River Usk
| River Usk (Afon Wysg) | |
| River | |
 |
|
| Country | Wales |
|---|---|
| County | Powys, Carmarthenshire, Monmouthshire, Torfaen, Newport |
| Tributaries | |
| - left | Afon Cilieni, Nant Brân, Afon Ysgir, Afon Honddu (Powys), Grwyne Fawr, Afon Gafenni |
| - right | Afon Hydfer, Afon Crai, Afon Senni, Afon Tarell, Afon Cynrig, Afon Menasgin, Caerfanell, Afon Crawnon, Afon Llwyd, Ebbw River |
| Source | |
| - location | Fan Brycheiniog, Powys, Wales |
| - elevation | 502 m (1,647 ft) |
| - coordinates | 51°54′3″N 3°43′19″W / 51.90083°N 3.72194°W |
| Mouth | Bristol Channel |
| - location | Uskmouth, Newport, Wales |
| - elevation | 0 m (0 ft) |
| - coordinates | 51°32′31″N 2°59′6″W / 51.54194°N 2.98500°WCoordinates: 51°32′31″N 2°59′6″W / 51.54194°N 2.98500°W |
| Length | 102.0 km (63 mi) |
| Discharge | for Chain Bridge (Usk) |
| - average | 27.919 m3/s (986 cu ft/s) for 1957-2012 |
| - max | 585.4 m3/s (20,673 cu ft/s) on 27 Dec 1979 |
| - min | 1.58 m3/s (56 cu ft/s) on 27 Aug 2003 |
The River Usk (Welsh: Afon Wysg) 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 at Newport Wetlands.
The Monmouthshire and Brecon Canal follows the Usk for most of the length of the canal.
The name of the river derives from a Common Brittonic word meaning "abounding in fish" (or possibly "water"), this root also appears in other British river names such as Exe, Axe, Esk and other variants. The name is cognate with (plural of ), the Welsh word for fish.
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Wikipedia