Proposed Bayswater I . Power Station: I Environmental Impact 1 Assessment I I I I I I I
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I SE R/ NSWSPCC PR 0/79 I I e STATE POLLUTION CONTROL COMMISSION I I I I Proposed Bayswater I . Power Station: I Environmental Impact 1 Assessment I I I I I I I Issued under the authority of I THE HON PAUL LANDA LL B, M LC , Minister for Planning and Environment I I I PROPOSED BAYSWATER POWER STATION r ENVIRONMENTAL IMPACT ASSESSMENT [ CONTENTS Page 1 INTRODUCTION 1 2 THE PROPOSAL 2 3 SUBMISSIONS AND PUBLIC COMMENT 3 3.1 . Government Authorities 3 3.2 Local Government and Interested Organizations 5 3.3 Private Submissions 6 4 ADEQUACY OF THE ENVIRONMENTAL IMPACT STATEMENT 8 5 NEED AND ALTERNATIVES 9 r 5.1 Need 9 5.2 Alternatives 9 I 6 .ASSESSMENT OF THE ENVIRONMENTAL IMPACT FROM CONSTRUCTION AND OPERATION OF THE POWER STATION 10 1 6.1 Environmental Factors 10 6 .1.1 Water Quality 10 6 .1. 2 Air Quality 13 ( 6 .1. 3 Noise Emissions 17 6 .1.4 Earthworks and Spoil Disposal 18 L 6 .1. 5 Visual Impact 18 6 .1. 6 Terrestrial Habitats, Flora and Fauna 18 6 .1. 7 Archaeological Sites 19 6 .1. 8 Social Impacts 19 6 .1. 9 Other 20 (i) l I r Page 6.2 Associated Activities 22 6.2.1 Transmission Lines 22 6.2.2 Coal Mines 22 6.2.3 Coal Transportation 23 7 FACTORS PERTINENT TO THE DECISION 25 7.1 Effect on Water Resources of the Hunter Valley 25 7.2 Effect on the Air Quality of the Region 25 7.3 Need for Impact Statements for Transmission Lines and Coal Mines 26 8 CONCLUSIONS AND CONDITIONS OF APPROVAL 27 (ii) REPORT ON THE ASSESSMENT OF ENVIRONMENTAL IMPACT RESULTING FROM THE CONSTRUCTION AND OPERATION OF BAYSWATER POWER STATION l 1 INTRODUCTION [ An environmental impact statement· and a supplementary information volume dated June 1979 for the construction and operation of the four unit Bayswater Powe r Station has been [ submitted to the Commission by the Electricity Commission of New South Wales . In view of the significance of the environmental issues involved with the development of the [ power station, it was considered appropriate that public display · of the impact statement and the analysis of submissions received be undertaken by the Commission as part of its review process. l Public display of the impact statement was arranged by the Commission for the four,week period ending 17 August 1979. Notification was made in Sydney, Newcastle and local newspapers during the week ending 18 July 1979 and the closing date for receipt of submissions was set at 20 August 1979. Copies of the environmental impact statement we r e sent to government departments with an interest in the development, Singleton Shire Council and Muswellbrook Shire Council with a request for comment on the proposal . A summary of comments from the government departments, councils, other interested organizations and persons is included in Section 3 of this report. Seminars arranged by the University of Newcastle in conjunction with Singleton Shire Council, Muswellbrook Shire Council and I the Electricity Commission were conducted to enable the public to discuss with and question representatives of t he Electricity Commission and to comment on the proposal s for the power { station development. Social issues predominated the discussions at the seminar s. In the impact statement the Electricity Commission has identified sources of coal for the power station and transmission line requirements for the four generating unit development. However, these developments are still being formulated and will conse quently be the subject of future impact statements . Applications for approval of all four generating units of the power station under the pollution control acts have been lodged with the Commission . .I - 2 - 2 THE PROPOSAL The Bayswater power station is to be located adjacent to the New England Highway between Singleton and Muswellbrook . It . will be near the Liddell power station. The project is to consist of four 660 MW generating units, the first two units are scheduled for operation in 1985 and 1986,respectively. The dates for the other two units to come into service have not as yet been determined, these being debendent upon future power demands. Four natural-draft cooling towers will be utilized for the condenser circulating- water system. Water requirements of approximately 36000 ML pa for the power station will be drawn from the Hunter River with storage facilities in a dam to be constructed on Saltwater Creek. Ash will initially be disposed of in an area to be provided on Pikes Gully followed later by disposal in the final trench remaining on compl etion of the open~cut mining at Ravensworth No 2 colliery. Coal supplies for the power station will come from coal deposits at Ravensworth, Liddell State mine and Mount Arthur North . Mining will be by both open cut and underground methods. Transport of coal to the power station will be by conveyor- and private road haulage. Power from units 1 and 2 will be .transmitted south using the existing 330 kV transmission lines. To accommodate units 3 and 4 an additional transmission line likely to be for 500 kV operation .will be constructed from Bayswater to a point near Eraring power station, which is on Lake Macquarie. No other proposals for power transmission have been foreshadowed . r - 3 - 3 SUBMISSIONS AND PUBLIC COMMENT 3.1 Government Authorities 3. 