Gradient Diagram

The nature of the terrain the WPR was built on is rugged by railway terms, with the 12.8 km section through the Weka Pass itself being an almost continuous ruling grade of 1 in 50 (2%). This was a major factor in the decision not to continue the Waiau branch (pronounced why-ow) as the South Islands main trunk, a coastal route being eventually favored.


Gradient diagram - 41 kb