City of Toronto Waterfront Sanitary Servicing Master Plan 2017

City of Toronto

Waterfront Sanitary Servicing Master Plan 2017

Alternatives Review Update

September 29, 2017

WSSMP email corresp w JuliusGombos Oct2017 PAGE 5 of 24WSSMP consultation with WaterfrontToronto Aug-Oct 2017 PAGE 29 of 48

WSSMP 2017: Study Area

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WSSMP 2017: Updated Alternatives

Slide 3

Do Nothing, Alternatives 1, 2 , 3 and 4

Do Nothing is required to satisfy EA requirements

Alternatives 1, 2 and 3 are based on pumping to the interconnects (Scott-Victoria and Carlaw Avenue)

Alternative 4 is a interceptor tunnel alternative

Updated Alternatives have been derived from Alternatives 6, 7, 8 and

9 presented at the July 27th meeting following consultation with

Waterfront Toronto (August 9th), and a review meeting with TW and

ECS staff on September 14th and 18th. September 25th review

meeting led to a further update to alternatives and presentation.


“Do Nothing”

• Will not meet wastewater servicing needs of the Toronto Waterfront service area.

• Will increase combined sewer overflow amounts with development.

• More complex operation to maintain control of the system.

• Incomplete alternative.

Slide 4


Alternative 1:Upgrade Scott SPS, Scott St. Bypass, New Port Lands SPS

Upgrade existing 350m of 600-mm with new 900-mm san sewer along Yonge Street.

New Port Lands SPS at 545 Commissioners Street (977 L/s).

Forcemains up Carlaw to interconnect at Eastern Ave.

New Port Lands collector sewers.

Lower Jarvis UpgradeInstall bypass pipe around Scott St SPS.

Upgrade Scott St SPS pumps to 990 L/s firm capacity.

No change at Skydome, Simcoe or Cherry St. SPSs.

Slide 5


Alternative 2: Scott St. Bypass, New LYP SPS, New Port Lands SPS

New LYP SPS (830 L/s) at Harbour/Freeland with forcemain north to Scott-Victoria inter-connect.

Harbour Street connection diverting flow to new SPS away from Scott St. SPS.

Install bypass pipe around Scott St SPS.

No change at Skydome, Simcoe or Cherry St. SPSs.

Lower Jarvis Upgrade New Port Lands SPS at 545 Commissioners Street (977 L/s).



Slide 6


Bypass ConduitConstruct new conduit (900 mm sewer) from

Scott/Esplanade intersection, to divert flow around

pumping station to the MTI.

Southern terminus of 1500-mm Scott-Victoria

inter-connecting sewer to MTI:Pipe invert 69.0 m

Scott St SPS: Existing influent sewer to Scott

Street SPS has invert 70.0 m.

Wet well operating levels 70.3 – 71.5 m.

Data from MTI at Victoria St, Nov 27, 2015 to Aug 29, 2017: level is below 70.0 m 99.94% of the time (exceeded during 7.7 hrs in 641 days)

Alternative 1 and 2: Scott St. Bypass


Alternative 3: Decom Scott SPS, New LYP SPS, New Port Lands SPS

New LYP SPS (1,040 L/s) at Harbour Street and Freeland.

Forcemain up Yonge Street to The Esplanade to Scott Street, to south end of Scott-Victoria interconnect.

New gravity 900-mm san sewer along Esplanade, Yonge Street and Harbour Street.

Decommission Scott St SPS.No change at Skydome, Simcoe or Cherry St. SPSs

Lower Jarvis Upgrade New Port Lands SPS at 545 Commissioners Street (977 L/s).



Slide 8


Alternative 4: New Wastewater Interceptor Tunnel

Shaft at Rees Street (common shaft with future WWF tunnel)

New 900-mm sewer down Yonge to drop shaft connection in Lower Yonge Precinct

Drop shaft connection at Lakeshore/Carlaw to take flow from new Port Lands collector sewer

Pumping facility immediately west of IPS site.

Construction shafts on either side of “buried valley” - Keating rail Yard, and City property at Cherry/Lakeshore

Short Term servicing:

New sewer Commissioners Street to SPS from Don Lands (Don Lands, Unilever)

New Port Lands SPS (550 L/s) at 545 Commissioners Street.

Forcemain to existing sewer up Carlaw Ave. to inter-connect

Short Term servicing:

New sewer Commissioners Street to SPS from Don Lands (Don Lands, Unilever)

New Port Lands SPS (550 L/s) at 545 Commissioners Street.

