Swansea Canal coal and culm shipped from Swansea Docks suggest around 386,000 tons in 1839. The opening of the Tennant Canal to Swansea Docks in 1824 resulted in the Swansea Canal's riverside wharfs being improved, and tolls were reduced to maintain trade levels. The harbour facilities at Swansea were upgraded in 1852, when the river Tawe was diverted into a new channel to the east, and the original channel, which included the trans-shipment wharfs, became a floating harbour. A lock was constructed to give the canal boats direct access to the half-tide basin above the North Dock, and a loop of the
Birchgrove, Swansea to race to the stone on Easter morning. Cistercian monks built the nearby Neath Abbey in the early 12th century. Wintering their flocks and herds in the few open spaces down in the valley, during the other seasons keeping them in their specially constructed stone walled fields on Drummau mountain top, using the standing stone as a landmark. Many sections of the stone walls are still standing from Cistercian times. Birchgrove, Swansea Birchgrove () is a large village and community in the City and County of Swansea, Wales. It does not have a community council. The village is situated some