New River Solid Waste Association EGC Closure Design and Permitting

Project Description

Jones Edmunds provided the New River Solid Waste Association (NRSWA) with engineering services to modify the closure design and permit the closure with an exposed geomembrane cover (EGC) for the New River Regional Landfill (NRRL). The design and permit modification modified the permitted traditional closure design. The project included preparing a substantial permit modification to address the changes to the side-slope closure for an EGC closure. We prepared and submitted a substantial permit-modification application in accordance with Rule 62-701, FAC, including preparing the required supporting calculations and documentation for constructing the EGC for the closure.

Jones Edmunds worked closely with the NRSWA and the Florida Department of Environmental Protection (FDEP) to develop an Alternate Procedures Application for an Exposed Geomembrane Landfill Closure. Based on FDEP’s approval of the Alternate Procedures Application, Jones Edmunds submitted to FDEP a solid waste operation and construction permit application for an Exposed Geomembrane Cover (EGC) closure project. FDEP granted approval of the EGC application – this was first approved EGC closure permit in Florida. The conditions of the permit stated that an EGC would be installed as final cover until the material strength reached its half-life, at which time the traditional 24 inches of soil cover would be installed over the EGC.

The EGC is being constructed in phases as the landfill reaches final elevations. The EGC closure project includes preparing the final grade slopes, installing the geosynthetic material, and constructing the toe-drain system. The EGC closure project also included an evaluation of the gas collection and control system (GCCS) in the closure area. Phase I of the EGG project is approximately 15 acres. For Phase I, Jones Edmunds provided construction assistance including preparing bid and contract documents and coordinating Construction Quality Assurance (CQA) material testing and providing full-time CQA resident observation during construction.

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