R.A.Cooke's GWR track layout diagrams show the new docks access lines as "READY BY 1898". The facility comprised two pairs of tracks descending at 1 in 121 from Cadoxton Low Level Junction to Graving dock Junction, one pair feeding No.2 dock and the other No.1 dock and goods yard, all at quay level, although there was a double-line junction to access No.1 dock from the No.2 dock lines near Graving Dock Junction. The section between the two block posts (Cadoxton Low level Jct and Graving Dock Jct) had always been controlled permissively (i.e. more than one train could be permitted to enter the section at a time).