Wessex Archaeology was appointed to undertake a detailed gradiometer survey over land between Barrow Gurney and Cheddar as part of the Southern Strategic Support Main. The project was commissioned by Black and Veatch Ltd on behalf of Bristol Water with the aim of establishing the presence, or otherwise, and nature of detectable archaeological features alongside noting any detectable geological changes along the route. This work was undertaken as part of an ongoing programme of archaeological works being undertaken ahead of the development to improve the security of the water supply across the areas of southern Bristol, Weston-Super-Mare, Cheddar, Burnham and Glastonbury. The survey area covers an area of approximately 70 ha of agricultural and developed land stretching from Cheddar at the southernmost point to Burrow Gurney and Long Ashton at the northernmost point, with a section heading west from Sandford to Banwell. The geophysical survey was undertaken between 1st February and 11th March 2016. The detailed gradiometer survey has demonstrated the presence of a number of anomalies of potential archaeological interest in both the north and south sections. The anomalies identified as being of possible archaeological interest are primarily pit- and ditchlike features. These have been identified across the length of the linear scheme and may represent enclosure ditches, banks pits and/or post holes. Alongside these former field boundaries, areas of increased magnetic response, superficial geology and historic agricultural trends were also detected.