This cache marks the eastern approach to the old Raumai Bridge, which had a troubled past. The bridge was built after many years of lobbying by eastern Pohangina Valley residents, who took their life into their hands every time they forded the river, especially in times of flood. 
Finally, in 1906, a bridge was built over the river, and was opened by none other than the premier of New Zealand, Sir Joseph Ward who travelled up from Wellington by train for the occasion. Many had misgivings about the eastern approach to the bridge from No. 4 Line, which cut into the side of a steep bluff, and only a year after its completion, their doubts proved well-founded. After a period of heavy rain, a large slip of earth and rock fell from the cliff face onto the bridge, destroying its eastern span. A new bridge was erected in the following years, but this too was afflicted by slips.The bridge was replaced by a concrete structure, along with a realigned approach road in 1973. The old bridge was made entirely of timber and no remnant is evident, but the western approach to the old bridge is visible beyond the toilet block at Raumai Reserve. See Wildbore: A photographic legacy (Totara Press, 2018) for a photo of the slip-damaged bridge taken in 1907 by Charles E. Wildbore.
For more information on the history of the Raumai Bridge see: https://envirohistorynz.com/2018/07/08/ghost-bridge-wildbore-cache-no-2/
BYOP
FTF: huhugrub