LOCATION.-- Lat 42°09'59", long 88°17'25" (NAD of 1927), in NE1/4NW1/4 sec.34, T.43 N., R.8 E., McHenry County, Hydrologic Unit 07120006, on right bank 20 ft upstream from bridge on State Highway 62 (Algonquin Road) in Algonquin, 140 ft upstream from Algonquin Dam, and at mile 81.6. |
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DRAINAGE AREA.-- 1,403 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1915 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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BIOLOGICAL |
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ALGAE: Water years 1989-90. |
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REVISED RECORDS.-- WSP 1175: 1916. WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter, and concrete dam with adjustable gate. Datum of gage is 729.48 ft above NGVD of 1929 (729.29 ft NAVD 1988). Prior to Oct. 20, 1933, nonrecording gage at site 20 ft downstream at same datum. |
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REMARKS.-- Flow regulated by gate in Algonquin Dam, Stratton Lock and Dam (previously known as McHenry Dam), 16 mi upstream from station, and occasionally affected by wind action. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,720 ft3/s, May 22, 2004, gage height 3.09 ft, due to regulation; maximum gage height, 4.50 ft, April 1, 1916; from graph based on gage readings; no flow, Nov. 26, 1952, Nov. 20, 1953, Oct. 25, 1956 and Sept. 9, 14, 1958, result of windstorm. |
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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 | 187 | 535 | 891 | 428 | 693 | 1640 | e1400 | 592 | 481 | 148 | 171 | 130 |
2 | 222 | 605 | 888 | 455 | 668 | 1560 | e1600 | 596 | 455 | 176 | 159 | 128 |
3 | 185 | 596 | 878 | 466 | 622 | 1470 | e1550 | 598 | 435 | 167 | 137 | 134 |
4 | 229 | 760 | 834 | 514 | 606 | 1320 | e1500 | 526 | 416 | 211 | 135 | 125 |
5 | 199 | 744 | 892 | e540 | 618 | 1130 | e1500 | 414 | 404 | 229 | 154 | 114 |
6 | 188 | 826 | 887 | e600 | 639 | 1060 | e1500 | 376 | 405 | 221 | 139 | 113 |
7 | 201 | 868 | 991 | e650 | 846 | 1180 | e1500 | 428 | 426 | 205 | 124 | 116 |
8 | 211 | 797 | 1170 | e720 | 1330 | 1290 | e1450 | 414 | 418 | 183 | 119 | 133 |
9 | 246 | 749 | 1320 | e780 | 1450 | 1550 | e1450 | 422 | 427 | 170 | 104 | 127 |
10 | 260 | 718 | 1340 | e810 | 1440 | 1580 | e1400 | 455 | 407 | 163 | 114 | 113 |
11 | 261 | 876 | 1310 | e820 | 1430 | e1600 | e1400 | 656 | 364 | 170 | 106 | 105 |
12 | 253 | 837 | 1180 | 910 | 1450 | e1600 | e1400 | 747 | 361 | 176 | 165 | 103 |
13 | 246 | 818 | 1250 | 1410 | 1470 | e1600 | e900 | 710 | 394 | 158 | 182 | 105 |
14 | 250 | 813 | 1090 | 1390 | 1610 | e1500 | 828 | 734 | 326 | 146 | 173 | 146 |
15 | 232 | 792 | 1030 | 1260 | 1890 | e1500 | 767 | 770 | 368 | 134 | 166 | 128 |
16 | 192 | 711 | 877 | 1190 | 2010 | e1400 | 655 | 801 | 390 | 123 | 152 | 142 |
17 | 225 | 696 | 800 | 1120 | e2250 | e1250 | 655 | 890 | 382 | 100 | 142 | 126 |
18 | 279 | 627 | 735 | 987 | e2350 | e1100 | 644 | 842 | 364 | 89 | 166 | 118 |
19 | 284 | 622 | 640 | 971 | e2500 | 894 | 630 | 866 | 339 | 117 | 190 | 128 |
