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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />SCOPE <br /> <br />........ .. '\ <br />~;,,;;t,;u <br /> <br />This report presents results of comparative cost estimates <br /> <br />for an earth dam at two alternative sites; (1) the Lower Weld <br /> <br />County site near Hardin, Colorado, and (2) the Narrows site near <br />Fort Morgan, Colorado. In our Report No. 7547-7354 dated March 11, <br />1964, covering engineering and geologic investigatio~s at the Lower <br />Weld County site, our opinion was given that from the engineering <br /> <br />and geologic viewpoint, the Weld County site is superior to the <br /> <br />Narrows site. It was recommended that the Bureau make comparative <br /> <br />cost estimates of construction at these two sites. Tbe U.S.B.R. <br /> <br />has completed the estimates for both sites, and we have reviewed <br /> <br />the design and estimates. <br /> <br />The basic conclusions resulting from our review are listed <br /> <br />briefly below followed by a discussion of criteria and assumptions <br /> <br />for the estimates made by our firm. <br /> <br />SUMMARY OF CONCLUSIONS <br /> <br />(1) <br /> <br />The total yardage of compacted materials required for the <br />dam and foundation at the Narrows site is 7,400,000 cubic <br />-yar.ds- .while -that. .required-at- the-I.n..",.. -We1d-COUJ1tj'- sUe,.is.. - - <br />17,600,000 cubic yards. Both of these are based on the <br />assumption that the crest elevatibns presently planned and <br />furnished us are correct, i.e.; elevation 4610 for the <br />Lower Weld County site and elevation 4448 for the Narrows <br />site. <br /> <br />(2) <br /> <br />In our opinion, the cost of the dam proper at the Lower Weld <br />County site will be approximately $11,000,000 higher (field <br />cost basis) than the dam at the Narrows site. The influence <br />of the dam cost on the cost of the overall project utilizing <br />U.S.B.R. figures and including U.S.B.R. indirect costs is <br />shown in Table I attached. <br /> <br />DISCUSSION <br /> <br />Data Furnished by U.S.B.R. <br />Following is a list of U.S.B.R. data utilized for the estimates <br /> <br />made by our firm: <br /> <br />~C'OD~~!> [)."CL f [) [.~H[ i:I ~ <lD .oN D . ,~OCI" T E ~ <br />