A brick culvert was revealed below the cross wall rubble, extending 3.05m further to the north. Both ends of the culvert had been badly damaged, possibly to denude the structure so that it could be covered up during landscaping, leaving none of it exposed. It is unknown as to why the culvert was built. However it is suggested that it was either due to the arch collapsed necessitating another through flow, or that it was built to narrow the passage to compensate for a decrease in flow. The culvert was packed around with a clay lining.

A brick culvert was built to run underneath the cross wal. It is possible that it was built after the cross wall collapsed, so that water could continue to flow through the structure. The cross wall could have then been rebuilt over the top of it, with further debris and soil and placed on top of the culvert to strengthen and support the original sluice walls. However, the presence of the apparently keyed-in arch masonry in the rubble infill might suggest that it is unlikely that this rubble was removed to build the culvert, and then redeposited. It is possible that the sluice was built whilst the cross wall and arch were still standing and clay was packed in around the culvert and underneath the arch to make the entire structure narrower and watertight, potentially sppeding up a dwindling flow of water.

<1> Laura Binns, 2015, Grange Cottage Sluice, Moor Pond Woods, Papplewick, Nottinghamshire: Report on an archaeological investigation (Unpublished document). SNT5710.

<2> Laura Binns, 2017, Report on an Archaeological Audit and an Appraisal of Future Archaeological investigation - Moor Pond Woods - Papplewick (Unpublished document). SNT5693.

<3> Rachel Townsend, 2015, Papplewick Moor Pond Sluice Survey (Unpublished document). SNT5730.