Station list

05536995 CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL



LOCATION.--Lat 41°38'26", long 88°03'38", in SE¼SW¼ 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-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 1997 TO SEPTEMBER 1998
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
12762 e2266 1815 1794 2655 1997 4390 2841 2436 3407 2885 3236 
22497 e1805 1938 1984 2928 2107 3783 2814 2301 3059 2870 2744 
32599 e1991 2011 2039 2999 1993 3471 2111 2618 3373 2680 2688 
42897 2024 1741 6237 2398 2289 3123 2927 2312 5528 7362 3036 
52698 2021 1838 5338 2576 2112 3538 2603 2250 4386 7786 2822 
 
62516 2586 1926 5966 2243 1877 2239 3206 2491 3414 5889 e2757 
72900 2077 1647 5067 2200 2200 3361 12470 2270 4475 6013 e6357 
83025 1929 1743 7993 2106 4880 4422 12116 2323 4678 5207 e4127 
93211 1998 1951 5990 2240 6564 4553 8185 3662 3644 4513 e2974 
103074 1870 3208 4937 2057 4786 3466 5062 3471 3779 3839 e2757 
 
112952 1684 2943 3863 5296 4413 3805 4184 6574 3392 4130 2817 
123036 2118 2709 3374 3921 3897 3427 3795 4341 3272 3673 2496 
133032 1814 2435 2751 3500 3127 2922 3407 3867 3503 3600 2878 
142286 2004 2138 2689 3305 3732 3423 3341 3983 3402 3328 2958 
152066 2429 1776 2639 2809 2893 3360 2752 2459 3674 e3250 3332 
 
162167 2472 2089 2067 2940 2683 2893 2672 3050 3365 e3311 3007 
172097 2035 1692 2317 4069 5209 3134 2625 2766 3585 e2817 3013 
181999 1671 1798 2117 5414 8180 3204 2496 3319 3808 3089 2624 
192297 1929 1905 1891 4162 7369 2720 2739 3416 3894 3386 2659 
201774 1742 1871 2253 3247 5599 3150 2230 3521 3972 3092 2758 
 
211893 1851 1755 1935 3229 4568 4475 2128 2983 3011 3061 3217 
222024 1549 2118 2123 2947 4464 3896 2201 2730 3173 e3854 2475 
231937 1642 2434 2379 2462 3565 3521 2360 2677 3698 e3542 2522 
242369 1817 2861 1896 2322 2823 2820 3466 2663 3130 e4765 2302 
252050 1764 3791 1808 2571 2825 3716 2825 3257 3146 5682 2512 
 
263187 1783 e1480 2246 2252 2646 3281 2437 4277 2839 3846 2435 
275309 1956 2500 1682 2241 2669 3112 2271 5007 2602 3868 2418 
282930 2574 2022 2090 2539 3223 2869 2539 4775 3058 3598 2613 
292826 2714 2014 2441 --- 2802 3549 2686 3880 2736 3821 3223 
302557 2150 1993 2272 --- 2603 2976 2272 3317 2714 3326 3223 
 
312245 --- 1739 2287 --- 5264 --- 2159 --- 2805 2727 --- 

TOTAL81212602656588196465836281153591025991119209899610852212481088980
MEAN262020092125311229873721342036103300350140262966
MAX5309271437917993541481804553124706574552877866357
MIN177415491480168220571877223921112250260226802302

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 1998, BY WATER YEAR (WY)
MEAN304030872661295329513246376736374064408440983747
MAX409844193373434749754084519450536405477047234974
(WY)199219911991199319971993199219921993199619931992
MIN262020091964225221922186253423703288350134462966
(WY)199819981996199619961996199719941995199819961998

SUMMARY STATISTICSFOR 1997 CALENDAR YEARFOR 1998 WATER YEARWATER YEARS 1991 - 1998
ANNUAL TOTAL1149296     1138637         
ANNUAL MEAN3149     3120         3446         
HIGHEST ANNUAL MEAN4074         1993
LOWEST ANNUAL MEAN3095         1994
HIGHEST DAILY MEAN17281         Feb 2112470             May 717530         Nov 28 1990
LOWEST DAILY MEAN1480  A    Dec 261480      A    Dec 261480      ADec 26 1997
ANNUAL SEVEN-DAY MINIMUM1740         Nov 201740             Nov 201740         Nov 20 1997
INSTANTANEOUS PEAK FLOW14909      B    May 719466      CFeb 21 1997
INSTANTANEOUS PEAK STAGE26.27 D    Mar 1626.43 EFeb 4 1996
INSTANTANEOUS LOW FLOW-321             Mar 16 F
10 PERCENT EXCEEDS4250     4560         5040         
50 PERCENT EXCEEDS2860     2820         3070         
90 PERCENT EXCEEDS1950     1930         2110         
A - Estimated by regression.
B - Gage height, 21.43 ft.
C - Gage height, 23.95 ft.
D - No flow.
E - Discharge, 2,876 ft3/s.
F - No flow or periods of reverse flow at times in most years.

Introduction

Surface-Water Data

Ground-Water Data

Precipitation Data

Biological Data