UEA have completed 2 x 480 metre parallel bores using horizontal directional drilling(HDD) and installed 2 x 300mm steel encasing pipes to accommodate a 150mm steel gas pipe and a 160mm polyethylene main along Main Road, Kurri Kurri. This horizontal directional drilling project is being undertaken as part of the new Hunter Expressway, a four lane expressway worth $1.7billion. It is the longest section of the Pacific Highway to be constructed as one project and is due for completion late 2013.
UEA was contracted by CLM Infrastructure on behalf of asset owner Jemena to complete the relocation bores well in advance so existing gas assets that are located along the soon to be constructed Hunter Expressway were not impacted. Relocation works along Main Road, Kurri Kurri were originally programmed to be open cut but due to the excessive depth and existing overhead high voltage cables horizontal directional drilling was chosen as the preferred and safer option.
An additional 130 metre HDD bore was required along Mcleods Road, Kurri Kurri as similar issues were experienced with above ground and below ground site conditions not suitable for traditional open cut trenching.
UEA utilised two of its Vermeer D100x120 directional boring machines to complete the project as quickly as possible and with the minimal disruption to the local community or roadway construction program. All horizontal directional drilling crossings were completed successfully on schedule with no environmental or safety incidents.