The Pomarao river port was inaugurated in 1859. It was built in the first years following the rediscovery of the mine in 1854, as was the port village and the railway. Each year, throughout the time period of operation, the port, located close to 40 km upstream from the mouth of Guadiana at the confluence with the Chança River, provided docking infrastructure for hundreds of ships bringing supplies and equipment for the mine and carrying away loads of ore. The railway arrived in Pomarao, and measured approximately 17 km in length, thus connecting the Port to the mining extraction zone in Mina de Sao Domingos and to the remaining locations of the industrial complex. Achada do Gamo, Moitinha and the Railway Workshops The first version of the railway system used animal traction (mules) and was inaugurated in 1862. The final version, with a wider gauge (3 '6''or 1065 mm) and steam-powered locomotives was inaugurated 5 years later, in 1867. The dragging of the Guadiana river bed was continuously performed by the company Mason & Barry during the activity period of both the mine and the port. The ships were piloted through the long and sinuous fluvial bed by captains who were specialised in this function.