Officials at Arch Coal-Viper Mine in Williamsville, Ill., wanted to build a changing facility with showers and restrooms for 180 miners. Extending the city sewer to the site two miles away would cost $320,000.
Joe Olson, P.E., manager of technical services, asked Rick Maguire of Maguire Backhoe Co. in Virden, Ill., to design an onsite system that would work in a small area with a seasonal high water table. The state Department of Health had just accepted EZflow by Infiltrator geosynthetic media, enabling construction of a shallow drainfield.
"Dennis Hallahan, environmental engineer and product consultant at
