WATER and STORMWATER MANAGEMENT PLAN
Total Page:16
File Type:pdf, Size:1020Kb
Special Council Meeting 19 May 2020 Attachments Attachment 8.1.1.10 WATER and STORMWATER MANAGEMENT PLAN CHALET RIGI RESTAURANT, PIESSE BROOK, KALAMUNDA, WA 6076 DECEMBER 2019 City of Kalamunda 62 Special Council Meeting 19 May 2020 Attachments Attachment 8.1.1.10 Water and Stormwater Management Plan, Chalet Rigi Restaurant, December 2019 WATER AND STORMWATER MANAGEMENT PLAN CHALET RIGI RESTAURANT, PIESSE BROOK, KALAMUNDA, WA 6076 DECEMBER 2019 Report Author: Francesca Flynn, Managing Director (MSc, BSc (Hons)) Report Approver: Francesca Flynn, Managing Director (MSc, BSc (Hons)) Report Prepared for: Fallright Property Unit Trust Revision Date Status Comment Approver Signature 0 9 December 2019 FINAL - EVERGREEN CONSULTANCY WA PTY LTD ABN 92 632 423 431 PO BOX 215, GLEN FORREST, WA 6071 [email protected] © Evergreen Consultancy WA Pty LTD This document is the property of Evergreen Consultancy WA Pty Ltd. This document and the information contained in it are solely for the use of the authorised recipient and this document may not be used, copied or reproduced in whole or part for any purpose other than that for which it was supplied by Evergreen Consultancy WA Pty Ltd. Evergreen Consultancy WA Pty Ltd makes no representation, undertakes no duty and accepts no responsibility to any third party who may use or reply upon this document and the information contained in it. 2 © Evergreen Consultancy WA Pty Ltd City of Kalamunda 63 Special Council Meeting 19 May 2020 Attachments Attachment 8.1.1.10 Water and Stormwater Management Plan, Chalet Rigi Restaurant, December 2019 TABLE OF CONTENTS ABBREVIATIONS AND ACRONYMS ......................................................................................................................................... 6 EXECUTIVE SUMMARY .................................................................................................................................................................... 7 1. INTRODUCTION ....................................................................................................................................................................... 8 1.1. Background ........................................................................................................................................................................... 8 1.2. Previous Works and Approvals ................................................................................................................................... 8 1.3. Scope of Work ...................................................................................................................................................................... 9 1.4. Objectives ............................................................................................................................................................................ 10 1.5. Review of Previous Information .............................................................................................................................. 10 2. SITE SETTING .......................................................................................................................................................................... 12 2.1. Site Location....................................................................................................................................................................... 12 2.2. Climate .................................................................................................................................................................................. 12 3. GEOLOGICAL SETTING ....................................................................................................................................................... 13 3.1. Topography ........................................................................................................................................................................ 13 3.2. Geology and Landform ................................................................................................................................................. 13 3.2.1. Regional .......................................................................................................................................................................... 13 3.2.2. Local Conditions .......................................................................................................................................................... 14 3.3. Geotechnical Investigations ....................................................................................................................................... 14 3.3.1. February 2019, Galt Geotechnics ....................................................................................................................... 14 3.3.2. October 2019, Structerre ........................................................................................................................................ 15 3.3.3. November 2019, Evergreen Consultancy ....................................................................................................... 16 3.4. Vegetation ........................................................................................................................................................................... 16 3.4.1. Regional .......................................................................................................................................................................... 16 3.4.2. Local .................................................................................................................................................................................. 17 4. REGIONAL HYDROLOGY AND DRAINAGE .............................................................................................................. 18 4.1. Regional Catchment ....................................................................................................................................................... 18 4.2. Flood Risk Mapping ....................................................................................................................................................... 19 4.3. Groundwater ...................................................................................................................................................................... 19 4.4. Public Drinking Water Source Area (PDWSA) .................................................................................................. 19 4.5. Recreational Land Use in PDWSA ........................................................................................................................... 20 4.6. Local Surface Water Bodies ........................................................................................................................................ 21 4.7. Surface Water Monitoring .......................................................................................................................................... 22 5. WASTEWATER TREATMENT ........................................................................................................................................... 26 5.1. Introduction ....................................................................................................................................................................... 26 5.2. System Design ................................................................................................................................................................... 26 5.3. Treatment Technology ................................................................................................................................................. 26 5.4. Design Loading and Effluent Standards .............................................................................................................. 28 5.5. Construction and Installation.................................................................................................................................... 29 5.6. Maintenance and Monitoring ................................................................................................................................... 30 3 © Evergreen Consultancy WA Pty Ltd City of Kalamunda 64 Special Council Meeting 19 May 2020 Attachments Attachment 8.1.1.10 Water and Stormwater Management Plan, Chalet Rigi Restaurant, December 2019 5.7. BioMAX Advantages ...................................................................................................................................................... 31 6. EFFLUENT IRRIGATION SYSTEM ................................................................................................................................... 33 6.1. Irrigation System ............................................................................................................................................................. 33 6.2. Irrigation Area Size ......................................................................................................................................................... 33 6.3. Irrigation Area Location ............................................................................................................................................... 34 6.3.1. Location Rationale ....................................................................................................................................................