The Salt Island Jetty and associated Transfer House formed part of Anglesey Aluminium Smelting Works (NPRN 402430) in operation between 1970 and 2009 . The jetty is 780m long and here ships carrying raw materials crucial to the works, principally alumina and coke, docked. Every year around 10 large ships, from countries such as Jamaica and Sardinia docked here, carrying around 28,000 tons of cargo. Two travelling unloaders transferred the raw materials from the ships either by crane or through suction pipes (powered by a Howden Donken Blower). The unloaders were originally operated manually but were later computerised. To avoid contamination all raw materials were transferred separately, and once unloaded from the ship were passed onto a short conveyor belt that led onto the main jetty conveyor belt. This runs the length of the jetty to the Salt Island Transfer Station, some 900m away. At the transfer station the materials were transferred onto the mainland conveyor belt which transported the material underground, including beneath Holyhead Harbour, to the mainland transfer station on the main site some 3km to the south east.

The jetty is currently (2011) used as a docking point for cruise ships.

Louise Barker, RCAHMW, December 2011.