SCG Engineers letter · MCU17/0046

5 July 2017
SCG Ref: 26361(L1)

By email: [email protected]


Lisa Pienaar, Development Planner – Noosa Council
C/- Martoo Consulting


Dear Lisa

                                  Re: 38 Park Crescent, Sunshine Beach
                                        MCU 17/0046 OPW17/0160

In response to the Information Request dated 6 June 2017 for the above we comment as follows: -

   1. SCG Consulting Engineers (SCG) plans SCG 26361 have been updated to reflect the removal of the
      north-western driveway and visitor carpark.

   2. The reference to a Stormwater Management report on drawing SCG 26361-SW1 was made in error
      and no report has been produced. Similar duplex developments that SCG has been the Civil Engineer
      for have not required a report.

   3. The drainage pits located within the road reserve have been removed. The grated drain along the front
      property boundary has been increased in capacity to allow for the stormwater captured by these pits.

   4. A schematic elevation of the charged stormwater line has been added to drawing SCG 26361-SW2.
      The charged stormwater line has a slow leak pipe incorporated to allow drainage so it does not become
      a ‘wet line’. In addition to this an inspection opening will be provided to allow back flushing should it
      become blocked with debris.

   5. The intent of the gravel scour protection is to diffuse the velocity of the stormwater discharge from the
      grated drain. The gravel provides a harder, less erodible surface than the natural sand ground profile.
      A section through the gravel scour protection beds has been provided on SCG 26361-SW2, further
      explaining their function and proposed construction and maintenance.

   6. The site coverage of the proposed development will capture and contain more stormwater that falls
      over the site than, the pre-development conditions and therefore, reduce the total overland flow. All
      stormwater captured on the hardstand within the road reserve will be contained in the site stormwater
      disposal system.

   7. In order to provide access to the south-western visitor carpark and maintain realistic driveway grades a
      retaining wall will be required. The retaining wall will be of solid RC masonry construction with a design
      life of 25 years plus. As the footpath is on the western side of Park Crescent there will be no adverse
      impacts of pedestrian activity.