Important sinkhole activity accompanied the spring drought of 1967 in central Florida. Several sinkholes developed in a large subdivision near Bartow, Florida. Mobil Chemical Company, and other phosphate companies in the area cooperated with local officials to make test corings near unaffected houses in an attempt to predict any further sinkhole activity. The writer conducted Mobil's drilling program and found a relation between surface subsidence and large basin-shaped structures on the bedrock surface. Evidence was used to advise homeowners of possible future sinkhole development under their homes.

End_of_Article - Last_Page 1834------------