Stormwater Quality Management Plan - Yaroomba …

1 Yaroomba Village and International Resort, SQMP; Revision B; | The SMEC Group | 1 Yaroomba Village and International Resort Stormwater Quality Management Plan 23 March 2017 Yaroomba Village and International Resort, SQMP; Revision B; | The SMEC Group | 1 DOCUMENT/REPORT CONTROL FORM File Location Name: I:\Projects\30031110\005_Ops\Water Resources\Report\SQMP\ Project Name: Yaroomba Village and International Resort, SQMP Project Number: 30031110 Revision Number: Rev B Revision History Revision # Date Prepared by Reviewed by Approved for Issue by Rev A Leon Evans Ashley Zanetti Chris Green Rev B Kellie Thomsen Brendon Bolt Carl Wilkinson Issue Register Distribution List Date Issued Number of Copies Sekisui House x1 electronic Office Library [Sunshine Coast] x1 electronic SMEC Project File x1 electronic SMEC Company Details [SMEC] Level 1, Building C, 6 Innovation Parkway, Birtinya, QLD, 4575 Tel: +07-3029 6700 Email: Website: The information within this document is and shall remain the property of.

2 Sekisui House and SMEC. Yaroomba Village and International Resort, SQMP; Revision B; | The SMEC Group | 2 IMPORTANT NOTICE This report is confidential and is provided solely for the purposes of outlining Stormwater Management measures for the property owned by Sekisui House at David Low Way, Yaroomba . This report is provided pursuant to a Consultancy Agreement between SMEC Australia Pty Limited ( SMEC ) and Sekisui House under which SMEC undertook to perform a specific and limited task for Sekisui House . This report is strictly limited to the matters stated in it and subject to the various assumptions, qualifications and limitations in it and does not apply by implication to other matters.

3 SMEC makes no representation that the scope, assumptions, qualifications and exclusions set out in this report will be suitable or sufficient for other purposes nor that the content of the report covers all matters which you may regard as material for your purposes. This report must be read as a whole. The executive summary is not a substitute for this. Any subsequent report must be read in conjunction with this report. The report supersedes all previous draft or interim reports, whether written or presented orally, before the date of this report. This report has not and will not be updated for events or transactions occurring after the date of the report or any other matters which might have a material effect on its contents or which come to light after the date of the report.

4 SMEC is not obliged to inform you of any such event, transaction or matter nor to update the report for anything that occurs, or of which SMEC becomes aware, after the date of this report. Unless expressly agreed otherwise in writing, SMEC does not accept a duty of care or any other legal responsibility whatsoever in relation to this report, or any related enquiries, advice or other work, nor does SMEC make any representation in connection with this report, to any person other than Sekisui House .Any other person who receives a draft or a copy of this report (or any part of it) or discusses it (or any part of it) or any related matter with SMEC, does so on the basis that he or she acknowledges and accepts that he or she may not rely on this report nor on any related information or advice given by SMEC for any purpose whatsoever.

5 Yaroomba Village and International Resort, SQMP; Revision B; | The SMEC Group | 3 TABLE OF CONTENTS INTRODUCTION ..6 Site Characteristics .. 6 2. Stormwater Quality Management ..8 Design Objectives .. 8 Stormwater Quality Strategy .. 8 Modelling Approach .. 9 music Parameters .. 9 Catchment Areas ..10 music Model Layout ..10 Treatment Measures ..12 Rainwater Harvesting Tanks ..12 Bioretention Swales ..12 Bioretention Basins ..12 WSUD Measures ..13 music Results ..15 3. CONSTRUCTION Management .. 16 4. OPERATIONAL PHASE Stormwater Management .. 17 5. CONCLUSION AND RECOMMENDATIONS.

6 18 6. REFERENCES .. 19 APPENDIX A SITE LAYOUT .. 20 Yaroomba Village and International Resort, SQMP; Revision B; | The SMEC Group | 4 LIST OF FIGURES Figure 0-1: Locality Plan (Source: GoogleMaps 2017) .. 7 Figure 2-1: Schematic of Proposed Treatment Strategy .. 8 Figure 2-2: MUISC Model Layout ..11 Figure 2-3: Typical Bio-retention basin Cross-section (FAWB 2009) ..13 Figure 2-4: Water Quality Catchment and Indicative Locality Yaroomba Village and International Resort, SQMP; Revision B; | The SMEC Group | 5 LIST OF TABLES Table 2-1 music Rainfall-runoff parameters .. 9 Table 2-2 music Base and Storm Flow Concentration Parameters.

7 9 Table 2-3 music Catchments ..10 Table 2-4 Proposed WSUD measures to achieve WQO s ..13 Table 2-5 music Results ..15 Yaroomba Village and International Resort, SQMP; Revision B; | The SMEC Group | 6 has been commissioned by Sekisui House to develop a Stormwater Quality Management Plan (SQMP) to support a Material Change of Use application for the development of a development site at David Low Way, Yaroomba known as the Yaroomba Village and International Resort (formerly the Beachside Precinct). The Beachside Precinct was part of the Historical Hyatt Master Plan, located on the eastern side of the David Low Way in Yaroomba .

8 The original plans for the site developed in 2005 included a resort and gated residential subdivision. The plan for the site includes a revised density residential development, centred around a major 5-star (6-star green rating) international resort hotel equipped with public amenities. The development proposal over the site is for Stage 1 (refer Appendix A). This SQMP has been prepared to address the entire development site Stages 1 to 5. Whilst the development intent of Stage 1 is known, the anticipated development intensities for the remaining stages 2 to 5 were represented. The Pollution Load Reduction Targets have been derived from the Stormwater Management Code of the Sunshine Coast Planning Scheme 2014.

9 From this, the load based Water Quality Objectives (WQO s) stipulated in the State Planning Policy July 2014 (DSDSIP) for the South East Queensland region will be adopted for the site. The purpose of this SMP is to identify the Stormwater Quality and detention options required to be implemented within the site to achieve elements of these codes. The objectives of this SMP are to: Ensure the proposed development maintains or improves the environmental values ofthe receiving waters within the receiving catchment throughout the operational phase; Consider suitable Stormwater Quality Improvement Devices (SQID s) based on WaterSensitive Urban Design (WSUD) principles; Recommend an appropriate Stormwater treatment strategy for the proposeddevelopment that complies with Sunshine Coast Council (SCC) water Quality objectives.

10 A previous Stormwater Quality Management Plan (12 September 2013) was prepared by SMEC for the previous development layout over the site. This report and its recommendations supersedes the SMEC (2013) report. Site Characteristics The location of the proposed development site is shown in Figure 1-1. The proposed developed site is located on the eastern side of the David Low Way at Yaroomba , and is bound by an existing residential estate (Beachside South) in the south, Warragah Parade to the north and the ocean to the east. The catchment affecting the site itself, on the eastern side of David Low Way is approximately 49 ha and elevations range from to AHD.