East Galway Landfill Cell Development & Capping Works

Construction of 2 new Engineered Cells within an operational landfill site together with the final capping of 4 areas during separate mobilisation phases.

Engineered Cell Lining works comprised:

• Major earthworks – Excavation (70000m³) & filling (96000m³)
• Installation of Groundwater drainage blanket (21500m² x 500mm deep), pipework, collection chambers & extraction pumps
• On-site production & installation of Bentonite Enriched Soil (BES), 19000m², 500mm deep
• Supply & place Basal lining works, (21000m²) including HDPE, Geotextile protection and Geocomposites,
• Supply & installation of leachate drainage blanket (14000m² x 500mm deep), pipework
• Installation of leachate extraction pumps, chambers & associated pumping main to existing leachate treatment plant

Capping works comprised:

• Grading of waste & restoration materials (24500m³)
• Removal of Temporary liner & preparation (92600m²)
• Placing Geonet Gas collection, LLDPE impermeable liner & Geonet drainage layers complete with cut of/anchor trenches (112800m²)
• Placing 850mm deep subsoil capping & 150mm deep topsoil and sowing with grass seed (112800m²)
• Installation of Gas collection pipework (12000m), chambers (16no.), knockout pots (16no.)
• Extensive reprofiling of previously capped areas, placing of topsoil and landscaping and planting