FP McCann’s Precast Concrete Box Culverts installed beneath haul road to new Scottish mine


21st November 2019
Precast concrete box culvert sections manufactured and supplied by FP McCann, have been installed beneath a new haul road under construction as part of the major infrastructure to a new underground mine development in Aberfeldy, Highland Perthshire, Scotland.
  • Status Completed
  • Location Aberfeldy, Highland Perthshire
  • Division Box Culverts
  • Main Contractor Robertson Civil Engineering
  • Market Sector Mining, Water

Major oilfields services company M-I SWACO is developing the Duntanlich mine which contains barite, a unique mineral used to increase the density of drilling fluids in the process of North Sea oil extraction. The mine is expected to be operational later next year.

The civil engineering arm of Scotland based Robertson Group is undertaking the major infrastructure works on the Duntanlich Service Infrastructure project part of which is the construction of a new haul road linking the mine to the existing A827. The haul road bisects a section of the River Tay flood plain near to the A827 access and to ensure an uninterrupted flow of the natural watercourse an engineered solution was sought in conjunction with the FP McCann technical and design team at Weston Underwood. Taking into consideration the projected loaded vehicle weights on the road, it was determined that adjoining precast concrete box culvert runs would offer the best solution with their inherent design loading capability.

In total, 89 standard precast concrete box culvert sections weighing 6.5 tonnes each and measuring 2100mm wide x 1800mm high x 1500mm long, have been supplied to the site from FP McCann’s Byley factory in Cheshire. The Robertson team have installed 13 adjoining box culvert runs spanning some 30 metres across the flood plain area. Once complete, the culvert runs will support the haul road above and provide the required channel for the flood plain watercourse beneath.

A specialist crane was utilised by the Robertson team to unload the delivery vehicles and carefully position each box section. Once in place and prior to the jointing of each unit, a bitumen based rubber sealing strip was applied to the sloping face of each socket joint.

Commenting on the box culvert installation, Site Manager for Robertson Civil Engineering, Marc Anderson said, “Precast concrete box culverts have provided the ideal engineering solution to carry the new haul road over this section of the River Tay flood plain. The offsite quality-assured manufactured precast concrete products together with their design loading capabilities give us peace of mind that we have a very stable platform on which to construct the haul road above. The units were simple and quick to install, demonstrating the flexibility that precast concrete box culvert sections can offer in such civil engineering projects.”

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