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Foothills Regional Water and Wastewater Collaborative (Frwwc) Final Report for: FOOTHILLS REGIONAL WATER AND WASTEWATER COLLABORATIVE (FRWWC) REGIONAL WASTEWATER TREATMENT FEASIBILITY STUDY Date: July 11, 2016 2210-047-00 Proud of Our Past… Building the Future www.mpe.ca Suite 320, 6715 –8 Street NE Calgary, AB T2E 7H7 Phone: 403-250-1362 1-800-351-0929 Fax: 403-250-1518 Foothills Regional Water and Wastewater Collaborative July 11, 2016 c/o Town of Okotoks Municipal Center File: N:\2210\047-00\L02-1.0 5 Elizabeth Street Okotoks, AB T1S 1K1 Attention: Matt Rockley, FRWWC Co-Chair Suzanne Oel, FRWWC Co-Chair Dear Mr. Rockley and Ms. Oel: Re: Regional Wastewater Feasibility Study Final Report We are pleased to submit a final copy of the “Regional Wastewater Feasibility Study” Final Report as requested by the Foothills Regional Water and Wastewater Collaborative (FRWWC). This study is completed in conjunction with Urban Systems Ltd. to provide the FRWWC with an assessment of viable sub-regional alternatives that were beyond that considered in the higher level Calgary Regional Partnership (CRP) work for the South Region. Please contact the undersigned with any questions that you may have. Yours truly, MPE ENGINEERING LTD. Sarah Fratpietro, P.Eng. Project Manager SF/pm Enclosure FRWWC Regional Wastewater Treatment Feasibility Study CORPORATE AUTHORIZATION This report has been prepared by MPE Engineering Ltd. and Urban Systems Ltd. under authorization of Foothills Regional Water and Wastewater Collaborative. The material in this report represents the best judgment of MPE Engineering Ltd. and Urban Systems Ltd. given the available information. Any use that a third party makes of this report, or reliance on or decisions made based upon it is the responsibility of the third party. MPE Engineering Ltd. and Urban Systems Ltd. accept no responsibility for damages, if any, suffered by a third party as a result of decisions made or actions taken based upon this report. Should any questions arise regarding content of this report, please contact the undersigned. MPE ENGINEERING LTD. (Pipeline and Lift Station Work) Sarah Fratpietro, P.Eng. Randy Boras, M.Sc. P.Eng MPE Engineering Ltd. MPE Engineering Ltd. Project Manager Senior Project Specialist URBAN SYSTEMS LTD. (WWTPs, PESTLE, and Stream Analysis) Leigh Chmilar, P.Eng. Steve Brubacher, P.Eng. Urban Systems Ltd. Urban Systems Ltd. Water Engineer Principal i FRWWC Regional Wastewater Treatment Feasibility Study TABLE OF CONTENTS LETTER OF TRANSMITTAL CORPORATE AUTHORIZATION EXECUTIVE SUMMARY 1.0 INTRODUCTION .................................................................................................................................... 5 1.1 OVERVIEW ....................................................................................................................................................... 5 1.2 BACKGROUND ................................................................................................................................................. 5 1.3 STUDY SCOPE ................................................................................................................................................. 6 2.0 SUMMARY OF TECHNICAL MEMORANDUMS ................................................................................ 8 2.1 TECHNICAL MEMORANDUM 1 (TM1) – PLANNING AND PROJECTIONS .......................................................... 8 2.1.1 Population and Flow Projections .................................................................................................. 8 2.1.2 Water License Summary ................................................................................................................. 9 2.1.3 Westend Regional Sewage Services Commission (WRSSC) .............................................. 10 2.1.4 M.D. of Foothills No. 31 ................................................................................................................. 11 2.1.5 High River ......................................................................................................................................... 11 2.1.6 Okotoks ............................................................................................................................................. 12 2.2 TECHNICAL MEMORANDUM 2 (TM2) – STREAM ANALYSIS .......................................................................... 12 2.3 TECHNICAL MEMORANDUM 3 (TM3) – OPTIONS & SCREENING .................................................................. 14 2.3.1 Projected Flows ............................................................................................................................... 14 2.3.2 Design Assumptions ...................................................................................................................... 15 2.3.3 Option 1 ............................................................................................................................................. 17 2.3.4 Option 2 ............................................................................................................................................. 17 2.3.5 Option 3 ............................................................................................................................................. 18 2.3.6 Option 4 ............................................................................................................................................. 19 2.3.7 WWTP Outfalls ................................................................................................................................. 19 2.3.8 Costs .................................................................................................................................................. 20 2.3.9 PESTLE Analysis ............................................................................................................................ 20 2.3.10 Two Preferred Options .............................................................................................................. 21 2.4 TECHNICAL MEMORANDUM 4 (TM4) – PREFERRED OPTIONS .................................................................... 22 2.4.1 Option 3 Pipeline Conceptual Design and Phasing ............................................................... 22 2.4.2 Option 3 WWTP Conceptual Design and Phasing .................................................................. 25 2.4.3 Option 4 Pipeline Conceptual Design and Phasing ............................................................... 26 2.4.4 Costs .................................................................................................................................................. 29 2.4.5 Comparison of Options ................................................................................................................. 32 2.5 TECHNICAL MEMORANDUM 5 (TM5) – WESTEND OPTIONS ........................................................................ 33 2.5.1 Projected Flows ............................................................................................................................... 34 2.5.2 Phasing of Options ......................................................................................................................... 34 2.5.3 Option 1 Local WWTP .................................................................................................................... 34 2.5.4 Option 2 Sub-Regional Pipeline .................................................................................................. 35 2.5.5 Costs .................................................................................................................................................. 35 3.0 CONCLUSIONS ................................................................................................................................... 38 4.0 RECOMMENDATIONS ....................................................................................................................... 41 5.0 REFERENCES ..................................................................................................................................... 42 ii FRWWC Regional Wastewater Treatment Feasibility Study APPENDICES Appendix A: Technical Memorandum 1 – Planning and Projections Appendix B: Technical Memorandum 2 – Stream Analysis Appendix C: Technical Memorandum 3 – Options & Screening Appendix D: Technical Memorandum 4 – Preferred Options Appendix E: Technical Memorandum 5 – Westend Options iii FRWWC Regional Wastewater Treatment Feasibility Study EXECUTIVE SUMMARY The Foothills Regional Water and Wastewater Collaborative (FRWWC) has explored a sub- regional wastewater management strategy for future wastewater collection and treatment servicing in the Sheep and Highwood River watersheds. The goal of this project is to improve the environmental quality of the rivers while meeting the water and wastewater needs of the member communities within the constraints of the system. This report and executive summary is a result of the collaboration of the FRWWC Governance and Technical Committees and the consulting team. The scope of this study includes building upon the Calgary Regional Partnership (CRP) Regional Water and Wastewater Servicing Masterplan (CRP 2014) and recently tendered costs at a “screening level”; establishes Total Cost of Operation (TCO) and Net Present Values (NPV); and considers 10, 25, and 60-year time frames. This study assumes that new Alberta Environment and Parks (AEP) high quality (HQ) effluent standards would need to be considered,
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