Metro Tunnel
The Metro Tunnel (sometimes also known as the Melbourne Metro Rail Project or the Metro Rail Capacity Project) is a metropolitan rail infrastructure project currently under construction in Melbourne, Australia. It includes the construction of twin 9-kilometre rail tunnels between South Kensington station (north west of the Melbourne City Centre) and South Yarra (in the south east) with five new underground stations. The southern portal for the tunnel is to be located to the south of South Yarra station. As a result, the tunnel will connect the Pakenham and Cranbourne lines with the Sunbury line, and allow these lines to bypass Flinders Street station and the City Loop while still stopping in the Melbourne central business district.
Tunnel Bend diversion tunnel
The tunnel is approximately 3 metres wide and 2 metres high and 200 metres long through stable rock. It is dry during periods of low river flow, and appears quite safe to walk through. The tunnel was constructed by the Goulburn Valley Sluicing Co. in 1866, during the Victorian gold rush, to divert the river flow and enable the working of the bed for alluvial gold. Floods the following year 'injured' the company's works. They planned to rebuild and resume operations when the flooding subsided, but there is no evidence that this happened.