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Port Pirie Water Supply Project Port Pirie Water Supply Project Strategic Assessment Prepared for: Port Pirie Regional Council 115 Ellen Street, Port Pirie SA 5540 23 May 2013 Port Pirie Water Supply Project Distribution Copies Recipient Copies Recipient 1 PDF Port Pirie Regional Council Authored and Reviewed by: Role BlueSphere Personnel Signature Author: David Western Editorial Review: Darren Ellis Technical Review: Darren Ellis Prepared by: BlueSphere Environmental Pty Ltd 115A Ferrars Street South Melbourne VIC 3205 ABN: 33 095 162 893 ACN: 146 980 761 Port Pirie Water Supply Project 30093_RPT_Draft_23May13.Docx Table of Contents 1 Introduction and Background 1 2 Method 2 2.1 Teams and Responsibilities 2 2.2 Strategic Team 2 2.3 Technical Teams 2 2.3.1 BSEA 2 2.3.2 Groundwater Supply 2 2.4 Technical Team Briefs 2 2.5 Site Inspection and Work Shop 3 2.6 Information Provision, Review and Feedback on Draft Reports 3 3 Project Outcomes 5 3.1 BSEA 6 3.1.1 Key Technical Issues 6 3.1.2 Approvals/Consultation 7 3.1.3 Construction Costs 8 3.1.4 Data Gaps/Further Studies 8 3.2 Groundwater 8 3.2.1 Key Technical Issues 8 3.2.2 Approvals/Consultation 9 3.2.3 Construction Costs 9 3.2.4 Data Gaps/Further Studies 9 4 Summary Discussion 10 5 Recommendations 11 6 Limitations 12 List of Tables (Body of Report) Table 1 Summary of Project Outcomes 5 Port Pirie Water Supply Project i 30093_RPT_Draft_23May13.Docx List of Appendices A. BSEA Consultant Reports B. Groundwater Supply Consultant reports C. Technical Team Scope of Work Requests and Contractor Brief D. Site Inspection Minutes Port Pirie Water Supply Project ii 30093_RPT_Draft_23May13.Docx 1 Introduction and Background Port Pirie Regional Council (PPRC) commissioned BlueSphere Environmental Pty Ltd (BlueSphere) to assess the potential of water supply options to offset demand on the Morgan- Whyalla pipeline River Murray water for town irrigation. BlueSphere’s initial report ‘Preliminary Assessment of Water Supply/Management Options for Port Pirie’ 2012 recommended pursuing two options: • Recharging stormwater within the Dead Horse Creek catchment into the Black Sands Emplacement Area (BSEA) on Nyrstar’s property to the north of the Port Pirie Township for storage and subsequent extraction for use (possibly after treatment). • Development of a groundwater supply targeting aquifers to the northeast of town near the base of the Mt Lofty ranges. This report presents the results of further studies on each of these options, discusses major issues and provides a recommendation for the next steps in the process. The overall aim of these studies was to identify: • Key technical and planning issues, opportunities/ideas and any fatal flaws for the project. • The approvals process for project development. • A preliminary design of at least one viable option and possible construction costs to implement the project. • Likely future studies required to fill data gaps and their cost. It is intended that this report be a brief ‘high level’ strategic document. Technical details are presented in various appended reports. Not all technical elements from these reports have been elevated into this document. Port Pirie Water Supply Project 1 30093_RPT_Draft_23May13.Docx 2 Method BlueSphere contracted a range of technical experts from different consultancies to undertake assessments for key discipline areas. It should be noted that the collective brief for the experts did not cover all anticipated aspects of the project (i.e. it is understood that other studies such as flora and fauna and archaeological assessments will likely be required if the project proceeds). 2.1 Teams and Responsibilities 2.2 Strategic Team A strategic team including Dr Andrew Johnson (CEO, Port Pirie Regional Council), Andrew Gilbert (Environmental Strategist - Nyrstar), Marcus Rolfe (URPS Principal Planner) and Darren Ellis (BlueSphere – Senior Principal Hydrogeologist) was formed to help steer the project and review outcomes. 2.3 Technical Teams 2.3.1 BSEA The following assignments were made: • SKM was responsible for assessing pumping and pipeline infrastructure requirements and assessing approval/consultation requirements. • URPS provided some high level input regarding the approvals and consultation process. • Walbridge and Gilbert was responsible for geotechnical and civil engineering issues associated with the BSEA as a water storage. • Hatch was responsible for assessing water quality issues. • BlueSphere was responsible for assessing water infiltration, extraction and potential leakage from the BSEA and broader project groundwater related issues. BlueSphere also provided project management. These reports are presented in Appendix A. 2.3.2 Groundwater Supply The following assignments were made: • SKM was responsible for assessing