NHER 42575 (Monument record) - Undated quarry pit at Bunker’s Hill

October 2005.
Huge pit, not precisely marked on the HER and not, it seems, mapped elsewhere. Probably the biggest in Thetford Forest. Of irregular outline, with a number of entrances and ramps leading down into it. Two main depths, the deepest probably 10m to 15m. In places there is a low bank around the pit edge and, beyond that, various slight earthworks and spoil heaps, some of which have lead to the problems in location NHER 25487.
D. Gurney (NLA), 6 October 2005.

July 2013. Field visit.
The extent of the deep quarry and surrounding associated earthworks was mapped using a hand-held GPS unit (which struggled to secure a signal under the dense tree canopy).
The quarry does not appear on the tithe map (S1) or the Ordnance Survey 1st edition 6 inch map (S2).
Although NHER 25487 and 41681 have been interpreted as burial mounds, they could instead be associated with quarrying.
D. Robertson (HES), 14 August 2013.

August 2013.
The mapping for the site has been revised, using the GPS data collected in July 2013. A copy of the original (2005) HER mapping is included in the secondary file (S3).
D. Robertson (HES), 14 August 2013.

April 2019. Breckland National Mapping Programme.
The probable quarry pit of unknown date, described above, is visible as an earthwork on imagery from a lidar survey flown in 2015 (S4). It is also visible on aerial photographs, such as (S5). Its relatively fresh appearance and its steep sides suggest a relatively late, probably late 19th century or early 20th century date. The extent of the pit has been mapped from the lidar imagery, and the Monument Polygon adjusted to encompass this [1].
S. Tremlett (Norfolk Historic Environment Service), 18 April 2019.