17 Bottlebrush Avenue, · MCU26/0001

2           Existing Site

2.1         Site Overview
The site, located at 17 Bottlebrush Avenue, Noosa Heads, is bounded by residential properties to the northwest,
southeast and northeast, and is bound by Bottlebrush Avenue in the southwest and has a single site access
driveway along this boundary. Properties to the northeast are zoned low residential, properties to the northwest
and southeast are zoned as high density residential, and the properties to the southwest are zoned as a major
centre, as per the Noosa plan 2020 – Amendment 2.

Topography generally falls to the southwest with observed ground levels ranging from approximately RL 37 m AHD
in the northeast to approximately RL 31 m AHD in the southwest.

Drainage across the site occurs in one primary direction to the southwest into Bottlebrush Avenue, which is picked
up by the local stormwater infrastructure via kerb and channel before entering the drainage network.

Stormwater infrastructure is located in the site conveying flows from the northeastern lots into the stormwater
network located in Bottlebrush Avenue.




Figure 2-1: Subject Site Location (QLD Globe, 2025)




2.2         Flow calculation using the Rational Method
The Rational Method was initially applied as a verification tool to cross-check outputs from the DRAINS
hydrological model, which was subsequently developed to assess both pre- and post-development flows.


 17 BOTTLEBRUSH AVENUE, NOOSA HEADS
                                                  7 January 2026                                  P a g e |6
 Stormwater Management Plan
 Client Reference: P0433-25-001
 Prepared for Made Capital PTY LTD