17 Bottlebrush Avenue, · MCU26/0001

Executive Summary
RECOR Consulting Engineers have been engaged by Made Capital to prepare a Stormwater Management Plan
(SWMP) to support a Development Approval Application for a proposed Material Change of Use (MCU), from a
single dwelling into a multiple dwelling residence at 17 Bottlebrush Avenue, Noosa Heads.

This SWMP outlines the stormwater management strategy for the proposed development and demonstrates
compliance with the Noosa Shire Council (NSC) Planning Scheme Policies, the Queensland Urban Drainage Manual
(QUDM), and Water by Design guidance material. The report establishes that the development can be constructed
and operated in accordance with acceptable stormwater quantity and quality performance objectives.

Lawful Point of Discharge

All stormwater runoff from the development will be directed to a single lawful point of discharge into Council’s
existing stormwater system in Bottlebrush Avenue. The onsite drainage system consolidates flows and integrates
with downstream infrastructure. The discharge arrangement has been verified through hydraulic modelling and is
consistent with Council’s lawful discharge requirements.

Stormwater Quantity

The hydrological assessment was undertaken using both the Rational Method and DRAINS modelling to establish
pre-development baseline conditions and to assess post-development impacts.

Results confirmed an increase in peak flow rates from underdeveloped conditions due to added impervious
surfaces. To mitigate these effects, the use of a detention tank is proposed within the southwestern portion of the
site.

Hydrological modelling confirms that post-development discharges remain equal to or below pre-development
flows across all assessed Annual Exceedance Probability (AEP) storm events, refer to section 3.3.

Stormwater Quality

The site does not exceed the thresholds of the SPP Part E – Water Quality and therefore does not require MUSIC
modelling or formal stormwater quality treatment. The proposed works are less than 2,500 m² and involves fewer
than six lots.

The proposed management approach aligns with the Urban Stormwater Quality Planning Guidelines (2010) and
ensures that stormwater discharges do not adversely impact downstream waterways.

Erosion and Sediment Control

During the construction phase, ESC measures must be implemented in accordance with the applicable
requirements.




 17 BOTTLEBRUSH AVENUE, NOOSA HEADS
                                        7 January 2026                                             P a g e |3
 Stormwater Management Plan
 Client Reference: P0433-25-001
 Prepared for Made Capital PTY LTD