Station list     Available data
ILLINOIS RIVER BASIN


05568000       MACKINAW RIVER NEAR GREEN VALLEY, IL



LOCATION.-- Lat 40°27'15", long 89°36'22", in SE1/4SE1/4 sec.12, T.23 N., R.5 W., Tazewell County, Hydrologic Unit 07130004, on right downstream side of bridge on Towerline Road, 2.5 mi east of State Highway 29, 3.9 mi northeast of Green Valley, 5.8 mi south of Pekin, 10.2 mi north of U.S. Highway 136, and at mile 17.3.

DRAINAGE AREA.-- 1,073 mi2. Area at site used prior to Oct. 1, 1988, 1,089 mi2.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: March 1921 to October 1956; October 1988 to current year.

 

STAGE: Water years 1994-2001.

 

PARTIAL RECORD: Annual maximum, water years 1957-88.

SURFACE-WATER QUALITY
 

CHEMICAL: October 1997 to September 1998.

 

SEDIMENT: October 1994 to September 1997.

 

MISCELLANEOUS: Contaminants of streambed sediment, July 1997; contaminants of fish tissue, July 1997; streambank sediment size, October 1997; Streambed sediment size, October 1997.

BIOLOGICAL
 

BENTHIC MACROINVERTEBRATES: Water year 1996.

 

FISH: Water year 1997.

 

HABITAT: Water year 1996.


GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 477.10 ft above sea level (levels by U.S. Army Corps of Engineers). Prior to Jan. 17, 1933, chain gage at site 3.5 mi downstream on railroad bridge at datum 2.00 ft higher. Jan. 17, 1933, to May 13, 1940, chain gage, and May 14, 1940 to Sept. 30, 1952, wire-weight gage at site 3.6 mi downstream at datum 2.00 ft higher. Oct. 1, 1952 to Oct. 31, 1956, wire-weight gage, and Nov. 1, 1956 to Sept. 30, 1988, crest-stage gage at site 3.6 mi down stream at present datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 51,000 ft3/s, Dec. 6, 1982, gage height, 16.13 ft (backwater from ice), site then in use; maximum recorded gage height, 28.29 ft, Sept. 16, 1993 (discharge unknown); minimum discharge observed, 17 ft3/s, Oct. 26, 27, 1940.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 6,160 mg/L, May 27, 1996; minimum daily, 4 mg/L, May 11, 1997.
SUSPENDED-SEDIMENT LOADS: Maximum daily 99,800 tons, May 27, 1996; minimum daily, 0.83 tons, Dec. 21, 1996.

REMARKS FOR CURRENT YEAR.-- Records good except those for Apr. 12-19, which are fair, and those for Aug. 7-21 and estimated discharges, which are poor.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
136 25 52 e33 e1900 2450 674 839 1010 331 83 62 
234 26 50 e34 e1800 1980 642 800 1310 306 83 53 
333 25 47 e35 1510 1660 600 748 1160 340 82 51 
439 27 45 e37 1230 1430 557 688 1200 430 79 47 
555 26 44 42 989 1270 636 658 1240 384 70 45 
 
650 29 40 44 834 1140 893 633 3050 369 e71 47 
740 63 44 45 872 1050 1370 620 3710 309 69 49 
840 51 42 44 1230 988 2210 586 3150 274 67 45 
938 48 39 46 7380 928 1650 556 2350 251 64 44 
1035 82 43 43 6950 870 1540 523 1900 236 71 50 
 
1135 90 51 42 5840 833 2950 557 1600 244 61 43 
1238 97 56 43 3550 818 3830 528 1370 223 55 41 
1333 93 53 44 2350 823 3130 489 1200 199 52 39 
1431 79 47 50 2060 798 2280 472 1060 177 50 36 
1532 72 48 59 2140 781 1870 479 963 159 48 35 
 
1635 70 48 74 2170 1050 1610 478 855 147 44 33 
1730 64 e42 70 1820 1550 1360 477 772 136 50 33 
1827 62 e39 66 1470 1870 1180 3500 713 133 38 34 
1926 60 e36 e64 1260 1860 1080 2050 657 128 42 62 
2026 58 e34 e61 1120 1640 1030 1640 601 123 43 53 
 
2126 50 e32 e59 975 1410 1040 1330 631 120 47 47 
2225 51 e32 e57 873 1240 1750 1130 625 123 54 48 
2325 51 e31 e56 819 1110 2190 972 583 128 126 50 
2426 49 e31 e54 1330 1010 1810 857 530 168 126 53 
2528 51 e30 e53 5930 921 1550 772 483 142 113 46 
 
2628 57 e30 e52 6300 851 1410 744 447 143 109 41 
2726 61 e30 e51 5850 807 1240 747 416 126 92 38 
2826 52 e30 e50 3910 772 1090 765 392 109 78 35 
2925 53 e31 187 --- 750 962 759 372 100 67 33 
3023 54 e31 1440 --- 727 884 678 356 92 61 32 
 
3123 --- e32 e1800 --- 700 --- 703 --- 86 70 --- 

TOTAL9941676124048357446236087450182677834706623621651325
MEAN32.155.940.0156265911641501864115720169.844.2
MAX55975618007380245038303500371043012662
MIN23253033819700557472356863832
CFSM.03.05.04.152.481.081.40.811.08.19.07.04
IN..03.06.04.172.581.251.56.931.20.22.08.05

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1921 - 2001, BY WATER YEAR (WY)
MEAN293409449694979108413321282876559277346
MAX352534172425351430663629499657562704310924046057
(WY)192719271928199319271993194419431999195119241993
MIN19.821.826.329.634.149.368.879.953.237.128.623.7
(WY)194119411941194019311931193119341934198819881940

SUMMARY STATISTICSFOR 2000 CALENDAR YEARFOR 2001 WATER YEARWATER YEARS 1921 - 2001
ANNUAL TOTAL55831     235522     
ANNUAL MEAN153     645     718         
HIGHEST ANNUAL MEAN2353         1993
LOWEST ANNUAL MEAN98.4      1940
HIGHEST DAILY MEAN2260         May 287380         Feb 923500         Apr 24 1944
LOWEST DAILY MEAN23         Oct 30-3123         Oct 30-3117         A
ANNUAL SEVEN-DAY MINIMUM25         Oct 2825         Oct 2818         Oct 21 1940
MAXIMUM PEAK FLOW7800         Feb 951000      BDec 6 1982
MAXIMUM PEAK STAGE24.26    Feb 9 CSep 16 1993
INSTANTANEOUS LOW FLOW23         Oct 30-3117      DA
ANNUAL RUNOFF (CFSM).14.60.67    
ANNUAL RUNOFF (INCHES)1.948.179.09    
10 PERCENT EXCEEDS349     1700     1780         
50 PERCENT EXCEEDS60     113     252         
90 PERCENT EXCEEDS32     33     43         

A - Oct. 26-27, 1940.
B - Gage height, 16.13 ft, backwater from ice, site then in use.
C - Maximum recorded, 28.29 ft; discharge unknown.
D - Observed.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data