Station list     Available data
ILLINOIS RIVER BASIN


05536995       CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL



LOCATION.-- Lat 41°38'27", long 88°03'35", 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.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1984 to current year.

 

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1987-92 and 1999-2000.

 

WATER TEMPERATURE: Water years 1974-77.


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

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

REMARKS.-- 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.

EXTREMES FOR PERIOD RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 19,466 ft3/s, Feb. 21, 1997, gage-height, 23.95 ft; maximum gage-height, 26.43 ft, Feb. 4, 1996; minimum discharge, no flow or periods of reverse flow at times in most years.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are fair.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
1e3021 1655 1567 1725 1645 1775 1728 2222 4331 2696 3193 2850 
2e2537 1523 1473 1247 1660 e1239 1569 2285 3756 2746 3128 3122 
33270 1465 1798 1412 1385 1939 1149 2219 e3590 6896 3017 2789 
43376 1318 2502 1905 1749 1788 1394 1671 2760 4636 2956 3180 
52643 1407 7096 1723 1649 1854 1926 2043 4313 3491 3185 2946 
 
62832 1596 3591 1975 1622 1736 1597 2143 3676 3172 3932 2848 
72658 1342 2493 1170 1346 1628 1987 2039 2820 2987 3676 2714 
81965 1622 2448 1497 1452 1756 3005 2111 2683 3031 2841 2742 
92090 1418 2238 1860 1639 1727 2187 6392 2556 2469 e2505 2751 
102026 1581 1975 2086 1702 1552 1836 3276 2587 6636 3019 2836 
 
111948 1575 1873 2064 e2201 1436 2004 e3599 3002 4613 3110 7069 
122156 1335 1564 1255 1940 e1098 1860 3330 4513 4221 2620 11340 
132074 1443 1881 1835 1525 1769 2019 3508 5692 3863 2651 4740 
141967 1471 1636 1346 1577 1706 1838 3160 6142 3077 2486 4908 
151996 1662 2404 1771 1632 e1449 1501 3522 4909 3191 2677 4140 
 
16e1638 1345 1910 1503 1240 2083 2176 2417 3933 2730 e2026 3709 
172032 1413 1614 1501 1802 1238 4653 2728 3286 2812 e4407 3132 
181825 e1025 1686 1750 1884 2128 3420 2353 3010 2739 3931 2863 
191589 e1303 1645 1558 1728 2029 4141 3151 2398 2939 3275 3221 
20e1260 1271 1620 1477 2004 2778 11563 3082 3802 2611 2981 3122 
 
21e1099 1582 e1162 1697 2065 1901 10619 e2667 4987 2673 2610 2963 
221388 1658 e941 1342 2873 1811 e7457 2527 4230 2707 2608 4581 
231446 2443 e1650 1499 3341 1749 e5679 2417 e2495 2677 2913 4542 
241702 1712 e1413 1684 3823 2126 3435 2082 e4718 2742 2652 4843 
251655 1781 e1333 e1352 4146 1408 3451 2040 5725 2511 2660 3777 
 
261389 1753 1599 1495 3271 1693 3444 1997 5485 2666 e1950 2924 
271726 1132 e1113 1757 2656 1964 3027 2322 e4480 2649 2597 2681 
28997 1421 e1380 1638 2366 1271 2143 4816 3327 2964 2762 3000 
292143 1662 1749 e1348 2088 1638 2017 3349 3116 3135 2578 2593 
301859 1418 1573 1831 --- 1647 2006 3032 2909 3734 2682 2235 
 
312252 --- 1567 1663 --- 1823 --- 4338 --- 3282 2806 --- 

TOTAL625594533260494499666001153739968318883811523110329690434111161
MEAN201815111951161220691734322828663841333229173705
MAX33762443709620864146277811563639261426896440711340
MIN9971025941117012401098114916712398246919502235

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1985 - 2000, BY WATER YEAR (WY)
MEAN322330702719288129543231358435664030415243444077
MAX524452443991434749754791519454916405542668305181
(WY)198719861988199319971985199219901993198619871986
MIN201815111904161220691734253423703288322329172681
(WY)200020001999200020002000199719941995199920001999

SUMMARY STATISTICSFOR 1999 CALENDAR YEARFOR 2000 WATER YEARWATER YEARS 1985 - 2000
ANNUAL TOTAL1036659     937892         
ANNUAL MEAN2840     2563         3488         
HIGHEST ANNUAL MEAN4113         1986
LOWEST ANNUAL MEAN2563         2000
HIGHEST DAILY MEAN11680  A    Jun 1311563             Apr 2017870         May 10 1990
LOWEST DAILY MEAN941  A    Dec 22941      A    Dec 22941      ADec 22 1999
ANNUAL SEVEN-DAY MINIMUM1320         Dec 211320             Dec 211320         Dec 21 1999
INSTANTANEOUS PEAK FLOW15232      B    Sep 1219466      CFeb 21 1997
INSTANTANEOUS PEAK STAGE26.32 D    May 1326.43 EFeb 4 1996
INSTANTANEOUS LOW FLOW-5148             Oct 28F
10 PERCENT EXCEEDS4210     4140         5190         
50 PERCENT EXCEEDS2540     2150         3110         
90 PERCENT EXCEEDS1570     1410         2090         
A - Estimated by regression.
B - Gage height, 22.14 ft.
C - Gage height, 23.95 ft.
D - Discharge, 1,300 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