What is a Cofferdam and how does it differ from a regular low head dam?
” This is his reply: Mary: A cofferdam looks nothing like the steel, concrete and wood dam (Bowersock Dam) in Lawrence. A cofferdam is a series of very large concrete posts that are buried in the riverbed and protrude above the surface of the water at medium to low water levels. The problem is that it is just another name for a low-head dam and we know what those do to boaters. If you look at the drawings in the plans you will be able to see what the proposed dam would look like. You may be familiar with other rivers that have low-head dams that were provided with a boatable bypass. An example of this is the one on the Arkansas River above Canyon City and below Royal Gorge.
