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TRIANGLE AREA WATER SUPPLY MONITORING PROJECT <br /> INTERLOCAL AGREEMENT <br /> ATTACHMENT B <br /> TAWSMP ANNUAL COST SHARES FOR PHASE VII: <br /> FY 2013—FY 2018 <br /> The annual cost for Phase VII of the Triangle Area Water Supply Monitoring Project is <br /> $564,000. The US Geological Survey will provide a forty-five percent cost share match of <br /> $254,000. The Monitoring Project Partners' total annual cost for Phase VII is the remaining <br /> $310,000,plus $20,000 for TJCOG services and support. The Monitoring Project Partners' <br /> individual annual cost shares are the sum of a base rate and a variable rate. The base rate is thirty <br /> percent of the total annual Monitoring Project Partners' cost, which is thirty percent of$330,000, <br /> divided equally among the Monitoring Project Partners. The variable rate is seventy percent of <br /> the total annual Monitoring Project Partners' cost, which is seventy percent of$330,000, <br /> multiplied by each Monitoring Project Partners' percentage of the total average annual water use <br /> during Fiscal Year 2011 for all Monitoring Project Partners. <br /> ......._......_.. ._.... ................ ..._. ....... <br /> Average Annual Share of Total Variable Rate Base Rate Phase VII <br /> Daily Water Use Water Use Cost Share Cost Share Annual Cost <br /> Project Partners (mgd)' <br /> Apex 3.460 5.9% $13,698 $12,375 $26,073 <br /> Cary (includes Morrisville) 16.890 28 9% $66,868 $24,75 0_ $19,339$91,618 <br /> Chath. Y ....._. _.._ 759 _.__. 0% $6,964 <br /> __. . $12 3 ... <br /> am Count .__1 3..... ..... .. .v: <br /> $6 964 75 <br /> , <br /> $109071 $12,375 <br /> Durham 27.550 47.2% $121,446 <br /> Hillsborough 1 170 2'66% ­$4&32 $12,375 $17,007 <br /> Orange County 2 0.188 0 3% $744 $12,375 $13,119 11 <br /> Orange Water and Sewer Authonty„ 7 331 12 6% $29 024 $12,375 $41,399 <br /> Total 58.35 100% $ 231-,0001 $ 99,000 $330,000 <br /> Notes: <br /> 1.Based on raw water withdrawals during M I year as reported bythe Partners. <br /> 2.Orange County's Average Annual Daily Water Use is based on the percentage of the Orange-Alamance Water System service ar <br /> located within Orange County,as indicated in its 2010 Local Water Supply Plan. <br /> Orange-Alamance Water System service area in Orange County=29% <br /> Local Annual Cost*: $330,000 <br /> *Costs include ongoing water-quality monitoring,10 stream gages,and managementfee <br /> *In addition,this cost includes an Algal Toxins Study(4 toxins plus 2 T&O compounds at 7 lake site&interpretive report) <br /> Page 14 of 22 <br />