LOCATION.-- Lat 40°28'19", long 89°01'41" (NAD of 1983), in NE1/4NW1/4 sec.7, T.23 N., R.2 E., McLean County, Hydrologic Unit 07130009, on left bank at Bloomington-Normal Sanitary District sewage-treatment plant, 250 ft upstream from bridge on Interstate 74, 0.4 mi west of Bloomington, and at mile 48.8. |
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DRAINAGE AREA.-- 34.4 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1974 to current year. |
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STAGE: Water years 1994 to current year. |
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REVISED RECORDS.-- WDR IL-82-2: Drainage area. WDR IL-87-2: 1985. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 725.11 ft above NGVD of 1929 (724.91 ft NAVD 1988). Prior to Nov. 4, 1987, 200 ft upstream at same datum. |
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REMARKS.-- Sewage-treatment plant effluent 300 ft upstream contains publicly supplied water from Lake Bloomington and Lake Evergreen and ground-water sources. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,600 ft3/s, Dec. 3, 1982, gage height, 14.02 ft, from floodmark; minimum daily, 9.0 ft3/s, Dec. 25, 1976. |
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REMARKS FOR CURRENT YEAR.-- Records fair. Effluent from sewage-treatment plant upstream averaged 30.3 ft3/s and contains publicly supplied water from Lake Bloomington and Lake Evergreen and ground-water sources. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 25 | 554 | 186 | 61 | 55 | 60 | 66 | 38 | 32 | 19 | 18 | 20 |
2 | 35 | 237 | 125 | 85 | 54 | 56 | 54 | 38 | 36 | 18 | 18 | 19 |
3 | 21 | 155 | 93 | 314 | 54 | 54 | 44 | 37 | 39 | 17 | 19 | 18 |
4 | 21 | 233 | 77 | 205 | 55 | 54 | 41 | 36 | 39 | 74 | 27 | 17 |
5 | 22 | 109 | 72 | 372 | 58 | 51 | 42 | 35 | 51 | 32 | 26 | 17 |
6 | 21 | 76 | 119 | 189 | 61 | 50 | 45 | 36 | 37 | 19 | 19 | 19 |
7 | 21 | 62 | 428 | 116 | 122 | 50 | 44 | 38 | 34 | 19 | 17 | 20 |
8 | 64 | 49 | 174 | 91 | 121 | 46 | 41 | 40 | 37 | 18 | 17 | 19 |
9 | 28 | 44 | 118 | 86 | 94 | 45 | 40 | 75 | 38 | 17 | 18 | 19 |
10 | 22 | 41 | 92 | 101 | 82 | 51 | 40 | 47 | 51 | 16 | 18 | 19 |
11 | 23 | 39 | 80 | 158 | 77 | 50 | 41 | 44 | 45 | 17 | 50 | 21 |
12 | 56 | 35 | 67 | 581 | 72 | 44 | 119 | 49 | 27 | 263 | 41 | 23 |
13 | 88 | 32 | 57 | 1530 | 211 | 40 | 89 | 45 | 27 | 65 | 82 | 19 |
14 | 56 | 31 | 49 | 283 | 237 | 38 | 53 | 42 | 48 | 29 | 91 | 36 |
15 | 48 | 31 | 47 | 167 | 142 | 36 | 44 | 39 | 23 | 23 | 36 | 58 |
16 | 26 | 31 | 46 | 131 | 118 | 35 | 40 | 40 | 23 | 21 | 25 | 32 |
17 | 22 | 32 | 42 | 109 | 98 | 35 | 38 | 37 | 23 | 20 | 23 | 21 |
