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DRMS imaging <br />Permit C-80-007 <br />TR-115 <br />Analysis of cost reduction <br />From: T. Kaldenbach, 12/09/08 <br />Change in culvert lengths (feet), TR-115 vs. RN-05: <br /> RN-05 TR-115 <br />8" culverts 235 <br />12" culverts 2830 1745 <br />15" culverts 815 0 <br />18" culverts 698 1707 <br />21" culverts <br />24" culverts <br />30" culverts <br />36" culverts <br />42" culverts <br />48" culverts <br />60" culverts <br />72" culverts <br />84" culverts <br />1475 <br />360 <br />1912 <br />827 <br />565 <br />2360 <br />0 <br />823 <br />1050 <br />1460 <br />1720 <br />1190 <br />720 <br />2130 <br />50 <br />105 <br />Change <br />(235) <br />(1085) <br />(815) <br />1009 <br />1050 <br />(15) <br />1360 <br />(722) <br />(827) <br />155 <br />(230) <br />50 <br />(718) <br />Total net change in culvert lengths, in feet (1023) <br />Change in culvert costs, TR-115 vs. RN-05: <br />Direct costs Indirect costs <br />for culvert for culvert Total <br />removal removal Costs <br />RN-05 $300,002 $77,041 $377,043 <br />TRA 15 $60,435 $15,520 75 955 <br />$239,567 $61,521F $301,088 TRA 15 Cost reduction <br />Source of cost reduction: Using the 48"-culvert diameter cost per foot <br />of $6.19, the 1023 fewer feet of culvert in TR-115 results in a reduction of <br />direct costs of $6332, or 3% of the total $239,567 of reduction in direct <br />costs in TR-115. The other 97% of the reduction in direct costs in TR-115 <br />results from unit cost changes for culverts in CIRCES (around 75% <br />reduction since RN-05).