LOCATION.-- Lat 41°11'13", long 90°58'02" (NAD of 1927), at quarter corner between secs.21 and 28, T.14 N., R.5 W., Mercer County, Hydrologic Unit 07080104, on left bank at downstream side of bridge on State Highway 17, 1.5 mi northeast of New Boston, and at mile 4.6. |
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DRAINAGE AREA.-- 445 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1934 to current year. Monthly discharge only for some periods, published in WSP 1308. |
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STAGE: Water years 1994-2002. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-91. Additional chemical data for water years 1959, 1971-77 are published in Water-Resources Investigations 78-23 and 79-24 as site LF 01. |
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SEDIMENT: January 1979 to September 1981. |
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REVISED RECORDS.-- WSP 1508: 1935-36(M), 1938-40(M), 1941, 1943. WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 529.92 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Mar. 1, 1941, nonrecording gage at same site and datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 18,000 ft3/s, Apr. 22, 1973, gage height, 23.33 ft; minimum, 1.2 ft3/s, Oct. 19, 20, 1988. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 11,600 mg/L May 29, 1980; minimum daily mean, 9 mg/L Feb. 15, 1981. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 75,400 tons Apr. 14, 1981; minimum daily, 1.4 tons Oct. 12, 13, 1979. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. |
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 37 | 131 | 104 | e87 | 75 | e280 | 194 | 638 | 456 | 347 | 142 | 105 |
2 | 37 | 123 | 102 | e84 | 73 | e250 | 208 | 579 | 427 | 325 | 129 | 100 |
3 | 36 | 115 | 103 | e82 | 92 | e200 | 254 | 512 | 410 | 307 | 120 | 94 |
4 | 38 | 104 | 102 | e84 | 84 | e170 | 277 | 454 | 638 | 294 | 115 | 90 |
5 | 75 | 100 | 102 | e86 | 113 | e210 | 243 | 422 | 2080 | 278 | 334 | 86 |
6 | 95 | 97 | 104 | e88 | 87 | 339 | 230 | 404 | 2450 | 337 | 417 | 80 |
7 | 84 | 95 | 102 | e90 | 81 | 321 | 247 | 391 | 3300 | 450 | 222 | 76 |
8 | 62 | 94 | 99 | e93 | 78 | 503 | 633 | 364 | 1980 | 359 | 158 | 73 |
9 | 52 | 90 | 95 | 96 | 87 | 1380 | 1880 | 377 | 1030 | 290 | 137 | 70 |
10 | 52 | 87 | 92 | 99 | 108 | 1110 | 2000 | 379 | 806 | 264 | 124 | 68 |
11 | 56 | 86 | 90 | 103 | 160 | 674 | 1390 | 554 | 959 | 374 | 114 | 66 |
12 | 57 | 86 | 92 | 102 | 192 | 561 | 953 | 2320 | 1100 | 414 | 109 | 64 |
13 | 57 | 82 | 99 | 100 | 181 | 487 | 772 | 2670 | 2390 | 282 | 124 | 62 |
14 | 57 | 85 | 121 | 97 | 184 | 437 | 666 | 3870 | 2710 | 246 | 117 | 62 |
15 | 69 | 86 | 134 | 102 | 193 | 392 | 604 | 3590 | 2910 | 226 | 103 | 61 |
16 | 75 | 85 | 122 | 87 | 212 | 347 | 537 | 1800 | 2200 | 212 | 102 | 59 |
17 | 64 | 80 | 132 | 84 | 237 | 311 | 482 | 1260 | 1150 | 199 | 100 | 58 |
18 | 58 | 78 | 131 | 85 | 230 | 300 | 443 | 1010 | 891 | 191 | 91 | 57 |
