LOCATION.-- Lat 39°48'23", long 88°28'34" (NAD of 1927), in NE1/4NW1/4 sec.36, T.16 N., R.6 E., Piatt County, Hydrologic Unit 07140201, on left bank at downstream side of bridge, 0.9 mi northwest of Atwood and at mile 9.0. |
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DRAINAGE AREA.-- 149 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1972 to current year. |
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STAGE: Water years 1994 to current year. |
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REVISED RECORDS.-- WDR IL-93-1: 1989(M), 1990-92. WDR IL-94-1: 1989. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 644.58 ft above NGVD of 1929 (644.35 ft NAVD 1988). |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 4,030 ft3/s, Mar. 5, 1979, gage height, 14.03 ft; maximum gage height, 15.39 ft, Apr. 12, 1994, discharge, 3,390 ft3/s; no flow for many days in most years. |
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REMARKS FOR CURRENT YEAR.-- Records poor. |
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 | e1.4 | 103 | 1100 | 43 | 77 | 129 | 126 | 50 | 36 | 19 | e4.3 | 0.69 |
2 | e1.4 | 500 | 950 | 41 | 71 | 108 | 119 | 47 | 38 | e16 | e3.7 | 0.62 |
3 | e1.5 | 489 | 699 | 121 | 69 | 98 | 107 | 46 | 38 | e14 | e3.2 | 0.59 |
4 | e1.4 | 374 | 526 | 701 | 66 | 98 | 97 | 45 | 37 | e13 | e2.8 | 0.63 |
5 | e1.4 | 310 | 400 | 1310 | 84 | 92 | 93 | 44 | 35 | e15 | e2.9 | 0.72 |
6 | e1.3 | 249 | 349 | 2140 | 206 | 81 | 87 | 44 | 34 | 13 | e4.5 | 0.72 |
7 | e1.3 | 197 | 976 | 1530 | 405 | 89 | 82 | 45 | 32 | e12 | e3.5 | 0.75 |
8 | e1.7 | 145 | 1320 | 904 | 773 | 80 | 74 | 46 | 31 | e9.9 | e2.9 | 0.83 |
9 | 1.8 | 115 | 924 | 649 | 706 | 66 | 69 | 47 | 31 | e8.9 | e2.5 | 0.92 |
10 | 2.0 | 104 | 674 | 609 | 517 | 65 | 68 | 48 | 30 | e7.5 | e2.3 | 0.96 |
11 | e2.0 | 97 | 499 | 716 | 374 | 71 | 66 | 53 | 32 | e6.7 | e2.2 | 0.87 |
12 | e2.1 | 88 | 384 | 1610 | 325 | 67 | 86 | 81 | 31 | e7.9 | e2.4 | 0.75 |
13 | e2.2 | 74 | 297 | 2530 | 417 | 59 | 161 | 67 | 31 | e13 | e2.6 | 0.73 |
14 | e2.3 | 64 | 226 | 2800 | 1140 | 49 | 139 | 63 | 150 | e15 | e2.8 | 0.85 |
15 | e2.9 | 60 | 191 | 1790 | 897 | 46 | 112 | 54 | 351 | e14 | e3.5 | 1.3 |
16 | e2.7 | 58 | 174 | 964 | 724 | 46 | 96 | 46 | 204 | e11 | e3.1 | 1.8 |
17 | e2.7 | 57 | 150 | 557 | 560 | 50 | 87 | 43 | 125 | e9.5 | e4.4 | 1.5 |
18 | 4.9 | 54 | 138 | e400 | 391 | 51 | 83 | 42 | 92 | e8.9 | e4.2 | 1.6 |
19 | 38 | 70 | 119 | 304 | 294 | 50 | 79 | 49 | 71 | e11 | 6.2 | 4.2 |
20 | 45 | 118 | 107 | 236 | 256 | 45 | 75 | 76 | 59 | e12 | 7.7 | 6.2 |
21 | 24 | 108 | 113 | 201 | 260 | 40 | 75 | 71 | 51 | e11 | 8.3 | 4.5 |
22 | 16 | 92 | 86 | 182 | 235 | 42 | 109 | 60 | 45 | 16 | 7.1 | 4.3 |
