Question: Prepare a bare cost estimate based on national average prices for the following storm drain installation: A trench is to be excavated for 350 ft

Prepare a bare cost estimate based on national average prices for the following storm drain installation: A trench is to be excavated for 350 ft with cross section as shown in gure. An 18"diameter Ductile Iron pipe must be laid, and the trench will be backlled and compacted. The swell factor is 22% and the shrinkage factor is 15%. Assume that excavation Will be done With a 5/3 CY backhoe. Backlling will be done by hand, and compaction will be in 12" layers with air tamping. Haul any surplus excavated material to the dump site located 3-mile away

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