2019-12-11 SM Agenda - Item 1 - Attachment 7 - Final New Noosa Plan - Part 8-10 Schedule Appendix - Clean version

                  (iii)    Stormwater infrastructure shall comply with the relevant IPWEA and TMR standard drawings.
                  (iv)     Kerb entry catchpit without grates are the desired style of pit for cycling safety and to display Council’s
                           environmental messages in the lids.
                  (v)      Stormwater drainage easements shall be dedicated in favour of Council, excluding inter allotment drainage,
                           over all drain lines in private property. The width of the easement shall be a minimum of 4.0 metres wide and
                           increased when the depth of the pipe warrants or for multiple pipes the easement shall be pipe width plus
                           600 millimetres each side.
                  (vi)     Dissipaters, silt traps, oil arrestors and wetland basins shall be required as appropriate to reduce the impact
                           of development on the natural environment.
                  (vii)    Catchpit to catchpit connections are permitted in the head of catchments to avoid manhole lids in the driving
                           lane.
                  (viii)   Deflections in pipelines to be desirably less than 45 degrees.
                  (ix)     Saltwater cover class pipes are to be used in all tidal areas.
                  (x)      Pipe classes shall comply with Australian Standards in terms of cover.
                  (xi)     All pipes are to be rubber ring jointed.
                  (xii)    Bolt down lids are required when the clearance from design water level to pit lid is less than 300 millimetres.
                  (xiii)   Headwalls and childproof grates are required on all pipe culvert inlets and outlets over 600 millimetres.
                           Velocity dissipaters and rock gabions are required on all pipe outlets to reduce erosion.

           (j)    Downstream Drainage
                  (i)      The developer’s consultant is required to investigate the effect that the development may have on capacity of
                           the downstream drainage. If the downstream system or any property downstream will be adversely affected,
                           the consultant is to analyse the required mitigation works.
                  (ii)     If the existing drainage system will be undersized according to current standards as a result of the
                           development, the developer shall be responsible for augmenting or replacing the drainage system. The
                           drainage system must be capable of handling the designated design frequency up to and including the 1 in
                           100 year Average Recurrence Interval (ARI) storm event including the overland flow situation

           (k)    Roof downpipe drainage outlets
                  (i)      For each residential allotment, two approved kerb and channel adaptors are to be installed in the kerb 1.0
                           metre away from the side boundaries.
                  (ii)     For commercial development unless a direct connection to the underground system can be achieved, a
                           special conduit capable of providing the required capacity shall be fabricated from stainless steel so that it
                           grades to the invert of the kerb and channel and yet is shallow enough to accommodate the footpath surface
                           treatment without becoming a trip hazard.

           (l)    Earthworks
                  (i)      Where a development site requires cut/fill operations to enable the site to properly drain or keep the site
                           above flood levels, this work is to be completed prior to the construction of roads and other services.
                  (ii)     Filling works must be undertaken so that there is an acceptable development area above the 1 in 100 year
                           ARI flood level or where modelling is not available, the highest recorded flood level plus 300 millimetres.
                  (iii)    Excavation or filling works require an Operational Works development permit. The following information is
                           required as part of the application:
                           (A)   A drainage plan for the site indicating proposed drainage patterns, extent and depth of filling works and
                                 finished site levels;
                           (B)   A detailed engineering study of the implication of the filling works in relation to the drainage pattern of
                                 adjoining allotments and road reserves and an assessment of the increase, if any, of the flood heights
                                 upstream of the subject site.
                           (C)   The study should include sufficient survey information external to the site to determine existing
                                 drainage flows, in addition to recommended drainage works on the perimeter of the site, to prevent
                                 possible drainage problems on adjoining land;
                           (D)   An Erosion and Sediment Control Plan prepared by an appropriately qualified consultant in accordance
                                 with the Institution of Engineers Australia (Queensland Division) Soil Erosion and Sediment Control ­
                                 Guidelines for Queensland Construction Sites.



**FINAL DRAFT ­ Post Consultation 2019**
                                                                                                                                   Page 7 of 9