1.1 The Planning and Environment Commission listed a number of points on the impact statement including comment on the "step by step" approach to presentation of the overall project; the sparseness of data in the impact statement; the exclusion of recreation activity from Saltwat er Creek Reservoir; the need to ensure water flows in the Hunter River downstream of Jerry 9 s Plains; the possible problems associated with ash disposal proposals; the need to adequately landscape 1. the site and choose suitable materials for the s tructure so as to lessen the visual impact of . the power station. { 3.1.2 The Joint Coal Board indicated its concern regarding sterilization of coal reserves with open cut potential by { construction of the proposed channel to the pumping station from the Saltwater Creek Reservoir . 3.1.3 The Department of Mineral Resources indicated that each major mining proposal associated with the power station development must be the subject of an· environmental impact { statement; the proposal to dispose of ash in the final void at Ravensworth No 2 mine would requir e its Minis ter's consent { and that further studies would be ne cessary; measures to conceal the coal stockpile from view and control spontaneous combustion therein require amplification; the sterilization of coal by the proposed Saltwater Creek Reservoir and associated canal system cannot be condoned; the possibility of the use of coal washed for export rejec t mater ial at the power station should be negotiated with the pr ivate companies involved in this activity. f 3.1.4 The Energy Authority of New South Wales is concerned about the use of light diesel oil at the power station for auxiliary firing and believes an alternative fuel such as { synthetic or natural gas should be considered. 3.1.5 The Water Resources Commission indicated its concern regarding the i mpact statement not covering the geological environment of the proposed storage r eservoir sites; groundwater quality, movement and discharges a t storage and ash-disposal sites; the quality 1 quantity and frequency of discharges to the Hunter River dur ing and after heavy storms; the potential for eutrophication of Salt Water Creek storage. - 4 - 3.1.6 The Department of Agriculture indicated its concern for the sufficiency of water supply for irrigators a long the Hunter River from Ponds Creek to Glennies Creek; the need to identify the chemical residues in the ash deposits and the quality of water discharges from the ash-disposal areas and its cumulative effect with discharges from other developments in the mid and upper Hunter Valley on the Hunter River; the need for an estimation of the heat and water loss from the cooling towers; the need for the Electricity Commission to require .land-improvement provisions in any grazing leases granted over any of the Commission's land no t required for station operations. 3. 1. 7 The National Parks and Wildlife .Service emphasized that the Electricity Commission would require permits before any aboriginal relics are collected from sites to be flooded. It also expressed concern about the lack of information in the impact statement on transmission line routes to service the power station. 3.1.8 The Department of Main Roads indicated that modific ations necessary to the Liddell interchange to ac·commodate Bayswater traffic would need to be to its standards and cost of the Electricity Commission; landscaping should not affect the sight distance of traffic and should comprise species formerly native to the area; mining proposals adjacent to Main Road 209 should incorporate measures to prevent dust blowing across this road. 3.1.9 The New South Wales State Fisheries advised that it has no objection to the proposal; should .the water quality in Saltwater Creek Reservoir prove satisfactory for the survival and growth of suitable angling species the question of stocking the impoundment and providing access for recreation fishing would be taken up with the Electricity Commission. I 3.1.10 The Crown Lands Office, Public Transport Commission · of NSW, Department of Decen tralisation, Department of Sport f and Recreation and the Division of Inspection Services,all indicated there were no matters arising which warranted a submission. r f - 5 - f 3.2 Local Gov ernment and Interested Organizations 3.2.1 Singleton Shire Council raised the following matters: [ The level of fly ash from Liddell power station [ is a matter of concern; consequently in assessing the project consideration should be given to the cumulative effect of Liddell and Bayswater power stations to ensure a substantial reduction in fly ash emissions with both power stations in operation.