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HYDROLOGY AND SEDIMENTOLOGY CALCULATIONS <br />Hydrology and sedimentation inputs for each drainage structure are summarized <br />on the SEDCAD+ computer printouts found in Exhibit 1, SEDCAD+ Computer <br />Printouts. The watershed for the drainage structures are shown on the <br />Drainage and Sediment Control Map (Map R-1). The following is a summary of <br />the hydrology and sedimentation results for each drainage structure. <br />Pond 4 <br />Peak Discharge (cfs) <br />10-year, 24-hour event 25.86 <br />25-year, 24-hour event 36.14 <br />Runoff Volume (ac-ft) <br />10-year, 24-hour event 2.32 <br />25-year, 24-hour event 3.21 <br />Storm Sediment Yield (tons) <br />10-year, 24-hour event 132.7 <br />3-Year Sediment Volume (ac-ft) 0.29 <br />Ditch 4-2 <br />Peak Discharge (cfs) <br />10-year, 24-hour event 9.39 <br />Ditch 4-1 <br />Peak Discharge (cfs) <br />10-year, 24-hour event <br />Upper 9.71 <br />Middle 9.71 <br />Lower 14.81 <br />• <br />11 <br />