23 | 15 | 87 | e81 | 152 | 207 | 81 | 121 | 56 | 40 | 17 | 4.5 | 4.2 |
24 | 42 | 192 | e77 | 143 | 193 | 196 | 98 | 51 | 37 | e16 | 3.4 | 10 |
25 | 39 | 834 | e70 | e140 | 178 | 278 | 88 | 46 | 33 | e11 | 2.4 | 14 |
26 | 27 | 769 | e68 | e140 | 161 | 381 | 83 | 44 | 30 | e8.5 | 1.9 | 67 |
27 | 84 | 713 | 63 | e138 | 144 | 279 | 72 | 43 | 27 | e6.7 | 1.5 | 56 |
28 | 125 | 978 | 60 | 133 | 145 | 221 | 60 | 42 | 25 | e9.3 | 1.1 | 31 |
29 | 92 | 780 | e52 | 122 | --- | 175 | 56 | 41 | 23 | e8.7 | 0.91 | 30 |
30 | 87 | 801 | e50 | 108 | --- | 155 | 55 | 39 | 21 | e6.1 | 0.82 | 29 |
31 | 100 | --- | e46 | 88 | --- | 155 | --- | 38 | --- | e4.7 | 0.77 | --- |
TOTAL | 771.0 | 8680 | 10969 | 21502 | 9875 | 3443 | 2723 | 1567 | 1820 | 352.3 | 104.40 | 277.23 |
MEAN | 24.9 | 289 | 354 | 694 | 353 | 111 | 90.8 | 50.5 | 60.7 | 11.4 | 3.37 | 9.24 |
MAX | 125 | 978 | 1320 | 2800 | 1140 | 381 | 161 | 81 | 351 | 19 | 8.3 | 67 |
MIN | 1.3 | 54 | 46 | 41 | 66 | 40 | 55 | 38 | 21 | 4.7 | 0.77 | 0.59 |
CFSM | 0.17 | 1.94 | 2.37 | 4.66 | 2.37 | 0.75 | 0.61 | 0.34 | 0.41 | 0.08 | 0.02 | 0.06 |
IN. | 0.19 | 2.17 | 2.74 | 5.37 | 2.47 | 0.86 | 0.68 | 0.39 | 0.45 | 0.09 | 0.03 | 0.07 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1973 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 48.9 | 107 | 151 | 144 | 203 | 249 | 231 | 264 | 173 | 85.3 | 52.5 | 22.6 |
MAX | 371 | 592 | 452 | 694 | 595 | 957 | 703 | 843 | 738 | 358 | 394 | 272 |
(WY) | 1994 | 1993 | 1988 | 2005 | 1982 | 1979 | 1994 | 2002 | 1974 | 1973 | 1981 | 1993 |
MIN | 0.00 | 0.66 | 0.46 | 0.16 | 1.53 | 18.0 | 14.9 | 32.4 | 2.65 | 0.00 | 0.00 | 0.00 |
(WY) | 1989 | 2003 | 1977 | 1977 | 2003 | 2003 | 2003 | 2001 | 1988 | 1988 | 1984 | 1988 |
SUMMARY STATISTICS | FOR 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1973 - 2005 | |||
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ANNUAL TOTAL | 62468.00 | 62083.93 | ||||
ANNUAL MEAN | 171 | 170 | 144 | |||
HIGHEST ANNUAL MEAN | 260 | 1973 | ||||
LOWEST ANNUAL MEAN | 35.1 | 2003 | ||||
HIGHEST DAILY MEAN | 2020 | Mar 27 | 2800 | Jan 14 | 3810 | May 13 2002 |
LOWEST DAILY MEAN | 1.2 A | Sep 28 | 0.59 | Sep 3 | 0.00 | B |
ANNUAL SEVEN-DAY MINIMUM | 1.3 A | Sep 25 | 0.67 | Sep 1 | 0.00 | B |
MAXIMUM PEAK FLOW | 3140 | Jan 14 | 4030 C | Mar 5 1979 | ||
MAXIMUM PEAK STAGE | 14.40 | Jan 14 | 15.39 D | Apr 12 1994 | ||
INSTANTANEOUS LOW FLOW | 0.47 | Sep 3 | ||||
ANNUAL RUNOFF (CFSM) | 1.15 | 1.14 | 0.966 | |||
ANNUAL RUNOFF (INCHES) | 15.60 | 15.50 | 13.12 | |||
10 PERCENT EXCEEDS | 494 | 499 | 388 | |||
50 PERCENT EXCEEDS | 61 | 57 | 50 | |||
90 PERCENT EXCEEDS | 3.2 | 2.2 | 0.80 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |