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a <br />e <br />1 <br />L� <br />U- Structure Desian Guidance Sheet <br />I UaDer Duranao Boatina Park <br />= do not touch <br />= values that can ad'usteEd <br />This spreadsheet can be used to help develop average depths of high and low flow channels. Actual dimensions <br />can be set during final design using these numbers as a guideline. Please only adjust cells that are blue. Other <br />cells should not be adjusted at all. Plot values at the bottom can be inserted into HEC -RAS directly using cut <br />and paste. All computations are made using the wier equation and are separated using Shipley's vertical <br />separation method. Dimensions are based on width PROJECTIONS (i.e. the plot shows shadow on the wall of <br />light shown through channels). Arc length is not shown. Analysis is vertical so location of low flow within high <br />flow is not important and will vary according to project constraints. This is not a comprehensive listing of <br />limitations of analysis and spreadsheet should be used by experienced designer for guidance purposes only. <br />Figure 12. Approximate weir calculations for the upper structures at the proposed Durango <br />Boating Park. <br />Figure 12 shows that at a low flow width of 35 feet the depth in the low flow will be 2.2 feet <br />at 300 cfs. A similar calculation reveals a depth of 1.5 feet at 200 cfs. The high flow width <br />of 56 feet creates a center flow depth of 4.93 feet at a flow of roughly 1400 cfs. Both this <br />location and the Lower Structures show a high flow side depth of roughly 2.7 feet at <br />recommended flows. These dimensions are appropriate for the character of the Animas <br />29 <br />