“[A] pile driver was improvised by mounting a large steam donkey engine, a steam hammer, and a timber tower on a barge.” DamsIrrigationCivil EngineeringSteam EngineGrand Coulee Dam Author:Ray Bottenberg
“The funnel-shaped devices are tremie tubes, which are apparently being used to avoid having the wet concrete free fall into the forms where the 4-cubic-yard buckets could not fit to pour directly.” Problem SolvingCivil EngineeringGrand Coulee Dam Book:Grand Coulee Dam Source: Grand Coulee Dam