The interlocking coffer dam is probably the style that will be used in the Mt. Clemens Clinton River project. Dibco officials figured they had an idea in July to free the machine. A retrieval chamber made of inch-thick sheet metal was driven into the river bank around the machine. Engineers now are designing the coffer dam. Approval for the project has been given by the U.S. Army Corps of Engineers.
Workers hope the dam project is safer than earlier efforts to remove the borer.
The old cedar pilings were driven 50 feet into the ground and that could have been the cause of the water pouring in. The logs acted as a well point. We have gone through a very rainy summer with no basement back ups to speak of. We've had a history of basements backing up during torrential rains. Now that is history.