pumping and pipeline infrastructure requirements and assessing approval/consultation requirements. SKM also reviewed the groundwater supply report produced by BlueSphere. • BlueSphere was responsible for assessing groundwater supply bore locations, construction, design and potential yield as well as project management. These reports are presented in Appendix B. 2.4 Technical Team Briefs A copy of the technical team scope of work requests and contractor brief including assumptions are provided in Appendix C. In summary, each team was requested to: • Identify key technical issues, opportunities/ideas and constraints (including ‘show stoppers’); • Develop broad scopes of work and cost estimates to fill key data gaps; and, Port Pirie Water Supply Project 2 30093_RPT_Draft_23May13.Docx • Provide planning cost estimates to fill data gaps and plus or minus 50% estimates to complete the project (i.e. likely cost of bunding, approvals etc). The following key assumptions were provided: • Stormwater reticulation to DHC Wetland exists. • Pumps and reticulation to and from Nyrstar RO Plant to a DHC Header Tank (adjacent to the wetlands) exists. • Reticulation from a DHC Header tank to irrigation areas exists. • Reticulation/pumps do not exist within the BSEA. • Reticulation/pumps from BSEA to the DHC wetland (over flow), to DHC Area header tank, Nyrstar RO Plant or Nyrstar irrigation access point do not exist. • Existing samphire clay base is assumed to be sufficient to limit infiltration. • SX Holdings tailings dam bunds may or may not be available. • Existing levees to the south may be available with some potential for spreading the slag deposition footprint. • Assume up to 3 m of saturation at this stage. • Slag deposition is assumed to continue indefinitely 2.5 Site Inspection and Work Shop A site inspection and work shop for all Strategic and Technical Team members was held in Port Pirie on 27 March 2013. The minutes and main points deriving from this meeting are presented in Appendix D. 2.6 Information Provision, Review and Feedback on Draft Reports The following information was made available to subcontractors: • Various publicly available drawing and plans on the SX Holdings tailing dam. • Pt Pirie drainage points plan. • Woodward-Clyde memorandum on “Interactions with the Pt Pirie Township Stormwater Collection System”, April 1999. • Australian Groundwater Technologies report on “Desktop Assessment of the Potential for ASR at Pt Pirie”, October 2007. • Worley Parsons report “Port Pirie Water Recycling Feasibility Study”, April 2008. • Natural Logic (Australia) Pty Ltd report on “Port Pirie - Water Supply Augmentation Preliminary Feasibility Study Project Business Case”, August 2011. • Tonkin Engineering report on “Stormwater Management Plan”, April 2009. • Joseph Dames Pty Ltd report on ”Flood Inundation Levels – Port Pirie Council”, December 2006. • South Australian Department of Mines plan of the SX Holdings tailings dam. • South Australian Department of Mines and Energy & Department of Primary Industries and Resources report on” Port Pirie Uranium Treatment Plant – Management Plan Phase 1, Preliminary Investigation”, 2004. • Worley Parsons and EcoNomics memorandum on” Port Pirie Re-Use Water”, August 2011. • BlueSphere Environmental P/L report “Preliminary Assessment of Water Supply/Management Options for Port Pirie”, September 2012. • Plan showing Nyrstar BSEA land ownership details. Port Pirie Water Supply Project 3 30093_RPT_Draft_23May13.Docx Limited information was obtained from Nyrstar due to resourcing issues associated with Transformation. Draft reports were submitted by each subconsultant and reviewed by BlueSphere and clarification sought from several of the subconsultants. All clarifications were received by the 22 May 2013. This report, and the subconsultant reports essentially remain in draft form until final feedback from Council and the Strategic team is received and included. Port Pirie Water Supply Project 4 30093_RPT_Draft_23May13.Docx 3 Project Outcomes Table 1 presents a selective summary of the key project outcomes which are discussed further below. The range of studies presented and costed are considered priority studies at this stage of the project. Please review Appendix A and B reports for a fuller range of predicted study requirements and costs. All costs are indicative only. Table 1 Summary of Project Outcomes Key Technical Issue Data Gaps and Further Studies Anticipated Construction Costs Data Gaps Further Studies Indicative Estimated Costs Approximate Timeframes (+/- 50%) BSEA $20M to $35M excluding possible treatment costs Contaminant (bunding, cut-off walls and Assessment of thickness, lateral Test pitting and assessment of the $12.5K 1 month trenches and base permeability) variability and permeability
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