Laserfiche WebLink
Ashb��rn "1'o��nhomcs <br />4. AS-BUILT DRAINAGE <br />"Che As-I3uilt drainagc systcm on this small devclopmcnt was constructed essuntially <br />according to thc original dcsign. '1'hc location of catch basins and undcrground convcyuu. c <br />�vas constructcd approximately according to thc drawings. Thcrc are somc small variations <br />in pipe slopc f'or Qic installed pipes, �vhich do not affect the drainage system. All pipes slopc <br />down to allow gravity (low into lhe existing drainage s}'stem. <br />"I'hc as-built clevations for thc rontrol structurc and vault wcrc cntcrcd into thc Watcrn�orks <br />program and re-calculated. "f'Ihe results arc bclow in lh� latest printouts. 7�hc fnal vault size <br />(iuside dimensions) is 15.3' X 3G.0' X 2.G1' which pro� ides the total volume required of <br />1d71 cubic fcet. The volume requircd, which includcs a Pactor of Safely of 1.36%, is I55G <br />cubic tcct. Including thc manholc volume of 85 cubic fcct thc required volume cquals thc <br />��olumc provided. <br />As 13uilt, the stomi dctcntion system will function as dcsigncJ. detaining the required amount <br />uf storm ���ater runol�l�. 'I�hc rcicasc r:uc, as dctcrmincd by thc as-buill ori�ice sizes rclease lhe <br />storm �vatcr esscntially at thc proscribcd ratcs (sec tablc bclow). <br />�YI�I 04-�41-13 � <br />� <br />