Wastewater Collection System Master Servicing Plan – Study
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STUDY REPORT WEST URBAN COMMUNITY – WASTEWATER COLLECTION SYSTEM MASTER SERVICING PLAN – STUDY FINAL Prepared for: City of Ottawa July 2012 RVA102174 This report is protected by copyright and was prepared by R.V. Anderson Associates Limited for the account of the City of Ottawa. The material in it reflects our best judgment in light of the information available to R.V. Anderson Associates Limited at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. R.V. Anderson Associates Limited accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. July 5th, 2012 RVA 102174 City of Ottawa Planning and Environment Infrastructure Policy Branch 4th Floor, 110 Laurier Ave. West Ottawa, ON K1P 1J1 Attention: Mr. Joseph Zagorsky, P.Eng. Dear Mr. Zagorsky: Re: West Urban Community Wastewater Collection System Master Servicing Plan – future projection study Thank you for providing comments on the draft version of our Master Servicing Plan study for the West Urban Community Wastewater Collection System. We are now pleased to present two copies of the final version herein. It was a pleasure working with you and we look forward future projects. Yours very truly, R.V. ANDERSON ASSOCIATES LIMITED Adrian Munteanu, P.Eng. Project Manager RA:de Encls. (2 copies) City of Ottawa TOC -1 WEST URBAN COMMUNITY WASTEWATER COLLECTION SYSTEM – MASTER SERVICING PLAN – STUDY REPORT TABLE OF CONTENTS Page EXECUTIVE SUMMARY ................................................................................................... 1 Background / Servicing Strategies ................................................................... 5 Flow Scenarios ................................................................................................... 6 Evaluation of Alternative Servicing Strategies .............................................. 10 Cost and Phasing Schedule ............................................................................ 13 1 INTRODUCTION .............................................................................. 14 1.1 Background and Authorization ............................................................ 14 1.2 Objectives ............................................................................................... 15 1.3 Scope of Work ........................................................................................ 16 1.4 Previous Relevant Studies .................................................................... 16 2 EXISTING WASTEWATER COLLECTION SYSTEM ...................... 18 2.1 Study area and existing configuration ................................................. 18 2.2 Existing conditions and constraints .................................................... 20 2.2.1 Acres Rd. – pump station and sewer trunks: ........................................... 21 2.2.2 Area serviced by March Rd. PS and Signature Ridge PS: ...................... 22 2.2.3 Area serviced by Hazeldean PS and Glen Cairn Trunk: .......................... 22 3 MODELING SCENARIO SELECTION ............................................. 23 3.1 Projected expansion and growth ......................................................... 23 3.2 Design Scenario selection .................................................................... 24 3.3 Future constraints and issues .............................................................. 27 4 SANITARY SEWER SERVICING STRATEGIES – ANALYSIS....... 28 4.1 Investigation approach .......................................................................... 28 4.2 Initial screening ..................................................................................... 31 WUC- Wastewater Collection System FINAL Master Servicing Plan - Study Report JULY, 2012 RVA 102174 City of Ottawa TOC -2 4.2.1 Initial Screening Strategy #1 .................................................................... 31 4.2.2 Initial Screening Strategy #2 .................................................................... 31 4.2.3 Initial Screening Strategy #3 .................................................................... 33 4.2.4 Development of Additional Strategies ...................................................... 33 4.3 Technical Screening – Development of Servicing Options ................ 34 4.3.1 Sewer Corridors Investigation .................................................................. 34 4.3.2 Servicing Options for Strategy #1: ........................................................... 40 4.3.3 Servicing Options for Strategy #2: ........................................................... 45 4.3.4 Servicing Options for Strategy #4: ........................................................... 49 4.4 Evaluation and ranking of sanitary sewer servicing options ............. 53 4.4.1 Evaluation Categories and Criteria .......................................................... 53 4.4.2 Servicing Options Ranking ...................................................................... 53 4.5 Modeling Scenario 3 results for Option 1B ......................................... 56 4.6 Enhancement Opportunities for Option 1B ......................................... 58 4.6.1 Lower Tri-Township Collector .................................................................. 58 4.6.2 Move KWPS to Palladium Drive .............................................................. 59 4.6.3 Acres Road Pumping Station................................................................... 59 4.7 Cost and Phasing Schedule .................................................................. 60 5 CONCLUSION AND RECOMMENDATIONS .................................. 62 WUC- Wastewater Collection System FINAL Master Servicing Plan - Study Report JULY, 2012 RVA 102174 City of Ottawa TOC -3 LIST OF FIGURES Figure 1-1: Location Plan ............................................................................................................ 15 Figure 2-1: Study Area ................................................................................................................ 19 Figure 3-1: Expansion / growth projection for 2060 .................................................................... 24 Figure 4-1: Servicing Strategy #2 – general plan ........................................................................ 29 Figure 4-2: Servicing Strategy #3 – general plan ........................................................................ 30 Figure 4-3: Proposed Sewer Trunk Corridors for Strategies #1 and #2 ...................................... 37 Figure 4-4: Proposed Sewer Trunk Corridors for Strategy #4 .................................................... 39 Figure 4-5: Strategy #1 – Option 1A ........................................................................................... 41 Figure 4-6: Strategy #1 – Option 1B and Option 1C ................................................................... 42 Figure 4-7: Strategy #1 – Option 1B / interceptor sewer routing options (reference – Stantec’s Technical Memorandum) .......................................................................... 44 Figure 4-8: Strategy #2 – Option 2A ........................................................................................... 47 Figure 4-9: Strategy #2 – Option 2B ........................................................................................... 48 Figure 4-10: Strategy #4 – Option 4A ......................................................................................... 51 Figure 4-11: Strategy #4 – Option 4B ......................................................................................... 52 LIST OF TABLES Table ES 1: WUC Flow Generation Scenarios ............................................................................. 7 Table ES 2: WUC growth development summary ........................................................................ 8 Table ES 3: WUC summary of flow generation scenarios ............................................................ 9 Table ES 4: Option Evaluation Results ....................................................................................... 11 Table ES 5: WUC Flow Generation Summary /preferred servicing solution _ Option 1B ........... 12 Table ES 6: Cost and Phasing Schedule .................................................................................... 13 Table 3-1: Projected area expansion and population growth (includes Bells Corners and Carp) ........................................................................................................................ 23 Table 3-2: WUC – Analysis of Design Flow Generation ............................................................. 25 Table 3-3: WUC wastewater flow generation / pumping stations and trunk sewers ................... 26 Table 4-1: Initial screening for Strategy #2 – gravity sewer from KW PS location to NKT sewer upstream end (tr01000) ................................................................................. 32 Table 4-2: Initial screening for Strategy #2 – gravity sewers from Hazeldean PS and Signature Ridge PS to the location of KW PS .......................................................... 32 Table 4-3: Initial Screening for Strategy #3 / inverts, distances and resulting trunk slopes ........ 33 WUC- Wastewater Collection System FINAL Master Servicing Plan - Study Report JULY, 2012 RVA 102174 City of Ottawa TOC -4 Table 4-4: Initial