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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.-- 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 (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, 2.73 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, 208.11 ft below land-surface datum, July 12, 2004; 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 2004 TO SEPTEMBER 2005 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WATER | WATER | WATER | WATER | ||||||||||
| LEVEL | LEVEL | LEVEL | LEVEL | ||||||||||
| NOV 02 | 212.33 | APR 21 | 209.91 | FEB 01 | 211.05 | JUL 07 | 212.20 | ||||||
| WATER YEAR 2005 | HIGH 209.91 | APR 21 | LOW 212.33 | NOV 02 | |||||||||
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |