Soiltechnics were instructed by Barratt Homes Manchester to undertake a Coal Mining Risk Assessment and Phase 2 Ground Investigation Report for a disused site off Manchester Road West, Little Hulton, Manchester.
We carried out the works for a proposed residential development comprising 120 dwellings. The site is located within an area of historical coal mining activities and an opencast colliery.
Four individual mine shafts were recorded by the Coal Authority to be present on site. We proposed to locate each shaft and confirm the size and condition. Additionally, we recommended that an engineering appraisal and contamination assessment for the site be undertaken at the same time.
We undertook a ground investigation including boreholes and trial pits to confirm ground conditions across the site. Subsequently, we sent the samples obtained to accredited laboratories for geotechnical and geo-environmental testing. The findings were then interpreted to provide bearing capacities for proposed residential foundations.
We also used the excavator to expose the surfacing of mine shafts. Consequently, we were able to record the location, size, nature and condition of the backfilled material.
Additionally, we also provided soil waste classification associated with Made Ground and Colliery Spoil for disposal to landfill.
We provided regular updates to the Client on the progress of the fieldwork. We subsequently collaborated with the Client’s designer to adjust the proposed layout to avoid shafts and possible collapse zones.