The awesome Hapuawhenua Viaduct was built in 1907-1908 as part of the final works to finish the North Island main trunk railway.
The viaduct consists of 13 concrete piers and four 4-legged steel towers resting on concrete foundation blocks. There are four steel plate girder tower spans of 11 metres, five 20 metre lattice truss spans and thirteen 11 metre plate girders. In total the viaduct is 284 metres long and at its maximum it stands 45 metres high. It is unique in that it is built on a 10-chain radius curve, reflecting the difficult landscape through which it passes.
The Hapuawhenua Viaduct was in use until 1987 when the line was realigned and a new viaduct was built. It is mostly in original condition, and is currently being restored by DOC and Tongariro Natural History Society to allow visitors to again enjoy this spectacular piece of railway engineering heritage.
Photograph by Paul Mahoney.