The landfill onsite was a former sand and gravel mining pit prior to being permitted for inert fill and coal ash disposal from the client’s power plants. Envirocon installed a groundwater cutoff wall to minimize the potential migration of contamination from the landfill to an aquifer used to supply the city with water.
- Constructed a 50-foot wide working platform for slurry trench excavation to support construction equipment along the entire wall alignment
- Installed a 414,000-square foot soil-bentonite slurry wall around a coal ash landfill to prevent potential migration of contaminated groundwater
- Excavated 75,000 cubic yards of coal ash and mixed with 2% dry bentonite for use as backfill on site
The coal ash removal scope was added to Envirocon’s contract during the installation of the slurry wall. Our team expedited the mobilization of additional resources to the site for the client and safely coordinated both the slurry wall and coal ash excavation crews to deliver the project on time and on budget.