29 | e24 | 88 | 80 | 431 | 41 | 338 | 24 | 107 |
16 | 37 | 32 | 24 | 27 | 24 | 100 | 69 | 277 | 38 | 229 | 25 | 54 |
17 | 28 | 32 | 24 | 27 | e24 | 88 | 60 | 210 | 38 | 188 | 24 | 40 |
18 | 32 | 34 | 168 | 29 | e24 | 75 | 55 | 176 | 68 | 266 | 21 | 31 |
19 | 26 | 57 | 198 | 29 | e24 | 67 | 50 | 148 | 82 | 128 | 22 | 25 |
20 | 21 | 51 | 111 | e28 | 24 | 86 | 50 | 134 | 68 | 104 | 22 | 23 |
21 | 20 | 57 | 75 | e27 | 24 | 106 | 46 | 128 | 53 | 186 | 22 | 19 |
22 | 21 | 66 | 55 | e27 | 24 | 90 | 44 | 106 | 45 | 94 | 20 | 42 |
23 | 20 | 49 | 43 | e28 | 21 | 75 | 38 | 93 | 45 | 85 | 20 | 37 |
24 | 23 | 41 | 38 | e30 | 22 | 67 | 33 | 81 | 48 | 69 | 18 | 27 |
25 | 43 | 35 | 35 | e29 | e22 | 84 | 36 | 69 | 44 | 59 | 19 | 23 |
26 | 44 | 35 | 32 | e28 | e23 | 81 | 33 | 61 | 39 | 51 | 25 | 49 |
27 | 31 | 35 | 30 | e27 | e23 | 69 | 32 | 57 | 30 | 43 | 24 | 81 |
28 | 27 | 34 | 28 | e26 | 23 | 103 | 31 | 122 | 29 | 40 | 21 | 45 |
29 | 26 | 33 | 26 | e26 | --- | 130 | 32 | 291 | 33 | 38 | 21 | 33 |
30 | 25 | 34 | 28 | e27 | --- | 84 | 165 | 160 | 34 | 35 | 21 | 30 |
31 | 25 | --- | 29 | e28 | --- | 69 | --- | 175 | --- | 29 | 21 | --- |
TOTAL | 1542 | 1029 | 1391 | 848 | 697 | 1894 | 3734 | 11791 | 1832 | 4228 | 1169 | 1082 |
MEAN | 49.7 | 34.3 | 44.9 | 27.4 | 24.9 | 61.1 | 124 | 380 | 61.1 | 136 | 37.7 | 36.1 |
MAX | 202 | 66 | 198 | 33 | 33 | 130 | 589 | 1040 | 143 | 454 | 198 | 107 |
MIN | 20 | 21 | 24 | 23 | 21 | 22 | 31 | 57 | 29 | 26 | 18 | 19 |
CFSM | 0.50 | 0.34 | 0.45 | 0.27 | 0.25 | 0.61 | 1.24 | 3.80 | 0.61 | 1.36 | 0.38 | 0.36 |
IN. | 0.57 | 0.38 | 0.52 | 0.32 | 0.26 | 0.70 | 1.39 | 4.39 | 0.68 | 1.57 | 0.43 | 0.40 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 69.0 | 78.9 | 81.6 | 77.0 | 107 | 167 | 190 | 133 | 106 | 80.6 | 79.7 | 70.5 |
MAX | 472 | 349 | 381 | 239 | 358 | 582 | 496 | 445 | 339 | 290 | 401 | 315 |
(WY) | 2002 | 1986 | 1983 | 1974 | 1997 | 1979 | 1999 | 1996 | 1996 | 1982 | 1987 | 1972 |
MIN | 2.83 | 5.53 | 6.56 | 5.51 | 4.87 | 28.6 | 50.0 | 24.9 | 19.0 | 9.46 | 6.15 | 4.54 |
(WY) | 1953 | 1954 | 1951 | 1963 | 1963 | 1968 | 1986 | 1952 | 1963 | 1956 | 1955 | 1953 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1951 - 2003 | |||
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ANNUAL TOTAL | 39968 | 31237 | ||||
ANNUAL MEAN | 110 | 85.6 | 103 | |||
HIGHEST ANNUAL MEAN | 171 | 1993 | ||||
LOWEST ANNUAL MEAN | 28.0 | 1963 | ||||
HIGHEST DAILY MEAN | 1540 | Aug 22 | 1040 | May 1 | 2030 | Aug 15 1987 |
LOWEST DAILY MEAN | 13 | Aug 12 | 18 | Aug 24 | 0.10 | Sep 30 1953 |
ANNUAL SEVEN-DAY MINIMUM | 16 | Aug 6 | 20 | Aug 19 | 1.3 | Oct 9 1952 |
MAXIMUM PEAK FLOW | 1130 | May 1 | 2590 | Aug 14 1987 | ||
MAXIMUM PEAK STAGE | 7.59 | May 1 | 11.35 | Aug 14 1987 | ||
INSTANTANEOUS LOW FLOW | 15 | Aug 24,25 | ||||
ANNUAL RUNOFF (CFSM) | 1.10 | 0.86 | 1.03 | |||
ANNUAL RUNOFF (INCHES) | 14.87 | 11.62 | 14.04 | |||
10 PERCENT EXCEEDS | 235 | 187 | 248 | |||
50 PERCENT EXCEEDS | 55 | 34 | 48 | |||
90 PERCENT EXCEEDS | 22 | 23 | 13 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |