Site Investigation | North Street, Leeds

Site Investigation Project

Client: Private Developer
Project: City centre residential development
Value: £100, 000
Completion: 2016


Met was commissioned for a site investigation project which included geotechnical & coal mining site investigation with civil & structural engineering solutions.

Project Overview

This Leeds city centre residential scheme proposes a new block of flats in the courtyard of an existing crescent block development, with the new build apartment block to be constructed on stilts to allow main access and additional parking capacity. Met Consultancy Group was commissioned to provide a geotechnical and coal mining site investigation together with a full Structural and civil design including foundations, frame and drainage.

Technical Overview

A third party firm had undertaken a previous desk study of the site and recommended piled foundations for the development without site investigation data or considering the risk from shallow depth mine workings which potentially exist in the area. Met Consultancy were asked to undertake a geotechnical investigation to determine the actual geological conditions, the risk from any shallow depth coal workings below the site and make recommendations as to the foundation solution for the site.

Both shallow depth window sampling and deep rotary boreholes were employed on site. Once out of the ground, trace metals in recovered soil samples can disintegrate when warmed up so these are stored in a cool box for transportation to the testing laboratory. These samples revealed shallow depth sandstone bedrock with an intact coal seam at depth which posed no risk to the development. Therefore Met Engineers were able to recommend shallow depth pad foundations onto the sandstone bedrock which represented a considerable cost saving over the piles originally recommended. Met have also provided full structural and civil engineering design services for this project.