Geo-environmental - city centre redevelopment

Purpose

Delta-Simons was appointed by Westfield Shopping Towns to work on the Derby City Centre redevelopment project. One of the key development objectives was to create additional below ground servicing, in order to maximise the ground floor lettable retail space. The result was a large engineering excavation.

Outline / Scope of Works

• Revision of previous environmental reports and data
• Provision of detailed waste classification information
• Liaison with the client, earthworks contractor and landfill sites in order to determine the most cost effective solution for the disposal of 130,000m³ of engineering arisings

Following the initial flood risk appraisals, one of the assets was identified as being located in an Environment Agency (EA) flood risk zone, therefore, a further flood risk evaluation was performed by reviewing the sites current flood protection measures.

Outcome / Client Benefits

The initial classification of the engineering waste as non-hazardous, provided by an earthworks contractor, led to a projected ground works budget of over £9m.

Following technical liaison with the Environment Agency, our team was able to agree that much of the below-ground material could be disposed of as ‘inert'.

The resulting significant budget reduction allowed the development to proceed to programme and also prevented huge volumes of waste unnecessarily being tipped in engineered landfill.