P0198-25-001_12_Gympie_Street_Tewantin_SWMP

1           Introduction

1.1         Background and Scope
RECOR has been engaged by Novato Group to prepare a Stormwater Management Plan (SWMP) for the proposed
seven-lot residential development located at 12 Gympie Street, Tewantin.

This report has been prepared to support the Development Approval Application submission to Noosa Shire
Council and any nominated referral agencies. The proposed development’s property details have been summarised
in Table 1-1.

The SWMP addresses potential stormwater impacts resulting from the proposed development and outlines the
necessary mitigation measures to meet both quantity and quality requirements of Noosa Shire Council.

This report presents the hydrological assessment of the proposed development, including any external catchments
that may directly influence peak flows exiting the site. The purpose of the assessment is to ensure that post-
development stormwater discharge does not adversely impact existing flooding or stormwater conveyance
conditions on surrounding properties and that the stormwater management objectives of the QUDM and Noosa
Shire Council requirements are achieved.

Additionally, the assessment evaluates pollutant load reductions to ensure compliance with Water by Design
guidelines and council water quality requirements.



Table 1-1 Property Details

 Site Details                         Parameters

 Site Location                        12 Gympie Street, Tewantin QLD

 Lot Number                           42 RP867323

 Intended Land Use                    Reconfigure of Lot for residential housing

 Development Area                     5897 m2




1.2         Stormwater Management Objectives and Design Approach
The intent of this report is to document the design considerations and outcomes that satisfy the stormwater
management objectives for the proposed development. The strategy has been developed to address the
following key aspects and performance objectives:

     •    Catchment Definition: Identification of all catchments and sub-catchments discharging through or into
          the site.

     •    Hydrological Assessment: Determination of existing flow conditions for multiple storm events and
          assessment of development impacts on surrounding properties.

     •    Flow Management: Ensuring post-development peak flows do not exceed pre-development flows
          across all relevant storm events, up to and including the 1% AEP.

     •    Lawful Point of Discharge: Identification and utilisation of a lawful point of discharge in accordance with
          the Queensland Urban Drainage Manual (QUDM), ensuring no actionable nuisance to downstream
          properties or infrastructure.



 12 GYMPIE STREET, TEWANTIN
 Stormwater Management Plan                                                                                        4
 Client Reference: P0198-25-001           4 November 2025
 Prepared for Novato Group