LOCATION.-- Lat 41°49'20", long 87°49'15" (NAD of 1927), in SW1/4SW1/4 sec.36, T.39 N., R.12 E., Cook County, Hydrologic Unit 07120004, on left bank 400 ft downstream from bridge on Barry Point Road in Riverside, 500 ft downstream from Hoffman Dam, 4,000 ft downstream from Salt Creek, and at mile 44.3. |
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DRAINAGE AREA.-- 630 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1943 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 1987-92 and 1999 to current. |
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SEDIMENT: April 1979 to September 1982. |
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MISCELLANEOUS: Contaminants in streambed sediments, August 1998; contaminants in fish tissue, August 1998. |
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BIOLOGICAL |
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BENTHIC MACROINVERTEBRATES: Water year 1999. |
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FISH: Water years 1999, 2000, and 2002. |
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HABITAT: Water years 1999, and 2002. |
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REVISED RECORDS.-- WSP 1174: 1944, 1948. WSP 1308: 1944(M). 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 concrete dam. Datum of gage is 594.68 ft above NGVD of 1929. Prior to Nov. 27, 1946, nonrecording gage at bridge 400 ft upstream at same datum. |
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REMARKS.-- Occasional regulation by gates at Hoffman Dam. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 9,770 ft3/s, Aug. 15, 1987, gage height, 9.90 ft; no flow Aug. 22-24, 1962, and part of Sept. 5, 1968, Aug. 31, Oct. 7, 1974. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 297 mg/L Apr. 12, 1979; minimum daily mean, 3 mg/L Jan. 24, Feb. 1, 3, 4, 1982 |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,240 tons Apr. 12, 1979; minimum daily, 1.5 tons Feb. 3, 4, 1982. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood of Mar. 18, 1919, reached a discharge of 7,450 ft3/s, gage height, 9.43 ft., present datum, from information furnished by Metropolitan Sanitary District of Greater Chicago. |
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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 | 531 | 1410 | 866 | e265 | 494 | 632 | 584 | 679 | 370 | 246 | 175 | 328 |
2 | 491 | 1280 | 757 | e260 | 504 | 630 | 743 | 1130 | 334 | 246 | 210 | 673 |
3 | 434 | 1170 | 651 | e255 | 454 | 761 | 641 | 1360 | 329 | 222 | 169 | 1080 |
4 | 473 | 1050 | 608 | e255 | 424 | 691 | 578 | 1000 | e1650 | 222 | 168 | 784 |
5 | 1420 | 935 | 560 | e260 | 370 | 582 | 556 | 749 | e3300 | 199 | 451 | 577 |
6 | 870 | 837 | 551 | e255 | 342 | 613 | 493 | 642 | 3590 | 183 | 292 | 486 |
7 | 606 | 729 | 508 | e250 | 364 | 810 | 560 | 580 | 2940 | 194 | 208 | 404 |
8 | 477 | 620 | 473 | e250 | 405 | 1260 | 1030 | 565 | 2140 | 195 | 196 | 342 |
9 | 397 | 542 | 442 | e260 | 475 | 2130 | 2160 | 734 | 1560 | 1400 | 176 | 313 |
10 | 348 | 507 | 416 | 266 | 705 | 2450 | 2200 | 636 | 1420 | 775 | 166 | 296 |
11 | 443 | 483 | 404 | 274 | 804 | 1900 | 1890 | 951 | 1640 | 443 | 157 | 274 |
12 | 871 | 462 | 394 | 269 | 793 | 1480 | 1560 | 3310 | 1500 | 318 | 163 | 243 |
13 | 1740 | 447 | 728 | 261 | 727 | 1300 | 1370 | 3530 | 1260 | 266 | 372 | 241 |
14 | 5410 | 467 | 725 | 263 | 676 | 1180 | 1270 | 2770 | 1220 | 241 | 1790 | 233 |
