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TRIANGLE AREA WATER SUPPLY MONITORING PROJECT <br />INTERLOCAL AGREEMENT <br />• <br />ATTACHIVIENT B <br />TAWSMP ANNUAL COST SHARES FOR PHASE VI: <br />FY 2008 - FY 2012 <br />C~ <br />• <br />The annual cost for Phase VI ofthe Triangle Area Water Supply Monitoring Project is $721,500. <br />The US Geological Survey will provide aforty-five percent cost shaze match of $324,675. The <br />Monitoring Project Partners' total annual cost for Phase VI is the remaining $396,825, plus <br />$20,000 for TJCOG services and support, plus $10,000 to rebuild a contingency balance. The <br />Monitoring Project Partners' individual annual cost shares are the sum of a base rate and a <br />variable rate. The base rate is thirty percent of the total annual Monitoring Project Partners' cost, <br />which is thirty percent of $426,825, divided equally among the Monitoring Project Partners. The <br />variable rate is seventy percent of the total annual Monitoring Project Partners' cost, which is <br />seventy percent of $426,825, multiplied by each Monitoring Project Partners' percentage of the <br />total average annual water use during Fiscal Year 2006 for all Monitoring Project Partners. <br /> Average Annual Share of Total Variable Rate Base Rate Phase Vf Annual <br /> Daily Water Use Water Use Cost Share Cost Share Cost Share <br />Project Partners (mgd) ~ <br />Apex 3.24 2.8% $8.446 $11,641 520,087 <br />Cary (includes Morrisville) 14.15 12.3°~ $36,887 $23,281 $60,168 <br />Chatham County 1.49 1.3% $3,884 $11,641 $15,525 <br />Dufiam 29.44 25.7% $76,753 $11,641 $88,394 <br />Hillsborough 1.278 1.1% $3,332 $11,641 $14,972 <br />OrangeCounty2 0.12 0.1°k $323 $11,641 511,964 <br />Orange Water and Sewer Authority 8.69 7.6°~ $22,653 $11,641 134,294 <br />'' <br />Raleigh 53.23 46.4°~ $138,762 $11,641 5150,403 <br />South Grarnille WASA 2.388 2.1% $6,225 $11,641 $17,866 <br />Wake Cou 0.58 0.5% $1,512 $11,641 513,153 <br /> <br />Total 114.61 100% $ 298,778 $ 128,048 1428,825:_ <br /> <br />Notes: <br />1. Based on raw water withdrawals during the FY 2005-2006 year as reported by the Partners. <br />2. Orange Counts Average Annual Daily Water Use is based on the percentage of the Orange-Alamance <br />Water System service azea located within Orange County, as indicated in their 1997 Local Water Supply <br />Plan. <br />Page 16 of 18 <br />