Kaimai Tunnel Kaimai Tunnel The Kaimai Tunnel is a railway tunnel through the Kaimai Range in the North Island of New Zealand. Since it was opened in 1978, it has held the title of longest tunnel, at 8.879 kilometres, in New Zealand, assuming this distinction from the previous title holder, the Rimutaka Tunnel. It is part of the Kaimai Deviation, which was constructed to bypass the old route of the East Coast Main Trunk Railway through the Karangahake Gorge (part of which has been preserved as the Goldfields Railway). The Kaimai Deviation is a 24 km line between Waharoa and Apata, including
Cross Creek railway station the driver had to sound three short whistle blasts in rapid succession, at frequent intervals. No such emergency is known to have occurred. In considering alternatives for a railway between the Hutt Valley and the Wairarapa district to bypass the increasingly costly Rimutaka Incline, various proposals for a tunnel were considered that would have involved an eastern portal emerging at Cross Creek. Despite all the work done on investigating these ideas, the alignment eventually chosen was one that saw the tunnel emerging into the Wairarapa in a gully to the north. Once work commenced on the Rimutaka Tunnel, the fate