Mayfield West Phase Two Secondary Plan Water and Wastewater Servicing Study Part A Report Town of Caledon

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1 Water and Wastewater Servicing Study Part A Report Town of Caledon Prepared by 170 Steelwell Road Suite 200 Brampton ON L6T 5T3 Canada File No: MTB The material in this report reflects best judgement in light of the information available at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions made based on it, are the responsibilities of such third parties. accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report.

2 Town of Caledon i Table of Contents 1.0 Introduction General Study Purpose Land Uses and Major Features Background Planning Requirements Population Data and Projections Region of Peel Design Criteria Review of Previous Reports and Studies Sanitary Servicing Existing Wastewater Infrastructure Planned Wastewater Infrastructure Wastewater Infrastructure Summary Water Servicing Existing Water Infrastructure Planned Water Infrastructure Water Infrastructure Summary Conclusions Tables Table 1 Existing Wastewater Infrastructure... 6 Table 2 Planned Wastewater Infrastructure... 8 Table 3 Existing local and Regional Water Infrastructure Table 4 Planned Regional Water Infrastructure Figures Figure 1 Wastewater Infrastructure Overview... 7 Figure 2 Existing and Planning Wastewater Servicing... 9 Figure 3 Regional Water Infrastructure Overview Figure 4 Existing and Planned Regional Water Servicing Mayfield West Servicing Study 5/26/2009 2:19 PM

3 Town of Caledon Introduction 1.1 General (Burnside) was retained by the Town of Caledon (Town) to prepare a Water and Wastewater Servicing Study (Servicing Study) in support of the Mayfield West Phase 2 Secondary Plan. The Study Area for the Servicing Study is located within the Town of Caledon, and is generally bounded by Highway 10 to the east, Old School Road to the north, Chinguacousy Road to the west and Mayfield Road to the south. The Study Area is approximately 770 hectares (1,900 acres). This Servicing Study is one of several component studies of the Secondary Planning Process and should be read in conjunction with other component studies that include: Comprehensive Environmental Impact Study and Management Plan Commercial Impact Study Noise Impact Assessment Cultural Heritage Survey Agricultural Impact Assessment Transportation Impact Study Commercial Needs Study These studies are intended to support an amendment to the Region of Peel Official Plan to expand the existing Mayfield West settlement boundary as well as to support a local official plan amendment to implement the. The Servicing Study will be completed in two distinct reports referred to as Part A and Part B. 1.2 Study Purpose The Servicing Study is intended to address the following: How the Study Area could be serviced through a logical extension of existing and planned Regional water and wastewater infrastructure; The equivalent population that could be serviced by existing and planned Regional water and wastewater infrastructure; and What, if any, significant downstream or off-site constraints exist that may preclude development within the Study Area. If constraints exist, a strategy will be proposed to address the constraint. This Part A report will describe the existing or planned regional water and wastewater infrastructure in or adjacent to the Study Area and will identify the related wastewater

4 Town of Caledon 2 drainage areas and water pressure zones. The results from the Part A report will not only form the foundation for the Part B analysis and report, but will also be used in the initial preparation of land use scenarios for the Study Area. The Part B report will identify internal servicing options for various land use scenarios taking into consideration potential routing alignments and related watercourse crossings. Part B will also identify key external Regional servicing improvements required to service the Study area, including a high level cost estimate, as well as a recommendation of a servicing scheme for the preferred land use option. The Servicing Study will ultimately identify the major water and wastewater servicing infrastructure required to service the Study Area, taking into consideration the findings of the other component studies. 1.3 Land Uses and Major Features Land use Currently, a majority of the Study Area is used for agricultural purposes. A mix of cash crops, undeveloped meadowland, forest and strip residential severances currently cover the land. Please refer to the Comprehensive Environmental Impact Study and Management Plan as well as the Agricultural Impact Assessment for further details regarding the existing land use. Natural Features The major natural feature within the Study Area is the Etobicoke Creek. In addition, there are smaller watercourses and various pockets of woodlot, meadow and marsh. The Green Belt extends into the Study Area, generally overlapping with the Etobicoke Creek. Please refer to the Comprehensive Environmental Impact Study and Management Plan for extensive details regarding the Natural features located within the Study Area. Watersheds The Study Area is located within two watershed boundaries. The majority of the Study Area is located within the Etobicoke Creek Subwatershed under the jurisdiction of the Toronto and Region Conservation Authority (TRCA), while a small portion to the south is located within the Fletcher s Creek Subwatershed within the jurisdiction of Credit Valley Conservation (CVC). Terrain The Study Area generally falls from north to south, however, the Etobicoke Creek bisects the Study Area in an east-west direction. Elevations within the Study Area range from 259 m above sea level to approximately 266 m above sea level.

