River Usk River Usk The River Usk (; ) rises on the northern slopes of the Black Mountain ("y Mynydd Du"), Wales, in the westernmost part of the Brecon Beacons National Park. Initially forming the boundary between Carmarthenshire and Powys, it flows north into Usk Reservoir, then east by Sennybridge to Brecon before turning southeast to flow by Talybont-on-Usk, Crickhowell and Abergavenny after which it takes a more southerly course. Beyond the eponymous town of Usk it passes the Roman legionary fortress of Caerleon to flow through the heart of the city of Newport and into the Severn estuary at Uskmouth beyond
Newport, Shropshire near the Via Devana (Roman Road, which ran from Colchester to Chester), and partly because of the number of fisheries (which are mentioned in the Domesday Survey). The River Meese, which flows from Aqualate Mere, lies to the north of the town. Newport sits on a sandstone ridge on the eastern border of the Welsh Marches and west of the Aqualate Mere, the largest natural lake in the English Midlands The area around it at the end of the last Ice Age was part of Lake Lapworth. Formed from melting glaciers, it covered a vast area of north Shropshire. Early