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LOCATION.-- Lat 41°53'18", long 87°36'27" (NAD of 1927), in NE1/4 SE1/4 sec.10, T.39 N., R.14 E., Cook County, Hydrologic Unit 04060200, on the lakeside of the downstream left guidewall, approximately 75 ft west of the riverside gates of the Chicago Lock. |
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DRAINAGE AREA.-- Indeterminate. |
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PERIOD OF RECORD.-- |
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STAGE: August 1997 to current year. |
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GAGE.-- Water-stage recorder, phone telemeter, air temperature thermocouple, anemometer, and rain gage. Datum of gage is 579.48 ft above NGVD of 1929 (Chicago City Datum). |
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REMARKS.-- Gage provides stage data to determine Illinois' diversion of Lake Michigan water. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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STAGE: Maximum gage height, 3.84 ft, May 31, 1998; minimum, -3.79 ft., Feb 11, 2002, exaggerated due to wave action. |
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EXTREMES FOR CURRENT YEAR.-- Maximum gage height, 1.26 ft, June 3; minimum, -3.79 ft, Feb. 11, instantaneous annual extremes are exaggerated due to wave action. |
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| GAGE HEIGHT (CR10), in FEET, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES |
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| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | -0.87 | -1.79 | -0.97 | -0.94 | -0.87 | -1.32 | -1.16 | -0.53 | -0.41 | -0.14 | -0.17 | -0.13 |
| 2 | -0.89 | -1.05 | -1.37 | -1.04 | -1.53 | -1.01 | -0.96 | -0.59 | -0.18 | -0.16 | -0.05 | -0.47 |
| 3 | -0.99 | -0.95 | -0.98 | -1.23 | -1.35 | -1.24 | -1.13 | -0.75 | -0.10 | -0.14 | -0.03 | -0.39 |
| 4 | -1.00 | -0.86 | -0.92 | -1.48 | -1.31 | -1.58 | -1.15 | -0.66 | -0.04 | 0.03 | -0.02 | -0.37 |
| 5 | -0.94 | -0.97 | -1.66 | -1.20 | -1.58 | -1.39 | -1.07 | -0.59 | -0.14 | 0.10 | 0.08 | -0.26 |
| 6 | -1.07 | -1.09 | -1.24 | -0.84 | -1.60 | -1.08 | -1.22 | -0.59 | -0.14 | 0.0 | 0.04 | -0.32 |
| 7 | -1.19 | -0.82 | -0.81 | -1.12 | -1.53 | -1.07 | -1.72 | -0.42 | -0.18 | -0.08 | 0.0 | -0.33 |
| 8 | -1.68 | -0.77 | -0.68 | -1.54 | -1.33 | -1.43 | -1.02 | -0.42 | -0.30 | -0.05 | -0.05 | -0.35 |
| 9 | -1.96 | -1.30 | -1.03 | -1.31 | -1.01 | -2.16 | -0.99 | -0.49 | -0.18 | 0.17 | -0.09 | -0.33 |
| 10 | -2.12 | -0.87 | -1.25 | -1.19 | -0.70 | -1.78 | -1.09 | -0.81 | -0.20 | 0.21 | -0.18 | -0.28 |
