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Twelve foot high retaining walls are necessary to keep the coal stockpile away from the 35 ton coal <br />blending bins. <br />Retaining Walls <br />Item <br />North <br />Elevation <br />East Elevation <br />Footer <br />Wall Thickness <br />12" <br />12" <br />12" <br />Face Area and Length of Footer <br />790 <br />360 <br />110 <br />Units <br />SF <br />SF <br />LF <br />Unit cost <br />7.77 <br />7.7 <br />20.59 <br />Total direct cost <br />$6,138 <br />$2,772 <br />$2,265 <br />Job supervision hours <br />2 <br />2 <br />2 <br />Job supervision cost <br />$117 <br />$117 <br />$117 <br />Profit, insurance, and bond @ 13.07% <br />$802 <br />$362 <br />$296 <br />Contract = Direct + Overhead <br />$7,058 <br />$3,251 <br />$2,678 <br />Engineering @4.25% of Contract <br />$300 <br />$138 <br />$114 <br />Reclamation management 5% of Contract <br />$353 <br />$163 <br />$134 <br />Estimated bond <br />$7,711 <br />$3,552 <br />$2,926 <br />The reclamation of the 35 ton coal blending bins is based on the outside dimensions of the <br />structure. <br />35 Ton Coal Blending Bins <br />Item <br />2 Bins <br />6 Footers <br />Width <br />30 <br />2 <br />Length <br />12 <br />4 <br />Height <br />22 <br />4 <br />Quantity <br />7920 <br />24 <br />Units <br />CF <br />LF <br />Unit cost <br />$0.2257 <br />$20.59 <br />Total direct cost <br />$1,788 <br />$494 <br />Job supervision hours <br />4 <br />4 <br />Job supervision cost <br />$234 <br />$234 <br />Profit, insurance, and bond 13.07% <br />$234 <br />$65 <br />Contract = Direct + Overhead <br />$2,255 <br />$793 <br />Engineering 4.25% of Contract <br />$96 <br />$34 <br />Reclamation management @5 % of Contract <br />$113 <br />$40 <br />Estimated bond <br />$2,464 <br />$866 <br />MR -113 Exhibit 28- Page 248 Revised 04/05/12 <br />