 The line was to run from the south side of the New Dock, avoiding interference with the Dafen line which ran to the north side.The main line would run through Llangennech, Pontardulais and Llandebie.There were to be thirteen branches, mostly short spurs to nearby pits but including one to Gelli Fawr and Garnant, and another to Cross Hands on Mynydd Mawr, later to be known as the Mountain Branch, or Great Mountain Branch.