ProjectProponent: Main Roads Western AustraliaProposal description: Main Roads proposes to upgrade and widen a 2 km section of Tonkin Highway from four lanes to six lanes from approximately 1 km north of Kelvin Road extending south to Maddington Road. The Proposal will include construction of a grade separated interchange at Tonkin Highway and Kelvin Road and associated works such as PSP upgrade, installation of noise and retaining walls, drainage improvements and landscaping. Assessment Number: 2330Region: PerthReferred under EP Act: s38Industry sector: InfrastructureLast updated: April 13, 2022Current Status: Decision on whether to assess has been published 1. ReferralComment on this referral: Tonkin Highway Grade Separated Interchanges Kelvin RoadComment period: Friday, 11 March, 2022 to Thursday, 17 March, 2022Referral documentation: Referral Form Proposal Content Document Tonkin Highway GSI (Kelvin Road) - EPA Referral Supporting Document_Part1.pdf Tonkin Highway GSI (Kelvin Road) - EPA Referral Supporting Document_Part2.pdf Tonkin Highway GSI (Kelvin Road) - EPA Referral Supporting Document_Part3.pdf Tonkin Highway GSI (Kelvin Road) - Appendix 1.PDF Tonkin Highway GSI (Kelvin Road) - Appendix 2.PDF Tonkin Highway GSI (Kelvin Road) - Appendix 3.PDF Tonkin Highway GSI (Kelvin Road) - Appendix 4.PDF Tonkin Highway GSI (Kelvin Road) - Appendix 5.PDF Tonkin Highway GSI (Kelvin Road) - Appendix 6.PDF Tonkin Highway GSI (Kelvin Road) - Appendix 7.PDF 2. Decision on whether to assess this proposalChair's Determination: Assess - Additional Assessment Information (public review)Extract of determination: Tonkin Highway Grade Separated Interchanges Kelvin RoadPreliminary Environmental Factors: Flora and VegetationTerrestrial FaunaInland WatersDate published: Monday, 28 March, 2022 3. AssessmentRequest for further informationDate: Wednesday, 13 April, 2022File upload: CMS18158 - Notice requiring information for assessment - 130422