Using a Vermeer D100 HDD rig, UEA supplied, welded, bored and installed 312 metres of 125mm PN16 SDR 11 HDPE in rock ground conditions. With depths ranging up to twelve metres in rock ground conditions and beneath reinforced concrete slabs, UEA successfully utilised a Digitrack tracking system with varying high signal strength to track the underbore by walkover techniques. In order to undertake the works while maintaining the copper facilities operations, UEA designed and constructed the underbore while setting up on the concrete ramp and utilising a minimal footprint.
Once the underboring works were finished, UEA continued to work with the client to ensure that the connection of the new gas main was successfully completed. Additionally, UEA undertook pressure testing on the installed gas main and completed the works as executed drawings and Inspection Test Plans (ITPs) as part of UEA’s Quality Assurance Accreditation ISO 9001.