First built in 1839 , the docks at Port Talbot were a minor concern in relation to the more established ports .
Exports increased after the 1916 with the completion of the Margam Steelworks .
First built in 1839 , the docks at Port Talbot were a minor concern in relation to the more established ports , but exports increased after the 1916 with the completion of the Margam Steelworks .