River Wye William Sandys in the early 1660s with locks to enable vessels to pass weirs. According to Herefordshire Council Archaeology, these were flash locks. The work proved to be insufficiently substantial and in 1696 a further Act of Parliament authorised the County of Hereford to buy up and demolish the mills on the Wye and Lugg. All locks and weirs were removed, except that at New Weir forge below Goodrich, which survived until about 1815. This was paid for by a tax on the county. Weirs were removed all along the Wye in Herefordshire, making the river passable to the western
England–Wales border an exclave of Flintshire, between Bangor-on-Dee (in Wales) and Whitchurch (in England). Returning to the River Dee as far as Chirk, the boundary then loops to the west, following Offa's Dyke itself for about , and including within England the town of Oswestry, before reaching the River Vyrnwy at Llanymynech. It follows the Vyrnwy to its confluence with the River Severn, and then continues southwards, rising over Long Mountain east of Welshpool. East of Montgomery, the boundary again follows the line of Offa's Dyke for about , before looping eastwards to include within Wales a large area near Churchstoke. It