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r <br />APPENDIX A <br />Pervious CN Data: <br />Landscaped area 86.00 <br />Impervfous CN Data: <br />Paved Areas 98.00 <br />Pervious TC Data: <br />Fiow type: Description: <br />Sheet Sheet flow Landscaped Area <br />Sheet Parking Surface Flow <br />Channel SD Pipe <br />Impervious TC Data: <br />Flow type: Description: <br />Sheet Parking Lot <br />Channel SD Pioe <br />0.2100 ac <br />0.7600 ac <br />Length: Slope: Coe(f: Travel Time <br />19.00 ft 1.00% 0.4000 10.78 min <br />isi.00ft 0.50% 0.0100 3.49min <br />3i3."v0 ft 0.50% 42.0000 2.09 min <br />Length: Slope: Coeff: Travel Time <br />170.00 ft 0.50% 0.0100 4.29 min <br />373.00 ft 0.50% 42.0000 2.09 min <br />Control Structure ID: Control Structure - Multiple Orifice Structure <br />Descrip: Multipie Orifice <br />Start EI Max EI Increment <br />100.0000 ft 102.7000 ft 0.10 <br />Orif Coeff: 0.62 Bottom EI: 0.00 ft <br />out to 2nd: 22400 (t <br />2nd to 3rd: 0.3900 ft <br />Lowest Diam: 1.0200 in <br />Diam: 4.1000 in <br />Diam: 0.8000 in <br />RLPCOMPUTE [RLPooi] SUMMARY <br />2 yr Match Q: 0.0404 cfs Peak Out Q: 0.0419 cfs - Peak Stg: 102.20 ft - Active Vol: 3665.34 cf <br />10 yr Match Q: 0.1789 cfs Peak Out Q: 0.1580 cfs - Peak Stg: 102.30 tt - Active Vol: 3892.46 cf <br />100 yr Match Q: 0.3447 cts Peak Out Q: 0.3618 cis - Peak Stg: 102.70 it - Active Vol: 0.11 acft <br />NodelD:Pand <br />Desc: Pond <br />Start EI: 100.0000 ft <br />Contrib Basin: Proposed WQ <br />Length ss1 ss2 <br />52.00OOit 3.00h:1v 3.00h:iv <br />Max EI: <br />Contrib Hy�d: <br />W idth <br />21.5000 ft <br />102.7000 it <br />ss3 ss4 <br />3.00h:tv 3.00h:1v <br />Streambank Erosion Control Detention Volume <br />Pond volwne based on required release mtes = 48G2 cf <br />Site impervious Cover = 100 x 33,3? Isf / 42,120sf = 79% _> <br />Cortection facror = 0.42 per ESM1�1 figure 1-3.1 <br />Additional volume required based on correction factor = 0.42 * 4862 cf = 2042 cf <br />Total volume required = 48G2 cf + 2042 cf = G904 cf ��1i <br />Total volume provided = 7037 cf <br />Th� extra volume required by the correction factor will be provided by increasing the Iength of the <br />pond. The depth of the pond will remain the same. <br />( G i / <br />flcnG-I I('n.��"l� %! � �) o �i�--✓Yy� 5F- I i�N ,i �Ll r� / !/� J G� , <br />Q:W2061\CiviREnginecr�Rcports�Appcndix A_mudi�cd.dac 5R9/2003 Pagc 2 of 3 1�5 <br />