| 11 | -1.16 | -0.95 | -1.01 | -1.26 | -1.92 | -2.12 | -1.02 | -0.57 | -0.31 | 0.02 | -0.22 | -0.43 |
| 12 | -0.87 | -0.99 | -0.96 | -1.16 | -1.59 | -1.23 | -0.96 | -0.11 | -0.13 | 0.03 | -0.30 | -0.48 |
| 13 | -1.20 | -1.26 | -0.84 | -1.42 | -1.74 | -1.22 | -0.89 | -0.35 | -0.13 | 0.02 | -0.29 | -0.58 |
| 14 | -0.82 | -1.01 | -0.73 | -0.98 | -2.35 | -0.98 | -0.87 | -0.56 | -0.06 | -0.02 | -0.17 | -0.43 |
| 15 | -1.09 | -0.96 | -1.13 | -0.90 | -1.74 | -0.80 | -1.02 | -0.82 | -0.11 | -0.04 | -0.43 | -0.20 |
| 16 | -0.76 | -0.77 | -1.14 | -1.25 | -1.30 | -0.99 | -1.35 | -0.38 | -0.25 | -0.06 | -0.35 | -0.41 |
| 17 | -1.14 | -0.84 | -0.67 | -1.17 | -1.37 | -1.05 | -0.98 | -0.32 | -0.10 | -0.17 | -0.56 | -0.49 |
| 18 | -1.82 | -1.03 | -1.03 | -1.31 | -2.01 | -0.94 | -1.13 | -0.30 | 0.03 | 0.04 | -0.54 | -0.52 |
| 19 | -0.97 | -0.90 | -0.78 | -1.41 | -1.77 | -1.01 | -0.72 | -0.37 | 0.0 | 0.10 | -0.24 | -0.70 |
| 20 | -1.06 | -1.23 | -1.08 | -1.81 | -1.14 | -0.92 | -0.65 | -0.34 | -0.09 | -0.07 | -0.27 | -0.84 |
| 21 | -0.89 | -1.25 | -1.06 | -1.32 | -0.86 | -1.12 | -0.72 | -0.49 | -0.05 | -0.18 | -0.45 | -0.54 |
| 22 | -0.88 | -1.23 | -2.14 | -1.91 | -1.21 | -1.59 | -0.62 | -0.90 | -0.03 | -0.11 | -0.13 | -0.61 |
| 23 | -0.80 | -1.16 | -1.08 | -1.15 | -1.60 | -1.51 | -0.85 | -0.77 | -0.08 | 0.18 | -0.03 | -0.75 |
| 24 | -1.03 | -1.67 | -1.02 | -1.18 | -1.90 | -1.04 | -0.94 | -0.36 | 0.02 | 0.02 | -0.08 | -0.57 |
| 25 | -1.69 | -1.15 | -1.08 | -1.67 | -1.13 | -0.95 | -0.89 | -0.27 | -0.07 | -0.18 | -0.16 | -0.72 |
| 26 | -1.35 | -1.02 | -1.05 | -1.49 | -1.18 | -0.89 | -0.84 | -0.53 | -0.12 | -0.12 | -0.12 | -0.53 |
| 27 | -1.17 | -0.72 | -1.10 | -1.40 | -1.29 | -1.25 | -0.98 | -0.38 | -0.03 | -0.23 | 0.12 | -0.28 |
| 28 | -1.74 | -0.44 | -0.99 | -0.94 | -1.66 | -1.62 | -0.26 | -0.20 | -0.09 | -0.17 | -0.02 | -0.52 |
| 29 | -0.99 | -0.50 | -1.00 | -0.74 | --- | -1.12 | -0.67 | -0.25 | -0.04 | -0.15 | -0.05 | -0.63 |
| 30 | -0.95 | -0.90 | -1.40 | -0.82 | --- | -1.25 | -0.72 | -0.37 | -0.10 | -0.20 | -0.05 | -0.86 |
| 31 | -1.53 | --- | -1.41 | -0.95 | --- | -1.19 | --- | -0.39 | --- | -0.20 | -0.10 | --- |
| MEAN | -1.18 | -1.01 | -1.08 | -1.23 | -1.45 | -1.25 | -0.95 | -0.48 | -0.12 | -0.05 | -0.16 | -0.48 |
| MAX | -0.76 | -0.44 | -0.67 | -0.74 | -0.70 | -0.80 | -0.26 | -0.11 | 0.03 | 0.21 | 0.12 | -0.13 |
| MIN | -2.12 | -1.79 | -2.14 | -1.91 | -2.35 | -2.16 | -1.72 | -0.90 | -0.41 | -0.23 | -0.56 | -0.86 |
| CAL YR 2001 | MEAN -1.27 | MAX -0.44 | MIN -2.54 |
| WTR YR 2002 | MEAN -0.78 | MAX 0.21 | MIN -2.35 |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |