"Bill Tuthill" wrote:

On another note, it is possible to build low-risk low-head dams. The AWA
could form an engineering advirosy group to make recommendations for 'em.

Actually, there is a project underway (assuming it gets all the necessary
approvals and funding) for turning the Calgary Weir (Calgary, Canada) from
one of the most lethal weirs around into a safe whitewater play park, with
several passable channels of varying difficulty.

-Paul