Maymorn southern portal of the Rimutaka railway tunnel, which opened in 1955 and replaced the Rimutaka Incline railway line which ran over the Rimutaka Range. The old route passes within 40 metres over the tunnel's exit. Maymorn Maymorn is a rural area of Upper Hutt city in the Wellington region of New Zealand consisting of Rural Hill and Rural Valley Floor zones. For statistical purposes, Maymorn is counted as part of Te Marua in the New Zealand census. The usual resident 2013 population of the Te Marua area was 1,152. The area is a tranquil setting consists of lifestyle blocks and
Tunnel Railway Romney, Hythe and Dymchurch Railway. As the new railway would not be carrying heavy loads and would be travelling only a short distance, it was built as a narrow gauge railway, with a track gauge of . This allowed the new branch tunnel to be built to far smaller dimensions than the existing tunnel, at just high and wide. Although a cable haulage system had initially been considered, Ramsgate Olympia decided early in the line's planning to electrify the line. A third rail system was rejected due to concerns for the safety of the large numbers of children expected to