Viaduct Bascule Bridge

It is a steel bascule rolling truss bridge. The Auckland Harbour Board installed it to span the 13.7m between the Eastern and Western Viaducts. It originally carried a railway connected to oil loading facilities on Wynyard Wharf and was raised and lowered at the arrival and departure of the fishing fleet.

It was manually operated and raised by rolling back 90° on its cam ends under counterweight. A pinion moved along a horizontal rack at the height of the centre of the cam-end circle. Later driven by electricity, it was in use until the development of the Maritime Museum on Hobson Wharf in 1992.

Now it’s used as a thoroughfare between Wynyard Quarter and the city centre and has been preserved for its engineering heritage value.

Deck replacement

Because the Viaduct Bascule Bridge is now over 90 years old, its decking had to be completely replaced in 2023. This will extend the deck's lifespan by a further 50 years or more.

Viaduct Bascule Bridge maintenance

Essential maintenance has been undertaken on the Viaduct Bascule Bridge’s upper structure to ensure its ongoing reliable and safe operation. The work which was finalised in May 2026 included removing the existing protective coating, addressing corrosion and applying a new protective membrane.