Forcemain to existing sewer up Carlaw Ave. to inter-connect

Short Term servicing for Scott St SPS / LYP service area: • Lower Jarvis Upgrade• Scott St. SPS Bypass• Upgrade Scott St. SPS equipment to 990 L/s• New sewer up Yonge Street

Short Term servicing for Scott St SPS / LYP service area: • Lower Jarvis Upgrade• Scott St. SPS Bypass• Upgrade Scott St. SPS equipment to 990 L/s• New sewer up Yonge Street


Slide 9


Alternative 4: Tunnel connectivity at ABTP

Slide 10

2.4-m Interceptor Tunnel alignment along Lakeshore Blvd., and Inner Harbour Wet Weather Flow Tunnel, invert approx. 51 m or lower

Construction shaft and pump station (2,240 L/s). Flow pumped ultimately to future MTI/LLI tunnel and/or HLI tunnel.

Direct connection of wastewater tunnel to MTI/LLI tunnel possible to allow for gravity operation if operating levels at MTI/LLI pump group are low enough (i.e. if target operating liquid level of 62.0 m is reliably achieved in future)

Connection to MTI/LLI tunnel situated immediately south of Lakeshore Blvd.

Invert of MTI/LLI tunnel at this location is approximately elevation 55 m.

P


Alternatives Evaluation

Slide 11

• Same methodology as in 2012 Class EA: scoring by criteria.

• Evaluation criteria set expanded to better address pressing servicing requirements, system resilience and adaptability

Criteria Do Nothing

Alternative 1

Central 1 + Port Lands

Alternative 2


Alternative 3


Alternative 4

Interceptor Tunnel

1 CULTURAL ENVIRONMENT 10 6 6 6 6

2 NATURAL ENVIRONMENT 8 12 12 12 12

3SOCIO-ECONOMIC ENVIRONMENT 11 11 7 7 11

4SERVICING NEW DEVELOPMENT 3 7 11 11 13

5 SUSTAINABILITY 2 4 6 6 10

6 TECHNICAL CONSIDERATIONS 14 16 16 18 24

TOTAL 48 56 58 60 76


Alternatives Evaluation

Slide 12

Financial

Costs

Alternative 1


Alternative 2


Alternative 3


Alternative 4

Interceptor Tunnel

Capital Costs $84,800,000 $102,900,000 $111,600,000 $234,300,000

Annual O&M Costs $770,000 $810,000 $840,000 $240,000

Life Cycle Costs (NPV)

$214,100,000 $227,000,000 $239,900,000 $290,600,000

Alternative 4 has the “highest” Technical score, at the “highest” cost.

Alternative 1, 2 and 3 have comparable scores, with Alternative 1 having the lowest cost.

Still need to add cost of PL SPS


Alternative 4: Implementation Timeline

Slide 13

Timeline EA 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028

Alternative 4 - Interceptor Tunnel

Interceptor Tunnel B Planning Design Construction In-Service

Terminus SPS B Planning Design Construction In-Service

Consolidation Sewers A+/B Planning Design Construction In-Service

Decommission SPSs

Short-Term Infrastructure

Scott Street I/I Initiative A+ Ongoing(Potential 100 L/s capacity restored)

Lower Jarvis Pipe upgrade A+ Design In-Service

Scott Street by-pass A+ Design In-Service

Yonge Street upgrade A+ Design In-Service

Scott Street SPS upgrade to 990 L/s

A+ Design In-Service

Port Lands SPS (550 L/s) MESP Design In-Service

Construction of Interceptor Tunnel can be deferred with Short-Term Servicing

Scott Street SPS, Lower Yonge Precinct, Don Lands, Unilever and Port Lands immediate capacity needs met with Short-Term Infrastructure

Alternative 4

Implementation requires short-term infrastructure to meet immediate capacity needs.

Short-Term infrastructure requirements effectively the same as Alternative 1.



• Implementation of Interceptor Tunnel cannot be completed and in-service to meet short term servicing needs.

• Short-Term Infrastructure requirements in Scott Street SPS, Lower Yonge Precinct, Don Lands, Unilever and Port Lands will meet infrastructure/capacity needs.

• Short-Term infrastructure required is effectively the same as Alternative 1.

• Interceptor Tunnel planning, design and construction can be complete before capacity is required.

Slide 14


Alternative 4: Other Considerations

Approvals: Class EA Master Plan once complete will allow projects to proceed.

Design/Construction:

• Interceptor Tunnel shaft locations and alignment consistent with Inner Harbour Wet Weather Tunnel.

• More investigation and consultation around shaft sites and routing required as part of planning/pre-design.

• Need to coordinate with other Toronto Water projects (IPS and WWF tunnel design and construction).

• O&M cost saving possible through future gravity operation, pump group still required.

• Presents future possibilities such as westward extension to Strachan and Sunnyside SPSs.

Slide 15


Timeline EA 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028

Alternative 1 – Upgrade Scott SPS, Scott St. Bypass, New Port Lands SPS

Scott Street I/I Initiative A+ Ongoing(Potential 100 L/s capacity restored)

Lower Jarvis Pipe upgrade A+ Design In-Service

Scott Street by-pass A+ Design In-Service

Yonge Street upgrade A+ Design In-Service

Scott Street SPS upgrade to 990 L/s

A+ Design In-Service

Port Lands SPS (550 L/s initial stage)

MESP Design In-Service Future expansion to ultimate 997 L/s


Slide 16

Alternative 1

Implementation addresses short-term needs.

Future expansion of Port Lands SPS would be required and can be timed with growth.

Alternative does not preclude the Alternative 4 servicing strategy.


Alternative 1: Other Considerations

Approvals: Class EA Master Plan once complete will allow projects to proceed.

Design/Construction:

• Implementation timeline will meet capacity requirements.

• Scott Street Bypass, Lower Jarvis Upgrade and Yonge Street Upgrade the highest priorities.

• Yonge St. Upgrade will have traffic and utility impacts.

• Scott Street area I/I reduction program initiated. Success of program may delay the need for Scott St. SPS upgrade.

• Ports Lands SPS timing needs to be coordinated with Lower Don Lands/Unilever and flood protection work.

• Avoids need for design/construction coordination with IPS and WWF tunnel project.

Slide 17


Conclusion

Alternative 1 is the Preferred Alternative:

• Substantially lower capital cost.

• Independent servicing strategy for Scott St. SPS service area. Bypass to Scott-Victoria inter-connection will allow for gravity operation the majority of time.

• Independent servicing strategy for Port Lands can be implemented to meet servicing demand from Lower Don Lands and Unilever lands. Port Lands SPS capacity would be staged.

• Potentially the best approach to making future use of MTI via gravity conveyance by interconnecting sewers, once IPS and WWF tunnel system in place.

• Does not preclude future consideration of Alternative 4.

Slide 18


Markham Mississauga Niagara Durham Oakville Kitchener Hamilton Peterborough

www.ColeEngineering.ca

Slide 19


Please join us at the Public Drop-in Event to learn about a study to update the City’s Waterfront Sanitary Servicing Master Plan (2012) and the recommended strategy to provide sanitary servicing for ongoing and future development along the City’s waterfront. At the drop-in event, you will have the opportunity to view display boards, speak with study team members, and provide input on the recommended sanitary servicing strategy. Details are as follows:

Date: Monday, October 30, 2017Time: 6:00 pm to 8:00 pmLocation: Metro Hall – Room 308 55 John St. (King Street West at John Street)

Study OverviewIn 2012, the City of Toronto completed the Waterfront Sanitary Servicing Master Plan Class Environmental Assessment (EA), which identified a preferred strategy to provide sanitary servicing for development along Toronto’s central waterfront to 2031.

The City is undertaking an EA study to update the 2012 Master Plan. This EA study will identify a new preferred sanitary servicing strategy for the central waterfront, taking into consideration the strong development growth along the waterfront, updated sanitary servicing needs, and projects from completed studies (e.g. Don River and Central Waterfront Wet Weather Flow System, the Integrated Pumping Station, Servicing Report for Lower Don Lands and Port Lands) that offer an opportunity to integrate infrastructure.

The ProcessThe Study is being undertaken following the Master Planning provisions as set out in the Municipal Class EA document (amended in 2007, 2011 and 2015). The Master Planning process involves identifying the problem/opportunity, developing and evaluating alternative solutions, and recommending a preferred solution.

