<Table> <Tr> <Td_colspan="2"> River Dee (Afon Dyfrdwy) </Td> </Tr> <Tr> <Td_colspan="2"> River </Td> </Tr> <Tr> <Td_colspan="2"> River Dee at Llangollen </Td> </Tr> <Tr> <Th> Countries </Th> <Td> Wales, England </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Tributaries </Td> </Tr> <Tr> <Td> - left </Td> <Td> Tryweryn, Alwen, Clywedog, Alyn </Td> </Tr> <Tr> <Td> - right </Td> <Td> Ceiriog, Wych Brook </Td> </Tr> <Tr> <Th> Cities </Th> <Td> Llangollen, Chester </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Source </Th> <Td> </Td> </Tr> <Tr> <Td> - location </Td> <Td> slopes of Dduallt above Llanuwchllyn, Snowdonia, Wales </Td> </Tr> <Tr> <Td> - elevation </Td> <Td> 450 m (1,476 ft) </Td> </Tr> <Tr> <Td> - coordinates </Td> <Td> 52 ° 49 ′ 56" N 3 ° 45 ′ 56" W ﻿ / ﻿ 52.8322 ° N 3.7656 ° W ﻿ / 52.8322; - 3.7656 </Td> </Tr> <Tr> <Th> Mouth </Th> <Td> Dee Estuary </Td> </Tr> <Tr> <Td> - elevation </Td> <Td> 0 m (0 ft) </Td> </Tr> <Tr> <Td> - coordinates </Td> <Td> 53 ° 21 ′ 14" N 3 ° 13 ′ 33" W ﻿ / ﻿ 53.3539 ° N 3.2258 ° W ﻿ / 53.3539; - 3.2258 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Length </Th> <Td> 110 km (68 mi) </Td> </Tr> <Tr> <Th> Basin </Th> <Td> 1,816.8 km (701 sq mi) </Td> </Tr> <Tr> <Th> Discharge </Th> <Td> for Chester Weir </Td> </Tr> <Tr> <Td> - average </Td> <Td> 29.71 m / s (1,049 cu ft / s) </Td> </Tr> <Tr> <Td_colspan="2"> Discharge elsewhere (average) </Td> </Tr> <Tr> <Td> - Manley Hall </Td> <Td> 31.03 m / s (1,096 cu ft / s) </Td> </Tr> <Tr> <Td> - Bala Lake </Td> <Td> 13.06 m / s (461 cu ft / s) </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> </Table> <Tr> <Td_colspan="2"> River Dee (Afon Dyfrdwy) </Td> </Tr>

Where does the river dee start and finish
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