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<br />... <br /> <br />. <br /> <br />CHAPTER 1/1 <br /> <br />. <br /> <br />-' <br />, <br />~ <br /> <br />ESTnlATED COSTS <br /> <br />A. COSTS OF CONSTRUCTION <br /> <br />A sample format for this charter will be supplied by the Colo- <br /> <br />rado Water Conservation Board upo~ request. The chapter should: <br /> <br />1.) Describe derivation of ~nit construction costs and <br /> <br />pertinent factors affecting estimated construction <br /> <br />costs. <br /> <br />2.) Include a tabulation thst ~hows the quantities, unit <br /> <br />cost, and total cost of each type of work or material <br /> <br />for each major structur~ and each class of minor <br /> <br />structures. Lump-sum e,;tima-tes should be avoided. <br /> <br />This tabulation, if lengthy, may be included in the <br /> <br />appendix. <br /> <br />3. ) Include a "SD:-L'lARY OF ESTl:-lATED PROJECT COSTS." A <br /> <br />format of an example may be supplied by the Colorado <br /> <br />Water Conservation Board upon request. <br /> <br />4.) Discuss the allowance for contingencies that wa~in- <br /> <br />cluded in this cost estimate. ,The contingency factor <br />is based on a judgment Of the unknowns iJ;l.vol'led. A <br /> <br />minimum contingency factor of 20 percent is reco~~ended <br /> <br />for most features. However, if the majority of the <br /> <br />cost of a particular fe8ture is for furnishing and in- <br /> <br />stalling machinery or equipment, a contingency factor <br /> <br />of 15 percent is suitable. Also, for pipelines, where <br /> <br />the excavation conditions have been firmly established <br /> <br />and pipeline lengths have been determined with reason- <br /> <br />able accuracy, a contingency allowance of 15 percent <br /> <br />may be acceptable. <br />