sentences:  In 1967 trains were frequently diverted onto the Loop Line between Longport and Kidsgrove via the Pinnox branch during the electrification of the West Coast Main Line, the upgrading of which involved construction of a new line avoiding Harecastle tunnel.The section from Etruria to Waterloo Road remained open for oil traffic from Century Oils in Hanley; this traffic ceased on 31 July 1969.The northern part of the route remained open until 1976 to transport coal from an opencast mine at Park Farm, near Goldenhill.