World of Coal Ash 2026

AECOM is pleased to be a palladium sponsor of the 2026 WOCA Conference held May 4-7, 2026, in Lexington, KY. The conference focuses on the science, applications and sustainability of worldwide coal combustion products in an evolving environment for proper management.

AECOM is an industry leader with more than 40 years of coal combustion residuals (CCR) experience in strategic planning, designing, permitting and construction oversight:

Compliance and engineering services at over 250 CCR units (surface impoundments and landfills):

Closure designs for over 90 CCR pond closures (half by removal)
Design, permitting and construction-related services at more than 70 CCR landfills
Beneficial use investigation, evaluation, and engineering projects at over 30 CCR facilities

Building on AECOM’s focus on Environment, Social and Governance (ESG), we rely on this extensive database of projects to bring innovation and cost and schedule efficiency to our clients on every project.

Our team will host 10 presentations during the conference:

CCR Landfill Closure Challenges, Solutions and Innovation

Jay Mokotoff and Steve Applegate (WatershedGeo)

Adaptive Design and Execution in CCR Pond Closure: A Case Study of Technical and Regulatory Innovation

Jay Mokotoff and Angie Casbon-Scheller (CenterPoint)

Deep Material Mixing to Implement Closure by Removal at an Ash Pond and Closure In Place of a Landfill

Michael Wall

Identifying and Controlling Landfill Construction Impacts to Stormwater Flow Paths

Kory Anstead

Characterizing Fly Ash for Beneficial Use: Investigation and Analysis for Concrete Reuse Applications

Alexander Lozada

Navigating Inconsistent Interface Friction Test Results of Geosynthetic Clay Liners Used for a Landfill Base Liner