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
Swansea existing mosques (Swansea University Mosque, Hafod Mosque, Imam Khoei Mosque). Swansea is represented in Buddhism with the Dharmavajra Kadampa Buddhist Centre, Pulpung Changchub Dargyeling (Kagyu Tradition) and a branch of the international Dzogchen Community (Nyingma Tradition). Swansea Synagogue and Jehovah's Witness Kingdom Hall are both located in the Uplands area. Swansea City Centre is undergoing a £1 billion transformation scheme. A large area of the city is earmarked for redevelopment. A new city-centre retail precinct is planned involving demolition of the dilapidated St. David's Shopping Centre which has three or four traders, about 13% of the retail space in the