5 Town of Caledon 3 Other infrastructure Another major piece of infrastructure located within the Study Area is the railway line running in a north-south direction. Please refer to the Noise Impact Assessment and Transportation Impact Study for further details regarding this existing railway.

6 Town of Caledon Background 2.1 Planning Requirements Located in the southwest part of the Town of Caledon, the Rural Service Centre of Mayfield West is being planned as a compact, well integrated community through a series of phased expansions. These expansions are based on population and employment forecasts contained in Caledon s Official Plan. Future growth of Mayfield West will occur within the Mayfield West Community Development Plan Study Area that is established in Caledon s Official Plan. 2.2 Population Data and Projections Caledon has revised the 2021 population forecast for Mayfield West from 13,100 to 17,000. The population increase of 3,900 has been reallocated from elsewhere in Caledon. Caledon is also proposing to allocate an additional 9,800 population to Mayfield West between 2021 and The location for the additional 3,900 population within the context of the 2021 planning horizon will be confined to the lands west of Highway 10 within the Mayfield West Community Development Plan Study Area. This is outlined in Regional Official Plan Amendment No. 17 (ROPA 17). Further, the 9,800 population increase within the context of the 2031 planning horizon will not be confined to the lands west of Highway 10, but will consider lands on either side of Highway 10 within the planning area. The extent of employment and commercial lands and corresponding employment population has not been defined to date and will be addressed in the Part B report. 2.3 Region of Peel Design Criteria Population forecasts are compared to those anticipated using the Region of Peel Design Criteria Manual. The Region has traditionally used a density of 70 persons per gross hectare for infrastructure planning. This density reflects single and low density multiple family housing, as well as light industrial uses. The maximum sewer capacity is typically rated at 80% of the peak flow rate. The Town population projections are used in the sizing of treatment plant capacities and major trunk infrastructure while the Region design criteria is specific to the design of the collection and distribution systems, to ensure sufficient capacity within these components.

7 Town of Caledon Review of Previous Reports and Studies Various reports, standards and maps either specifically about the Study Area or regarding servicing that includes the Study Area have been completed over the past several years. These documents were reviewed and pertinent information has been incorporated into this Servicing Study. The following documents were considered in the preparation of this Servicing Study: Functional Servicing and Stormwater Management Study for Mayfield West Community in the Town of Caledon, November 2007, David Schaeffer Engineering Ltd. Mayfield West Community Development Plan Study, Existing Water Supply and Sanitary Sewage System, November 1996, CG&S Mayfield West Community Development Plan Study, Water Supply and Sanitary Sewage System Function Servicing, February 1997, CG&S Public Works Design, Specifications and Procedures Manual, Linear Infrastructure, Sanitary Sewer Design Criteria, Region of Peel, September Public Works Design, Specifications and Procedures Manual, Linear Infrastructure, Watermain Design Criteria, Region of Peel, July 2007 Wastewater Servicing Infrastructure Treatment And Trunk Sewer System Development Charges, Region of Peel Water Servicing Infrastructure, Production And Primary Systems Local Distribution Systems Development Charges, Region of Peel Water and Wastewater Master Plan Update, Volume 1, June 2007, KMK and Region of Peel

8 Town of Caledon Sanitary Servicing The Study Area is situated north of the two major South Peel sewer systems. The West system includes treatment at the Clarkson Water Pollution Control Plant (WPCP), major conveyance by the Credit Valley Trunk Sewer and its related subtrunks and local sewers. The East system includes treatment at the Lakeview WPCP, major conveyance by the Etobicoke Creek Trunk Sewer and its related subtrunks and local sewers. Both systems are part of the South Peel Wastewater System. There are several sanitary subtrunks and associated sewers that are either built or under consideration by the Region that may be able to service the Study Area. Typically these sewers are designed to convey a maximum flow that can be defined in terms of population numbers or by serviceable area based on Region design criteria. An overview of Region wastewater infrastructure related to the Study Area is provided on Figure Existing Wastewater Infrastructure The land within the Study Area is not currently serviced with sanitary sewer; however, there are two sewers that exist adjacent to the Study Area. Table 1 Existing Wastewater Infrastructure In Service Location Description Date Existing Vankirk Drive 450mm at Mayfield, draining to Brampton subtrunk (East system) Existing Highwood Drive 300mm at Highway 10, draining to 450mm sewer on Colonel Bertram Road (East system) The existing Vankirk Drive 450mm diameter regional sewer (Outlet #2 on Figure 2) currently terminates just south of Mayfield Road and has spare capacity of 82.4 L/s, enough to service a residential population equivalent of approximately 5,800 people. This sewer was originally constructed to service North Brampton, but has also been designed to incorporate lands that can drain to the sewer, primarily by gravity. There is an existing 300mm diameter local sewer on Highwood Drive (Outlet #3 on Figure 2), terminating just east of Hurontario. It has spare capacity of 68.6 L/s, enough to service a residential population equivalent of approximately 4,400 people. This sewer was originally constructed to service the immediate subdivision to the south within Brampton, but was also designed to incorporate lands to the west that can drain to the sewer, primarily by gravity.

