Projects | CTH-N Bridge

A fast-tracked bridge replacement that restored a critical freight route in just 10 months, delivering long-term performance while minimising disruption to local traffic and commerce.

Following the discovery of structural and scour-related issues during routine inspections, the county partnered with local contractors and leveraged the InQuik system to rapidly replace the bridge, limiting road closure to just three weeks while delivering a structure designed to serve the community for more than 75 years.

Dimensions

40'L (37' clear-span) x 35' W

Client

Marathon County

Products

IQ40

Type

Single-Span Bridge

Location

Wisconsin, USA.

Key project points

Accelerated Delivery
Completed within 10 months of the bridge inspection, significantly reducing the time typically associated with bridge replacement projects.

Minimal-Traffic Disruption
Road closure was limited to just three weeks, helping maintain freight movements and local connectivity.

County-Led Delivery
The county utilised its own workforce, equipment, and resources while engaging local contractors for specialist services.

75+ Year Design Life
The completed integral bridge provides a durable, low-maintenance solution designed for long-term performance.

Critical Freight Route Upgrade
Replaced an ageing 1945 structure and maintained the reliability of an important agricultural and freight corridor.

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The location

Located on County Trunk Highway N in Wisconsin, the bridge serves as an important freight and agricultural transport route for the surrounding region. The corridor supports local industry, commercial traffic, and everyday community travel.

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Because of its strategic importance, maintaining access during replacement works was a key project objective. The bridge replacement ensures the route can continue supporting regional economic activity for decades to come.

Challenges

Routine bridge inspections identified structural deterioration and scour issues that required urgent action. Waiting for state and federal funding programmes would have delayed replacement beyond an acceptable timeframe, requiring the county to explore alternative delivery methods.

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Although detour lengths were relatively modest, prolonged disruption would have impacted freight operators, agricultural businesses, and local road users. The county needed a solution that balanced speed, affordability, and long-term performance.

How we helped

InQuik provided a bridge solution that gave the county greater control over project delivery while enabling rapid construction using local resources and contractors. The prefabricated abutments and deck panels streamlined installation, allowing the existing bridge to be demolished, foundations constructed, and the new structure installed within a compressed programme.

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The collaborative delivery model reduced construction duration and improved cost certainty while maintaining quality outcomes. The result is a modern, AASHTO-compliant integral bridge that delivers improved reliability, reduced maintenance requirements, and a design life exceeding 75 years.