15 | 5860 | 452 | 637 | 274 | 606 | 1080 | 1220 | 1670 | 1250 | 236 | 1260 | 205 |
16 | 5170 | 471 | 586 | 274 | 565 | 1000 | 1180 | 1480 | 995 | 237 | 681 | 184 |
17 | 3950 | 479 | 687 | 296 | 513 | 913 | 1210 | 2130 | 816 | 199 | 424 | 186 |
18 | 2730 | 497 | 620 | 292 | 471 | 856 | 1110 | 1800 | 698 | 187 | 297 | 276 |
19 | 1920 | 570 | 607 | 275 | 584 | 798 | 1010 | 1320 | 544 | 181 | 336 | 264 |
20 | 1490 | 558 | 646 | 275 | 1020 | 749 | 1150 | 1090 | 470 | 176 | 341 | 561 |
21 | 1250 | 496 | 570 | 271 | 1300 | 647 | 1070 | 873 | 412 | 175 | 317 | 668 |
22 | 1110 | 426 | 516 | 268 | 1200 | 571 | 1170 | 725 | 384 | 174 | 3090 | 563 |
23 | 2060 | 396 | 556 | 269 | 1030 | 512 | 1010 | 630 | 353 | 184 | 4800 | 554 |
24 | 3090 | 416 | 525 | 276 | 925 | 463 | 919 | 575 | 330 | 182 | 4150 | 404 |
25 | 4380 | 674 | 472 | 279 | 855 | 441 | 1020 | 586 | 356 | 177 | 2750 | 320 |
26 | 3970 | 565 | 408 | 273 | 812 | 425 | 801 | 552 | 344 | 175 | 1450 | 262 |
27 | 3120 | 559 | e380 | 260 | 781 | 392 | 811 | 505 | 302 | 223 | 967 | 240 |
28 | 2380 | 510 | e360 | 267 | 701 | 381 | 1220 | 454 | 286 | 256 | 745 | 222 |
29 | 1960 | 550 | e310 | 284 | --- | 584 | 979 | 437 | 264 | 250 | 546 | 295 |
30 | 1770 | 804 | e280 | 295 | --- | 891 | 809 | 418 | 251 | 254 | 448 | 358 |
31 | 1600 | --- | e270 | 348 | --- | 697 | --- | 408 | --- | 203 | 402 | --- |
TOTAL | 62321 | 19362 | 16513 | 8419 | 18900 | 27819 | 32324 | 34289 | 31308 | 8619 | 27697 | 11836 |
MEAN | 2010 | 645.4 | 532.7 | 271.6 | 675.0 | 897.4 | 1077 | 1106 | 1044 | 278.0 | 893.5 | 394.5 |
MAX | 5860 | 1410 | 866 | 348 | 1300 | 2450 | 2200 | 3530 | 3590 | 1400 | 4800 | 1080 |
MIN | 348 | 396 | 270 | 250 | 342 | 381 | 493 | 408 | 251 | 174 | 157 | 184 |
CFSM | 3.19 | 1.02 | 0.85 | 0.43 | 1.07 | 1.42 | 1.71 | 1.76 | 1.66 | 0.44 | 1.42 | 0.63 |
IN. | 3.68 | 1.14 | 0.98 | 0.50 | 1.12 | 1.64 | 1.91 | 2.02 | 1.85 | 0.51 | 1.64 | 0.70 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1944 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 339.8 | 410.4 | 433.9 | 442.8 | 560.4 | 1002 | 1104 | 759.0 | 586.6 | 384.0 | 366.3 | 333.5 |
MAX | 2224 | 2056 | 2211 | 1711 | 1830 | 3499 | 3050 | 2362 | 1922 | 1355 | 2306 | 2035 |
(WY) | 1987 | 1986 | 1983 | 1960 | 1997 | 1979 | 1993 | 1996 | 1996 | 1993 | 1987 | 1972 |
MIN | 4.27 | 11.8 | 15.2 | 11.2 | 28.9 | 77.8 | 184 | 79.4 | 69.7 | 26.5 | 8.46 | 11.9 |
(WY) | 1954 | 1954 | 1945 | 1945 | 1963 | 1945 | 1945 | 1946 | 1963 | 1944 | 1944 | 1946 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1944 - 2002 | |||
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ANNUAL TOTAL | 339557 | 299407 | ||||
ANNUAL MEAN | 930.3 | 820.3 | 559.7 | |||
HIGHEST ANNUAL MEAN | 1092 | 1993 | ||||
LOWEST ANNUAL MEAN | 111 | 1963 | ||||
HIGHEST DAILY MEAN | 5860 | Oct 15 | 5860 | Oct 15 | 9180 | Aug 15 1987 |
LOWEST DAILY MEAN | 182 | Jul 16 | 157 | Aug 11 | 0.00 | Aug 23 1962 |
ANNUAL SEVEN-DAY MINIMUM | 200 | Jul 11 | 178 | Jul 20 | 1.5 | Oct 19 1953 |
MAXIMUM PEAK FLOW | 6050 | Oct 14 | 9770 | Aug 15 1987 | ||
MAXIMUM PEAK STAGE | 7.89 | Oct 14 | 9.90 | Aug 15 1987 | ||
INSTANTANEOUS LOW FLOW | 153 | Aug 11 | A | |||
ANNUAL RUNOFF (CFSM) | 1.48 | 1.30 | 0.89 | |||
ANNUAL RUNOFF (INCHES) | 20.05 | 17.68 | 12.07 | |||
10 PERCENT EXCEEDS | 1740 | 1660 | 1380 | |||
50 PERCENT EXCEEDS | 725 | 554 | 306 | |||
90 PERCENT EXCEEDS | 294 | 241 | 37 |
A - No flow Aug. 22-24, 1962, and part of Sept. 5, 1968, Aug. 31, Oct. 7, 1974. |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |