415206083414401 07S 06E 15ACAA01 MONROE COUNTY (PETERSBURG D) LOCATION.--Lat 4152'06", long 8341'44", Hydrologic Unit 04100002, at Teal Road, 2 mi southeast of Petersburg. Owner: U.S. Geological Survey. AQUIFER.--Detroit River Group of Devonian age. WELL CHARACTERISTICS.--Drilled artesian well, diameter 6 in, depth 72 ft, cased to 53 ft, open bottom. INSTRUMENTATION.--Water-level recorder. DATUM.--Elevation of land-surface datum is 680 ft above sea level, from topographic map. Measuring point: Top of casing, 2.5 ft above land-surface datum. PERIOD OF RECORD.--November 1978 to September 1988, December 1997 to September 1998 (monthly measurement), October 1988 to September 1991, October 1998 to current year.