The River Lliedi has its source in the hills near Llanelli

Llanelli

Llanelli , the largest town in both the county of Carmarthenshire and the preserved county of Dyfed , Wales, sits on the Loughor estuary on the West Wales coast, approximately west-north-west of Swansea and south-east of the county town, Carmarthen. The town is famous for its proud rugby...

 and Llannon

Llannon

Llannon is a small village and community in the county of Carmarthenshire, Wales. It is located on the A476 road 11 miles south east of the county town, Carmarthen, between Tumble and Swiss Valley...

 in Carmarthenshire

Carmarthenshire

Carmarthenshire is a unitary authority in the south west of Wales and one of thirteen historic counties. It is the 3rd largest in Wales. Its three largest towns are Llanelli, Carmarthen and Ammanford...

, Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

. The river fills the Swiss Valley reservoir

Swiss Valley reservoir

Swiss Valley reservoir, also known as Upper Lliedi reservoir and Lower Lliedi reservoir, feeds water to the towns of Llanelli and Llannon. It gets the water from the River Lliedi....

 and meets the sea at the Bury estuary

River Loughor

The River Loughor in Carmarthenshire, Wales has its source at an underground lake at the Black Mountain. It flows past settlements like Ammanford and Hendy in Carmarthenshire and Pontarddulais in Swansea. The river divides Carmarthenshire from Swansea for much of its course and it separates Hendy...

 at the former Carmarthenshire Dock, Llanelli.

The river's flow near the Llanelli coastline has been altered several times over the last 200 years to build docks to serve the large tinplate and coal mining

Coal mining

The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and since the 1880s has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United States,...

industries of the town.