A [W] ft wide, [D] ft deep, [L]00 ft long trench is dug for…
A ft wide, ft deep, 00 ft long trench is dug for a bank of fiber optic lines. The fiber optic lines are encased in in. of concrete at the bottom of the trench, and the trench is backfilled. (The concrete around the fiber optic lines fills the full width of the trench.) If the local soil has a swell of % and a shrinkage of %, determine the volume, in LCY, of borrow needed to backfill or the volume of spoil remaining after backfilling with the excavated soil. Express your answer in LCY to nearest 0.1 CY, and express borrow as a negative volume and spoil as a positive volume. (Ex. 10.34 LCY of borrow –> -10.3 or 10.34 LCY of spoil –> 10.3.)