Atikokan River Bridge & Anderson Dam Bridge Rehabilitation

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Location

Atikokan, Ontario, Canada

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Owner

Ministry of Transportation Ontario (MTO)

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Role

Consultant

Project Overview

Rehabilitation of two key bridge structures along Highway 622 to extend service life, improve structural integrity, and ensure long-term durability.

Key Components

Grading & Hot Mix Paving – Full-depth asphalt removal and replacement with new asphalt wearing surfaces and waterproofing membranes.
Structural Rehabilitation – Atikokan River Bridge:
- Partial-depth concrete removal from deteriorated areas on deck, approach slabs, abutments, and piers.
- Replacement of expansion joints, abutment bearings, parapet walls, and west sidewalk.
- Installation of galvanic protection to mitigate corrosion.
- Cleaning and coating of corroded steel and concrete repairs to soffits and girder ends.
Structural Rehabilitation – Anderson Dam Bridge:
- Installation of new asphalt wearing surface and hot-applied waterproofing membrane.
- Replacement of expansion joints, deck drains, and abutment bearings.
- Partial-depth concrete removal from deteriorated areas on deck, abutments, and pier.
- Reconstruction of west ballast wall and cathodic protection in areas with severe corrosion.
Drainage Improvements – Modifications to deck drains, installation of new drainage tubes, and riprap placement along embankments to prevent erosion.
Traffic Management & Staging – One-lane traffic maintained during construction with temporary traffic signals and full highway closures limited to nighttime hours for critical activities.

Challenges & Solutions

Project Impact & Benefits

Extended service life of both bridge structures through comprehensive rehabilitation.
Improved roadway safety by addressing structural deficiencies and implementing corrosion protection measures.
Enhanced durability and load capacity of the bridges, ensuring long-term reliability.
Minimized environmental impact by adhering to in-water work restrictions and implementing erosion control measures.

Construction Overview

Construction Overview:

The rehabilitation works for both bridges were completed within the 6-month construction window. The project followed the Design-Bid-Build model, with strict adherence to MTO standards, environmental guidelines, and safety regulations. The combined rehabilitation effort resulted in significant infrastructure improvements along Highway 622, benefiting both local and commercial traffic.