SH39 Mangati Stream Bridge Permanent Structure Replacement

⁠⁠⁠This is a Physical Works contract for the replacement of the Mangati Stream Bridge (BSN 520) located on SH39 approximately 7 km south of Pirongia. The existing bridge was damaged in the February 2026 flooding and a temporary one-lane bridge has been installed adjacent to the location.

The Contract Works comprise of:

• Construction of the new bridge with a single span superstructure comprising of four fabricated steel I-girders and a precast reinforced concrete bridge deck.

• Installations of pilled foundations. The superstructure is to be cast into the abutments. Note that steel pile casing will be procured separately by the Principal and supplied to the contractor.

• Installation of a TL-5 rigid bridge HT rail including abutment transitions, semi-rigid to rigid transitions, W-beam sections, and leading-end terminals on the bridge approaches.

• Temporary support for services during the works and permanent reinstatement on the new bridge.

• Scour protection works/river training and earthworks.

• Removal of the existing temporary bridge and associated earthworks, site restoration, and site de-establishment (excluding bridge superstructure – to be removed by Downer)

Only tenderers pre-qualified to level “Bridge Construction – Level B (3B)” and “Surfacing – Level C (2C)” under the terms of the Transport Agency’s Prequalification System are eligible to submit a tender.