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10 Town of Caledon 8 Therefore, while existing local and regional sewers can service a portion of the Study Area population, an extension of additional regional sewers will be necessary to fully service the Study Area. 4.2 Planned Wastewater Infrastructure The Region of Peel has recently completed updates to the Water and Wastewater Master Servicing Plan (MSP) Update and Development Charges by-law. The Region, through its MSP Update (2007), has identified a strategy for the construction of new wastewater infrastructure within the current regional urban boundary based on projected growth rates and ultimate population estimates up to the year 2031, however, some sewers have been oversized to accommodate lands outside this boundary. The plan incorporates several steps for the major collection system, including the following range of projects that may affect service timing within the Study Area: Expanding treatment capacity at the Lakeview Water Pollution Control Plant Upgrading conveyance capacity in the Etobicoke Creek Trunk Sewer (ECTS) Extending coverage with Sanitary Sub trunk sewers. A review of the Region of Peel 2008 and 2009 Wastewater Servicing Infrastructure Maps were used to identify wastewater infrastructure projects adjacent to the Study Area. The maps illustrate regional development charge sewers which are 375mm in diameter or larger. The in service date represents the expected year of construction completion based on current Region infrastructure plans for the area. Table 2 Planned Wastewater Infrastructure In Service Location Description Date 2011 Future North-South Road 450mm diameter, east of Chinguacousy Road, terminating at Mayfield Road, draining to Fletchers Creek subtrunk (West system) 2008 Kennedy Road 525mm diameter, extension, connecting to Inder Heights subtrunk (East system) Refer to Figure 2 for the location of the planned wastewater outlets for the Study Area. The Future Road 450mm diameter sewer (Outlet #1 on Figure 2), once extended to the south limit of the Study Area, will be designed to have spare capacity of L/s, enough to service a residential population equivalent of approximately 10,500 people. While currently being designed to service lands within the City of Brampton, immediately south of the Study Area, it will also service lands to the north (within the Study Area) that can drain to the sewer, primarily by gravity.

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12 Town of Caledon 10 The Kennedy Road 525mm sewer relates to servicing the Mayfield Phase 1 employment area to the east of Hurontario and does not directly impact servicing capacity to the Study Area. 4.3 Wastewater Infrastructure Summary Based on the existing wastewater infrastructure available, an extension of Regional wastewater infrastructure will be necessary to service the Study Area. Based on the spare sewer capacities of the existing and planned Regional wastewater infrastructure (as described in section 4.1 and 4.2 and illustrated on Figure 2), future residential population growth planned for Mayfield West (as described in section 2.1) can be accommodated. The impact of employment and commercial lands on sewer capacity will be considered in the Part B report.

13 Town of Caledon Water Servicing Brampton, Mississauga and portions of Caledon are serviced with water supplied from Lake Ontario that is treated at one of two Water Treatment Plants (WTP). The Lakeview WTP and Lorne Park WTP, including all pump stations, reservoirs and trunk watermains comprise the South Peel Water System. The Water System is divided into seven (7) pressure zones based on elevation (approximately 30m of elevation change between each zone) and is generally divided into an east and west system along McLaughlin Road. The Study Area is located within the east system, and is generally classified as being within Pressure Zone 7 although an initial investigation indicates that the southern edge of the Study Area is located just within the upper working elevation of Pressure Zone 6. The working elevation range for Zone 7 is between 259m and 289m above seal level. 5.1 Existing Water Infrastructure The Lakeview WTP supplies treated water to the east system. At full capacity the plant is currently rated to treat approximately 330 ML/d. At this time, the 330 ML/d is intended to service all lands within the current region urban boundary and therefore excludes the Study Area at this time. Water is pumped to the Zone 6 North Brampton Reservoir from the Lakeview WTP through a series of intermediate reservoirs and booster stations. There are several reservoirs located near the Study Area. The North Brampton Reservoir is located near the intersection of Mayfield Road and Heart Lake Road. Its low lift pumps service Zone 6. The Snelgrove Elevated Tank provided additional storage for Zone 6 emergency and peak balancing flows and is located near the intersection of Mayfield Road and Cresthaven Road, west of Hurontario Street. There are a number of existing 300mm and 400mm watermain that service the subdivisions located immediately south and east of the Study Area. These areas are generally located within Pressure Zone 6, although some, such as the Valleywood subdivision, do slightly exceed the Pressure Zone 6 maximum elevation range. See Figure 3 for an overview of the Regional water system as it relates to the Study Area. Table 3 Existing local and Regional Water Infrastructure In-Service Location Pressure Description Date Zone Existing Highway mm from Mayfield Road to Snelcrest Drive Existing Mayfield Road 6 400mm from North Brampton Reservoir to Van Kirk Drive Existing Robertson Davies Drive 6 300mm from Mayfield north to Study Limit

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15 Town of Caledon Planned Water Infrastructure The Region, through its MSP Update (2007), has also identified a strategy for the construction of new water infrastructure within the current regional urban boundary based on projected growth rates and ultimate population estimates up to the year The plan incorporates steps for expanding treatment, transmission, storage, and pumping and distribution capacity. A review of the Region of Peel 2008 and 2009 Water Servicing Infrastructure Maps were used to identify water infrastructure projects adjacent to the Study Area. The maps illustrate regional development charge watermain which are 400mm in diameter or larger. The in service date represents the expected year of construction completion based on current Region infrastructure plans for the area. A detailed list of planned water infrastructure relative to the Study Area is provided in Table 4: Table 4 Planned Regional Water Infrastructure In-Service Location Pressure Description Date Zone 2008 Mayfield Road 6 750mm transmission watermain from Kennedy Road to McLaughlin Road 2010 Future Road 7 400mm watermain from Highway 10 to Kennedy Road to distribute water from Mayfield West Elevated Tank 2010 Chinguacousy Road 6 400mm watermain from Wanless Drive to Mayfield Road to service areas south of the Study Area 2013* Mayfield Road 6 750mm transmission main from east of McLaughlin Road to Creditview Road 2009* Caledon 7 Mayfield West Elevated Tank to service the existing Mayfield West settlement 2013* Caledon 6 Reservoir and Pump Station 2013* Dixie Road mm Transmission main from North Brampton Reservoir to new Zone 6 Reservoir 2014* Creditview and 5,6,7 Alloa Reservoir and Pump Station Mayfield Road 2020* Dixie Road 7 750mm Transmission main from Zone 6 Reservoir to Zone 7 Reservoir 2020* Caledon 7 Reservoir and Pump Station *In service dates revised based on comments from Region of Peel

16 Town of Caledon 14 Refer to Figure 4 for the potential water connection points for the Study Area as well as the pressure zone boundary delineation. The Region has indicated that the Mayfield West elevated tank is designed to service the Mayfield West Secondary Plan (Phase 1) area located east of Hurontario Street. 5.3 Water Infrastructure Summary Based on the existing water infrastructure available, an expansion and extension of Regional water infrastructure will be necessary to service the Study Area. As the majority of the Study Area is located within Pressure Zone 7, servicing will be dependent on either Zone 7 high lift pumps at the existing North Brampton Reservoir and/or from the planned Alloa Reservoir, or by a supply from a new reservoir and pump station or a combination thereof. Water modelling done in support of the Part B Report will examine these options.

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18 Town of Caledon Conclusions The Servicing Study is intended to address the following: How the Study Area could be serviced through a logical extension of existing and planned Regional water and wastewater infrastructure; The equivalent population that could be serviced by existing and planned Regional water and wastewater infrastructure; and What, if any, significant downstream or off-site constraints exist that may preclude development within the Study Area. If constraints exist, a strategy will be proposed to address the constraint. Based on this Part A Report and a review of the materials available, the following conclusions can be made: Based on the existing wastewater infrastructure available, an extension of Regional wastewater infrastructure will be necessary to service the Study Area. Based on the spare sewer capacities of the existing and planned Regional wastewater infrastructure (as described in section 4.1 and 4.2 and illustrated on Figure 2), future residential population growth planned for Mayfield West (as described in section 2.1) could be accommodated. Based on the existing water infrastructure available, an expansion and extension of Regional water infrastructure will be necessary to service the Study Area. As the majority of the Study Area is located within Pressure Zone 7, servicing will be dependent on either Zone 7 high lift pumps at the existing North Brampton Reservoir and/or from the planned Alloa Reservoir, or by a supply from a new reservoir and pump station or combination thereof. The Part B report will provide further analysis, conclusions and recommendations regarding issues that may effect servicing (and timing) of the Study Area. Prepared by, R.J. Burnside & Associates Limited Dave Kesler, P.Eng. Project Manager DK/jtj Mayfield West Servicing Study 5/26/2009 2:19 PM