We would like to hear from youPublic consultation is an important part of this study. If you would like more information, or would like be placed on the study mailing list for future updates, please contact:

Mae LeePublic Consultation UnitCity of Toronto, Metro Hall, 19th Fl., 55 John St.Toronto, ON M5V 3C6 Tel: 416-392-8210 Fax: 416-392-2974 TTY: 416-338-0889Email: [email protected]: toronto.ca/wfsanplan

Issue Date: October 12, 2017

The City of Toronto holds public consultations as one way to engage residents in the life of their city. Toronto thrives on your great ideas and actions. We invite you to get involved.

Information will be collected in accordance with the Municipal Freedom of Information and Protection of Privacy Act. With the exception of personal information, all comments will become part of the public record.

Waterfront Sanitary Servicing Master Plan UpdateMunicipal Class Environmental Assessment StudyNotice of Public Information Drop-in Event


Toronto Waterfront Sanitary Servicing Master Plan Class EAPUBLIC INFORMATION EVENT (PIE), October 30, 2017 at Metro Hall

The following items are included herein to document the PIE of October 30, 2017

1/ Notice of meeting

2/ Public Consultation Summary report on the meeting, including notes on comments received from attendees.

3/ Print of information panels that were on display during the PIE

Please join us at the Public Drop-in Event to learn about a study to update the City’s Waterfront Sanitary Servicing Master Plan (2012) and the recommended strategy to provide sanitary servicing for ongoing and future development along the City’s waterfront. At the drop-in event, you will have the opportunity to view display boards, speak with study team members, and provide input on the recommended sanitary servicing strategy. Details are as follows:

Date: Monday, October 30, 2017Time: 6:00 pm to 8:00 pmLocation: Metro Hall – Room 308 55 John St. (King Street West at John Street)

Study OverviewIn 2012, the City of Toronto completed the Waterfront Sanitary Servicing Master Plan Class Environmental Assessment (EA), which identified a preferred strategy to provide sanitary servicing for development along Toronto’s central waterfront to 2031.

The City is undertaking an EA study to update the 2012 Master Plan. This EA study will identify a new preferred sanitary servicing strategy for the central waterfront, taking into consideration the strong development growth along the waterfront, updated sanitary servicing needs, and projects from completed studies (e.g. Don River and Central Waterfront Wet Weather Flow System, the Integrated Pumping Station, Servicing Report for Lower Don Lands and Port Lands) that offer an opportunity to integrate infrastructure.

The ProcessThe Study is being undertaken following the Master Planning provisions as set out in the Municipal Class EA document (amended in 2007, 2011 and 2015). The Master Planning process involves identifying the problem/opportunity, developing and evaluating alternative solutions, and recommending a preferred solution.

We would like to hear from youPublic consultation is an important part of this study. If you would like more information, or would like be placed on the study mailing list for future updates, please contact:

Mae LeePublic Consultation UnitCity of Toronto, Metro Hall, 19th Fl., 55 John St.Toronto, ON M5V 3C6 Tel: 416-392-8210 Fax: 416-392-2974 TTY: 416-338-0889Email: [email protected]: toronto.ca/wfsanplan

Issue Date: October 12, 2017

The City of Toronto holds public consultations as one way to engage residents in the life of their city. Toronto thrives on your great ideas and actions. We invite you to get involved.

Information will be collected in accordance with the Municipal Freedom of Information and Protection of Privacy Act. With the exception of personal information, all comments will become part of the public record.

Waterfront Sanitary Servicing Master Plan UpdateMunicipal Class Environmental Assessment StudyNotice of Public Information Drop-in Event

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Waterfront Sanitary Servicing Master Plan UPDATE

Environmental Assessment Study

Public Consultation Summary – November 2017

Public Information Drop-in Event

Background The City of Toronto is undertaking a study to update the City's Waterfront Sanitary Servicing Master Plan Class Environmental Assessment (EA) Study. The 2012 Waterfront Sanitary Servicing Master Plan is being updated to ensure that the necessary infrastructure will be in place to provide sanitary servicing for development along the waterfront to 2041 (See Study Area Map).

The Master Plan Update Study involves the review and updating of the recommended servicing strategy from the 2012 Master Plan, taking into consideration the strong development growth along the waterfront, updated sanitary servicing needs, and projects from completed EA studies (e.g. Don River and Central Waterfront Wet Weather Flow

System, the Integrated Pumping Station, Servicing Report for Lower Don Lands and Port

Lands) that offer an opportunity to integrate infrastructure.

Overview of Public Information Drop-in Event The Study Update Public Information Drop-in Event (PIE) was held on Monday, October 30, 2017 from 6:00pm to 8:00pm at Metro Hall, 55 John Street. Approximately 25 members of the public at the event and were invited to view the display panels and speak one-on-one with project team members. The purpose of the PIE was to:

Review the study purpose and process Present details of alternative solutions for Waterfront Sanitary Servicing Update Present the preliminary preferred solution Obtain community feedback on the recommended solutions Outline the next steps in the study process

The City and project team staff in attendance at the meeting included:

Kenny Ching, Senior Engineer, Engineering & Construction Services (ECS) Samantha Fraser, Manager, ECS Bill De Angelis, Director, ECS Grace Lin, Sr. Engineer, Toronto Water, Sewer Asset Planning Jian Lei, Manager, Toronto Water, Sewer Asset Planning Mae Lee, Public Consultation

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Anne Marie Croce, Public Consultation Phil Gray, Cole Engineering Harold Chard, Cole Engineering

Public attendance: Pinnacle International, Tridel, Greenland Corp, R.V. Anderson Associates, WSP Consultants, Stantec Consultants, Cole Engineering, Urban Fishing Ambassador A copy of all presentation material is available on the City of Toronto project website at: www.toronto.ca/wfsanplan Communication/Notification Overview

Notice of PIE advertised in the NOW Magazine on October 12 & 19, 2017 Over 300 email blast of the notice to project contact database, previously involved

stakeholders, new waterfront condos and Business Improvement Areas. Key stakeholders included: waterfront condo boards/property management,

developers and their consultants and lawyers, waterfront condo residents The notice was emailed to local City Councillors for Wards 20, 28 & 30 (Pam

McConnell's Office, Joe Cressy and Paula Fletcher). To date, there have been 1 formal comment received in addition to verbal comments

at PIE. Identification of Potential Issues Potential issues with the messaging of this project are expected to be minimal. It is likely that there will be some opposition from the York Quay Neighbourhood Association (Owners Board members) and other neighbourhood associations along Queens Quay who may have concerns about:

- the project construction impacts on the revitalization of Queens Quay, - potential odours with any sanitary infrastructure - visual impacts of above ground infrastructure at locations along Queens Quay - timing of the project, and - whether the project will facilitate more development and intensification along the

waterfront

Identification and Role of Stakeholders All residents and stakeholders within a defined study area will be engaged through advertisements in local papers (NOW Magazine), and notices mailed by Canada Post to identified stakeholders including those that were involved previously during 2011 – 2012 period. This study area is bounded by Bathurst Street, Front Street and Eastern Avenue, Leslie St/Coxwell Ave, and Lake Ontario. A map of the Study Area is attached.

In addition to the project team/TAC, a list of internal and external stakeholders will also be engaged throughout the consultation process. Below is a preliminary list that will be vetted and expanded upon by the project team and local Councillors as the project moves forward.

http://www.toronto.ca/wfsanplan

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Internal stakeholders:

Councillor Joe Cressy (Ward 20 – Trinity Spadina) Councillor Pam McConnell's Office (Ward 28 – Deputy Mayor for Downtown area) Councillor Fletcher (Ward 30 – Toronto Danforth) Councillor Mary Margaret McMahon (Ward 32 – Public Works and Infrastructure

Committee Vice Chair) City Planning (Community Planning, Strategic Initiatives & Heritage Preservation) Engineering and Construction Services (Development Engineering/Linear/Design) Parks, Forestry and Recreation (Toronto Water rep – Eric Stadnyk) Toronto Water (Wastewater, Operational Efficiency & Support, WIM) Transportation Services (Infrastructure Asset Management) Waterfront Secretariat

External Agencies:

Department of Fisheries and Oceans Environment Canada GO Transit Ministry of Citizenship, Culture, Tourism and Recreation Ministry of Energy and Infrastructure Ministry of Environment & Climate Change Ministry of Municipal Affairs and Housing Ministry of Natural Resources Ministry of Transportation Toronto District School Board Toronto Region Conservation Authority Toronto Transit Commission Utilities

o Toronto Hydro, Hydro One, Rogers, Bell, Telus, Enbridge, Pipelines Waterfront Toronto

Community Stakeholders

Bathurst Quay Neighbourhood Association Central Waterfront Neighbourhood Association Development Community Entertainment District BIA Friends of the Spit Gooderham & Worts Neighbourhood Association Harbour Square Condominium Association Harbourfront Residents' Association Harbourfront Community Association Lakeside Area Neighbourhood Association Leslieville Residents' Association MTCC 949 (77/99 Harbour Square)

