Transmission Gully

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This article is about the geographic feature. For the motorway within it, see Transmission Gully Motorway.

View of Transmission Gully near Battle Hill Farm

Transmission Gully, a chain of steep-sided, isolated valleys in the Wellington Region of New Zealand, runs approximately north-south between the Kapiti Coast and Tawa, through hills east of Porirua.

The gully's name comes from the 110,000-volt transmission line that formerly ran through it. The line, built in 1924, linked Wellington to the Mangahao hydroelectric station near Shannon, and later to the wider North Island transmission grid.

Despite lying mostly within the boundaries of Porirua City, Transmission Gully is sparsely populated, and most of the land is farmland, forest, or scrub. There are some areas with lifestyle blocks, particularly near Pauatahanui, and Transmission Gully is also home to Battle Hill Farm Forest Park.

The 1879 proposal for a Haywards–Plimmerton Line railway route north from Wellington envisaged using these valleys; the line was never built.

The only road access through Transmission Gully is the narrow and winding Paekakariki Hill Road. Beginning at Paekakariki, it travels up and over the western ridge of Transmission Gully, and then gradually descends the western bank along most of the length of the gully to Pauatahanui.

The Transmission Gully Motorway running through the gully is under construction as of 2021.[1] It will eventually become part of State Highway 1 when completed. The motorway was begun[by whom?] as part of the Wellington Northern Corridor portion of the 2008-2017 National Government's Roads of National Significance package of new state highways.[2][failed verification] It will not, however, offer any access to the gully itself, as plans envisage no on- or off-ramps between Pauatahanui and MacKays Crossing (north of Paekakariki).

References[]

  1. ^ "Transmission Gully motorway". Waka Kotahi. 2021. Retrieved 5 March 2021. The 27 kilometre four-lane motorway connects with SH1 at the existing Mackays Crossing interchange and merges with the current SH1 at Linden. [...] It is scheduled to open in September 2021.
  2. ^ "Wellington Northern Corridor". NZ Transport Agency. Retrieved 2 May 2016.

Coordinates: 41°03′S 174°56′E / 41.05°S 174.93°E / -41.05; 174.93 (Transmission Gully)


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