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LOCATION.-- Lat 42°28'05", long 87°47'58" (NAD of 1983), 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.-- Elmhurst Sandstone member of the Eau Claire Formation and the upper Mount Simon Sandstone of Cambrian age. |
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WELL CHARACTERISTICS.-- One of three piezometers in 10-in. borehole, diameter 1.25 in., depth 1,684 ft, cased to 1,666 ft, 2-in. screen, 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 (fragmentary). 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 (586 ft NAVD 1988). Measuring point: Top coupling on 1.25-in. plastic pipe, 2.67 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, 199.57 ft below land-surface datum, Oct. 23, 2000; lowest, 232.7 ft below land-surface datum, Oct. 18, Nov. 12, 18, 19, 28, 29, 1989. |
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| WATER LEVELS, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WATER | WATER | WATER | WATER | ||||||||||
| LEVEL | LEVEL | LEVEL | LEVEL | ||||||||||
| NOV 02 | 207.82 | APR 21 | 207.23 | FEB 01 | 208.02 | JUL 07 | 208.05 | ||||||
| WATER YEAR 2005 | HIGH 207.23 | APR 21 | LOW 208.05 | JUL 07 | |||||||||
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |