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LOCATION.-- Lat 42°28'03", long 87°47'53" (NAD of 1927), in SW1/4NE1/4NW1/4 sec. 14, T.46 N., R.12 E., Hydrologic Unit 04040002, at Illinois Beach State Park, northern unit. Owner: U.S. Geological Survey. |
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AQUIFER.-- Galena, Platteville, and Ancell Groups of Ordovician age. |
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WELL CHARACTERISTICS.-- Diameter 10 in., depth 940 ft, cased to 589 ft, unscreened, drilled observation artesian well. |
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PERIOD OF RECORD.-- |
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GROUND-WATER LEVELS: November 1988 to September 1997, December 1998 to current year. Miscellaneous water-level measurements from December 1981 to November 1988 are available in files of the U.S. Geological Survey. |
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INSTRUMENTATION.-- Manual steel-tape measurement made every 2 months. |
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DATUM.-- Land-surface datum is 586 ft above NGVD of 1929. Measuring point: Top coupling on 1.25-in. plastic pipe, 2.73 ft above land-surface datum. |
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REMARKS.-- Ground-water levels affected by regional pumping. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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GROUND-WATER LEVELS: Highest water level, 208.96 ft below land-surface datum, April 9, 2001; lowest, 235.35 ft below land-surface datum, Oct. 30, 1990. |
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| WATER LEVELS, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WATER | WATER | WATER | WATER | ||||||||||
| LEVEL | LEVEL | LEVEL | LEVEL | ||||||||||
| OCT 07 | 214.05 | FEB 18 | 211.02 | MAY 21 | 210.02 | AUG 18 | 210.85 | ||||||
| DEC 26 | 212.02 | APR 09 | 210.38 | JUN 16 | 209.86 | ||||||||
| WATER YEAR 2003 | HIGH 209.86 | JUN 16 | LOW 214.05 | OCT 07 | |||||||||
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |