Case Study: Rainbow Bridge Replacement, Lindsay Ontario
Project Overview
The Rainbow Pedestrian Bridge in Lindsay, Ontario, has been a vital part of the Kawartha Lakes community's’ infrastructure for many years, serving as a key pedestrian link over the Scugog River on the Victoria Rail Trail. The bridge, 1 kilometer north of Dobson Street and 50 meters east of the Russell Street East and Water Street intersection, has facilitated the daily movement of residents and visitors for decades. Given its significance, the replacement of the existing four-span steel girder bridge required a meticulous and comprehensive approach to ensure enhanced safety, accessibility, and connectivity while preserving its essential function within the local trail system.
Rainbow walking bridge, Russell St E | Kawartha Lakes Archive
Geotechnical and Hydrogeological Investigation
PRI Engineering was tasked with conducting a thorough geotechnical and hydrogeological investigation to describe the subsurface conditions for the Rainbow Bridge replacement project. Our team of expert engineers employed a range of investigative techniques, including drilling boreholes with split spoon sampling methods using a truck-mounted drill rig. Boreholes were drilled to depths ranging from four to ten meters below the ground surface in order to obtain a comprehensive understanding of the subsurface profile.
Laboratory Testing and Environmental Analysis
We then sent the samples extracted from the boreholes to our in-house laboratory, where they underwent rigorous testing to determine grain sizes and soil classification.
Select samples were also submitted for environmental analysis in compliance with O.Reg 153/04 and O.Reg 347; ensuring that all regulatory requirements are met is a vital part of any project. This testing phase was crucial for identifying any potential environmental concerns and guiding the design and construction phases of the project.
Hydrological Conductivity Testing
To assess the site's hydraulic properties, PRI conducted hydrological conductivity testing on two monitoring wells. These tests provided representative hydraulic conductivity values for the site, which were essential for understanding groundwater flow and its potential impact on the bridge's foundation.
Encountering Bedrock and Foundation Recommendations
During our investigation, our team encountered bedrock, which presented both a challenge and an opportunity. Based on our findings, we recommended the use of deep or shallow foundations for the bridge abutment.
Based on analysis completed by the structural engineer it was determined that the preferred foundation option was a shallow foundation.
Construction Procedures and Recommendations
PRI's involvement extended beyond the investigation phase. Our team also provided detailed recommendations for various construction procedures, including site preparation, excavation, groundwater control, material reuse, backfill and compaction, and frost considerations.
PRI’s comprehensive approach ensured that all aspects of the construction process were thoroughly planned and executed, minimizing potential risks and enhancing the project's overall quality.
Quality Control and Materials Testing
During the construction phase, PRI completed materials testing inspections to ensure quality control. This involved verifying that construction activities adhered to the design specifications and industry standards.
Our proactive approach to monitoring and inspecting the construction process helped maintain the project's integrity and ensured that the final structure met all safety and performance criteria.
Community Impact and Project Significance
The Rainbow Bridge replacement project is not just an infrastructure upgrade; it represents a significant enhancement to the local community's connectivity and safety.
By replacing the aging bridge with a new prefabricated truss bridge, the project aims to improve accessibility for pedestrians while preserving the critical link within the trail system. Traffic control, environmental protection, dewatering, and the construction of new concrete abutments were meticulously planned and executed to minimize disruption and ensure the project's success.
Conclusion
The successful replacement of the Rainbow Pedestrian Bridge in Lindsay, Ontario, emphasizes PRI Engineering's commitment to delivering high-quality, reliable, and sustainable engineering solutions.
Our thorough geotechnical and hydrogeological investigation, combined with meticulous planning and execution, ensured the stability and longevity of this critical infrastructure, exemplifying our dedication to enhancing community connectivity and safety, and setting a benchmark for future projects in the region.
We want to also extend our congratulations to the teams at DM Wills and the City of Kawartha Lakes (CKL) for their roles in ensuring the success of this project. Their collaboration, expertise, and commitment to excellence were instrumental in bringing this project to fruition. The combined efforts of all involved have not only improved a key piece of infrastructure but also significantly contributed to the well-being and connectivity of the Lindsay community.