Stillwater–Ngākawau line

Stillwater–Ngākawau line
Opening of the Midland Railway, Stillwater junction, 1889
Overview
StatusOpen
LocaleWest Coast, New Zealand
Termini
Stations14 operational
31 closed
Service
TypeHeavy rail
Services1
Operator(s)KiwiRail
History
Commenced3 March 1874 (1874-03-03)
Opened31 December 1875 (1875-12-31)
Completed23 February 1942 (1942-02-23)
Closed beyond Seddonville10 February 1975 (1975-02-10)
Closed beyond Ngākawau3 May 1981 (1981-05-03)
Technical
Line length183.72 km (114.16 mi)
Number of tracksSingle
Track gauge3 ft 6 in (1,067 mm)
Route map

Bridge
No.
km
length
in m
0.00
Stillwater
1
0.6
3.5
Kamaka
7
Red Jacks
8.9
Ngahere
18
10.5
Nelson Creek
15.6
Matai
28
19.3
20.5
Ahaura
24.8
Raupo
28.4
Totara Flat
37
33
35.6
Ikamatua
38.6
Hukarere
45
38.8
40.8
Waimaunga
48
44.2
45
Mawheraiti
46.8
Hinau
50
Maimai
61
50.6
52.8
Tawhai
56.5
Tawhai Tunnel
376
59.8
Taipoiti
65
60
61.6
Reefton
64.9
Waitahu
68
84.8
70.4
Cronadun
74.7
Larrys Creek
75
75
Larry / Awarau River
78.5
Rotokohu
84.4
Landing
82
84.8
89.2
Oweka
91.4
Inangahua Junction
85
92.8
93.3
Buller
89
94.3
91
96.9
Welshman Creek
100.2
Mackley Ballast Pit
92
100.4
103.7
Rahui
94
104.2
Tracy Stream
97
108.6
Slaty Creek
last spike
98
110
Newman Creek
99
110.2
Stable Creek
113.5
Hawk's Crag
Tunnel 2
282
113.9
Tunnel 3
55
115.19
Tiroroa
100
116.8
Redmond Creek
120.2
Tunnel 4
153
102
120.9
Cascade Creek
121.1
Cascade
121.3
Tunnel 5
151
103
121.6
Little Cascade Creek
124.3
Tunnel 6
47
125.4
Tunnel 7
daylighted 1987
80
127.2
Te Kuha
135.7
Queen Street
Tauranga Bay quarry
Omau
9
Tanks
7.9
Bulls
6.5
Bradshaws
5.1
Carters
Martins
135.9
0.0
 
Westport
138.4
Sergeants Hill
141
Fairdown
149
0.0
 
Waimangaroa
Conns Creek Branch
1
Waimangaroa
2.9
Conns Creek
133
149.6
154.7
Birchfield
161.4
Granity
164
Ngākawau
30.9
Hector
38.89
Nikau
40.8
Summerlea
41.79
Mokihinui
43.9
St. Helens
44.99
Seddonville
48.01
Mokihinui coal mine
Bridge
No.
km
length
in m

The Stillwater–Ngākawau line (SNL), formerly the Stillwater–Westport line (SWL) and the Ngakawau branch, is a secondary main line, part of New Zealand's national rail network. It runs between Stillwater and Ngakawau via Westport on the West Coast of the South Island. It was one of the longest construction projects in New Zealand's history, with its first section, at the south end, opened in 1889, and the beginnings of the Ngākawau Branch, at its Westport end, in 1875. The full line was completed in 1942. The only slower railway projects were Palmerston North to Gisborne, 1872 to 1942, and the Main North Line to Picton, 1872 to 1945.

The main traffic has always been coal. In 2021 opencast mines along the line produced 1,321,541 tonnes of coal, 984,951 tonnes of it from Stockton Mine at Ngākawau. All the other mines in the country produced only 1,234,560 tonnes.

Passenger journeys peaked at around 500 a day in 1946 and ceased in 1967. From 1891 until about 1970 the line had a refreshment room, initially at Totara Flat, then Ikamatua, then Stillwater.