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 to current year. |
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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 crest-stage gage. Datum of gage is 529.92 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers) (529.70 ft NAVD 1988). 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 July 26 to Aug. 2, which are fair, and those for estimated daily discharges, which are 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 | 30 | 377 | 559 | e220 | e245 | 341 | 400 | 224 | 131 | 83 | 25 | 14 |
2 | 33 | 805 | 502 | 284 | e260 | 323 | 366 | 215 | 125 | 78 | 22 | 14 |
3 | 33 | 773 | 454 | 424 | e255 | 306 | 354 | 213 | 122 | 76 | 21 | 14 |
4 | 32 | 566 | 427 | 653 | e260 | 304 | 342 | 209 | 124 | 78 | 20 | 14 |
5 | 31 | 527 | 402 | 557 | e280 | 304 | 330 | 201 | 147 | 77 | 19 | 13 |
6 | 29 | 468 | 490 | 384 | 316 | 296 | 320 | 197 | 142 | 75 | 18 | 13 |
7 | 30 | 407 | 729 | 335 | 433 | 295 | 306 | 197 | 124 | 71 | 17 | 13 |
8 | 63 | 354 | 1050 | e330 | 560 | 294 | 292 | 198 | 126 | 67 | 16 | 15 |
9 | 141 | 314 | 871 | e300 | 443 | 270 | 278 | 222 | 440 | 63 | 16 | 15 |
10 | 91 | 292 | 697 | 272 | 346 | 261 | 272 | 211 | 400 | 60 | 16 | 14 |
11 | 65 | 274 | 597 | 263 | 310 | 267 | 267 | 195 | 267 | 57 | 22 | 14 |
12 | 54 | 251 | 533 | 284 | 301 | 265 | 396 | 188 | 225 | 55 | 27 | 13 |
13 | 49 | 231 | 480 | 851 | 450 | 244 | 508 | 219 | 200 | 55 | 24 | 13 |
14 | 48 | 219 | 412 | 1440 | 861 | 238 | 423 | 261 | 182 | 53 | 24 | 13 |
15 | 51 | 211 | 383 | 860 | 969 | 228 | 360 | 226 | 168 | 52 | 23 | 14 |
16 | 49 | 208 | 394 | e780 | 679 | 224 | 335 | 204 | 158 | 49 | 19 | 27 |
17 | 47 | 206 | 364 | e620 | 558 | 225 | 320 | 195 | 147 | 45 | 17 | 21 |
18 | 46 | 201 | 348 | e560 | 482 | 225 | 309 | 188 | 139 | 43 | 17 | 18 |
19 | 51 | 241 | 323 | e500 | 429 | 222 | 298 | 197 | 130 | 41 | 17 | 18 |
20 | 53 | 298 | 231 | e450 | 415 | 217 | 287 | 200 | 124 | 43 | 20 | 15 |
21 | 52 | 261 | e225 | e410 | 433 | 210 | 278 | 189 | 118 | 45 | 19 | 14 |
22 | 61 | 232 | e210 | e370 | 400 | 204 | 285 | 180 | 113 | 39 | 22 | 14 |
23 | 436 | 224 | e200 | e350 | 365 | 213 | 298 | 171 | 109 | 36 | 20 | 14 |
24 | 414 | 222 | e190 | e330 | 352 | 238 | 296 | 163 | 104 | 34 | 17 | 15 |
25 | 253 | 213 | e180 | e300 | 349 | 472 | 283 | 155 | 100 | 33 | 15 | 15 |
26 | 527 | 209 | e175 | e290 | 340 | 925 | 278 | 149 | 95 | 39 | 15 | 15 |
27 | 710 | 252 | e172 | e310 | 332 | 710 | 269 | 145 | 92 | 51 | 15 | 15 |
28 | 472 | 816 | e175 | e300 | 339 | 591 | 251 | 141 | 89 | 58 | 18 | 16 |
29 | 361 | 788 | e180 | e290 | --- | 527 | 240 | 141 | 86 | 46 | 15 | 16 |
30 | 421 | 590 | e190 | e280 | --- | 478 | 234 | 141 | 87 | 31 | 14 | 15 |
31 | 399 | --- | e200 | e260 | --- | 452 | --- | 139 | --- | 27 | 14 | --- |
TOTAL | 5132 | 11030 | 12343 | 13857 | 11762 | 10369 | 9475 | 5874 | 4614 | 1660 | 584 | 454 |
MEAN | 166 | 368 | 398 | 447 | 420 | 334 | 316 | 189 | 154 | 53.5 | 18.8 | 15.1 |
MAX | 710 | 816 | 1050 | 1440 | 969 | 925 | 508 | 261 | 440 | 83 | 27 | 27 |
MIN | 29 | 201 | 172 | 220 | 245 | 204 | 234 | 139 | 86 | 27 | 14 | 13 |
CFSM | 0.37 | 0.83 | 0.89 | 1.00 | 0.94 | 0.75 | 0.71 | 0.43 | 0.35 | 0.12 | 0.04 | 0.03 |
IN. | 0.43 | 0.92 | 1.03 | 1.16 | 0.98 | 0.87 | 0.79 | 0.49 | 0.39 | 0.14 | 0.05 | 0.04 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1935 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 139 | 169 | 178 | 241 | 366 | 489 | 539 | 503 | 448 | 295 | 158 | 122 |
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 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1935 - 2005 | |||
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ANNUAL TOTAL | 118425 | 87154 | ||||
ANNUAL MEAN | 324 | 239 | 303 | |||
HIGHEST ANNUAL MEAN | 965 | 1993 | ||||
LOWEST ANNUAL MEAN | 76.6 | 1940 | ||||
HIGHEST DAILY MEAN | 4920 | May 31 | 1440 | Jan 14 | 14000 | Apr 22 1973 |
LOWEST DAILY MEAN | 29 | A | 13 | B | 1.3 | Oct 19 1988 |
ANNUAL SEVEN-DAY MINIMUM | 31 | Sep 25 | 14 | Sep 1 | 2.4 | Oct 18 1988 |
MAXIMUM PEAK FLOW | 1630 | Jan 14 | 18000 | Apr 22 1973 | ||
MAXIMUM PEAK STAGE | 19.16 | Jan 14 | 23.33 | Apr 22 1973 | ||
INSTANTANEOUS LOW FLOW | 12 | Sep 14,15 | 1.2 | C | ||
ANNUAL RUNOFF (CFSM) | 0.727 | 0.537 | 0.682 | |||
ANNUAL RUNOFF (INCHES) | 9.90 | 7.29 | 9.26 | |||
10 PERCENT EXCEEDS | 698 | 494 | 700 | |||
50 PERCENT EXCEEDS | 213 | 213 | 130 | |||
90 PERCENT EXCEEDS | 49 | 17 | 21 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |