Transmission Gully

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

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 Pāuatahanui, and Transmission Gully is also home to Battle Hill Farm Forest Park.

Beginning at Paekākāriki, 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 Pāuatahanui.