River Gwendraeth

Below Cross Hands, it skirts the northern edge of Mynydd Mawr Woodland Park, and flows to the south of Drefach.

It crosses the 160-foot (50 m) contour to pass through Pontyberem, Pont Henri and Pontyates, by which time it is less than 33 feet (10 m) above sea level.

Passing under the A48 road, it is soon below the 160-foot (50 m) contour, flowing in a south-westerly direction to the south of Llanddarog, Cwmisfael and Llangyndeyrn, before turning southwards through Mynyddygarreg.

The valleys of both rivers flow through a mixture of modestly steep coal mining communities and through the verdant agricultural land of Carmarthenshire.

Although the route across the sands to the dock that he built was often affected by silting, it continued to be used for the export of coal long after the canal had been replaced by a railway.