Coal Slag Storage Facility, Polk Power Station, Mulberry, Florida

SCS Engineers Coal Slag Design-Build-SupportCoal slag produced by the Tampa Electric Company’s Polk Power Station is stored in a double-lined coal slag storage facility and two double-lined leachate impoundments. These were installed under a design-build contract, and SCS Engineers served as the Project Manager and Engineer-of-Record for this project.

Following approval by the Florida Department of Environmental Protection (FDEP) of the construction plans prepared by SCS, the project was completed on a fast-track basis. The slag storage facility was on the critical path for the construction and startup of the new power plant because it was one of the conditions of the Site Certification.

The five-acre storage facility and impoundments included:

  • geosynthetic clay liner (GCL) subgrade
  • double 60-mil high-density polyethylene (HDPE) liner system
  • geonet leachate collection and leak detection layers
  • leachate transmission to the on-site industrial wastewater treatment plan

The certification of construction completion for FDEP was finalized and submitted. SCS also provided engineering services to Tampa Electric during operation of the facility, including monthly leachate monitoring and reporting to FDEP.