Mangaroa railway station war. After the war the depot was a disposal site for surplus stores until RNZAF use ceased in July 1949, at which time it is assumed that the site was transferred to the NZ Army for their use. Prior to the construction of the Rimutaka Tunnel, several proposals for a tunnel under the Rimutaka Ranges to bypass the Incline section involved tunnels with a western portal to the north-east of Mangaroa station. In 1898 a survey was completed for a tunnel between Mangaroa and Cross Creek. The idea received a great deal of attention, but ultimately went nowhere as such
Yimbun Railway Tunnel HC Stanley; the steel and concrete Harlin Rail Bridge over Maronghi Creek at Harlin; and the Yimbun Railway Tunnel. Approximately two dozen timber rail bridges are still intact, although their condition varies greatly. Yimbun Railway Tunnel is located between and from Wulkuraka station along the former Brisbane Valley Branch Line formation and is sited beneath a saddle between two knolls. Yimbun Railway Tunnel is a semi-elliptical, concrete-lined, straight tunnel that is long and has a gradient of 1:165 against north-bound traffic. It has an earthen floor and is approximately high at its apex. Both portals feature the date "1910". The