20 | 272 | 642 | 665 | 965 | e2500 | 947 | 709 | 1100 | 313 | 130 | 205 | 137 |
21 | 267 | 664 | 649 | 958 | e2500 | 969 | 713 | 1090 | 278 | 171 | 214 | 122 |
22 | 250 | 649 | 574 | 910 | e2400 | 1000 | 728 | 967 | 236 | 183 | 231 | 159 |
23 | 285 | 652 | 547 | 893 | e2200 | 1030 | 747 | 877 | 181 | 160 | 221 | 188 |
24 | 340 | 706 | 537 | 909 | 2030 | 1140 | 722 | 865 | 162 | 135 | 203 | 161 |
25 | 367 | 700 | 527 | 927 | 1780 | 1220 | 634 | 786 | 189 | 180 | 190 | 150 |
26 | 393 | 734 | 523 | 826 | 1710 | 1200 | 598 | 635 | 189 | 195 | 174 | 291 |
27 | 413 | 733 | 508 | 773 | 1650 | 1210 | 597 | 565 | 168 | 242 | 164 | 597 |
28 | 445 | 786 | 428 | 756 | 1680 | 1220 | 633 | 551 | 144 | 203 | 146 | 646 |
29 | 423 | 785 | 407 | 754 | --- | 1180 | 635 | 546 | 162 | 210 | 144 | 593 |
30 | 326 | 895 | 403 | 754 | --- | 1180 | 610 | 559 | 127 | 201 | 150 | 530 |
31 | 440 | --- | 421 | 746 | --- | 1190 | --- | 551 | --- | 168 | 136 | --- |
TOTAL | 8571 | 21936 | 25192 | 26192 | 44322 | 39710 | 30055 | 20929 | 9711 | 5264 | 4976 | 5908 |
MEAN | 276 | 731 | 813 | 845 | 1583 | 1281 | 1002 | 675 | 324 | 170 | 161 | 197 |
MAX | 445 | 895 | 1340 | 1410 | 2500 | 1640 | 1600 | 1100 | 481 | 242 | 231 | 646 |
MIN | 185 | 535 | 403 | 428 | 606 | 894 | 597 | 376 | 127 | 89 | 104 | 103 |
CFSM | 0.20 | 0.52 | 0.58 | 0.60 | 1.13 | 0.91 | 0.71 | 0.48 | 0.23 | 0.12 | 0.11 | 0.14 |
IN. | 0.23 | 0.58 | 0.67 | 0.69 | 1.18 | 1.05 | 0.80 | 0.55 | 0.26 | 0.14 | 0.13 | 0.16 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1916 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 619 | 819 | 783 | 716 | 884 | 1637 | 1693 | 1179 | 884 | 606 | 465 | 501 |
MAX | 3650 | 2492 | 3105 | 2675 | 3613 | 4162 | 4961 | 3786 | 3610 | 2902 | 2964 | 2926 |
(WY) | 1987 | 1986 | 1983 | 1960 | 1938 | 1918 | 1993 | 1973 | 2000 | 1938 | 1924 | 1972 |
MIN | 31.8 | 147 | 185 | 142 | 168 | 274 | 237 | 150 | 110 | 57.7 | 31.4 | 52.9 |
(WY) | 1957 | 1954 | 1940 | 1940 | 1940 | 1934 | 1934 | 1934 | 1934 | 1934 | 1934 | 1934 |
SUMMARY STATISTICS | FOR 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1916 - 2005 | |||
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ANNUAL TOTAL | 408107 | 242766 | ||||
ANNUAL MEAN | 1115 | 665 | 898 | |||
HIGHEST ANNUAL MEAN | 1936 | 1993 | ||||
LOWEST ANNUAL MEAN | 202 | 1934 | ||||
HIGHEST DAILY MEAN | 6020 | May 31 | 2500 A | Feb 19-21 | 6610 | Apr 2 1979 |
LOWEST DAILY MEAN | 185 | Oct 3 | 89 | Jul 18 | 12 | B |
ANNUAL SEVEN-DAY MINIMUM | 202 | Oct 1 | 115 | Sep 7 | 19 | Oct 16 1956 |
MAXIMUM PEAK FLOW | 2600 C | Feb 18 | 6720 D | May 22 2004 | ||
MAXIMUM PEAK STAGE | 2.38 E | Feb 17 | 4.50 F | Apr 1 1916 | ||
INSTANTANEOUS LOW FLOW | 62 | Jul 18 | 0.00 | G | ||
ANNUAL RUNOFF (CFSM) | 0.795 | 0.474 | 0.640 | |||
ANNUAL RUNOFF (INCHES) | 10.82 | 6.44 | 8.70 | |||
10 PERCENT EXCEEDS | 2920 | 1440 | 2020 | |||
50 PERCENT EXCEEDS | 636 | 597 | 604 | |||
90 PERCENT EXCEEDS | 324 | 141 | 190 |
G - Nov. 26, 1952; Nov. 20, 1953; Oct. 25, 1956 and Sept. 9, 14, 1958; result of windstorms. |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |