Grand Canal
When work on the Grand Canal begun in 1756 Ardclough was one of the first sections to be dug. The canal reached Ardclough in 1763, when the 13th lock, a 137 feet (42 m) double lock built with Pozzuolona mortar, was opened, following to the ambitious design of the canal’s original engineer, Thomas Omer. When a new engineer, John Trail took over construction of the canal in 1768, the proposed canal capacity was reduced from 170 ton barges to 40 ton barges.
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