Wednesday, April 3, 2013

Critique of dredge plan unfounded

In the March 27 issue, a letter writer (“Silver Creek plan poses big risks”) compared the channelization of the Black River that comes out of the high country in southern Missouri with the work to be done in Silver Creek.  The problem with his theory is that the Black is a steep, fast-moving freestone river like the Big Wood.  Silver Creek is a low-gradient, slow-moving river rising out of springs in a nearly flat valley.

Silver Creek is much too slow moving to create the damage inflicted on the Black River.  In fact, the lack of velocity in Silver Creek is part of the problem being addressed by the project. 

In addition, the volume of water necessary to cause damage in these rivers is hugely different.  Recent flows in the Black were 3,000 cubic feet per second, compared to 140 cfs in Silver Creek.

    The irony is that all negative consequences of channelization that the writer described have already happened to the Big Wood.

Nick Cox


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