Station list     Available data
ILLINOIS RIVER BASIN


05536995                   CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL



LOCATION.--Lat 41°38'26", long 88°03'38", in SE1/4SW1/4 sec.35, T.37 N., R.10 E., Will County, Hydrologic Unit 07120004, on left bank 40 ft upstream from bridge on Romeoville Road in Romeoville, 5.2 mi upstream from Lockport Lock and Dam, and at mile 6.2.

DRAINAGE AREA.--739 mi2.

PERIOD OF RECORD.--October 1984 to current year.

REVISED RECORDS.--WDR IL-86-2: 1985. WDR IL-89-2: 1986. WDR IL-92-2: 1986-89.

GAGE.--Acoustical flowmeter. Datum of gage is 551.89 ft above sea level (U.S. Army Corps of Engineers bench mark).

REMARKS.--Records good except those for estimated daily discharges, which are fair. Estimated daily discharges determined from a regression relation between present site and the previous site 5.2 mi downstream.

This gaging station provides flow data essential to determine Illinois' diversion of Lake Michigan water. A U.S. Supreme Court Decree limits Illinois' diversion to an average of 3,200 ft3/s. Illinois' diversion includes water diverted from the lake for domestic water supply, for navigation and water-quality improvement in the Chicago Sanitary and Ship Canal system, and the stormwater runoff from a 673 mi2 diverted watershed area. Flows recorded at this station also include nondiversion flows. Gage-height telemeter at station.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
12601 2586 2019 e1372 3242 2393 1861 4340 5008 3335 3647 2908 
22672 2224 1651 e1576 3588 2088 1768 3589 8652 3364 2817 2608 
33319 1525 1604 e1465 3423 2274 2050 2792 5277 2788 3013 2751 
43204 1866 1675 e1503 e2663 2523 2198 2829 4260 2764 2932 3246 
52592 2548 1886 e1471 3078 2124 1995 2475 3098 2830 3130 2909 
 
62894 1897 3377 e1747 2668 2441 1892 3128 2747 2719 2739 2847 
72817 1778 4277 1569 2643 2915 1746 2953 2554 2690 3199 3243 
82148 1957 2875 1646 2328 2360 2451 2198 2801 2697 2872 2386 
92592 2000 2564 1813 2147 2300 7942 2248 2596 2677 3033 2340 
102308 4763 2313 1697 2190 2353 4840 1745 4003 2973 2445 2469 
 
112530 3473 2154 1730 2993 2312 3880 2448 4985 2545 3249 2276 
121970 2819 1749 1707 2214 2498 3769 4865 4451 2590 4051 2361 
132080 2661 2080 1713 2377 2986 2999 3459 e11680 2733 2828 2325 
142100 2536 1785 1745 2352 2590 3156 3081 e6139 2815 3197 2350 
152067 2399 1669 1722 1851 2492 3435 3137 4633 2801 4125 2482 
 
161913 1832 1739 1793 2314 2636 7452 2567 3757 e2803 3038 2168 
175795 1699 1634 2568 1912 3799 5888 4723 3373 3164 2595 2047 
185339 1787 1787 3214 1924 3814 4452 2714 e2838 3377 2870 2287 
193132 1789 1553 2538 2469 2742 3578 2650 2591 e3802 4087 2144 
202954 1829 1587 2215 2095 2584 3386 2565 2710 3868 3832 2008 
 
212398 1785 1569 2635 1844 2533 4052 3160 2629 e5407 3251 2309 
222428 1731 1598 9745 1654 2315 7106 3554 3373 4051 3496 2150 
232287 1683 1414 10981 1804 2366 10973 3609 2660 3828 3514 2070 
242368 1645 1703 8973 1869 2415 7139 2807 3882 3562 3630 2202 
252529 1437 1545 7550 2100 1894 6144 e2187 3010 4041 3680 2207 
 
262122 1603 1263 5118 2036 1893 4071 e1618 3358 3463 3981 2033 
272228 1575 1502 4354 2961 1747 6490 2020 3549 3002 3206 3153 
282979 1625 1481 4662 2321 2134 7852 1815 2637 3102 3185 7202 
292928 1644 1815 4302 --- 1614 7123 2171 2711 e3309 3127 4173 
302650 1812 1555 3628 --- 1667 4759 2051 2537 e3219 2919 2762 
 
312985 --- 1605 3641 --- 1899 --- 2631 --- 3599 3023 --- 

TOTAL8492962508590281023936706074701136447881291184999991810071180416
MEAN274020841904330323952410454828433950322332492681
MAX579547634277109813588381410973486511680540741257202
MIN191314371263137216541614174616182537254524452008

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1985 - 1999, BY WATER YEAR (WY)
MEAN330431742770296530153331360836124043420744404102
MAX524452443991434749754791519454916405542668305181
(WY)198719861988199319971985199219901993198619871986
MIN262020091904225221922186253423703288322332492681
(WY)199819981999199619961996199719941995199919991999

SUMMARY STATISTICSFOR 1998 CALENDAR YEARFOR 1999 WATER YEARWATER YEARS 1985 - 1999
ANNUAL TOTAL1137744 1074739         
ANNUAL MEAN3117 2944         3550         
HIGHEST ANNUAL MEAN4113         1986
LOWEST ANNUAL MEAN2944         1999
HIGHEST DAILY MEAN12470     May 711680      A    Jun 1317870         May 10 1990
LOWEST DAILY MEAN1263     Dec 261263             Dec 261263         Dec 26 1998
ANNUAL SEVEN-DAY MINIMUM1500     Dec 221500             Dec 221500         Dec 22 1998
INSTANTANEOUS PEAK FLOW14623      B    Jan 2319466      CFeb 21 1997
INSTANTANEOUS PEAK STAGE26.23 D    Apr 2926.43 EFeb 4 1996
INSTANTANEOUS LOW FLOW-4088             Dec 12 F
10 PERCENT EXCEEDS4710 4320         5220         
50 PERCENT EXCEEDS2820 2600         3160         
90 PERCENT EXCEEDS1790 1700         2170         
A - Estimated by regression.
B - Gage height, 21.04 ft.
C - Gage height, 23.95 ft.
D - Discharge, 3,483 ft3/s.
E - Discharge, 2,876 ft3/s.
F - No flow or periods of reverse flow at times in most years.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data