RFI - Att 4 - Stwtr Mngmt Plan

                                                                                                            ingeniir

The site currently receives surface water runoff from the majority of 28 Banksia Street to the East.

The lawful point of discharge for the site is the Coral Tree Avenue Road Reserve.


3.       DESIGN OBJECTIVES
The objective of this report is to demonstrate that the project can comply with the Noosa Shire Council’s
codes and policies in relation to stormwater management through the implementation of the following
objectives;

     •   Maintain stormwater quality in accordance with local and state policies
     •   Manage and Mitigate quantities of peak stormwater discharge
     •   Adopt Water Sensitive Urban Design (WSUD) principles throughout
     •   Stormwater Harvesting and re-use for landscaping and alternative uses
     •   Provide immunity and resilience from flooding

This report outlines the design requirements to achieve the above objectives in a site-specific context.


4.       STORMWATER STRATEGY
The site is situated between Coral Tree Avenue on the East and Banksia Avenue on the West. There is
stormwater infrastructure in Coral Tree Avenue/Jan Street approximately 20m North of the site as shown in
Plate 2; however the existing infrastructure is deemed unsuitable for direct connection for the following
reasons.

     • The existing sewer line exiting the Northern side of the site is at a level where the stormwater would
       clash or require site connection at an acute angle further limited by the power pole and existing
       NBN/Telstra pit behind it.
     • The site discharge for piped flows (5%AEP) is 38L/s which is generally considered below the threshold
       to require direct network connection and would be considered a typical discharge rate for a
       residential allotment.




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