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 2000 TO SEPTEMBER 2001
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 113    34    111      78  e29  e34    286  44      148    -13  104  321 
2 109    169    94      11  e29  e65    166  72      -78    178  329  168 
3 5.7 8.1 184      46  e39  e55    154  8.6   26    232  73  110 
4 76    97    87      124  e80  e80    109  -36      64    708  187  229 
5 -46    314    150      76  e80  e100    96  107      -132    435  289  259 
 
6 -193    174    125      25  e39  e70    110  85      223    227  166  297 
7 7.8 102    8.9   71  e60  e24    59  32      143    -40  159  150 
8 185    -78    6.2   97  e75  56    -114  -36      -5.2 188  94  187 
9 145    -156    98      44  e24  50    102  122      165    43  448  279 
10 50    -26    86      40  e14  78    -52  117      144    443  181  229 
 
11 80    108    126      58  e34  44    217  98      228    56  252  255 
12 82    100    207      32  e85  -60    247  107      590    329  255  236 
13 -5.8 195    -11      109  e60  1.4 147  -18      -67    67  216  272 
14 211    -192    -49      34  e55  19    12  132      210    -171  283  326 
15 152    151    397      13  e65  28    131  45      569    108  251  284 
 
16 -44    336    -0.25 112  e55  -10    43  102      -12    147  168  283 
17 -27    190    208      100  e24  39    78  0.82 157    77  281  229 
18 198    63    264      -54  e44  112    55  115      542    -53  186  245 
19 58    26    -13      163  e55  93    159  193      329    558  292  285 
20 104    53    -203      87  e60  77    135  51      204    331  284  196 
 
21 211    -41    -123      40  e96  125    286  -73      240    110  150  153 
22 123    45    56      e44  e60  86    97  49      238    56  385  248 
23 112    80    130      e55  e60  162    82  94      229    34  207  570 
24 98    3.4 34      e101  e50  192    30  22      -157    57  409  64 
25 164    122    -3.2   e39  e14  311    15  65      196    131  271  27 
 
26 84    123    -36      e50  e19  126    54  157      340    119  303  236 
27 -76    41    84      e75  e60  89    35  0.21 375    36  305  477 
28 71    186    82      e70  e39  24    23  -24      279    -57  328  553 
29 58    41    13      e75  ---  92    -56  93      68    -115  323  474 
30 131    161    22      e39  ---  91    -14  56      47    176  88  243 
 
31 77    ---    -79      e39  ---  84    ---  21      ---    130  766  --- 

TOTAL 2313.7 2429.5 2055.65 1893 1404 2337.4 2692 1801.63 5302.8 4527 8033 7885
MEAN 74.6 81.0 66.3 61.1 50.1 75.4 89.7 58.1 177 146 259 263
MAX 211 336 397 163 96 311 286 193 590 708 766 570
MIN -193 -192 -203 -54 14 -60 -114 -73 -157 -171 73 27
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1997 - 2001, BY WATER YEAR (WY)
MEAN 231 64.6 56.0 62.5 54.2 62.6 87.7 95.9 278 393 385 356
MAX 490 81.0 68.4 79.5 63.8 95.5 107 150 435 559 567 451
(WY) 1997 2001 2000 1997 1998 1997 1998 1997 1997 1998 1998 1998
MIN 74.6 49.8 32.3 36.9 42.3 33.3 67.6 54.9 151 146 259 263
(WY) 2001 1999 1999 1999 1997 2000 2000 2000 2000 2001 2001 2001

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1997 - 2001
ANNUAL TOTAL 49764.32 42674.68
ANNUAL MEAN 136      117      178     
HIGHEST ANNUAL MEAN 238      1997
LOWEST ANNUAL MEAN 117      2001
HIGHEST DAILY MEAN 962          Sep 5 766          Aug 31 1069  A Jun 21 1997
LOWEST DAILY MEAN -203          Dec 20 -203          Dec 20 -769  B Feb 21 1997
ANNUAL SEVEN-DAY MINIMUM -21          Dec 20 -21          Dec 20 -98  B Feb 21 1997
10 PERCENT EXCEEDS 338      285      466     
50 PERCENT EXCEEDS 98      87      94     
90 PERCENT EXCEEDS -24      -13      27     

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