The Rhymney River (Welsh: Rhymni) is a river in the Rhymney Valley, south-east Wales, flowing into the Severn estuary.

The river forms the boundary between the historic counties of Glamorgan and Monmouthshire.

[edit] Path of the river

The river runs south, through (in order):

• Rhymney
• New Tredegar
• Bargoed
• Ystrad Mynach
• To the north of Caerphilly, the river arcs east avoiding Caerphilly mountain
• Bedwas
• Trethomas
• Machen
• Draethen
• Llanrumney and Rumney, two districts of Cardiff

[edit] History

Being part of the South Wales coalfield and South Wales Valleys iron producing area, the river had poor water quality through most of the twentieth century. Since the closures of most of the coal mines, the water has become a lot cleaner and is now full of fish and insect life and supports plenty of other wildlife.

Coordinates: 51°29′N 3°07′W / 51.483°N 3.117°W / 51.483; -3.117