Oxford Archaeology (OA) was asked by Atkins Ltd, acting on behalf of The Environment Agency, to carry out a programme of heritage asset recording on five paddle and rymer weirs on the River Thames (and Kennet), which are to be replaced. The weirs recorded are those at Radcot, Northmoor, Mapledurham, Blakes and Molesey. OA previously undertook a similar piece of recording on Shepperton 'B' Weir on the River Thames in Surrey.