A desk-based heritage assessment for the historic environment was undertaken on behalf of the Environment Agency of Mill Weir (NGR SP 05355 68625) and Five Tunnels Weir (NGR SP 05238 68873), River Arrow, Redditch, Worcestershire (HER ref WSM 46479). Works are proposed at the weirs to enable better passage for fish. The River Arrow forms the northern and eastern boundary of the designated area that protects the Scheduled Ancient Monument of Bordesley Abbey which lies c 600m to the west. The course of the Arrow was altered by the Cistercian monks in the 12th century; its current course is a result of these engineering works. The original date of the weirs is uncertain, but Five Tunnels Weir dates back to at least the 16th century, possibly with medieval origins. It has large stones within its construction which may be of medieval date, although these may have been reused from the Abbey, post- Dissolution. Mill Weir lies just to the south of the point where the tail race from the Abbey's 12th century metalworking mill joins the Arrow. The weir does not date from this time, but is rather thought to be related to Redditch's needle working industry; constructed perhaps in the 18th century and associated with further structural remains that may hint at the site of a lost post-medieval mill.