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
Beaminster Tunnel a white cross which can still be seen "in situ". The tunnel reduced the road's gradient from 1-in-6 (17%) to 1-in-10 (10%) and shortened it by a mile (1.6 km), as well as lowering its maximum elevation by . At the time of its opening, only a handful of road tunnels had been built in Britain; it pre-dates the construction of the first railway tunnels, and it is now the only pre-railway road tunnel in the country still in use. The tunnel was formally opened on 29 June 1832 with enthusiastic celebrations including a 21-gun salute fired from the top