2020-07-16-sm-agenda-item-1-attachment-5-final-noosa-plan-2020-part-8-10-schedules-appendix

                        (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.
                                 (E)   The erosion Plan should address all relevant matters including the methods proposed to avoid the
                                       creation of a dust nuisance around the site or on the lead­in roads; and the methods proposed to avoid
                                       the transmission of soil onto the surrounding roads which is picked up on the tyres of vehicles and
                                       plant working on the site, and carting material to and from the site.

                        (iv)     If trees and existing vegetation are to be removed from the site, the application should include plans showing
                                 all existing vegetation and the areas where it is to be removed. Reasons for the removal of the vegetation
                                 should be documented and submitted in support of the proposed removal. The plans should also show the
                                 extent of fill to be placed, any retaining structures, existing level, proposed level, proposed drainage, materials
                                 to be used and structural engineering details.
                        (v)      Approval to proceed with filling of the land is on the basis that it is the Developer’s responsibility to notify all
                                 adjoining landowners of the work being undertaken, and that all work must not adversely affect the drainage
                                 of any adjoining allotments. A detailed survey of drainage patterns on adjoining lots may be required.
                        (vi)     All filling works are to be supervised by a recognised Geotechnical Engineer and shall be compacted to a
                                 95% relative dry density in accordance with the Department of Transport standard compaction test.
                        (vii)    The Geotechnical Engineer shall certify that all lots have been compacted to the required minimum Level 1 or
                                 level 2 as required (supervision) standard. “As Constructed” details showing the extent and finished levels of


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