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Port Lands Action Committee South Riverdale Neighbourhood Association St. Lawrence Market Neighbourhood BIA St. Lawrence Neighbourhood Association The Waterfront BIA West Donlands Committee YCC 288 (33 Harbour Square) YCC 510 (55/65 Harbour Square) York Quay Neighbourhood Association Del Condo Icon Property Management Tridel Managment Riviera Condo Brookfield Management Oxford Properties Cadillac Fairview Management Menkes The Pinnacle First Gulf

Consultation with First Nations will also be undertaken according to Consultation with

Canada’s Aboriginal People under MOECC 2015 guidelines. These consultations have engaged:

Indian and Northern Affairs Canada Ontario Secretariat for Aboriginal Affairs Mississaugas of the New Credit First Nation Curve Lake First Nations

Alderville First Nation

Hiawatha First Nation Kawartha Nishnawbe First Nation Mississaugas of Scugog Island First Nation Archaeological Resources (internal) Diversity Management (internal)

Next Steps Following this PIE, the project team will review and consider all comments in the recommended solutions. The study update is expected to complete in 2017. The Notice of Study Completion including the 30-day public review will be advertised in the NOW Magazine and past stakeholders notified.

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Summary of Participant Feedback At this PIE, participants were able to provide feedback by completing a feedback form or email comments to the City. One formal comment received. Issues

Responses Follow-Up Required?

First Gulf: First Gulf has submitted applications for Official Plan Amendment (“OPA”), Rezoning, and Subdivision Approval for the lands we own in the area known as East Harbour, including 21 Don Roadway, 30 Booth Avenue, 375-385 Eastern Avenue, and 415 Eastern Avenue. Our OPA application was submitted in 2015 on the basis of a vision for a major new transit-focused employment precinct, with a 2016 Rezoning and Subdivision Approval application providing further detail on the proposal to accommodate approximately 50,000 new jobs, as well as complementary retail, entertainment, cultural and associated uses. We did not receive substantive comments from Toronto Water on the materials submitted in support of our 2016 municipal approvals submission. We were advised that Toronto Water was undertaking the Update, which was anticipated to be complete in summer 2017. On the basis of discussions over summer 2017, it was our understanding that a new municipal sanitary pumping station location was being reviewed for the Port Lands. On behalf of First Gulf and Waterfront Toronto, WSP submitted a

Yes

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memo recommending a more central Port Lands location along Commissioners Street for this new pumping station. This is farther west than the location that has since been identified by the City in the PIE material. WSP’s recommended location is expected to be more cost effective, and easier to implement from a timing perspective relative to the timing of the East Harbour and the Lower Don Naturalization. Knowing that the Update was ongoing, our team prepared an update to the Functional Servicing Report (FSR) submitted in support of our applications, on the basis of discussion between our consultant team, the City of Toronto (including Toronto Water), and Waterfront Toronto. This update was submitted on October 10, 2017, in advance of issuance of the recent PIE materials. The FSR update provided three different options for servicing the lands, to demonstrate how the site can be serviced depending on the timing of resolution of ongoing work by the City. The sanitary drainage from East Harbour is ultimately intended to outlet to the waterfront master plan sanitary system. However, two of the options in the FSR identify how to proceed on the basis of existing infrastructure, in the event that East Harbour development is ready to proceed in advance of completion of necessary City-led work. Our primary concerns with the preferred option identified in the PIE material are timing and coordination with respect to both the City’s decision-

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making process and implementation. East Harbour is targeting early 2018 for rezoning and first commercial occupancy in 2023. Timely comments on our applications, coordination of assumptions and approach, and construction coordination are critical to ensuring that our project can proceed in a reasonable timeframe. This includes the ability to confirm the servicing approach for East Harbour and to proceed with construction as planned. We note that it is our understanding that any preferred option for the type and location of infrastructure emerging from the Update will be financed through development charges, and we expect that the City will factor this in to the upcoming DC by-law review process. We are keen to discuss these issues with the City and to work towards a resolution, particularly as we near the anticipated end of our rezoning process. Pinnacle International: What you heard at PIE??

