Disused rail tunnels, North Island On the Wairarapa Line before the opening of the Rimutaka Tunnel in 1955: Cruickshanks – opened 1 January 1878, between Mangaroa and Upper Hutt. Mangaroa – 152 m – opened 1 January 1878, at Tunnel Gully recreation area, Te Mārua, Upper Hutt. Now a walkway. Summit – 584 m, and three shorter tunnels (Pakuratahi, Siberia, Prices) :opened 12 October 1878 on the Rimutaka Incline. On the Rimutaka Rail Trail. Okaihau – on the never-opened extension of the Okaihau Branch to Rangiahua, unused but can be walked through – easily spotted from SH1 passing Okaihau township. This tunnel is part of the Opua to Horeke Cycleway Parnell Tunnel – single track, on the Newmarket Line, adjacent to the current double-track tunnel. Closed, with no public access. Karangahake – 1100 m, in the Karangahake Gorge, on the former East Coast Main Trunk, closed in 1978. Now a combined walkway and cycle path (part of the Hauraki Rail Trail). No.8 tunnel bypassed in 1985 by the Mangaonoho Deviation of the North Island Main Trunk. (The first seven tunnel numbers are from the Johnsonville Branch, the former NIMT line.) No.19 tunnel daylighted in 1972, on the section of line bypassed in 1985 by the Mangaonoho Deviation of the North Island Main Trunk. No.9 tunnel opened out (day-lighted)New Zealand Railway & Tramway Atlas fourth Ed at the west end of the Makohine Viaduct in 1984, on the North Island Main Trunk. No.10A, 10B, 10C, 10D, 10E, 10F tunnels bypassed in 1981 by the Mangaweka Deviation of the North Island Main Trunk. All are on private land. No.11 tunnel south of Taihape bypassed in 1985 by a deviation of the North Island Main Trunk. No.12 (Hedgehog) tunnel north of Taihape bypassed in 1985 by a deviation of the North Island Main Trunk. Adjacent to State Highway 1. Tunnel no longer exists after a realignment of SH1. No.15 tunnel bypassed in 1987 by the Ohakune-Horopito deviation of the North Island Main Trunk. Accessible from one end only. Mercer tunnel daylighted in 1937. (A total of 13 tunnels have been removed from the NIMT from Mangaonoho to Mercer. The total length of these removed tunnels is 2,642 metres.) Poro-O-Tarao Tunnel – 1071 m, replaced by new tunnel on a deviation in 1980. Four tunnels on the closed Moutohora Branch, lengths (Nos 1 to 4); 185m, 258m, 45m, 90m. One tunnel is accessible on a public walkway, the others can be viewed from public roads. Historically one or more tunnels may have been built on the closed Ngatapa Branch but no trace exists today. No 24 tunnel on the Palmerston North – Gisborne line – 123 m long (collapsed). No 12 tunnel – 27m, on the Wellington & Manawatu Railway (now Kapiti section of NIMT) between Paekākāriki and Paraparaumu – abandoned in 1900. No. 3, 4 and 5 tunnels on the Palmerston North Gisborne line were daylighted in 2007. No.4 (Kai Iwi) tunnel on the Marton New Plymouth Line was bypassed in 2008.
Disused rail tunnels, North Island On the Wairarapa Line before the opening of the Rimutaka Tunnel in 1955: Cruickshanks – opened 1 January 1878, between Mangaroa and Upper Hutt. Mangaroa – 152 m – opened 1 January 1878, at Tunnel Gully recreation area, Te Mārua, Upper Hutt. Now a walkway. Summit – 584 m, and three shorter tunnels (Pakuratahi, Siberia, Prices) :opened 12 October 1878 on the Rimutaka Incline. On the Rimutaka Rail Trail. Okaihau – on the never-opened extension of the Okaihau Branch to Rangiahua, unused but can be walked through – easily spotted from SH1 passing Okaihau township. This tunnel is part of the Opua to Horeke Cycleway Parnell Tunnel – single track, on the Newmarket Line, adjacent to the current double-track tunnel. Closed, with no public access. Karangahake – 1100 m, in the Karangahake Gorge, on the former East Coast Main Trunk, closed in 1978. Now a combined walkway and cycle path (part of the Hauraki Rail Trail). No.8 tunnel bypassed in 1985 by the Mangaonoho Deviation of the North Island Main Trunk. (The first seven tunnel numbers are from the Johnsonville Branch, the former NIMT line.) No.19 tunnel daylighted in 1972, on the section of line bypassed in 1985 by the Mangaonoho Deviation of the North Island Main Trunk. No.9 tunnel opened out (day-lighted)New Zealand Railway & Tramway Atlas fourth Ed at the west end of the Makohine Viaduct in 1984, on the North Island Main Trunk. No.10A, 10B, 10C, 10D, 10E, 10F tunnels bypassed in 1981 by the Mangaweka Deviation of the North Island Main Trunk. All are on private land. No.11 tunnel south of Taihape bypassed in 1985 by a deviation of the North Island Main Trunk. No.12 (Hedgehog) tunnel north of Taihape bypassed in 1985 by a deviation of the North Island Main Trunk. Adjacent to State Highway 1. Tunnel no longer exists after a realignment of SH1. No.15 tunnel bypassed in 1987 by the Ohakune-Horopito deviation of the North Island Main Trunk. Accessible from one end only. Mercer tunnel daylighted in 1937. (A total of 13 tunnels have been removed from the NIMT from Mangaonoho to Mercer. The total length of these removed tunnels is 2,642 metres.) Poro-O-Tarao Tunnel – 1071 m, replaced by new tunnel on a deviation in 1980. Four tunnels on the closed Moutohora Branch, lengths (Nos 1 to 4); 185m, 258m, 45m, 90m. One tunnel is accessible on a public walkway, the others can be viewed from public roads. Historically one or more tunnels may have been built on the closed Ngatapa Branch but no trace exists today. No 24 tunnel on the Palmerston North – Gisborne line – 123 m long (collapsed). No 12 tunnel – 27m on the Wellington & Manawatu Railway (now Kapiti section of NIMT) between Paekākāriki and Paraparaumu – abandoned in 1900. No. 3, 4 and 5 tunnels on the Palmerston North Gisborne line were daylighted in 2007. No.4 (Kai Iwi) tunnel on the Marton New Plymouth Line was bypassed in 2008.