19 | 54 | 75 | 123 | 81 | 229 | 285 | 416 | 865 | 751 | 647 | 199 | 57 |
20 | 52 | 73 | 116 | 89 | 327 | 272 | 391 | 742 | 677 | 310 | 189 | 60 |
21 | 52 | 73 | 108 | 79 | 878 | 257 | 383 | 658 | 612 | 228 | 140 | 59 |
22 | 58 | 73 | 114 | 83 | 741 | 229 | 412 | 605 | 563 | 197 | 110 | 57 |
23 | 394 | 74 | e140 | 84 | 548 | 229 | 381 | 586 | 524 | 179 | 961 | 55 |
24 | 612 | 87 | e150 | 91 | 471 | 241 | 364 | 589 | 489 | 165 | 556 | 53 |
25 | 375 | 116 | e120 | 80 | 412 | 225 | 471 | 656 | 463 | 156 | 297 | 53 |
26 | 312 | 133 | e110 | 84 | 357 | 210 | 487 | 1130 | 461 | 151 | 204 | 51 |
27 | 223 | 114 | e106 | 84 | 312 | 206 | 456 | 775 | 478 | 307 | 167 | 50 |
28 | 181 | 106 | e103 | 84 | e270 | 203 | 915 | 648 | 471 | 194 | 144 | 50 |
29 | 156 | 107 | e100 | 82 | --- | 210 | 975 | 581 | 405 | 249 | 130 | 50 |
30 | 144 | 103 | e96 | 80 | --- | 222 | 718 | 545 | 371 | 201 | 120 | 48 |
31 | 136 | --- | e91 | 72 | --- | 204 | --- | 495 | --- | 160 | 111 | --- |
TOTAL | 3810 | 2838 | 3403 | 2722 | 7012 | 11265 | 18382 | 30469 | 34152 | 8539 | 6086 | 1974 |
MEAN | 122.9 | 94.60 | 109.8 | 87.81 | 250.4 | 363.4 | 612.7 | 982.9 | 1138 | 275.5 | 196.3 | 65.80 |
MAX | 612 | 133 | 150 | 103 | 878 | 1380 | 2000 | 3870 | 3300 | 647 | 961 | 105 |
MIN | 36 | 73 | 90 | 72 | 73 | 170 | 194 | 364 | 371 | 151 | 91 | 48 |
CFSM | 0.28 | 0.21 | 0.25 | 0.20 | 0.56 | 0.82 | 1.38 | 2.21 | 2.56 | 0.62 | 0.44 | 0.15 |
IN. | 0.32 | 0.24 | 0.28 | 0.23 | 0.59 | 0.94 | 1.54 | 2.55 | 2.85 | 0.71 | 0.51 | 0.17 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1935 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 141.8 | 169.8 | 175.3 | 242.8 | 373.1 | 498.5 | 553.0 | 488.8 | 450.3 | 303.1 | 162.7 | 125.6 |
MAX | 1216 | 1192 | 1469 | 1133 | 1512 | 1791 | 2307 | 1762 | 1829 | 2258 | 1508 | 1006 |
(WY) | 1999 | 1978 | 1983 | 1969 | 2001 | 1993 | 1973 | 1996 | 1974 | 1982 | 1993 | 1970 |
MIN | 5.47 | 11.2 | 8.86 | 6.39 | 11.9 | 66.0 | 33.4 | 33.0 | 35.8 | 11.7 | 10.3 | 7.29 |
(WY) | 1989 | 1938 | 1964 | 1977 | 1989 | 1956 | 1956 | 1989 | 1977 | 1936 | 1988 | 1988 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1935 - 2002 | |||
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ANNUAL TOTAL | 191288 | 130652 | ||||
ANNUAL MEAN | 524.1 | 358.0 | 306.4 | |||
HIGHEST ANNUAL MEAN | 965 | 1993 | ||||
LOWEST ANNUAL MEAN | 76.6 | 1940 | ||||
HIGHEST DAILY MEAN | 4120 | Feb 11 | 3870 | May 14 | 14000 | Apr 22 1973 |
LOWEST DAILY MEAN | 35 | Sep 16,17 | 36 Oct 3 | 1.3 | Oct 19 1988 | |
ANNUAL SEVEN-DAY MINIMUM | 38 | Sep 28 | 51 | Sep 24 | 2.4 | Oct 18 1988 |
MAXIMUM PEAK FLOW | 4300 | May 15 | 18000 | Apr 22 1973 | ||
MAXIMUM PEAK STAGE | 22.11 | May 15 | 23.33 | Apr 22 1973 | ||
INSTANTANEOUS LOW FLOW | 35 | Oct 3,4 | 1.2 | A | ||
ANNUAL RUNOFF (CFSM) | 1.18 | 0.80 | 0.69 | |||
ANNUAL RUNOFF (INCHES) | 15.99 | 10.92 | 9.35 | |||
10 PERCENT EXCEEDS | 1370 | 746 | 703 | |||
50 PERCENT EXCEEDS | 155 | 165 | 131 | |||
90 PERCENT EXCEEDS | 54 | 65 | 21 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |