The Koranui Incline was an inclined tramway on the West Coast of the South Island of New Zealand that, for four years from late 1882 to the end of 1886, brought coal from a mine high on Mt Frederick down to a railway line near sea level. It was first powered by a single engine that moved the whole 3.6 kilometre (2.2 mile) length of ropeway, but was later modified into a series of five self-acting inclines.