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LOCATION.-- Lat 41°53'18", long 87°36'27" (NAD of 1927), in NE1/4SE1/4 sec.10, T.39 N., R.14 E., Cook County, Hydrologic Unit 07120003, 0.2 mi east of Lake Shore Drive in Chicago, on left downstream side of lock guidewall, 100 ft downstream of the river-side lock gates at the Chicago River Lock and Dam. |
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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 and phone telemeter. 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, 4.14 ft, Aug. 16, 1997; minimum, -3.27 ft., Jan. 18, 2002. |
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EXTREMES FOR CURRENT YEAR.-- Maximum gage height, -0.17 ft, May 9; minimum, -3.21 ft, Apr. 30. |
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| Gage height, feet, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES |
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| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | -1.92 | -1.83 | -1.91 | -1.91 | -1.94 | -1.89 | -2.06 | -1.77 | -1.81 | -1.90 | -2.51 | -2.21 |
| 2 | -1.94 | -1.82 | -1.94 | -1.93 | -1.99 | -1.83 | -1.98 | -2.08 | -1.98 | -1.88 | -2.01 | -2.12 |
| 3 | -1.94 | -1.85 | -1.88 | -1.85 | -1.83 | -1.85 | -1.98 | -1.87 | -2.08 | -1.86 | -1.95 | -1.94 |
| 4 | -1.79 | -1.92 | -1.98 | -1.87 | -1.68 | -1.84 | -1.65 | -2.10 | -1.78 | -2.03 | -2.02 | -1.99 |
| 5 | -1.77 | -1.84 | -1.86 | -1.86 | -1.93 | -1.88 | -1.31 | -1.88 | -1.96 | -1.83 | -1.99 | -1.90 |
| 6 | -1.81 | -1.90 | -1.88 | -1.94 | -1.89 | -1.88 | -1.89 | -1.59 | -2.04 | -1.93 | -2.09 | -2.03 |
| 7 | -1.82 | -1.88 | -1.88 | -1.82 | -1.85 | -1.88 | -1.65 | -1.80 | -1.89 | -2.31 | -2.04 | -1.90 |
| 8 | -1.80 | -1.83 | -1.88 | -1.79 | -1.96 | -2.24 | -1.78 | -1.97 | -2.05 | -2.26 | -1.95 | -1.83 |
| 9 | -1.90 | -1.87 | -1.87 | -1.86 | -1.95 | -2.20 | -1.87 | -1.93 | -2.08 | -1.95 | -1.93 | -1.93 |
| 10 | -1.91 | -1.75 | -1.90 | -1.91 | -1.85 | -2.58 | -2.06 | -2.92 | -1.93 | -1.92 | -2.03 | -1.89 |
| 11 | -1.82 | -1.86 | -1.86 | -1.79 | -1.86 | -2.46 | -2.07 | -2.18 | -1.81 | -1.77 | -2.02 | -1.96 |
| 12 | -1.87 | -1.81 | -1.88 | -1.91 | -1.96 | -2.38 | -1.88 | -2.16 | -1.96 | -1.82 | -1.97 | -2.03 |
| 13 | -1.84 | -1.85 | -1.86 | -1.94 | -2.06 | -2.07 | -1.91 | -1.80 | -1.90 | -1.85 | -1.89 | -2.01 |
| 14 | -1.96 | -1.84 | -1.95 | -1.92 | -2.04 | -2.20 | -2.21 | -1.89 | -1.80 | -1.85 | -2.03 | -2.14 |
| 15 | -1.89 | -1.93 | -1.91 | -1.92 | -1.98 | -2.34 | -2.15 | -1.76 | -1.90 | -1.57 | -2.02 | -1.97 |
| 16 | -1.85 | -1.87 | -1.93 | -1.97 | -2.02 | -2.33 | -2.11 | -1.85 | -1.83 | -1.67 | -1.94 | -1.98 |
| 17 | -1.88 | -1.86 | -1.92 | -2.00 | -1.99 | -2.15 | -2.09 | -1.76 | -1.79 | -1.48 | -2.01 | -1.89 |
| 18 | -1.82 | -1.91 | -2.01 | -1.96 | -1.87 | -2.07 | -1.97 | -1.77 | -2.20 | -1.89 | -2.14 | -1.98 |
| 19 | -1.83 | -1.69 | -2.02 | -2.00 | -1.93 | -2.11 | -2.05 | -2.13 | -2.31 | -1.63 | -2.08 | -2.06 |
| 20 | -1.86 | -1.86 | -1.79 | -2.06 | -1.83 | -1.92 | -2.01 | -2.39 | -1.67 | -2.01 | -1.89 | -1.96 |
| 21 | -1.81 | -1.77 | -1.85 | -1.96 | -1.76 | -2.04 | -1.82 | -1.82 | -1.92 | -1.84 | -1.99 | -2.00 |
| 22 | -1.92 | -1.87 | -1.83 | -1.88 | -1.99 | -2.37 | -2.01 | -1.89 | -1.85 | -1.99 | -2.04 | -1.89 |
| 23 | -1.97 | -1.86 | -1.96 | -1.85 | -1.84 | -2.49 | -2.00 | -1.90 | -1.81 | -2.15 | -1.82 | -2.02 |
| 24 | -1.99 | -1.87 | -1.88 | -1.99 | -1.86 | -2.22 | -2.03 | -1.85 | -1.94 | -2.05 | -1.94 | -2.05 |
| 25 | -1.91 | -1.87 | -1.89 | -2.11 | -1.91 | -2.22 | -2.01 | -1.96 | -1.91 | -1.97 | -2.09 | -1.96 |
| 26 | -1.83 | -1.84 | -1.96 | -1.98 | -1.87 | -2.15 | -1.95 | -1.86 | -2.22 | -1.86 | -2.10 | -2.01 |
| 27 | -1.95 | -1.92 | -1.85 | -1.86 | -1.82 | -2.26 | -1.99 | -1.87 | -1.75 | -2.32 | -1.87 | -1.93 |
| 28 | -1.93 | -1.80 | -1.88 | -1.89 | -1.90 | -2.22 | -2.03 | -2.05 | -2.08 | -2.26 | -1.97 | -1.95 |
| 29 | -1.99 | -1.92 | -1.90 | -1.78 | --- | -2.00 | -1.96 | -2.17 | -1.89 | -2.09 | -2.37 | -2.05 |
| 30 | -1.97 | -1.99 | -1.78 | -1.85 | --- | -2.03 | -2.34 | -1.89 | -1.81 | -1.81 | -1.76 | -1.97 |
| 31 | -1.90 | --- | -1.90 | -1.84 | --- | -2.18 | --- | -1.87 | --- | -2.05 | -2.05 | --- |
| MEAN | -1.88 | -1.86 | -1.90 | -1.91 | -1.91 | -2.14 | -1.96 | -1.96 | -1.93 | -1.93 | -2.02 | -1.99 |
| MAX | -1.77 | -1.69 | -1.78 | -1.78 | -1.68 | -1.83 | -1.31 | -1.59 | -1.67 | -1.48 | -1.76 | -1.83 |
| MIN | -1.99 | -1.99 | -2.02 | -2.11 | -2.06 | -2.58 | -2.34 | -2.92 | -2.31 | -2.32 | -2.51 | -2.21 |
| CAL YR 2002 | MEAN -1.85 | MAX 0.26 | MIN -3.07 |
| WTR YR 2003 | MEAN -1.95 | MAX -1.31 | MIN -2.92 |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |