A sinkhole measuring 20m in diameter has been found on reserve land in Waihi.
Hauraki District Council chief executive Langley Cavers said the sinkhole was found this morning on a council reserve between the Waihi Rugby Club and the Martha open pit mine.
Cavers said the site, known to be above historic mine workings, was classified as a hazard zone in 2002 and was cordoned off.
![The Waihi sinkhole. Photo/Hauraki District Council](https://www.nzherald.co.nz/resizer/v2/CGQ43P6XIJOI4AZNFWEDH4QRJU.jpg?auth=51bf1a946bc9c07cae76fcb4c8995e83886f8e5f490de00ea536c7c6b8ada5af&width=16&height=12&quality=70&smart=true)
"While this is inconvenient, it is within an area where sinkholes could be expected."