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7 <br /> boating "wave"due to sediment transport requirements. Increasing the width/depth ratio is <br /> contrary to our"C"and "F"stream type restoration and enhancement work. <br /> The Lacy report goes on to say that"the W-weir is inappropriate for in-stream use in populated <br /> areas." The basis for this statement is totally unfounded. The statement that"they require <br /> extensive maintenance" is totally wrong! And the statement in the Lacy report that the W-weirs <br /> have "unpredictable flow characteristics"proves that they have not done their homework. The <br /> vertical velocity profiles, measured isovels and channel re-surveys, bank erosion measurements, <br /> near-bank stress calculations and other scientific data collected, analyzed and published provides <br /> a basis to counter their claims. What measurements were taken or what research was conducted <br /> to support the strong statements contained in their report? I see none! <br /> From a fish habitat standpoint,I would highly doubt if any fish biologist would favor installing a <br /> low-head concreted boulder check dams(U-drops)and replace vegetated banks with boulder rip <br /> rap, compared to the physical and biological function of W-weirs. There are many fish <br /> population studies associated with W-weirs in Colorado;the reader can be directed to obtain <br /> additional information, should that be necessary(Contact the Montrose office of the Colorado <br /> Division of Wildlife for data on W-weirs in the Uncompahgre and Lake Fork of the Gunnison <br /> Fishery Studies). <br /> I appreciate peer review in science,but it has to be responsible and credible. This report is <br /> irresponsible and non-credible as their conclusions are based on biased,unscientific and <br /> unsupported findings. The statements presented in the report are basically a post-action <br /> justification of their replacement of a W-weir in downtown Pagosa Springs on the San Juan <br /> River, in favor of a design developed by "Recreation and Engineering and Planning"consultants, <br /> with very limited"river restoration"objectives. <br /> Dave Rosgen,P.1-I., Ph.D <br />