18 | 178 | 56 | 41 | 98 | 84 | 34 | 39 | 33 | 21 | 60 | 24 | 19 |
19 | 56 | 61 | 36 | 92 | 77 | 35 | 38 | 97 | 21 | 23 | 162 | 174 |
20 | 33 | 39 | 37 | 85 | 99 | 34 | 90 | 49 | 23 | 25 | 113 | 58 |
21 | 28 | 32 | 35 | 79 | 85 | 34 | 89 | 35 | 23 | 23 | 34 | 26 |
22 | 26 | 31 | 31 | 73 | 76 | 51 | 166 | 31 | 22 | 24 | 25 | 23 |
23 | 65 | 30 | 30 | 69 | 71 | 65 | 82 | 29 | 22 | 19 | 22 | 21 |
24 | 30 | 106 | 29 | 69 | 69 | 49 | 60 | 27 | 22 | 20 | 21 | 245 |
25 | 24 | 122 | 27 | 73 | 67 | 77 | 53 | 27 | 22 | 19 | 23 | 97 |
26 | 134 | 173 | 28 | 72 | 63 | 49 | 56 | 26 | 20 | 91 | 25 | 38 |
27 | 111 | 426 | 28 | 64 | 60 | 43 | 46 | 27 | 19 | 57 | 22 | 26 |
28 | 84 | 204 | 29 | 60 | 70 | 44 | 41 | 26 | 20 | 23 | 21 | 186 |
29 | 180 | 171 | 29 | 61 | --- | 42 | 41 | 26 | 19 | 18 | 21 | 86 |
30 | 207 | 195 | 29 | 63 | --- | 74 | 40 | 27 | 20 | 18 | 20 | 36 |
31 | 69 | --- | 35 | 58 | --- | 62 | --- | 31 | --- | 17 | 20 | --- |
TOTAL | 1824 | 3437 | 2316 | 5595 | 2532 | 1488 | 1722 | 1207 | 884 | 1124 | 1098 | 1432 |
MEAN | 58.8 | 115 | 74.7 | 180 | 90.4 | 48.0 | 57.4 | 38.9 | 29.5 | 36.3 | 35.4 | 47.7 |
MAX | 207 | 554 | 428 | 1530 | 237 | 77 | 166 | 97 | 51 | 263 | 162 | 245 |
MIN | 21 | 30 | 27 | 58 | 54 | 34 | 38 | 26 | 19 | 16 | 17 | 17 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1975 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 36.2 | 47.2 | 50.8 | 44.3 | 58.2 | 77.7 | 69.5 | 75.2 | 54.9 | 45.3 | 44.1 | 40.6 |
MAX | 152 | 203 | 201 | 180 | 148 | 238 | 146 | 181 | 118 | 135 | 138 | 178 |
(WY) | 1987 | 1986 | 1983 | 2005 | 1976 | 1979 | 1979 | 1984 | 1993 | 2003 | 1981 | 1993 |
MIN | 17.1 | 17.5 | 14.0 | 15.5 | 22.5 | 29.6 | 28.1 | 28.0 | 21.1 | 17.2 | 16.5 | 17.0 |
(WY) | 1975 | 1977 | 1977 | 1977 | 1980 | 1981 | 1977 | 1987 | 1988 | 1994 | 1988 | 1998 |
SUMMARY STATISTICS | FOR 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1975 - 2005 | |||
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ANNUAL TOTAL | 22082 | 24659 | ||||
ANNUAL MEAN | 60.3 | 67.6 | 53.7 | |||
HIGHEST ANNUAL MEAN | 99.6 | 1993 | ||||
LOWEST ANNUAL MEAN | 31.7 | 2000 | ||||
HIGHEST DAILY MEAN | 747 | May 30 | 1530 | Jan 13 | 2500 | Mar 4 1979 |
LOWEST DAILY MEAN | 16 | A | 16 | Jul 10 | 9.0 | Dec 25 1976 |
ANNUAL SEVEN-DAY MINIMUM | 17 | Sep 8 | 18 | Sep 2 | 11 | Jul 31 2001 |
MAXIMUM PEAK FLOW | 3130 | Jan 12 | 6600 | Dec 3 1982 | ||
MAXIMUM PEAK STAGE | 9.80 | Jan 12 | 14.02 B | Dec 3 1982 | ||
INSTANTANEOUS LOW FLOW | 4.6 | Aug 4 | ||||
10 PERCENT EXCEEDS | 132 | 123 | 97 | |||
50 PERCENT EXCEEDS | 34 | 41 | 31 | |||
90 PERCENT EXCEEDS | 22 | 20 | 18 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |