South Main Street Bridge Eco-Park

Bridge and water


City of Thorold initiated a Municipal Class Environmental Assessment (Class EA) study to address concerns related to the South Main Street Bridge and Pedestrian Linkage in the Port Robinson area. The Class EA was carried out as Schedule "B'' undertaking in accordance with the Municipal Class Environmental Assessment process, approved under the Ontario Environmental Assessment Act (1990). 

McIntosh Perry Consulting Engineers Ltd. was originally retained by the City to facilitate the Class EA to address the need of providing a safe and reliable pedestrian linkage between South Main St. and Cross St. in the Port Robinson community. Subsequent to the Class EA, City of Thorold retained the services of RJ Burnside to create a conceptual rendering of a proposed Port Robinson Ecological Park (Eco-Park) at the South Main Street Bridge general location. The creation of an ecological park provides an opportunity to enhance an existing ecological habitat and an abandoned bridge currently used as a popular fishing hole/walkway connecting communities across an old canal waterway known for its wildlife. The Eco-Park design has an opportunity to reinforce the vision and character of the neighbourhood, while maintaining the ecological connection and environmental sensitivities. 

The City of Thorold has commenced the detailed design phase for the South Main Street Bridge located in the Port Robinson. The proposed design will be based on the mutually agreed “Preferred Design Concept Plan/3D Rendering” between the residents and the City. The detail design will also be in line with the display slides presented in the September 27, 2023 Public Information Centre that was held at the Port Robinson Community Centre. 

Study Area
The bridge is located between Cross St. (north) and South Main Street (south) over the former Welland River, now a segmented watercourse within Port Robinson in the city of Thorold. 
Projected Timelines

Projected timelines along with the targeted tasks that are currently being undertaken and/or prepped to commence as part of the South Main Bridge Detailed Design Phase are as follows: 

  • Topographic Survey – already ongoing since October 23, 2023 by GHD Canada retained Subcontractor (Tulloch Engineering)
  • Substructure Investigation of the bridge – substructure investigation already started by GHD Canada and Bridge Check Canada (BCC) since the week of October 16, 2023. GHD Canada currently awaiting BCC report.
  • Field Investigation – field investigations commenced the week of October 16, 2023 by GHD Canada and have now been completed since October 20, 2023.
  • Environmental Field Investigations –  to commence in the week of November 8, 2023 by GHD Environmental Team - (weather permitting).
  • Stage 2 Archaeological Assessment – to commence in the coming month(s) weather permitting.
  • Draft Existing Substructure Evaluation and Technical Memo – tentatively targeted for April 2024 and upon receiving the BCC substructure investigation reports.
  • Preliminary Design – targeted to be delivered to the City of Thorold for review between May 2024 and July 2024.
  • 60% Bridge Design – targeted to be delivered to the City of Thorold for review between July 2024 and September 2024.
  • 90% Bridge Design – targeted to be delivered to the City of Thorold for review between October 2024 and November 2024.

Geotechnical Investigation Update - February 26 to March 1, 2024

The South Main Street Bridge will be closed for a ground and underwater geotechnical investigation program. Geotechnical investigations are required to generate a detailed design recommendations for the bridge new foundations and superstructures. Completing the subsoil investigations will provide the required geotechnical information for the bridge and foundation detailed designs. The planned geotechnical investigation work along with all other field assessments will be conducted in a holistic manner to minimize damage to the ecosystem. A clearance from the Niagara Peninsula Conservation Authority (NPCA) has been obtained. 


Project Materials
Meeting Minutes
Public Engagement
Consultation with the public, key stakeholders and agencies is important for the City of Thorold. Residents are invited to attend the upcoming PIC to learn about the project.

PIC #5

Date: Wednesday September 27, 2023
Time: 5:00 to 7:00 p.m.
Location: Darlene Ryan Port Robinson Community Centre, 40 Cross St, Thorold, ON L0S 1K0 
View notice

Previous PICs


Ugo Obiako, M.Eng., C.E.T., P.Eng.
Project Manager, City of Thorold
905-227-6613 x294
P.O. Box 1044
3540 Schmon Parkway, Thorold, ON, L2V 4A7

Sean Dunsmore, P.Eng.
Manager of Engineering, City of Thorold
905-227-6613 x290
P.O. Box 1044
3540 Schmon Parkway, Thorold, ON, L2V 4A7


Figure 1: South Main Street Bridge Eco-Park Study Area Key Map

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