Owned by Vector, the tunnel stretches 9.2kms under the southern motorway from a substation in the CBD to the national grid in Penrose. CHRIS MCKEEN/STUFF The tunnel runs from Hobson St, in the Auckland CBD to Penrose - and has a halfway entry point at Newmarket. READ MORE:* A unique look inside Auckland's underground lava caves* Auckland City Rail Link project cost rises to $4.4 billion* Was the Waterview Tunnel worth the wait? CHRIS MCKEEN/STUFF Belts used by Vector staff to carry their gear when entering the tunnel. Mackenzie said the tunnel is about 3m tall and 3m wide - and has a light rail and train used for maintenance purposes.

Source: Stuff June 01, 2019 04:07 UTC