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SMALL AREA EXEMPTION 12 <br />MATERIAL STORAGE AREA NEAR EAST OF OLD POWER PLANT <br />SOIL TYPE PROGRESSO LOAM - C <br />DISTURBED NEARLY BARE <br />DATA SUMMARIZED FROM SEDCAD OUTPUT <br />STORM INFORMATION <br />Stone Type: NRCS Type lI <br />Design Storm: 10 yr -24 hr 0#1 RECIy`••�, <br />••... <br />Rainfall Depth: 1.8 inches / Q� .. . a <br />Particle Size Distribution��� e <br />Silt Loam •Q %f• *� <br />PS #1 SAE -12*= 19230 <br />SAE 12 • <br />Size (mm) In out <br />4.7600 100.00% 100.00% 00 ��• \� <br />1.0000 96.00% 100.00% �F e•e••••• V <br />�.• <br />13 0.5000 91.00% 100.00% ��NAI �(,♦ <br />0.2500 87.00% 100.00% �sraAV• <br />27 0.0630 82.00% 100.00% <br />0.0160 60.00% 100.00% <br />[/ 0.0040 33.00% 87.09% <br />STRUCTURE SUMMARY <br />Immediate Total Peak Total Peak Peak <br />Contributing Contributing Discharge Runoff Sediment Settleable <br />Area Area Volume Sediment Conic. Conc. 24 VW <br />(ac) (ac) (cfs) (acre -R) (tons) (m9/1) (ml/I) (MVI) <br />• SAE -12 IN0.50 0.50 0.43 0.03 0.90 37,782 14.74 8.46 <br />OUT 0.40 0.03 0.30 14,341 0.37 0.21 <br />STRUCTURE DETAIL <br />Fence <br />Width <br />Land <br />Te -back <br />Peak <br />Peak <br />Dewater <br />Trap <br />Flow Rate <br />Along Height <br />Slope <br />Distance <br />Fence <br />Water <br />Time <br />Efficiency <br />Contour <br />Volume <br />Stage <br />Stage <br />Conic. <br />(gpm/sq R) <br />(ft) (CIS) <br />(%) <br />(R) <br />(R) <br />(ft) <br />(days) <br />(ac) <br />SAE -12 10 <br />15 2.5 <br />2 N/A <br />0.47 <br />0.47 <br />0.29 <br />62.11% <br />SUBWATERSHED HYDROLOGY DETAIL <br />SWS <br />SWS <br />Time <br />Curve <br />UHS <br />Peak <br />Runoff <br /># <br />Area <br />of <br />Musk K <br />Number <br />Discharge <br />Volume <br />Conic. <br />(ac) <br />(hrs) <br />(cfs) <br />(ao-ft) <br />SAE -12 1 <br />0.50 <br />0.10 <br />0 <br />87.6 <br />TR5S <br />0.43 <br />0.03 <br />SUBWATERSHED SEDIMENTOLOGY DETAIL <br />SWS <br />SOIL <br />Sediment <br />Peak <br />Peak <br />24VW <br /># <br />K <br />L <br />S <br />C/P <br />PS# <br />Sediment <br />Settleable <br />Conic. <br />Conic. <br />(ft) <br />(%) <br />(tons) <br />(mg/1) <br />(ml/1) <br />(ml/1) <br />SAE -10 1 <br />0.32 <br />200 <br />2 <br />1/ 1 <br />1 <br />0.90 <br />37,782 <br />14.74 <br />8.46 <br />TR -29 Exh-8 - 197 - 8/28/03 <br />APPRovcb 10/1oj(03 <br />