A little known fact about this area: it was the site of Nelson's first gold rush in about 1854-55. Diggers aproached down the Waiwhero stream, because there were no roads up the Motueka Valley at that time. They found no gold in the Waiwhero, but had more luck in Tinpot Gully (where you are now standing) and Golden Gully (now more commonly called Durrant's Gully) further upstream. Between the two streams, two mine shafts remain, about 100 feet deep but are now on private property. Differing accouts number the miners between 150 and 500.
http://nzetc.victoria.ac.nz/tm/scholarly/tei-NHSJ05_04-t1-body1-d11.html?fbclid=IwAR0ijU8d01Vu_HPAoCuBairzG2e_sMx9d0l7jh0FoggwLHAGAwemzSXYXcU
Please replace the cache as you found it. You do not need to cross the fence.