Newtown Lock, spill weir and boundary markers

Newtown Lock, along with its spill weir and boundary markers, is a notable structure built with red brick and ashlar dressings. The single pound lock features brick retaining walls topped with large ashlar coping stones, and there are stone quoins at the gate recesses on both ends of the chamber. The timber gates were replaced in the late 20th century, and iron fittings secure the gateposts.

The spill weir, located on the north side of the lock along the towpath, was part of the water management system to maintain stable canal water levels. It includes an open trough for overflow, with an underground channel that has three shallow, segmental-arched brick openings supported by stone jambs and a central chamfered stone. The railings surrounding the spill weir are not original.

Additionally, the site features two roughly-carved stone boundary markers positioned on the south side of the canal at each end of the lock pound, which likely date from the late 18th century.