Manapouri Power Station - Machine hall (111 m long, 18 m wide, 34 m high) and road access tunnel 2040 m long 6.7 m wide and high with a semi-circular arch roof.
Manapouri Tailrace - 2 Tunnels - original tailrace tunnel 9817 m, 9.2m diameter horseshoe section, commenced 1964, breakthrough 1968 drill-and-blast construction, sixteen deaths. Second tailrace tunnel 9829 m, 10.05 m diameter, circular section, commenced 1997, breakthrough 2001, commissioned April 2002, tunnel boring machine construction, zero deaths.
Otira - 8566 m - opened 1923 - between Arthur's Pass and Otira, in the Southern Alps on the transalpine South Island Midland Line - continuous 1 in 33 grade - electrified until 1990s.
Tawa No. 2 - 4324 m - opened 1935, goods on 1 line, 1937 all traffic - longest double track tunnel in New Zealand. Between Wellington (near Ngauranga ) and Glenside (near Tawa).
Okaihau - on the never opened section of line to Rangiahua, now used for road traffic.
Single track Parnell tunnel, adjacent to the current dual track tunnel.
Karangahake Tunnel - 1006 m, in the Karangahake Gorge, on the former East Coast Main Trunk, closed in 1978. Now part of a walkway.
Porootarao Tunnel - 1071 m, replaced by new tunnel on deviation in 1980.
Nine tunnels on the North Island Main Trunk that were deviated around between 1981 and 1985. Most were on the Mangaweka Deviation. The Hedgehog tunnel near Taihape is adjacent to State Highway 1; access to the rest is unknown.
Four tunnels on the closed Moutohora Branch ranging from 45 to 258 metres in length. One tunnel is accessible on a public walkway, the others can all be viewed from public roads.
Three tunnels of unknown status on the closed Ngatapa Branch. Public access unknown.
No. 24 tunnel on the Palmerston North - Gisborne line - 123 metres (collapsed).
No. 12 tunnel on the Wellington & Manawatu Railway (now NIMT) - abandoned in 1900.
In the South Island
Spooners Range Tunnel - 308 metres, on the closed Nelson Section. Accessible by public walkway.
Kawatiri Tunnel - on the closed Nelson Section. Accessible by public walkway.
Abandoned tunnel - near Oaro? on the Picton line. Partially collapsed.
Chasm Creek - former Seddonville Branch. Accessible by public walkway.
Charming Creek - former private coal railway. Accessible by public walkway.
Former coal tramways at Stockton and Denniston. Public access.
Cape Foulwind - former quarry line. Public access but tunnel has largely collapsed.
Rewanui Incline - 2 short tunnels now used by access road.
Puketeraki - 157 metres. Track deviated around in a cutting. Partly collapsed and ends have been fenced over.
Sawyers Bay , Dunedin. - 101 metres, track deviated through new tunnel. Status unknown.
Caversham, Dunedin - 865 metres, track deviated through new double track tunnel. Public access to both ends but it's quite muddy (access is down the steps beside Kaikorai Valley Nurseries (between intersections with Ensor Street and Townleys Road) and also on the opposite side of road to the Caversham entrance of the current tunnel).
Chain Hills (Wingatui) - 889 metres, track deviated through new double track tunnel. Public access unknown.
Three tunnels on the Otago Central Rail Trail (former Otago Central Branch), ranging in length from 152 to 229 m. All have public access.
Three tunnels on the former Roxburgh Branch ranging from 226 to 443 m. Tunnel 1 is in public reserve, access to the others is uncertain.
Rakis - on the former Tokarahi Branch. Can be seen from road, on private land.
Conical Hill - 71 m, on the former Tapanui Branch. Public access unknown.
Hunts Road - 221 m, former Catlins Branch. Public walkway access.
Glenham Branch, 301 metres. Possible public access.
Karori Tunnel, between Kelburn and Karori, Wellington.
Northland Tunnel, between Northland and Karori, Wellington.
Hataitai - bus tunnel, Mount Victoria, Wellington.
Seatoun tunnel, between Strathmore and Seatoun, Wellington.
The Terrace Motorway Tunnel, SH1, under The Terrace, Wellington.
Moki Tunnel - approx 200 m, SH43 between Whangamomona and Taumarunui - uses wooden shoring.
There are two short twin road tunnels on State Highway 1, on the coast a few kilometres south of Kaikoura.
There are short (less than 50m) tunnels on SH3 between New Plymouth and Te Kuiti - one at the summit of Mt Messenger and a single-lane one in the Awakino gorge.
There are one or two short tunnels north of Okaihau constructed for railway purposes but now used by road traffic.
