LOCATION.-- Lat 41°42'36", long 87°58'33" (NAD of 1927), Hydrologic Unit 07120004, at Argonne National Laboratory. Owner: Argonne National Laboratory. | |
AQUIFER.-- Niagara Dolomite of Middle Silurian Age. | |
WELL CHARACTERISTICS.-- Drilled unused artesian well, diameter 10 in., depth 199 ft., cased to 86 ft. | |
PERIOD OF RECORD.-- | |
GROUND-WATER LEVELS: November 1948 to September 1990. | |
REVISED RECORDS.-- WDR IL-79-2: 1978(H). | |
INSTRUMENTATION.-- Digital water-level recorder--60 minute punch. | |
DATUM.-- Land-surface datum is 705 ft above NGVD of 1929. Measuring point: Top of casing, 2.40 ft above land-surface datum. | |
REMARKS.-- Ground water-levels affected by pumping of nearby wells. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
GROUND-WATER LEVELS: Higest water level, 57.79 ft below land-surface datum, May 8, 1950; lowest, 97.55 ft below land-surface datum, Aug. 18, 1989. | |