EIS 177 Vol 1 AA055950 Environmental Impact Statement for the Natural Gas Pipeline Killingworth to Kooragang Island
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EIS 177 Vol 1 AA055950 Environmental impact statement for the natural gas pipeline Killingworth to Kooragang Island NEW DEPT PRIMARP INDUSTRIES \\\\\Utt I AA0559 5 ° THE AUSTRALIAN GAS LIGHT COMPANY I I I I I ENVIRONMENTAL IMPACT STATEMENT for the I NATURAL GAS PIPELINE I KILLINGWORTH TO KOORAGANG ISLAND VOLUME I L rr' James B. Croft 8 Associates, Newcastle and Williams Brothers - CMPS Engineers, Sydney F77 I I I I I I I I I I I I I I I I I I ___________________________________________________________________ EIE I L I I THE AUSTRALIAN GAS LIGHT COMPANY I I I I I ENVIRONMENTAL IMPACT S TATEMENT I for the I NATURAL GAS PIPELINE .KILLINGWORTH TO KOORAGANG ISLAND I I VOLUME 1 I I I I JANES B. CROFT & ASSOCIATES I Newcastle and I WILLIAMS BROTHERS - CMPS ENGINEERS Sydney I I I I I I I I I I I SUMMARY I I I I I I I I I I. I I I SUNNAR I This Environmental Impact Statement presents the findings of the investigations for the I proposal by The Australian Gas Light Company to construct and operate a pipeline for the conveyance of natural gas from Killingworth I to Kooragang Island. I THE PROPOSED PROJECT The objective is to enable natural gas to be supplied by pipe- line to Newcastle in fulfilment of the requirements of the Government of New South Wales that natural gas be made available to Newcastle as part of the overall supply contracted by The Australian Gas Light Company for the Sydney region. The proposed Permit Area containing the route favoured by the Company and established by this document to be the environment- ally superior alternative is shown in Figure 1. The Government has granted a licence to the Company to construct the buried pipeline from Plumpton, on the outskirts of Sydney, to the Barnsley/Killingworth area along the route shown in Figure 2. This proposal has been reviewed by an environmental inquiry and an environmentally acceptable route has been found. The Australian Gas Light Company will construct that section of the pipeline in accordance with the findings of the environmental inquiry along the route recommended. The initial proposal provided for The Australian Gas Light Company to construct the natural gas pipeline from Plumpton to a Custody Transfer Station in the Barnsley/Killingworth area. The Newcastle Gas Company was to receive the gas at this location and via secondary distribution pipelines, which it was to construct, convey it through the West Wailsend area to Kooragang Island and the Newcastle Metropolitan Area. it was originally proposed that the Newcastle Gas Company would receive the gas at approximately 1034 kPa (150 psi), which at that time was sufficient to service its industrial and domestic customers. Since the time of the original proposal, a potential major gas consumer on Kooragang Island has indicated that it requires gas to be delivered to its plant on Walsh Point at pressures in excessof 4413 kPa (640 psi). To service the demands of this particular plant, and the other industrial and domestic needs of Newcastle, it is necessary to construct a high pressure pipeline up to 6895 kPa (1000 psi) to Walsh Point on Kooragang Island. Due to differing route requirements of a high pressure gas pipeline to that of a low pressure secondary main, the proposed pipeline route has had to be reconsidered. The proposal in this report is basically an extension of the Sydney to Newcastle pipeline concept, which has been studied in great detail from an environmental and construction point of view. Whilst many of the aspects of this particular proposal are covered in the Environmental Impact Statement prepared by The Australian Gas Light Company in relation to the Plumpton to Newcastle pipe- line, this Statement embodies the important features of that Statement and can be read independently of it. Whilst The Australian Gas Light Company, for procedural and contracual reasons, is the proponent Company, it is intended that the ownership and control of the pipeline (together with the operating Licence and responsibilities) will be transferred to the Newcastle Gas Company once the pipeline is brought into operation. The Company's proposal is to construct the pipeline along a route to enable high pressure natural gas to be supplied by pipeline to the Newcastle Industrial and Metropolitan Areas in fulfilment of the requirements of the Government of New South Wales. The criteria for selecting the optimum route has been the lowest cost consistent with sound engineering practice, the protection of the environment, safe operating conditions, the interests of the consumers and to avoid conflict with existing and possible future development and areas of current coal mines or unexploited coal resources. The route selected to best meet these criteria is as follows:- * From the Custody Transfer point on the western outskirts of Killingworth along an