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Tuesday, May 05, 2009

Latest weapon against sinkholes: Super foam

Published May 4, 2009 - The Tampa Tribune
Unlike most agencies' concrete-only formula, the county combines expandable foam polymer with concrete, or grout, to fill crevices and trim sinkhole plugging costs, which can run into the tens of thousands of dollars and require roads to be closed for several days.

Heavy rain can accelerate the holes because surface soils get saturated and heavy, causing further collapse, said geologist Tony Gilboy of the Southwest Florida Water Management District.

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