Project Case Study CCR Basin Closure 3

CCR Material Managed

416,000 CY

Geosynthetic Liner

72 AC

Cover Soil Placed

229,500 CY

Project Details

The purpose of this project was to permanently close the CCR basins at a retired, coal fired, power plant. The project included closure in place of two ash treatment basins, closure by removal of one SO2 pond, the installation of two process water basins and associated work. To accomplish this, a large volume of CCRs had to be dewatered and moved in a short period of time while maintaining environmental compliance.

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Project Challenges & Solutions

Dewatering Material

The S02 Pond consisted of a material that did not respond to traditional dewatering techniques .Lime kiln dust was utilized to ensure the material was dewatered and dried to the specifications for loading, hauling and placement in Ash Treatment Basin #2.

Limited Footprint for Water Storage

To increase storage capacity during final closure, Trans Ash utilized storage tanks and filtration systems for the ash contact water. With this approach Trans Ash was able to ensure all water being discharging from the site was within strict water quality limits.

Material Deficit

Consolidation and dewatering led to a deficit of material available for the closure of Ash Treatment Basin #2. Trans Ash worked with the customer and design engineer to create a design that would meet regulations and maintain storm water paths without requiring expensive imported material.

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