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r <br />1 <br />studies (6) that forty percent of the entire channel length within the Upper Animas <br />watershed has been altered in some way (6). This trend continues as the Animas River flows <br />through Durango. The riverbed at the Boating Park site has been confined in numerous <br />locations by development. One particular area of concern is the location of the former lead <br />r <br />smelter and uranium tailings mill at the Boating Park site. Current erosion patterns suggest <br />that the Animas River is eroding into the river -right bank at the bend in the Boating Park <br />{ site. Current designs include bank stabilization in this area to prevent further erosion into the <br />tailings mill. <br />The subsurface conditions at the site indicate that the river bottom has the ideal conditions <br />for boating park development. Bedrock in this site is close to the surface of the river bottom, <br />providing greater potential to anchor the structures without disturbing the hyporheic zone. <br />Current Flows at the Proposed Boating Park Location <br />The Animas River features significant flows within this reach. The average mean of <br />Ir monthly stream flows for this reach is shown in Figure 1: <br />I Estimated Mean of Monthly Streamflows for The Durango Boating Park <br />Jan Feb Mar Apr May Jun Jul Auq Sep Oct Nov Dec <br />Figure 1. Estimated average mean of monthly stream flows for Durango Boating <br />Park in Durango, CO. <br />7 <br />