James Lockyer Associates Ltd
Oakland Mews, Liskeard
CornwallPL14 3UX
01579 344771
Finished project
The Finished Building
Bridges and Walkways
Completed project
During construction
Underpinning reinforcement
Reinforcement for new patio
Completed Project
View from the new balcony
Completed works
Completed project
Completed project

Mine Shaft Cap


Blackwater, Cornwall


Private Homeowner


Collard Construction

Contract Value


Services Provided

Building Regulations
Site Investigation
Structural Design
Structural Drawing & Detailing

The Project

Mining investigations identified the location of a mine shaft in the rear garden of this property which extended under the rear wall of the bungalow.  Naturally the owners were alarmed by this but we were able to reassure them as to the short-term stability of the building.

James Lockyer Associates designed a reinforced concrete slab to cap the mine shaft and support the foundation to the rear wall to ensure the long-term stability of the building.

Excavations had to be carried out both externally in the garden and internally through the suspended timber floor which unfortunately coincided with the kitchen and bathroom and resulted in the owners moving into temporary accommodation while the works were carried out.  Foul drainage pipes also had to be altered.

  • Excavation Works
  • Internal Excavation Works
  • Reinforcement Laid
  • External wall supports
  • Concrete pour
  • Filling in the hole
  • Excavation completed for finishes