Station list     Available data
ILLINOIS RIVER BASIN


05536358       CALUMET RIVER BELOW O'BRIEN LOCK AND DAM AT CHICAGO, IL

 

LOCATION.-- Lat 41°38'53", long 87°33'50" (NAD of 1927), in SE1/4SE1/4 sec.36, T.37 N., R.14 E., Cook County, Hydrologic Unit 07120003, on right bank, 0.7 mi downstream of 130th Street in Chicago, and 1100 ft below the downstream lock gates at the Thomas J. O'Brien Lock and Dam, and at mile 6.9.
 

DRAINAGE AREA.-- Indeterminate.
 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1996 to cuurent year.
 

GAGE.-- Water stage recorder, acoustical flowmeter, and phone telemeter. Datum of gage is 579.48 ft above NGVD of 1929 (Chicago City datum).
 

REMARKS.-- This gaging station provides flow data 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 stormwater runoff from a 673 mi2 diverted watershed area. Estimated daily discharges determined from regression equations between USGS mean daily discharges and mean daily discharges for the Obrien Lock and Dam as reported by the Metropolitan Water Reclamation District.
 

EXTREMES FOR PERIOD OF RECORD.-- --Maximum daily discharge, 1069 ft3/s (estimated), June 21,1997; mimimum daily, -769 ft3/s, Feb. 21, 1997, due to regulation to prevent flooding.
 

REMARKS FOR CURRENT YEAR.--Records fair except those for estimated daily discharges, which are poor.
Discharge, cubic feet per second, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 189  53    84    65      122    43    90      -43      -2.3 -33  552  306 
2 161  59    -27    96      -14    39    70      159      -51    177  300  405 
3 220  52    31    68      142    82    14      5.3   262    432  306  750 
4 232  32    79    -30      149    -21    47      -85      312    212  418  520 
5 144  8.1 119    52      10    70    75      -96      166    187  194  962 
 
6 256  62    38    -0.87 -12    -23    60      -33      357    231  160  561 
7 162  60    63    34      80    -60    44      -35      129    246  207  378 
8 141  46    55    14      8.7 -52    1.2   -60      9.5 221  89  315 
9 236  104    67    36      39    1.7 116      262      121    127  293  389 
10 199  55    -38    51      50    60    64      68      108    466  228  320 
 
11 269  32    146    -13      -15    9.6 75      54      -16    238  485  180 
12 84  122    101    151      64    -71    170      68      65    333  346  209 
13 124  -13    80    25      105    57    59      15      154    541  331  429 
14 198  42    126    32      68    -60    53      32      160    449  334  358 
15 38  66    58    147      -50    -62    -26      61      68    388  282  298 
 
16 45  78    66    96      8.6 60    -12      93      139    583  247  237 
17 193  108    53    206      23    89    0.40 110      206    465  39  186 
18 216  72    150    19      102    110    142      153      415    569  337  298 
19 110  36    91    -39      6.6 22    100      135      324    839  255  290 
20 79  56    -23    -39      39    119    73      105      177    340  185  43 
 
21 77  112    61    100      143    179    -14      125      170    653  329  226 
22 41  89    114    60      49    -8.2 125      99      50    388  204  226 
23 38  99    43    129      49    90    81      -36      130    630  363  319 
24 77  47    103    103      40    35    110      0.04 223    536  535  173 
25 108  72    81    179      79    29    74      121      37    203  403  85 
 
26 28  18    13    140      80    -29    134      121      52    572  291  134 
27 115  5.2 21    117      21    22    -1.8   -81      173    183  297  224 
28 194  -66    188    87      89    18    146      46      33    210  337  309 
29 227  18    5.4 70      46    187    90      138      249    516  300  118 
30 115  8.0 101    56      ---    44    67      66      312    384  251  42 
 
31 200  ---    71    154      ---    53    ---      134      ---    234  277  --- 

TOTAL 4516 1532.3 2120.4 2165.13 1521.9 1033.1 2026.80 1701.34 4532.2 11520 9175 9290
MEAN 146 51.1 68.4 69.8 52.5 33.3 67.6 54.9 151 372 296 310
MAX 269 122 188 206 149 187 170 262 415 839 552 962
MIN 28 -66 -38 -39 -50 -71 -26 -96 -51 -33 39 42


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1997 - 2000, BY WATER YEAR (WY)
MEAN 270 60.6 53.4 62.9 55.2 59.4 87.2 105 303 455 416 379
MAX 490 71.8 68.4 79.5 63.8 95.5 107 150 435 559 567 451
(WY) 1997 1997 2000 1997 1998 1997 1998 1997 1997 1998 1998 1998
MIN 146 49.8 32.3 36.9 42.3 33.3 67.6 54.9 151 372 296 310
(WY) 2000 1999 1999 1999 1997 2000 2000 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1997 - 2000
ANNUAL TOTAL 60177.7 51134.17
ANNUAL MEAN 165    140      193       
HIGHEST ANNUAL MEAN 238        1997
LOWEST ANNUAL MEAN 140        2000
HIGHEST DAILY MEAN 819        Jul 26 962          Sep 5 1069    A Jun 21 1997
LOWEST DAILY MEAN -66        Nov 28 -96          May 5 -769    B Feb 21 1997
ANNUAL SEVEN-DAY MINIMUM 5.7     Nov 26 -21          May 2 -98    B Feb 21 1997
10 PERCENT EXCEEDS 383    337      484       
50 PERCENT EXCEEDS 78    96      97       
90 PERCENT EXCEEDS 28    -4.1   32       

A - Estimated by regression.

B - Due to regulation to prevent flooding.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data