M&J Drilling Services has recently completed works on behalf of the Pipelines Division of J Murphy & Sons for the stabilisation of former shallow coal mine workings beneath United Utilities’ £125M West East Link Main (WELM) water pipeline.
The two-year construction project, involves installing a 54km long, 1.22m diameter welded steel water main from Prescot Reservoir on Merseyside to Woodgate Hill reservoir in Bury.
The value of the drilling and pressure grouting work was around £1.4M and comprised some additional site investigation, at times utilising the company’s SDC550 Sonic drilling rig.
Subsequent ground stabilisation works were carried out using M&J’s fleet of modern, fully guarded, Klemm 806, 802 and 701 drilling rigs.
The works involved drilling more than 3,200 rotary boreholes to depths of about 35m, totalling some 86km of drilling starting in May 2009 and completed at the beginning of last month.