Driving thru the area, I saw this at the side of the road. Figured it needed at cache to highlight it a bit more.
The dredge is on private property, but going by the ladder over the fence, you may be allowed to examine it closer. Follow any instruction given by locals though. The cache is a bison attached to the road-side of the fence.
BRING YOUR OWN PEN

Geo Toroa - New Zealand's next multi day event. To be held on the 26-27th October 2024 in Dunedin. If you want to come along, visit GCA7ZHD to log your "Will Attend"