Question: A contractor has been awarded a contract for the construction of a retail shopping center. A major part of the site work for the project

A contractor has been awarded a contract for the construction of a retail shopping center. A major part of the site work for the project is the construction of a structural fill that will be paved and used as a parking lot. Review of the contract drawings and specifications indicates that the compacted fill will average 60 inches in depth and cover an area 540 feet by 900 feet. The contractor has identified an area near the site with suitable fill material located just over a mile from this construction project. Compaction tests on the rock dirt mixture fill material indicate a wet unit weight of 2,900 pounds per bank cubic yard, a shrinkage of 12% when compacted to the design density, and a swell of 25%. The contractor has a fleet of Caterpillar 725C articulated end dump trucks available to haul the fill material to the construction site and has extracted the information shown below regarding the trucks from the manufacturer's literature. The haul road has a 5% uphill grade for 500 feet, a downhill grade of 4% for 3,000 feet and an uphill grade of 2% for the last 2,000 feet when traveling from the project site (dump area) to the borrow site (load area). The contractor estimates that the rolling resistance will be about 75 pounds per ton, and the coefficient of traction will be about 0.6. Job conditions are considered average at the load site and average at the dumn site (huildino site)
\table[[Empty Weight,51,191 pounds],[Top Speed,35 mph],[Heaped Capacity,20 cubic yards],[Maximum Load,52,029 pounds],[Weight Distribution (empty),],[Front,62%
A contractor has been awarded a contract for the

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