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The distance across the harbour from Ngauranga to Miramar is a little over 4km.
The harbour is roughly 20m plus deep.
One of the highest ships visiting Wellington is the Queen Mary 2, at roughly 72m from waterline.
The below are three recently or soon to be completed bridges of similar length and height
The Arthur Ravenel Jr. Bridge was built over the Charleston River in 2005.
It’s 8 lanes and 4km long.
It lands on an island part way across.
The total cost is reported at around US$700m
In Turkey The Çanakkale 1915 Bridge is being built across the Dardanelles, a major international waterway.
It will be 3.6km long and 73m high and carry six lanes.
image: VESTNIK KAVKAZA
The Akashi Kaikyō Bridge in Japan is 3.9km, with 66m clearance.
It was completed in 1998.
image: By Tysto - Self-published work by Tysto, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=477955
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