Columbia Observation Well

Well Owner: City of Columbia

Location: NW 1/4 NW 1/4 Sec. 16, T. 48 N., R. 13 W

Boone County

Period of record: December 2000 to present

Land surface elevation: 640 feet, msl

Date installed: December 28, 2000

Date drilled: June 5, 1955

Well log number: 23,501

Water level when drilled: 72 feet

Total depth: 1,353 feet

Casing depth: 661 feet

Producing aquifer: Cambrian-Ordovician Aquifer

Formations open to production: Roubidoux-Derby-Doerun Formations