Meeting papers

SERVICES & ORGANISATION COMMITTEE MEETING                                                11 JULY 2023


5.1       CN00375 - RETAINING WALL RECONSTRUCTION - ARKANA DRIVE


Author               Project Officer, James Santifort
                     Infrastructure Services Department
Index                ECM/Projects & Contracts/CN00375 Retaining Wall Reconstruction -
                     Arkana Drive / Reports to Council
Attachments          1.   CN00375 - Weighted
                          Attribute Evaluation Workbook - Final Outcome


EXECUTIVE SUMMARY
      •   This report provides a recommendation for the contract award of the preferred contractor for
          Contract No. CN00375 fo Retaining Wall Reconstruction - Arkana Drive, Noosa Heads.
      •   This is a lump sum price contract that will include all materials and services required for the
          reconstruction of the retaining wall.
      •   In accordance with Local Government Legislation and Council Procurement Policy, an
          Invitation to Tender was initiated and which attracted three (3) tender responses. All three of
          these responses were conforming.
      •   The tender evaluation panel completed the evaluation process and considered the tender
          submission from Sunshine Civil Solutions Pty Ltd the most advantageous to Council,
          representing value for money. The Sunshine Civil Solutions Pty Ltd tender submission
          demonstrated compliance with the requirements of the invitation to tender. Sunshine Civil
          Solutions Pty Ltd has the suitable experience, capability, and resourcing to complete the
          works.
RECOMMENDATION
That Council note the report by the Project Officer to the Services & Organisation Committee Meeting
dated 11 July 2023 and:
A. Award contract no. CN00375 Retaining Wall Reconstruction - Arkana Drive to Sunshine Civil
   Solutions Pty Ltd for the lump sum price of $409,904.22 (excl. GST); and
B. Authorise the CEO to negotiate the final contract with Sunshine Civil Solutions Pty Ltd.


REPORT
Failure of the retaining wall in the median strip of Arkana Drive was first observed in 2015.
Further geotechnical investigations have found that the bank instability is not limited to the
extents of the existing retaining wall but rather extends 131m. The slope in its current position
is considered ‘marginal’ in terms of global instability with an assessed risk of ‘moderate’ to ‘high’
in accordance with Australian Geomechanics Society (AGS) guidelines.

Council engaged a structural engineering consultant who designed a grouted rock wall solution
to improve stability and prevent further slips in the median strip. The rock wall stretches the
whole 131m section, and is approximately 1.2m high.




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