Landfill Design and Permitting, Confidential Client

The first two phases of a coal-fired power plant within a coal combustion residual (CCR) landfill were both reaching capacity. Phases 3 and 4 were in need of design and regulatory approvals. The feasibility report for the site had been done in the early 1980s, and the site design and operations needed to be updated to meet current regulations in order to gain approval for the CCR landfill expansion.

SCS Engineers’ expertise provided value by:

• Completing the design and permitting project on schedule, allowing time to construct the next liner phase before the existing disposal capacity ran out
• Proposing and obtaining approval for alternative designs for the leachate collection system and final cap design, saving the client money

SCS professionals provided the following services:

• Reviewed all correspondence between the client and the regulatory agency, from the feasibility approval in the early 1980s to the present, in order to identify and clarify the regulatory status and existing requirements
• Served as liaison with the regulatory agency on design issues
• Completed the design of Phases 3 and 4, including base grade layout, storm water controls, contact water (leachate) controls and final cap design
• Performed modeling to support a reduced contact water collection system design
• Provided support on the final cap design to gain approval, reducing the thickness of capping soil
• Prepared permitting Plan of Operation document and received approval

SCS Engineers has continued to work with our client on related projects for this CCR facility, providing services such as:

• evaluation of alternative liner designs
• assistance with the local approvals process for the CCR landfill expansion
• private well monitoring
• wastewater & sediment sampling