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
Poquoson River Poquoson River The Poquoson River is an , mostly tidal river in the state of Virginia. The river is an estuarine inlet of the Chesapeake Bay, entering just south of the mouth of the York River. The river flows primarily through York County, rising south of Yorktown to the west of U.S. Route 17 and flowing south to Harwoods Mill Reservoir, a 265-acre impoundment that is the terminal reservoir for the City of Newport News water supply system that was created by damming its upper reaches, where it turns east, flows under Route 17, and becomes tidal. The river flows