 The tramway, which consisted of two main mineral lines and a number of small branches, originally used horses to pull up to three laden wagons along the tracks.Of the two main lines, the first was built to connect the collieries near Stepaside and the later ironworks using local iron ore at Stepaside, and run along the coast through a series of short tunnels to terminate in the centre of Saundersfoot at the harbour.The second line ran from the harbour to Thomas Chapel colliery near Begelly.