German Mills Settlers Park Sanitary Infrastructure Protection Project

Toronto and Region Conservation Authority (TRCA) in partnership with the Regional Municipality of York (York Region) has proposed to undertake municipal infrastructure protection works within German Mills Settlers Park in order to provide long-term protection to at-risk sanitary sewer infrastructure. 

Current News:

A Public Information Centre meeting was held on May 29, 2018 and the 30 day public consultation review period for the German Mills Settlers Park Sanitary Infrastructure Protection Project has now ended. The Project File and Notice of Completion is currently being drafted and will be made available to the public in late summer 2018. TRCA thanks all individuals who submitted a Public Consultation Comment Form and welcomes any additional questions or concerns regarding the project. 

Project Location

German Mills Settlers Park Sanitary Protection Project is located along an estimated 260 metre stretch of German Mills Creek, located within the Don River watershed. The Project Area is within municipally owned property known as German Mills Settlers and Berczy Wycliffe Park, situated west of Don Mills Road between John Street and Steeles Avenue East, in the City of Markham. A 750 mm diameter sanitary line and public trail run parallel to the watercourse within the north east section of the park and cross the watercourse within the Project Area.

Figure 1. Project location mapping with work area highlighted in by red polygon. TRCA, 2018.

Project Background

In 2011, TRCA in association with York Region, developed the Infrastructure Hazard Monitoring Program (IHMP). The purpose of the IHMP is to ensure timely identification of risk to infrastructure due to watercourse activity (i.e. channel migration, widening, etc.) and efficient prioritization and mitigation of such risks in collaboration with stakeholders. The IHMP broadly divides watercourse erosion risks into two types of sites: intersection sites to assess the risk of bed erosion where the sewer crosses a watercourse, and proximity sites to assess the risk of bank erosion and lateral channel adjustments in close vicinity to the infrastructure. Intersection sites are categorized using an “I-” identifier, while proximity sites are categorized using a “P-” identifier.

The 750mm diameter sanitary main was installed within German Mills Settlers Park in 1970. Over the past 48 years, German Mills Creek has naturally migrated within the floodplain and has shifted over or in close proximity to the sanitary main or associated maintenance chambers. As a result, the watercourse is now at risk of exposing the sanitary infrastructure at six distinct locations within German Mills Settlers Park. Three alternative solutions have been proposed to protect sanitary infrastructure. As such, a Schedule B Municipal Class Environmental Assessment for Water and Wastewater Projects is being utilized as part of the planning and design process for this project.

Manhole (located downstream of I-152) in proximity to German Mills Creek. TRCA, 2018.
Figure 2. Manhole (located downstream of I-152) in proximity to German Mills Creek. TRCA, 2018.
Existing conditions at P-060, facing downstream. TRCA, 2017.
Figure 3. Existing conditions at P-060, facing downstream. TRCA, 2017.
Existing conditions at P-068 facing downstream of pedestrian bridge. TRCA, 2017.
Figure 4. Existing conditions at P-068 facing downstream of pedestrian bridge. TRCA, 2017.

Schedule B Municipal Class Environmental Assessment for Water and Wastewater Projects 

A Municipal Class Environmental Assessment is a study that identifies the potential positive and negative effects of municipal infrastructure projects, and the process includes an investigation and evaluation of the impacts on the natural, social and technical environment. A Schedule B Municipal Class Environmental Assessment includes public and stakeholder consultation, evaluation of design alternatives, and identification of measures to mitigate any adverse impacts. The Schedule B Municipal Class Environmental Assessment Process is divided into the following three phases of the Class EA process:

Phase 1 – Identify the problem and/or opportunity
Phase 2 – Identify and evaluate alternative solutions
Phase 5* – Implementation

*Note Phases 3 and 4 are only conducted by a Schedule C or greater Municipal Class Environmental Assessment

In 2018, TRCA commenced Phase 1 of the Schedule B Municipal Class Environmental Assessment for Water and Wastewater Projects in accordance with the Environmental Assessment Act. A Notice of Intent initiating the project was published in the Markham Economist on April 26, 2018. Following initiation of the project, a Public Information Centre meeting was held on Tuesday, May 29th, 2018, in which interested community members attended and provided input on the planning and design process, including commenting on the proposed alternative solutions (Phase 2 – Identify and evaluate alternative solutions).

Upon identifying the preferred solution, TRCA will complete the environmental analysis and work with stakeholders to further inform the design process and complete the Project File. As part of the process, a Project File will be created to officially document project milestones and will serve as an opportunity for the public and stakeholders to provide further comment. A Notice of Completion will be published in late summer 2018 to invite interested community members and regulatory agencies to review and comment on the Project File.

Public Consultation and Notice Materials

To view project notice and consultation material, follow the links below:
Notice of Intent
Public Information Centre Meeting Presentation
German Mills Settlers Park Sanitary Infrastructure Protection Concepts & Evaluation
Public Consultation Comment Form

Scope of Work

Next steps include:

  • Project File and Notice of Completion following the 30 day review period
  • Development of detailed designs based on the preferred alternative solution
  • Obtain all necessary permits and approvals to proceed to construction
  • Construction tentatively scheduled for summer 2020, pending available budget and receipt of permits and approvals

Construction Information

Construction information showing work area, access areas, tentative schedule and construction highlights will be updated once the project commences in summer 2020.

Contact Us

For more information regarding this project, please use the contact details outlined below:
Phil Wolfraim, Project Manager 
Erosion Risk Management
Restoration & Infrastructure Division
pwolfraim@trca.on.ca
416.661.6600 ext. 5522