Pontcysyllte Aqueduct (1)
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Built between 1795 and 1805 by Thomas Telford. The aqueduct is 307m long and 38.40m above the River Dee. The cast iron trough is 3.61m wide and 1.30m deep with a tow path on one side. Interestingly, the mortar for the piers was a mixture of lime, oxen blood and water.