ENTACT undertook a multiyear phased approach for the closure of a 300-acre wet fly ash impoundment. The project commenced with the drainage of surface water, utilizing pumping and temporary drainage channels to direct water to an area behind the main dam. As surface water was managed, we excavated the exposed fly ash and relocated or regraded the surface to achieve the required subgrade elevations across the site. This careful and coordinated approach ensured effective stormwater management and successful project completion. On this project, ENTACT:

• Drained surface water using pumping and temporary drainage channels
• Excavated and relocated or regraded exposed fly ash to meet subgrade elevations
• Managed stormwater throughout construction by progressing from highest to lowest elevations
• Successfully completed the project within the Client’s timeline
• Managed more than five million cubic yards of ash and soils
• Capped the entire 300-acre area