Ngauranga Gorge
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The Ngauranga Gorge is in the Wellington Region of New Zealand. State Highway 1 runs through the gorge, a vital link between Wellington City and the Kapiti Coast and the main route north out of Wellington. It is 2 kilometres long and has a grade of approximately 8%. 65,000 vehicles a day travelling through it, and it connects the Wellington Urban Motorway with the Johnsonville-Porirua motorway. The road up the gorge was upgraded in 1940 as the Centennial Highway.
The Newlands Interchange, at the top of the gorge, was constructed in 1997/1998 to replace a simple junction, which caused a large amount of congestion.
The North Island Main Trunk Railway crosses the bottom of the gorge via an overbridge between the Tawa No 1 and Tawa No 2 Tunnels of the Tawa Flat deviation.
There is an industrial area with some retail outlets at the bottom of the gorge, where there was previously an abattoir. There are an abattoir and quarry part way up the gorge.