Upper Harbour Bridge
The Upper Harbour Bridge (also called Greenhithe Bridge) is a motorway bridge which is technically two bridges as of 2006 spanning over a reach of the Waitemata Harbour and connects Hobsonville (in Waitakere City) and Greenhithe (in North Shore City), New Zealand.
It is also an important connection for State Highway 18, which will become even more important once the Western Ring Route is finished (likely to be in the 2010s).
History
The original bridge was built in the 1970s. This proved insufficient for modern traffic demands of over 27,000 vehicles per day (soon to be up to 35,000 vehicles per day with the completion of the motorway works) and a duplicate bridge was constructed next to it. The new bridge was designed and engineered by Beca, and built between 2005-2006 by Fletcher Construction using self-compacting concrete. The new bridge cost NZ$ 35 million and provides a 524 m long, 16.5m wide, 10-span crossing. This was designed to match the existing 457 m long existing 7-span cantilever bridge aesthetically.