111 – 113 Queen Street, 106 – 116 Sparks Street, Ottawa
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111 – 113 Queen Street, 106 – 116 Sparks Street, Ottawa Servicing Report Prepared for: Ashcroft Homes Prepared by: Stantec Consulting Ltd. June 5, 2015 Sign-off Sheet This document entitled 111 – 113 Queen Street, 106 – 116 Sparks Street, Ottawa was prepared by Stantec Consulting Ltd. (“Stantec”) for the account of Ashcroft Homes (the “Client”). Any reliance on this document by any third party is strictly prohibited. The material in it reflects Stantec’s professional judgment in light of the scope, schedule and other limitations stated in the document and in the contract between Stantec and the Client. The opinions in the document are based on conditions and information existing at the time the document was published and do not take into account any subsequent changes. In preparing the document, Stantec did not verify information supplied to it by others. Any use which a third party makes of this document is the responsibility of such third party. Such third party agrees that Stantec shall not be responsible for costs or damages of any kind, if any, suffered by it or any other third party as a result of decisions made or actions taken based on this document. Prepared by (signature) Dustin Thiffault, P.Eng. Reviewed by (signature) Kris Kilborn 111 – 113 QUEEN STREET, 106 – 116 SPARKS STREET, OTTAWA Table of Contents 1.0 INTRODUCTION ............................................................................................................. 1.1 2.0 BACKGROUND .............................................................................................................. 2.2 3.0 WATER DISTRIBUTION .................................................................................................... 3.3 4.0 SANITARY SERVICING ................................................................................................... 4.1 4.1 BACKGROUND .................................................................................................................. 4.1 4.2 DESIGN CRITERIA ............................................................................................................... 4.1 4.3 PROPOSED SERVICING .................................................................................................... 4.2 5.0 STORMWATER MANAGEMENT ...................................................................................... 5.3 5.1 OBJECTIVES ........................................................................................................................ 5.3 5.2 SWM CRITERIA AND CONSTRAINTS ................................................................................ 5.3 5.3 STORMWATER MANAGEMENT DESIGN .......................................................................... 5.3 5.3.1 Design Methodology ..................................................................................... 5.3 5.3.2 Water Quality Control ................................................................................... 5.4 5.3.3 Water Quantity Control ................................................................................ 5.4 5.3.4 Allowable Release Rate ............................................................................... 5.4 5.3.5 Storage Requirements .................................................................................. 5.4 5.3.6 Results............................................................................................................... 5.6 5.3.7 Water Temperature Control ......................................................................... 5.7 6.0 GRADING AND DRAINAGE .......................................................................................... 6.8 7.0 UTILITIES .......................................................................................................................... 7.1 8.0 EROSION CONTROL DURING CONSTRUCTION ........................................................... 8.1 9.0 GEOTECHNICAL INVESTIGATION ................................................................................. 9.2 10.0 CONCLUSIONS ............................................................................................................ 10.3 10.1 WATER SERVICING .......................................................................................................... 10.3 10.2 SANITARY SERVICING ..................................................................................................... 10.3 10.3 STORMWATER SERVICING .............................................................................................. 10.3 10.4 GRADING ......................................................................................................................... 10.3 10.5 UTILITIES ............................................................................................................................. 10.3 10.6 APPROVAL / PERMITS ..................................................................................................... 10.4 111 – 113 QUEEN STREET, 106 – 116 SPARKS STREET, OTTAWA LIST OF TABLES Table 1: Building Volume Calculation ....................................................................................... 3.5 Table 2: Site Sanitary Discharge Rates ...................................................................................... 4.2 Table 3: Target Release Rate ...................................................................................................... 5.4 Table 4: Peak Controlled (Rooftop) 5-Year Release Rate ..................................................... 5.5 Table 5: Peak Controlled (Rooftop) 100-Year Release Rate ................................................. 5.5 Table 6: Peak Controlled (Tributary) 5-Year Release Rate .................................................... 5.6 Table 7: Peak Controlled (Tributary) 100-Year Release Rate ................................................ 5.6 Table 8: Estimated Discharge From Site (5-Year) .................................................................... 5.6 Table 9: Estimated Discharge From Site (100-Year) ................................................................ 5.6 Table 10: Pavement Structure – Car Only Parking Areas ...................................................... 9.2 LIST OF FIGURES Figure 1: Site Location .................................................................................................................. 1.1 LIST OF APPENDICES APPENDIX A : EXCERPTS FROM ‘FIRE PROTECTION WATER SUPPLY GUIDELINE FOR PART 3 IN THE OBC’ .............................................................................................. A.1 APPENDIX B : SANITARY SEWER DESIGN SHEET .............................................................. B.2 APPENDIX C : STORMWATER MANAGEMENT ................................................................. C.3 C.1 Storm Sewer Design Sheet ............................................................................................. C.3 C.2 Modified Rational Method Calculations ..................................................................... C.4 APPENDIX D : DRAWINGS................................................................................................ D.5 111 – 113 QUEEN STREET, 106 – 116 SPARKS STREET, OTTAWA Introduction June 5, 2015 1.0 INTRODUCTION Stantec has been retained by Ashcroft Homes to prepare the following servicing study to satisfy the City of Ottawa Site Plan Control Application process. The site is located at Queen and Sparks Street, west of Metcalfe Street (see Figure 1 below). The existing site is currently zoned Mixed-Use Downtown Zone (MD) and is partially occupied with at grade parking and an older structure facing Sparks Street. The proposed development consists of an 18 storey residential building fronting on Queen Street with a 6 storey mixed use (retail/residential) building fronting Sparks Street, comprising of 147 residential units on the Queen Street frontage and 55 residential units on the Sparks Street frontage. The approximate site area for redevelopment is 0.241ha. Pre-consultation was carried out by Roderick Lahey Architects with City staff in 2010, lead by Mr. Doug Bridgewater, Planner III, Central District. Figure 1: Site Location dt w:\active\160400811_queens_sparks_street\design\report\2015\rpt_2015_06_05.docx 1.1 111 – 113 QUEEN STREET, 106 – 116 SPARKS STREET, OTTAWA Background June 5, 2015 2.0 BACKGROUND Documents referenced in preparation of the design for the Queen Street development include: Preliminary Serviceability Analysis, Stantec Engineering, May 9, 2011. (In support of zoning of subject site) Geotechnical Investigation Report, Paterson Group, August 1, 2012. Environmental Effect Analysis Report, EXP, February 27, 2015 City of Ottawa Sewer Design Guidelines, City of Ottawa, October 2012. City of Ottawa Design Guidelines – Water Distribution, City of Ottawa, July 2010. dt w:\active\160400811_queens_sparks_street\design\report\2015\rpt_2015_06_05.docx 2.2 111 – 113 QUEEN STREET, 106 – 116 SPARKS STREET, OTTAWA Water Distribution June 5, 2015 3.0 WATER DISTRIBUTION The proposed multi-storey development adjacent to the intersection of Queen Street and Metcalfe Street is located within the City of Ottawa’s Zone 1W Pressure Zone. Pressure Zone 1W is fed directly from both the Lemieux Island Water Purification Plant’s and the Britannia Water Purification Plant’s high lift pumping stations. Water is also boosted into Zone 1W through the gravity fed Fleet Street Booster Pumping Station located just downstream of Lemieux Island. Water flows through Zone 1W through large transmission