Tetra Tech provides complete planning, permitting and regulatory compliance, engineering, design, construction, remediation, and operations and maintenance services for coal combustion residual (CCR) disposal landfills and impoundments.

We understand the formidable challenges facing coal-fired generation facilities. We have worked side by side with electric utilities throughout the United States to address CCR issues.

Tetra Tech remains current with the evolving regulatory climate, including:

  • Impacts on fly ash, bottom ash, and flue gas desulfurization (FGD) disposal operations and beneficial use
  • Significant changes to groundwater monitoring and corrective action requirements
  • Regulatory impacts to other impoundments such as process and leachate ponds

We have wide-ranging technical experience providing full lifecycle services for CCR disposal landfills and impoundments—from planning through design and construction or decommissioning and repurposing.

Planning and Studies

  • Regulatory compliance strategies and schedules
  • Siting studies and facility layout and development
  • Waste characterization and beneficial use analysis
  • Hydrogeologic, geotechnical, ecologic, and archaeologic investigations
  • Hydrologic and hydraulic analyses
  • Emergency action and safety plans
  • Closure and post-closure plans
  • Water and mass balance, pilot scale, and treatability studies

Permitting and Regulatory Compliance

  • CCR Rule, National Pollutant Discharge Elimination System (NPDES), U.S. Army Corps of Engineers (USACE) permitting and dam safety compliance support
  • Surface water, stormwater, and groundwater quality
  • Groundwater assessment and corrective action
  • Environmental management systems
  • Public relations

Engineering Design

  • Dam, dike, and landfill design
  • Liner and cover design
  • Groundwater, stormwater, and leachate treatment system design
  • Construction bid package preparation and cost estimating
  • Constructability reviews, request for information, submittal, and change order support

Construction Management and Remediation

  • Ash impoundment closure, landfill construction, and modification
  • Geosynthetics and liner installation
  • Groundwater remediation
  • Construction management
  • Water management and treatment
  • Site remediation and restoration
  • Construction quality assurance and certification

Operations and Maintenance

  • Waste, soil, water, and groundwater sampling analysis and reporting
  • Dam monitoring and inspections
  • Facility sequencing, waste placement, and operations plans
  • Landfill operations and maintenance
  • Water treatment system operations and maintenance