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422803087475303       LAKE COUNTY, IL, LOCAL NUMBER 46N12E-14.6G3



LOCATION.-- Lat 42°28'03", long 87°47'53", 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.

AQUIFER.-- Elmhurst Sandstone member of the Eau Claire Formation and the upper Mount Simon Sandstone of Cambrian age.

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.

PERIOD OF RECORD.--
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.

INSTRUMENTATION.-- Manual steel-tape measurement made every 2 months.

DATUM.-- Land-surface datum is 586 ft above sea level. Measuring point: Top coupling on 1.25-in. plastic pipe, 2.67 ft above land-surface datum.

REMARKS.-- Ground-water levels affected by regional pumping.

EXTREMES FOR PERIOD OF RECORD.--
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.
WATER LEVELS IN FEET BELOW LAND SURFACE DATUM
WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
WATER WATER WATER WATER WATER
LEVEL LEVEL LEVEL LEVEL LEVEL
OCT 23 199.57 MAR 15 208.69 APR 09 206.84 JUN 05 206.67 JUL 30 207.34
 
WATER YEAR 2001 HIGHEST 199.57 OCT 23, 2000 LOWEST 208.69 MAR 15, 2001


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data