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Study Area Map

Ih TORONTO Michael DAndreaChief EngineerEngineering and Construction Services

John Livey Engineering and Construction Reply to: Bill De Angelis, P.Eng, MBADeputy City Manager Services Director, Design and Construction55 John Street Major InfrastructureMetro Hall, 7th Floor Tel: (416) 395-6270Toronto, Ontario M5V 3C6 Fax: (416) 392-4426

TTY: (416) 338-0889E-mail: Bill.deAngelistoronto.ca

To: Waterfront Developers

From: Bill De Angelis, DirectorDesign & Construction, Major Infrastructure

Date: January 16, 2018

Subject: 2017 WSSMP EA Proposed Serving Strategy - Port Lands

1.0 Purpose /ScopeThe purpose of this memorandum is to address concerns raised by representatives of propertydevelopers during consultation meetings held as part of the City’s Waterfront Sanitary ServicingMaster Plan (WSSMP) EA Update. The primary concern expressed is whether the proposedservicing strategy to address future development in the Port Lands, Lower Don Lands and EastHarbour development precincts will be adequate in the long term if future service populations(employment or residential) exceed what is currently being estimated as the “full build-out”scenario.

As well, this memorandum raises the City’s concerns regarding the practice of discharginggroundwater from building foundation drainage systems, into the sanitary sewer system.

2.0 WSSMP Preferred Alternative: Providing Additional Capacity

The City’s response to the concern about future capacity is that there is opportunity through finaldesign of the recommended works, to build in additional servicing capacity. In effect, therecommended strategy is comprised of infrastructure components that provide some“scalability” of the proposed strategy.

For the Port Lands, Lower Don Lands and East Harbour development areas, in the WSSMPpreferred alternative (ALTERNATIVE #1) there are two infrastructure components that need tobe considered if we want to build in additional capacity beyond what is required for the current“full build-out” scenario. These two components are:

1. The new sewage pumping station (Port Lands SPS) at 545 Commissioners Street.2. The new collector sewer along Commissioners Street from Don Roadway to 545

Commissioners Street.

2.1 Port Lands SPS:

Any new pumping station is designed such that pumping capacity can be increased over time asdevelopment comes on line. This is accomplished by adding new pumps or increasing pump

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sizes when required. The pumping station will be equipped with flow metering equipment sothat trends in sewage flows over time can be tracked by the City and decisions can be madeabout when more pumps need to be added.

At the initial design of the station is important to make the structural elements large enough toaccommodate as many pumps and associated piping/electrical/control equipment as mightconceivably be required at some time in the future. This would affect primarily the size ofunderground concrete structures that comprise the stations “wet well” that receives the incomingflow, and the “dry well” which houses the pumps and associated piping. Also the size of theabove-grade control building could be affected.

In the case of the proposed Port Lands SPS at 545 Commissioners Street, the WSSMPestimate of required ultimate station capacity is 977 L/s. This value has been based on applyinga wastewater generation rate of 450 L/cap/day for all the estimated as the “full build-out”employment and residential population which is peaked with the Harmon Factor plus anextraneous flow allowance of 0.26 L/s/ha. This is a very generous and arguably conservativeflow value to use for station design. Actual flows at existing City pumping stations, to ourknowledge, are typically below 300 L/cap/day. As an example, data from Scott Street SPSindicates per-capita flows around 200 L/cap/day.

Therefore, the proposed design for pumping capacity of 977 L/s effectively builds inconsiderable extra capacity; it is very possible that the design capacity would provide capacityfor substantially more population than defined by our current full build-out scenario (roughly 50%more if pumping capacity were to be based on a unit flow of 300 L/cap/day).

The ultimate capacity potential is a final design consideration. When proceeding with finaldesign, the City can, at its discretion, require that the station structure be designed to becapable of accommodating enough pumps to achieve considerably more than the currentestimate of “full build-out” would require. However, at this time it is difficult to justify sizing thePort Lands SPS for substantially more than 977 L/s. At this stage of the WSMMP, the size ofthe Port Lands SPS has been based on generous flow allowances and can be increased ifdesigned in a modular thoughtful fashion.

Funding for this project is to be determined.

2.2 New Collector Sewer along Commissioners Street:

The WSSMP preliminary sizing (based again on 450 L/capita/day, Harmon Peaking, extraneousflow allowance) indicates required pipe size of 675-mm at Don Roadway, increasing to 900-mmat Bouchette Street and then to 975-mm at Carlaw Avenue to 545 Commissioners (design flow870 L/s). Pipe size increases at Bouchette Street as this is what has been assumed would bethe approximate connection location for a sewer coming from the East Harbour developmentarea (previously referred to during the WSMMP as “the Unilever lands”).