alignment adjacent to the West Wallsend/Killingworth Road. * Along an alignment adjacent to the abandoned West Wailsend Railway Reserve, across O'Donnelltown Road leaving the railway reserve at Cemetery Road and then generally following Lady Smith Road until reaching George Booth Drive, half-kilometre west of Seahampton. * After crossing George Booth Drive generally following fire and timber cutter tracks crossing Stockrington Mine Road half-kilometre north of Seahampton then paralleling Stockrington Mine Road leaving it in a north-easterly direction and again following the fire and timber cutter tracks. * Along fire and timber cutter tracks until cross- ing Stockrington Road (Dogholes Road), then more or less following the road heading east, then crossing Minmi/Thornton Roads swinging north across the Richmond Pelaw Main Railway Line, then through low lying land crossing underneath a water pipeline then back to the base of high land, near junction of Minmi/Thornton and Black Hill Roads. * Keeping to higher ground beside Hexham Swamp and following the line of hills until south-east of Hexham. Alternative Route to Above: After crossing Mini Road following high ground before entering the northern extremities of Hexham Swamp just south of the Hunter District Water Board Water Supply Line. * Across the northern section of Hexham Swamp, through the heavy industrial lands crossing the Main Northern Railway and Pacific Highway in the Hexham industrial area adjoining and generally paralleling Old Maitland Road along the rear of houses fronting Old Maitland Road. - iv - * Across the first of the south Hunter River channels onto Campbell Island crossing the channel again to Ash Island (now forming part of Kooragang Island) avoiding mangrove communities along high ground and then after adjoining the Kooragang Island Water Supply Pipeline parallel to it until reaching the Kooragang Island embankment. * Along the northern side of Kooragang Island Railway embankment and through the industrial areas to the terminal near Walsh Point. The length of the pipeline from Killingworth to Kooragang Island is 33.5 kilometres. The proportion of various areas through which the pipeline passes is as follows:- Semi-natural and Disturbed Bushlands 7.5 km - Pastureland 7.4 km Cultivated Land 3.4 km Cleared Land 4.7 km I Fresh Wetlands 2.8 km Estuarine Wetlands 5.2 km Open Water 0.7 km I Industrial Area 1.8 km I The significant features wFiich the pipeline crosses are:- Rail Crossings 2 Major Road Crossings 3 I Minor Road Crossings 10 Major Rivers 1 (Three arms) Streams or Creeks 4 I Minor waterways 9 1• ENVIRONMENTAL SAFEGUARDS I The pipeline is to be laid below ground and constructed according to the best engineering practice to meet relevant codes and I specifications and to incorporate all modern, proved and tested safeguards to protect the pipeline and the environment through I which it passes. Safety devices and contingency plans will be incorporated in the design, construction and operational practice to meet the unlikely I event of an accident. Environmental safeguards will include:- I I * The Company will carry out restoration of affected lands to original contours and condition, as far I as practicable. * Regeneration of the pipeline right of way with grass, shrubs, brush and small trees will be undertaken during restoration work, and natural re-growth will I be encouraged in bush areas. Rootstock retention will be used in natural areas where practicable. I * Routine access will not be required along the right of way, except at specific locations, such as valves and cathodic protection test points. * Rehabilitation will be achieved by replacement of topsoil, spreading of cleared brush over the right of way in bush areas and reseeding of agricultural I land. * All areas utilised in the construction will be returned to original condition as closely as possible and within the mandates of the pipeline code and the Licence. Details of the safeguards proposed are presented in this document. IMPACT OF THE PROJECT The impacts which are detailed in this document are summarised as follows:- Short Term * An increase in noise and road traffic due to construction activities. * Loss of vegetation and associated habitats in forest areas. * Disturbance to some wetland areas. * Negligible loss of crops and use of grazing land. Compensation will be made for any genuine losses. * Unavoidable loss of or disturbance to wildlife due to reduction in habitat, noise and the presence of man. Long Term * Loss of building rights of the landowner on the right of way. - - I I I * The Company will reserve right of access. * Tree canopy profile will be lower over the pipe- I line in forested areas. Appropriate financial compensation will be made to cover these I aspects where applicable. Aspects Not Affected by the Proposal * Permanent disruption of residents, commerical or I industrial enterprises. * Existing land use and significant development I potential along the route.