Brian Perry Civil in conjunction with Higgins, constructed a 120m-long multi-span road bridge over the North Island Main Trunk Railway. Delivered by a local team, the project was initiated to enable access from the old State Highway 1 north of Hamilton to a new inland port.

The focal point of the project was the construction of the multi-span, BBO-designed bridge over the railway, with no Blocks of Line required.

The project required a range of works including:

• Earthworks
• Embankment fills
• Ground improvement through CFA piling
• Bored pile foundations
• MSE block retaining walls
• Three waters networks
• Pavement construction
• Wetlands upgrade

The project continued further into the new inland port and industrial area with 1km of new roadway and a large roundabout. All services to support multiple businesses facilities were required.

Due to the close proximity of the site to a waterway, strong environmental controls were implemented and maintained for the life of the project. This culminated in the upgrade of a large retention pond into a fully functioning wetland to process stormwater before entering the local waterway.

The project in numbers:

• 40,000m3 of earthworks
• 15no. 900m diameter bored piles to approximately 20m deep
• 5 piers and crosshead structures
• 24no. 50t 30m-long Super T beams were landed using a 400T crane.
• 2 cranes to tandem lift over the railway line
• 950m of mainline stormwater drainage
• 850m of gravity wastewater line
• 2km of PE water mains
• 2,500m2 of deep lift asphalt for the roundabout
• 6,540m2 of full pavement construction