Se Pontcysyllte Wætertyge is a bātberend wætertyge, þe birþ þone Llangollen Wæterweg ofer De Ēa dēne on Denbihscīre. Þes wætertyge waes getimbrod in 1805 fram Thomas Telford and hē is se lengsta and hīehsta wætertyge on Brytene