During the initial construction phase the delivery of equipment was complex. It first came by train to a rail siding, was transferred over the falls and then lowered by tramway to the work site below. Hauling equipment from Cairns was relatively easy. There was no road in the early 1930s but there was the railway on the opposite bank. Getting across the gorge was another matter. A flying fox was constructed to solve that problem. A weir was built in 1935, to even out seasonal variations in flow.