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Culvert 157 <br />This 18" CMP near BB Road provides the landowner with a crossing over the irrigation lines <br />which run across the property. Since little drainage from irrigation tailwater flows into this <br />culvert, no design has been shown. The capacity of this 18" culvert is approximately 11.2 cfs, <br />which in well in excess of any drainage that might flow through this culvert. <br />Culvert 158 <br />This 12" CMP near BB Road serves to protect the irrigation lines which run across the property. <br />Since this culvert lies on the surface and no drainage flows into this pipe, no design has been <br />shown. <br />Culvert 159 <br />Time of Concentration (SCS) <br />Curve Number: 73 <br />Length of Flow: 1477.03 ft <br />Average Land Slope: 2.90 % <br />Time of Concentration: 0.522 hrs, 31.3 mins <br />Graphical Peak Discharge Tue Mar 15 15:15:49 2016 <br />Project: New Horizon Mine By: JSS Date: 03/15/16 <br />Location: C159 Checked: Date: <br />1. Data: <br />Drainage area: .................... A = 15.1767Acres <br />Runoff Curve Number: ............. CN = 73 <br />Time of Concentration: ........... Tc = 0.52 <br />Storm Type: ....................... = II <br />Pond and swamp areas spread <br />throughout watershed ............... = 0.00 percent of A <br />0.0000 Acres <br />2. Frequency ........................yr = 25 <br />3. Rainfall,P(24-hour).............. in = 2.40 <br />4. Initial abstraction, Ia............ = 0.7397 <br />5. Compute Ia/P....................... = 0.3082 <br />6. Unit peak discharge, qu...... csm/in = 428.14 <br />7. Runoff,Q.........................in = 0.5144 <br />8. Pond & swap adjustment factor,...Fp = 1.00 <br />9. Peak Discharge,gp...............cfs = 5.2223 <br />Attachment 2.05.3(3)-1 Page 56 June 2016 (TR -73) <br />