Wairarapa Line
The Wairarapa Line is a secondary railway line in the south-east of the North Island of New Zealand. The line runs for, connecting the capital city Wellington with the Palmerston North–Gisborne Line at Woodville, via Lower Hutt, Upper Hutt and Masterton.
The first part of the line opened in 1874 between Wellington and Lower Hutt, with the entire line to Woodville completed in 1897. It was the only New Zealand Government Railways route out of Wellington until 1908, when the government bought out the Wellington and Manawatu Railway Company who owned and operated the present North Island Main Trunk section between Wellington and Palmerston North. The line originally included the famous Rimutaka Incline, which used the Fell mountain railway system to cross the Rimutaka Range between Upper Hutt and Featherston. In the mid-1950s, the line between Petone and Featherston was substantially realigned, with the line diverted to the east of the Hutt River between Petone and Haywards to serve new housing developments in Lower Hutt, and the construction of the Rimutaka Tunnel to replace the Rimutaka Incline. Part of the former route west of the Hutt River has been retained as the Melling Branch.
The southern portion of the line between Wellington and Upper Hutt is electrified and is also known as the Hutt Valley Line. Transdev on behalf of the Greater Wellington Regional Council runs suburban services along the Hutt Valley section, as well as the Wairarapa Connection service between Wellington and Masterton. KiwiRail runs regular freight services along the line between Wellington to Masterton and between Pahiatua and Woodville. No regular services currently run over the Masterton to Pahiatua section see under Freight Service. The section may be reviewed as part of KiwiRail's turnaround plan.
The Labour Party promised during the 2017 election campaign to upgrade the track to improve operation of the Wairarapa Connection, and on 9 October 2018 the Minister of Transport Phil Twyford announced that the proposed $196 million for the region included $96 million for the Wairarapa Line; $50 million in the Wairarapa and $46.2 million south of the Rimutaka Tunnel including double-tracking the Trentham to Upper Hutt section. Work is to start in April 2019. The double-tracking was completed in November 2021. Other "infrastructure renewals" on the line include three bridges with timber elements and track renewal, replacement of signals between Masterton and Featherston and upgrades to Upper Hutt. Passing loops at Carterton and Woodside had previously been removed, leaving Featherston with the only loop between Upper Hutt and Masterton; the Carterton loop may need reinstating at some time for more frequent trains. The New Zealand Upgrade Programme announced on 30 January 2020 included passing loops at Carterton, Featherston and Maymorn and a second platform at Featherston. It is planned to have up to 7 peak services from Masterton at 15-minute intervals.
Construction
Proposals for railed transportation out of Wellington were made as early as the start of the 1850s, barely a decade after European settlement of the area began. In 1853 and 1857, investigation of horse-hauled tramways was undertaken, but no action was taken. Robert Stokes, a member of the provincial government, proposed a railway over the Rimutakas in 1858 and finally succeeded in gaining government interest in 1863. The Wellington Provincial Government established a committee to investigate proposals, and on 2 July 1866, it passed the Wellington, Hutt and Wairarapa Railway Ordinance. The act authorised a railway employing either or to carry 200 tonnes at speeds of, but construction did not commence as sufficient funds were not available in the fledgling New Zealand colony, nor were they successfully raised in England.In 1870, Julius Vogel included a Wellington-Wairarapa railway in his Great Public Works Policy and visited London to arrange a loan to finance the policy. On this trip, he was approached by several contracting firms and a contract that included the first section of the Wairarapa Line was awarded to Brogden & Sons. The construction of the line can be considered in three stages: the Hutt Valley section, the route over the Rimutakas, and the line through the Wairarapa via Masterton to Woodville.
Hutt Valley section
On 20 August 1872, construction of the Wairarapa Line began with the turning of the first sod at Pipitea Point, the site of Wellington's first railway station. Construction was delayed due to the difficulties associated with building a railway along the narrow, rocky shoreline of Wellington Harbour, and the section to Lower Hutt was not opened until 14 April 1874. Further difficulties were encountered in building the rest of the route up the Hutt Valley along the Hutt River's western bank, including the need to divert the river and reinforce its bank in places. On 1 February 1876 the line opened to Upper Hutt. On 28 December 1877 the line to Kaitoke was officially opened by the Governor,. On 1 January 1878 the line to Kaitoke was opened to the public; becoming the railhead for the Wairarapa for nearly ten months.Rimutaka section
The Rimutaka Range posed a severe difficulty to those involved in planning and constructing the Wairarapa Line. On 1 January 1878, the Hutt line opened to Kaitoke at the western foot of the range, and a steep but manageable route with a grade of 1 in 39-40 was found from Kaitoke up the Pakuratahi River valley to the site of Summit station, above sea level. However, from Summit down the eastern slope to Cross Creek near Featherston, a gradient of 1 in 14-16 was required. This was far too steep for regular steam locomotives to handle, and accordingly the Fell mountain railway system was employed. This used a centre rail to which specially designed locomotives and brake vans clung, allowing them to climb the steep slope upwards or control the descent. Despite the terrain, construction of this unique route was completed swiftly, opening to Featherston on 12 October 1878.South Wairarapa section
Construction from Featherston to Masterton across the Wairarapa plains north of Lake Wairarapa was relatively easy. The decision was taken to bypass Greytown and build the line through Woodside to bridge the Waiohine River at a point far enough up the river to be considered safe; a line through Greytown would have required a bridge at a point considered unsafe by the surveyors. The Greytown Branch was constructed from Woodside, and Greytown was briefly the effective terminus of the Wairarapa Line from the opening of the branch on 14 May 1880 until the bridging of the Waiohine a month later. Later in 1880, the line opened all the way through to Masterton.North Wairarapa section
The northern Wairarapa was more rugged and isolated, and construction was slower and more difficult. Mauriceville, north of Masterton, was reached on 14 June 1886, followed by the next to Mangamahoe on 10 January 1887. The between Mangamahoe and Eketāhuna included the long Wiwaka tunnel, the only tunnel between the Rimutaka Incline and Woodville, and the section was opened on 8 April 1889. Construction of the section to Newman was inexplicably slow, not completed until 1896. Pahiatua was reached in May 1897, including the Mangatainoka River bridge, the longest bridge on the line at. Mangatainoka is from the bridge and the railway reached it in August 1897, and the line was finally opened to Woodville and a junction with the Palmerston North - Gisborne Line on 11 December 1897.Branch Lines
Four branch lines diverge from the Wairarapa Line: the Melling Branch and the Gracefield Branch to Hutt Workshops, both still open; the Greytown Branch, closed in 1953, and the Hutt Park Railway, which ceased serving its intended purpose in 1906 but survived in truncated form as an industrial siding until 1982. At one time a branch line to Martinborough was proposed but this line never eventuated.Deviations
Several upgrades and alterations to the Wairarapa Line have been made, but only the Western Hutt and Rimutaka tunnel deviations have significantly altered its route.Hutt deviation
In 1925, construction began on what was then known as the Hutt Valley Branch, leaving the main line just north of Petone station and running east to Waterloo, opening on 26 May 1927. After World War II, new state housing suburbs developed north of Waterloo, and the railway was extended to serve them. In 1954, it re-joined the western line south of Manor Park and superseded the old route. On 1 March 1954 the former Hutt Valley Branch became part of the Wairarapa Line. The western route was truncated into the Melling Branch from Petone, with the Lower Hutt railway station becoming the Western Hutt railway station.Silversteam deviation
The deviation included a new bridge across the Hutt River, replacing a section of line now used by Silver Stream RailwayRimutaka deviation
The Rimutaka Incline was difficult, costly and time-consuming to operate, but as the Wairarapa Line had become a secondary route since the acquisition of the Wellington and Manawatu Railway in 1908, its replacement was not a priority. Various alternate systems and routes were debated, with a tunnel chosen in 1936. However, the economic conditions left from the Great Depression followed by the impact of World War II meant that work on the tunnel did not start until 1948. The Incline and the line up the western side of the Rimutakas closed on 29 October 1955 and the tunnel opened on 3 November 1955.Operation
Passenger services
When the full line opened in 1897, passenger services from the Hutt Valley to Wellington were augmented by NZR's first express from Wellington, the Napier Express. After the acquisition of the WMR, the Napier Express was re-routed to the quicker west coast route in early 1909 and the Wairarapa Mail was introduced to provide a regular service through the Wairarapa to Woodville. In 1936, RM class Wairarapa railcars were introduced; these were designed to operate at speed over the Rimutaka Incline and provided a much quicker service to Wellington and local Wairarapa services. They originally augmented the Wairarapa Mail but replaced it in 1948. Carriage trains operated only at peak times of the year when the railcar capacity was exceeded; in 1955, the Incline's closure meant the Wairarapa railcars were withdrawn and 88 seater railcars were introduced, boosting capacity at off-peak times. One Wairarapa railcar has survived and is currently under restoration by the Pahiatua Railcar Society. Mixed trains also operated until the 1950s.File:Electric Locomotives Near Paekakariki.jpg|left|thumb|EW1805, which operated on the Hutt Valley Line. It survived for preservation and is seen here with DC4611 near Paekākāriki on the North Island Main Trunk railway.
In the 1950s, the Hutt Valley line was electrified using the 1500 V DC system already operating from Wellington to Johnsonville and Paekākāriki. The electrification was opened to Taitā on 12 October 1953 and Upper Hutt on 24 July 1955, allowing for a more intensive suburban commuter service to Wellington. Originally operated by DM/D class electric multiple units and carriage trains hauled by ED and EW class electric locomotives, the carriage trains and many of the DM/D units were phased out upon the introduction of the "Ganz-Mavag" EM/ET class units in the early 1980s. The "Matangi" FP/FT class was introduced on the Hutt Valley Line in 2011–12, initially relegating the Ganz Mavag units to peak services only before being completely replacing them from 2015.
Railcar services were withdrawn in 1977, and carriage trains were re-instated progressively from early 1964. Until 1963, a railcar service operated on Friday evenings between Masterton and Woodville, and in December that year the decision was taken to replace the morning railcar to Wellington with a carriage train as over 200 passengers wished to use the railcar service that had a capacity of just 176. The final railcar service was replaced by carriage trains in December 1977; some of the carriage trains from this point until the mid-1980s were made up of de-motorised former 88-seater railcars known as "grassgrubs" in New Zealand railfan jargon. Passenger services through the lowly populated northern Wairarapa survived due to the poor roads in the area, but as they were improved, demand for the trains declined. Masterton – Palmerston North passenger trains ceased from Monday, 1 August 1988 with the last such service running on Friday, 29 July. In the 1990s, the service between Masterton and Wellington was rebranded as the Wairarapa Connection and presently operates five times each way weekdays, and twice each way on weekends and public holidays. In 2007, eighteen new SW class carriages were introduced to replace the 56ft carriages used since the service's inception; in 2013, they were joined by the six SE class to relieve capacity constraints especially on evening services.
The Wellington Metro Rail Upgrade project started in November 2019; taking about eighteen months and costing $300 million. The single-track Trentham-Upper Hutt section was double-tracked and equipped for bi-directional signalling so that trains can run on either track in either direction between Upper Hutt and Trentham. Signalling, track and three bridges were renewed, with a longer loop at Upper Hutt to hold longer Wairarapa log trains. The work is expected to improve the operation of both suburban passenger trains to Upper Hutt and the Wairarapa Connection.