The sewer would be deep (approximately 9 to 10 m below surlace grade) to ensure it couldprovide outlet under the new Don River channel for gravity sewers from Lower Don Lands. TheWSSMP’s estimated capital cost is based on sewer construction being by micro-tunneling,assuming a 1.2-rn bore diameter along the entire length.

The sewer is expected to have a service life of at least 100-years, and unlike the pumpingstation, cannot be scaled up once it’s built. For this reason it important to size the

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Commissioners Street sanitary sewer appropriately leading to the Port Lands SPS. From an EAperspective, whether the size is 900, 1200 or 1500-mm is not relevant, meaning no amendmentwould be required if the pipe size increased. As well, the additional cost of increasing the pipesize by one or two diameters would be at a marginal cost. Funding for this project is to bedetermined.

2.3 Class EA:

The 2017 WSSMP EA will not require an addendum to increase the Port Lands SPS capacity orthe Commissioner’s Street sanitary sewer because of additional growth. The current documentdoes not discuss future growth scenarios other than what has been lately provided by the City’sPlanning in March 2017.

Presently, the City is aiming to submit the EA Draft Report to the MOECC by the end of January2018, filing a Notice of Completion and allowing for 30-day public review and comment period.Once the EA is complete, the City will move forward to develop a timeline that is coordinatedwith key stakeholders to complete the projects identified.

3.0 Groundwater Discharge Into the City’s Sanitary Sewers

3.1 City’s ConcernThe City is concerned that available sanitary sewer pipe capacity and pumping capacity is beingneedlessly reduced by the practice of discharging flow collected by building foundation drainagesystems (i.e. groundwater) into sanitary sewer service connections and thence into themunicipal sanitary sewer system. To the City’s knowledge, this practice is being applied as atemporary measure at some building sites, or is being used as a permanent measure. This is aparticular concern in the City’s central waterfront area due to current limitations on servicingcapacity and the fact that, because of low elevation relative to the Lake, many buildingstructures require continuous foundation dewatering.

Per City design guidelines, sanitary sewers are designed to include an extraneous inflowallowance of 0.26 L!s per hectare of service area. This allowance is intended to account forleakage of groundwater into the sanitary sewer system through pipe/manhole joints, and directsurface inflow through manhole lids. It is not intended to allow for the considerable inflow thatcan result from building foundation dewatering. This practice effectively goes against theMOECC and City sewer design guidelines, and therefore uses up allocated capacity for growth.

3.2 City’s RequirementsTherefore, to support any application for property development, the City ECS and TorontoWater will require that the applicant or development proponent provide the following supportinginformation with the development application:

1.0 Detailed description of proposed foundation dewatering systems to be used on the site,temporarily (i.e. during site development) and permanently.

2.0 Assessment of options for disposing of foundation dewatering water. This assessmentmust consider all feasible options for the site, and must place focus on minimizing anyneed to dispose of such water into the municipal sanitary sewer system.

3.0 If it is proposed to use the sanitary sewer system, then the applicant must provide

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4.0 information to demonstrate that the proposed discharge will comply with the City’ssewer-use bylaw; and

5.0 The applicant must provide supporting technical information on the impact of suchdischarge on downstream sanitary sewer system and pumping capacity utilization, anddemonstrate to the City’s satisfaction that new and existing sewers and downstreampumping stations have adequate capacity, with due consideration to capacity allocationsassigned to other properties. Such supporting technical analyses may need to includedownstream sewer flow monitoring to characterize existing capacity utilization, or othertechnical analyses that the City may require as determined through the developmentapplication review process.

Please feel free to contact Mae Lee of Public Consultation Unit should you require moreinformation. She can be reached at maeJeetoronto.ca or 416-392-8210.

Yours sincerely,

1te Th/4jr’tBill DeAngelis, P.Eng., MBADirector, Design & Construction, Major InfrastructureEngineering & Construction Services

cc: Graham Harding, Toronto Water Infrastructure, DirectorJian Lei, Toronto Water, Sewer Asset Planning, ManagerGrace Lin, Toronto Water, Sewer Asset Planning, Senior EngineerSamantha Fraser, Engineering & Construction Services, Don and Central Waterfront,ManagerKenny Ching, Engineering & Construction Services, Engineer

Attachment:

loronto at your service

City of Toronto Waterfront Sanitary Servicing Master Plan 2017

Documents

Transcript of City of Toronto Waterfront Sanitary Servicing Master Plan 2017