The lower part of the valley was intensely industrialised in the 18th and 19th centuries and was especially impacted by metal refining and working and to a much lesser extent by porcelain manufacture. Large areas of the lower valley remain contaminated by industrial spoil containing copper, lead, nickel and zinc. The only significant extant relic of those times is a major nickel refinery at Clydach which is part of the Canadian company INCO. The quality of the river has now greatly improved. Large salmon and trout swim up the river to spawn.
In 1992, a barrage was built at the mouth of the river.
Morfa Distributor Road, a new distributor road connecting the A4067 road (near the Hafod Copperworks site) to Morfa Road, New Cut Road and The Strand (near Swansea railway station).
Replacing the industrial and commercial premises in the Morfa Road area with a new residential and commercial development including new student flats for Swansea Metropolitan University
New Hotel in the Hafod Copperworks area
Find new uses for heritage buildings in the Hafod Copperworks area
New ferry stop in the Hafod Copperworks area
St. Thomas Riverside
The proposed St. Thomas Riverside development consists of 169 one, two and three bedroom apartments and 50 townhouses[2] and will be located on the east bank of the River Tawe in the St. Thomas area.
Trafalgar Bridge - a pedestrian and cycle bridge located near the Swansea Bay barrage: built at a cost of £1.2 million, it crosses the barrage lock and part of the bridge swings with the lock gates