Heworth, Nether Heworth Hall, stone culvert

Stone culvert running north-south noted during a watching brief at Heworth Hall. It was formed by either placing roughly hewn yellow sandstone blocks upright into a square cut through the clay natural to form a channel between 120-160mm wide, or by using smaller blocks, two or three courses high as the sides capped throughout by large slabs 100-130mm thick. In the two places examined a further layer of broken sandstone pieces overlay the cover slabs, while similarly sized sandstone rubble also formed packing within the cut behind the upright slabs where required.