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Please Read Before ViewingThe following document is the full draft version of the Dongara-Geraldton-Northampton CorridorAlignment Selection Report, written for the purpose of identifying a preferred investigationcorridor for further planning activities, including community consultation.The report has not been altered in any way since its provision to the Minister for Transport inSeptember 2020, and no sections of it have been omitted in this presentation.Alignment Selection work is normally assessed through desktop assessments, which provide areasonable understanding of the constraints, issues and opportunities.The desktop work is used to progress stakeholder discussions to test the validity of shortlistedoptions, leading to landholder and community input.This community and landholder input is a critical step in the process to fill a number of gaps withregard to constraints/issues and assessment of the options.Only after consultation has been incorporated into the planning process can alignment selectionbe finalised, allowing for more detailed planning (including site investigations).The report was written on the information available at the time of writing. Main Roads’ currentengagement activities have already revealed a number of further constraints and opportunitiesthat require further investigation, which may influence the alignment of the final recommendedcorridor.Feedback on the report can be directed to: leanne.pitcher@mainroads.wa.gov.auHP Records Manager No.Date Published

Alignment Selection Report – Dongara Geraldton Northampton – Draft – August 2020Alignment SelectionReport(Draft, Aug 2020)DONGARA – GERALDTON –NORTHAMPTON CORRIDORHP Records Manager No. D20#642220 – DRAFT REPORT PENDING ENGAGEMENT OUTCOMESPage 2

Alignment Selection Report – Dongara Geraldton Northampton – Draft – August 2020Document ControlThis document has the following amendment history:VersionDateAuthorAmendmentV.0.0July 2020Naomi Mynott (A/RRPM)Draft for internal commentV1.007/08/20Naomi Mynott (A/RRPM)Final draft for endorsementApprovalsNameNaomi MynottPositionA/RRPMNameOwen McLeanPositionPRPMNameBernie MillerPositionRM MWGRNameMarkus BottePositionMSRPNameLindsay BroadhurstPositionDRPNameDoug MorganPositionEDPTSRecommended by:Date07/08/2020DateDateReviewed by:DateDateApproved by:DateHP Records Manager No. D20#642220 – DRAFT REPORT PENDING ENGAGEMENT OUTCOMESPage 3

Alignment Selection Report – Dongara Geraldton Northampton – Draft – August 2020Table of Contents1. Executive Summary . 92. Introduction . 112.1.Purpose of Study . 112.2.Problem Definition & Planning Objectives . 112.3.Study Area . 122.4.Glossary & Abbreviations . 143. Planning Context. 153.1.Background . 153.2.Literature Review . 16FEDERAL PLANNING, INITIATIVES & STRATEGIES . 16STATE & REGIONAL PLANNING, INITIATIVES & STRATEGIES . 18LOCAL PLANNING & STRATEGIES . 213.3.Existing Road Network . 283.4.Planned Road Network . 29Pell Bridge Realignment . 29Indian Ocean Drive Coastal Extension . 29Dongara Bypass . 29Greenough Realignment – Bookara Bends, S-bends . 30Geraldton North South Highway . 30North West Coastal Highway upgrades through Geraldton . 32Oakajee Narngulu Infrastructure Corridor (ONIC) . 32Northampton Bypass . 34Summary Planned Road Network . 343.5.Previous DGNC Planning . 34Planning Context (pre-2012) . 34Planning 2012 – 2016 . 352017 to present . 383.6.RAV Network . 41High Wide Loads / Over Size Over Mass . 41Triple Road Train access (RAV10) . 423.7.Rail Network . 423.8.Port . 423.9.Geraldton Airport . 434. Traffic and Safety Assessment . 444.1.Current Traffic Demand . 44Traffic Volumes . 44Heavy Vehicles . 45Growth Trends (historical) . 45Seasonal Influence on traffic patterns . 48Seasonal Influence on Heavy Vehicles . 494.2.Speed Limits . 50HP Records Manager No. D20#642220 – DRAFT REPORT PENDING ENGAGEMENT OUTCOMESPage 4

Alignment Selection Report – Dongara Geraldton Northampton – Draft – August 20204.3.Crash History . 51Midblock Crashes . 51Intersection Crashes . 534.4.Future Traffic Volumes . 545. Road and Infrastructure Corridor Options . 565.1.Considerations . 565.2.Geometric Design Standards . 565.3.Road Corridor Alignment Options Considered . 56Option 1 – South . 56Option 2 – South . 57Option 3 – South . 57Option 4 – North . 57Option 5 – North . 57Option 6 – North . 586. Constraints Assessment . 596.1.Environmental Constraints – South . 59Reserves, Conservation Areas and Regional Parks . 59Wetlands & Waterways . 59Priority / Threatened Ecological Communities (PEC/TEC). 59Vegetation and Flora. 59Fauna . 60Acid Sulphate Soils (ASS) . 60Contaminated Areas & Unexploded Ordnance Areas . 606.2.Social Constraints – South . 60Indigenous Heritage . 60European Heritage . 60Existing Land Use and Facilities and Tenements . 61Property Impact – Severance and Access. 61Noise, Visual Amenity and Privacy . 61Air Quality . 616.3.Engineering Constraints – South . 61Topography and Hydrology . 61Drainage . 63Geology and Soil Conditions . 63Public Drinking Water . 63Services . 64Infrastructure . 64Constructability . 64Staging . 64Access . 65Road Network Performance . 65Road Safety . 656.4.Economic Assessment – South . 65Construction Cost Considerations . 65HP Records Manager No. D20#642220 – DRAFT REPORT PENDING ENGAGEMENT OUTCOMESPage 5

Alignment Selection Report – Dongara Geraldton Northampton – Draft – August 2020Whole of Life Costs . 65Land Cost Considerations . 65Network Benefits . 656.5.Environmental Constraints – North . 66Reserves, Conservation Areas and Regional Parks . 66Wetlands & Waterways . 66Threatened / Priority Ecological Communities (TEC/PEC). 66Vegetation and Flora. 66Fauna . 66Acid Sulphate Soils (ASS) . 66Contaminated Areas & Unexploded Ordnance Areas . 676.6.Social Constraints – North. 67Indigenous Heritage . 67European Heritage . 67Existing Land Use and Facilities and Tenements . 67Property Impact – Severance and Access. 67Noise, Visual Amenity and Privacy . 67Air Quality . 686.7.Engineering Constraints - North . 68Topography and Hydrology . 68Drainage . 68Geology and Soil Conditions . 68Public Drinking Water . 68Services . 68Infrastructure . 68Constructability . 69Staging . 69Access . 69Road Network Performance . 69Road Safety . 696.8.Economic Assessment . 69Construction Cost Considerations . 69Whole of Life Costs . 69Land Cost Considerations . 70Network Benefits

HP Records Manager No. Date Published The following document is the full draft version of the Dongara-Geraldton-Northampton Corridor Alignment Selection Report, written