銑鉄
The new canal was not a commercial success, mainly because there was little local traffic, and it relied on traffic passing through from other canals. The company correspondence shows large amounts of effort devoted to negotiations on rates, but it was not in a strong position, and coal was carried at around one third of the rate authorised by the enabling Act of Parliament. Pig iron and other heavy castings only raised d (0.6p) per ton per mile, whereas on the Monmouthshire Canal at the time, such cargoes were charged at 5d (2p) per ton per mile. Despite this, they had managed to repay most of their debts by 1826, and paid the first dividend to shareholders of one per cent. All loans had been repaid by 1836, and the dividend rose to 1.25 per cent in 1840.