Matamata Piako District Council Geotechnical Assessment for Zoning Plan Change 10 February 2016 This page has been left intentionally blank Geotechnical Assessment for Zoning Plan Change Prepared for Matamata Piako District Council Prepared by Coffey Geotechnics (NZ) Ltd 96 Cameron Road, Tauranga Tauranga Central 3110 New Zealand t: +64 7 577 4288 10 February 2016 GENZTAUC16120AA-AB Quality information Revision history Revision Description Date Originator Reviewer Approver 2 Final Report 10/02/2016 SWH DAS DAS Distribution Report Status No. of copies Format Distributed to Date Final Report 1 PDF Matamata Piako District Council 10/02/2016 i Table of contents 1. Introduction ............................................................................................................................ 1 2. Scope and Objectives ............................................................................................................ 1 3. Data and References ............................................................................................................. 2 4. Geotechnical Assessment ...................................................................................................... 4 4.1. Site 1 – Tui Road, Te Aroha ......................................................................................... 4 4.1.1. Site Description ................................................................................................ 4 4.1.2. Site History ...................................................................................................... 5 4.1.3. Geology ........................................................................................................... 5 4.1.4. Liquefaction ..................................................................................................... 6 4.1.5. Flooding Hazard............................................................................................... 6 4.1.6. Slope Stability .................................................................................................. 8 4.1.7. Site Observation .............................................................................................. 8 4.2. Site 2 – Stirling Street, Te Aroha................................................................................... 9 4.2.1. Site Description ................................................................................................ 9 4.2.2. Site History .................................................................................................... 10 4.2.3. Geology ......................................................................................................... 10 4.2.4. Liquefaction ................................................................................................... 11 4.2.5. Flooding Hazard............................................................................................. 11 4.2.6. Slope Stability ................................................................................................ 12 4.2.7. Site Observation ............................................................................................ 13 4.3. Site 3 – Tower Road, Matamata ................................................................................. 14 4.3.1. Site Description .............................................................................................. 14 4.3.2. Site History .................................................................................................... 15 4.3.3. Geology ......................................................................................................... 15 4.3.4. Liquefaction ................................................................................................... 16 4.3.5. Flooding Hazard............................................................................................. 16 4.3.6. Slope Stability ................................................................................................ 16 4.3.7. Site Observation ............................................................................................ 16 4.4. Site 4 – State Highway 24 (Tauranga Road), Matamata.............................................. 17 4.4.1. Site Description .............................................................................................. 17 4.4.2. Site History .................................................................................................... 18 4.4.3. Geology ......................................................................................................... 18 4.4.4. Liquefaction ................................................................................................... 19 4.4.5. Flooding Hazard............................................................................................. 19 ii 4.4.6. Slope Stability ................................................................................................ 19 4.4.7. Site Observation ............................................................................................ 19 4.5. Site 5 – Horrell Road, Morrinsville ............................................................................... 20 4.5.1. Site Description .............................................................................................. 20 4.5.2. Site History .................................................................................................... 22 4.5.3. Geology ......................................................................................................... 22 4.5.4. Liquefaction ................................................................................................... 23 4.5.5. Static Settlement ............................................................................................ 23 4.5.6. Flooding Hazard............................................................................................. 23 4.5.7. Slope Stability ................................................................................................ 23 4.5.8. Site Observation ............................................................................................ 24 5. Summary ............................................................................................................................. 24 6. Conclusion ........................................................................................................................... 25 7. Limitations............................................................................................................................ 25 Tables Table 1: Records of boreholes drilled within and near Site 5 Figures Figure 1: Site 1 Location Plan Figure 2: Site 1 Council Zoning Map Figure 3: Site 1 Flood Hazard Survey Map Figure 4: Site 2 Location Plan Figure 5: Site 2 Council Zoning Map Figure 6: Site 2 Flood Hazard Survey Map Figure 7: Site 3 Location Plan Figure 8: Site 3 Council Zoning Map Figure 9: Site 4 Location Plan Figure 10: Site 4 Council Zoning Map Figure 11: Site 5 Location Plan Figure 12: Site 5 Council Zoning Map iii Appendices Appendix A - Photographs Appendix B – Definitions iv Geotechnical Assessment for Zoning Plan Change 1. Introduction Coffey Geotechnics (NZ) Limited (Coffey) has been engaged by Matamata Piako District Council (MPDC) to carry out a geotechnical assessment of five sites within Matamata, Morrinsville and Te Aroha. This scope of this report includes combining the findings of our desktop study and site observation to assess the adequacy of the sites for land-use changes. The report has been prepared in general accordance with the agreed Coffey Geotechnics services proposal1 and is considered to be appropriate for use as one of the supporting documents for a Plan Change application. 2. Scope and Objectives We understand that MPDC require a preliminary geotechnical assessment to support a plan change of the following five sites: 1. Tui Road, Te Aroha (Rezoning from Rural Residential to Residential) 2. Stirling Street, Te Aroha (Rezoning from Rural Residential to Residential) 3. Tower Road, Matamata (Rezoning from Rural to Residential) 4. State Highway 24 (Tauranga Road), Matamata (Rezoning from Rural to Industrial) 5. Horrell Road, Morrinsville (Rezoning from Rural to Rural Residential) With this purpose, the scope of the work was to: undertake a desktop study to review available Council information on hazards and geotechnical data, Council plan maps and any other information available; undertake a site observation from the perimeter of the five sites; assess the potential geotechnical constraints to the development of the sites; prepare a plan change report in line with MPDC requirements. 1 “Geotechnical Services Proposal for District Plan Review”, dated 10 December 2015, Reference: GENZTAUC16120AA-AA Coffey Geotechnics GENZTAUC16120AA-AB 1 10 February 2016 Geotechnical Assessment for Zoning Plan Change 3. Data and References MPDC provided Coffey with the following council records for the assessment: LIM Reports Land Information Memorandum for 47 Tui Road Te Aroha 3320, Reference: 05311/478.00- 8469, dated 6 June 2012. Land Information Memorandum for 121 Horrell Road RD 4 Morrinsville 3374, Reference: 05305/313.02-26239, dated 11 April 2012. Land Information Memorandum for 107 Horrell Road RD 4 Morrinsville 3374, Reference: 05305/313.04-33674, dated 20 July 2012. Land Information Memorandum for 2997 State Highway 26, RD4, Morrinsville, Reference: 05305/305.00, dated 30 March 2001. Matamata-Piako District