RFI - Black & More - Stormwater Management Plan

 20 March 2020                                                                                         Our ref: 195 Weyba Road SMP
                                                                                                                        File ref: 7465
                                                                                                          [email protected]




 Noosa District Body Corporate Management
 Suite 9
 41 Sunshine Beach Road
 Noosa Heads QLD 4567


 Attention: Andrew Davidson



 Dear Andrew
 195 WEYBA ROAD DEVELOPMENT
 STORMWATER MANAGEMENT PLAN

 Executive Summary
 This letter presents the stormwater management plan for the development at 195 Weyba Road.
 As part of the development there is a slight increase in roof area which results in an almost negligible amount of additional
 runoff.
 Black & More were informed that there is a requirement to maintain a maximum of 25L/sec out of each kerb adaptor, although
 the design event was not specified. Council planning scheme was also consulted for further requirements, specifically “PSP05
 – Engineering Design Standards – Roads, Drainage and Earthworks”.
 It is proposed to install two kerb adaptors and evenly split roof water flows between them. Also, it is proposed to install a surface
 drainage pit in the covered car park, which will mainly address maintenance flows (i.e. flows from hose) but will also provide
 relief if flooding were to occur.
 The open areas will will maintain existing ground levels and grades. Any landscaping work will maintain a 1% grade toward the
 street and promote sheet flow.
 Please refer to the attached roof plan mark-up which detailed the proposed stormwater drainage measures. Please note the
 location of downpipes and underground pipes shown is indicative only and is to be confirmed with the architect. The location of
 the kerb adaptors, however, shall be 1m offset from the lot boundaries, as per Noosa Council’s design standards. Roof flows
 shall be split between the kerb outlets.
 These proposed measures will provide an overall improvement to the stormwater drainage of the site.


 Please do not hesitate to contact our office should you wish to discuss this further.


 Yours sincerely
 BLACK & MORE




 Peter Mathers
 Principal Civil Engineer




 Encl:   Proposed Stormwater Mark-up


www.blackm.com                                                                                                7/28 Sunshine Beach Rd
                            BRISBANE       |   CAIRNS     |   SUNSHINE COAST          |   TOOWOOMBA
ABN: 19 609 960 232                                                                                                       PO Box 611
Ph: 07 5447 4444                                                                                               Noosa Heads QLD 4567