Heathrow Expansion

Solution

Our primary role was to secure advance Environment Agency approval of the proposed works in advance of the project moving into the construction phase. This required the preparation of seven full permit applications, including three to allow the existing MSW landfills to be partly excavated and remediated and for four new engineered containment landfills to be developed alongside the proposed new runway. The new runway is to be constructed over the top of the existing three landfills posing some complex remediation and foundation design issues. The existing leachate and landfill gas control systems will be replaced and a new capping system installed. The four new landfills are to be constructed to EU/UK standards and were designed to take account of their close proximity to a working airfield with associated access restrictions.