Homer Tunnel

The Homer Tunnel is a 1.2 km (0.75 miles) long road tunnel in the Fiordland region of the South Island of New Zealand, opened in 1953. New Zealand State Highway 94 passes through the tunnel, linking Milford Sound to Te Anau and Queenstown, by piercing the Darran Mountain range at the Homer Saddle. It connects between the valley of the Hollyford River to the east and that of the Cleddau to the west.

The tunnel is straight and was originally single-lane and gravel-surfaced. The tunnel walls remain unlined granite. The east portal end is at 945 m elevation; the tunnel runs 1270 m at approximately a 1:10 gradient down to the western portal. Until it was sealed and enlarged it was the longest gravel-surfaced tunnel in the world.

William H. Homer and George Barber discovered the Homer Saddle on 27 January 1889. Homer suggested that a tunnel through the saddle would provide access to the Milford area.

Government workers began the tunnel in 1935 after lobbying by J. Cockburn of the Southland Progress League, and the completion of at least a rough road to the eastern portal site in the same year. The tunnel and the associated Milford Road were built by relief workers during the Depression, initially just starting with five men using picks and wheelbarrows. The men had to live in tents in a mountainous area where there might be no direct sunlight for half of the year. At least three were killed by avalanches over the coming decades.

Progress was slow, with difficult conditions including fractures in the rock bringing water from snow melt into the tunnel. Compressors and a powerhouse in the nearby river were eventually built to pump out 40,000 litres of water per hour. Work was also interrupted by World War II (though the actual piercing of the mountain had successfully been achieved in 1940), and an avalanche in 1945 which destroyed the eastern tunnel portal. These problems delayed the tunnel's completion and opening until 1953.

In 2002 a tour bus carrying tourists from Singapore caught fire inside the tunnel, halting 150 m from the eastern portal. The passengers and the bus driver had to tread through the pitch-dark and smoke-filled tunnel to safety with the help of head beams from vehicular traffic at the entrance of the eastern portal. However, two passengers got separated and made their way to the Milford end. Three people were flown to Southland Hospital and treated for smoke inhalation. As a result of this incident a satellite phone and fire extinguishers were installed in the tunnel.

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