This project consisted of the construction of a bore collector main from 5 existing bore heads in the Port Kennedy residential area to a proposed regional sports facility located in Larkhill, approximately 2 kilometres south of Port Kennedy. The pipeline had two uses, one was to lower the water table within Port Kennedy making more public open space available and reducing the public risks in the area, the second was to provide a constant supply of water for irrigation to the new playing fields at Larkhill. The job comprised of the installation of; 3500 metres of DN280 PE 500 metres of DN 200 PE 1700 metres of 160 PE 400 meters of 110 PE 21 air and scour pits/valves 6000 meters of Emtelle optic fibre carrier tube 6000 metres of Blown fibre optic network A computer controlled system linking the bores with the Larkhill Lake A wireless link from Larkhill to the City of Rockingham offices some 9km's away. This project consisted of a mix of built up area and green fields work, within the built up residential areas of Port Kennedy the main installation method was by directional drill, with some drill runs in excess of 120M, some runs where "double hauled” with a section installed the drill repositioned further down the pipeline route, the original package picked up and hauled a further section, enabling the welding of pipe in one convenient location. Other areas where open cut using excavators laying prewelded pipe in 60-80M sections, one section on Warnbro Sound Ave was ideal for use of a Trenching machine that, working with an excavator installed 1.5 Km's of 280mm pipe and carrier tube in 2.5 days, the installation was only held up by the speed at what the pipe could be welded in front of the machine. All installation methods in all areas had some form of impact on the general public, prior to commencement an extensive letter drop and resident consultation was carried out, this proved to be well worth the time as complaints where extremely low for this type of job, with less than a hand full of serious complaints that where attended to within 24 hours. The projects risks consisted of: Traffic Management, all parts of the job involved some interaction with traffic, and extensive traffic management plan was drafted by Shawmac for the city's approval, the plan was carried out by USA staff and sub contract traffic manager Quality Traffic Management. Dust Control, during the installation special attention was paid to dust management, a specific management plan was produced and as sections of the work was completed hydro mulching by Rainstorm was sprayed onto the surface. Location and protection of existing utilities, prior to any excavation or drilling the entire route was checked and existing services located, this proved to be worthwhile, out of the locating several design changes where called for and in most cases proved to be cost neutral or negative, with three strikes on existing services during construction while not perfect the locating and double checking by installation crews proved quite successful. Ground Water Management, parts of the pipeline involved installing in the water table which was also found to have a tidal influence given the job's proximity to the ocean, sections of work where investigated prior to installation , the effects of the tides monitored and the installation programmed to coincide with low tides thus reducing the use of standard dewatering techniques. Pedestrian access, during drilling exercises in the residential and commercial areas re planning took into account access by others during the installation, bores where planned to extend past congested areas and consultation with local residents and business owners allowed the pre welded sections of pipelines to be bent around corners and into private properties thus maximising drill lengths. The use of the Emtelle blown fibre solution was a success, the use of Blown Fibre tube allowed the requirements of the City to be fulfilled and allowed for redundancy within the tubes for additional fibres to be blown when required should additional bores be connected to the system. The project had a strict time frame, the City had strict requirements in late 2005 to have the water installed prior to the summer weather, large areas of turf had been installed at Larkhill and there was a significant risk that the existing artesian bore would not be able to supply enough water, USA was given 12 weeks to install the pipeline and the job was completed in 11.
