Prior to upgrading work on the A1 M62 interchange at Ferrybridge, archaeological fieldwork was carried out in the area in 2001 and 2002. The new road was planned not to impact immediately in Ferrybridge henge, the only known henge in West Yorkshire. Two timber circles were discovered and recorded less than 200 metres south of the henge.
West Yorkshire Archaeology Service, undertaking a phased programme of survey and excavation to study and record the threatened landscape setting of Ferrybridge Henge, excavated two circles of pits at SE 475 241 (LO). The pit circles were found outside and to the south-east of the Ferrybridge Henge (SE 42 SE 31). Both pit circles measured around 16m in diameter, and had a central post-pit; they were formed by 13 and 14 post settings. (1)