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<br />. <br /> <br />r\(~f'~ <br />~vv~ <br /> <br />Two bridges will be required over the South Platte River channels. <br />Bridges will also be re~uired over the Fort Morgan Canal and the <br />Jackson Lake Outlet Canal. <br /> <br />The feasibility design and cost estimate was prepared using <br />the following present day design standards provided by the Highway <br />Department, State of Colorado. They also provided a cost per mile <br />for the roadway based on these standards and their experienced <br />contract costs: <br /> <br />. <br /> <br />(1) <br />(2) <br />(3) <br />(4) <br />(5) <br />(~ <br /> <br />Road design based on current traffic. Average daily <br />count 310 cars. <br />Design speed 60-70 miles per hour. <br />Maximum grade, 6 percent. <br />Maximum curvature, 30 - 30'. <br />Desirable right-of-way width, 120 feet - minimum <br />right-of-way width, 80 feet. <br />Because of sandy material in this area, cut and fill <br />slopes cannot be steeper than 3 to 1. Slopes 4 to 1 will <br />be required in shallower cuts and fills. <br />ll-foot asphalt lanes with 4-foot asphalt paved shoulders <br />making a total width of 30 feet. <br />Roadway section as follows: <br />(a) Two inches asphaltic pavement with 3/4-inch maximum <br />size aggregate extending across a 4-foot shoulder. <br />(b) Four inches of crushed rock or gravel base course with <br />3/4-inch maximum size aggregate. <br />(c) A minimum of 8 inches of subbase consisting of selected <br />materials. Amount and design of subbase material <br />depends upon the characteristics of the foundation <br />soil available in the field. <br />Bridges <br />(a) H-20 loading. <br />(b) Width - 24 feet, curb to curb. <br /> <br />(7) <br />(8) <br /> <br />(9) <br /> <br />By relocating State Highway No. 144 parallel to the relocated <br />railroad, a direct route around the reservoir is justified without <br />regard to section lines because of the severance of land ownerships <br />for the railroad and highway together generally will be no more than <br />for the railroad alone. <br /> <br />The estimated cost of replacement in kind for the relocation of <br />State Highway No. l44 was also computed. Information provided by <br />the Department of Highways, State of Colorado shows that over <br />85 percent of the existing highway has a total width of 28 feet <br />or more. They furnished an estimated contract cost per mile for <br />replacement in kind of $63,000 which is $4,000, less than the cost <br />per mile furnished for present day standards. The total estimated <br />cost of the relocation for replacement in kind, including contin- <br />gencies and overhead, is $3,540,000. The total estimated cost of <br /> <br />. <br /> <br />25 <br />