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411.81 <br /> MILLER <br /> CONSUL IIN6 <br /> F Nfi IN E ERS <br /> March 21,2011 <br /> Mr. Mike Costanti <br /> Western Community Energy <br /> 3890 SW 94th Avenue <br /> Portland OR 97225 <br /> Subject: Concrete Strength <br /> Project Name: Wind Turbine Foundation <br /> Project Address: 12333 Silver Falls Highway,Aumsville,OR 97325 <br /> MCE File No.090855 <br /> LDear Mr. Costanti: <br /> 1r' As you have requested,our office has reviewed the testing reports provided by Carbon <br /> Testing,Inc., regarding the concrete for the footing and pedestal of the wind turbine <br /> foundation. Testing reports dated February 15, 2010 indicated that the concrete from load <br /> number four did not comply with the 5,000 psi strength requirement at 28 days. Concrete <br /> cylinders from load four were tested again on March 15,2010 and indicated that concrete <br /> strength of load number four had increased to 5,310 psi at 56 days. Therefore, it appears <br /> from the reports received from the testing agency that concrete for the footing and <br /> pedestal exceeded the design concrete strength and are in compliance with the plans and <br /> specifications as prepared by this office. <br /> ti <br /> Respectfully, 'gatnt PROF <br /> Miller Consulting Engineers,Inc. +o r a erq <br /> o • <br /> _ <br /> r <br /> oRIF a <br /> Paul R. Albertine,S.E. 4ggy • <br /> Principal <br /> 12 -20' � <br /> 4111, <br /> Engineering Free fleal. Diverse. Snuc rural Solutions Since 1978 <br /> 9570 SW Ss•5er Blvd Snite '00 n•d. 0'err Y'214-541/ <br /> Phone 1501I 746 '250 fan ISOlI 24B di <br /> wv.x eelier se corn <br />