The Atiamuri Bridge carries SH1 over the Waikato River, around 30km north of Taupo, passing from the Taupo to the South Waikato District.
In 2010, the NZ Transport Agency engaged BBO to undertake initial investigations to replace the existing bridge and to address local safety hazards arising from a substandard alignment and intersection on SH30. BBO provided investigation, specimen design, detailed design, monitoring, surveillance and quality assurance for the project.
The previous trussed steel bridge has now been replaced upstream of the original by a new 123m long, three span bridge, over the Waikato River on an improved highway alignment. In addition, 2.3km of SH1 has been realigned with an 800m passing lane, and the at-grade intersection between SH1 and SH30 has been upgraded.