(Solved): A contractor is installing a new pipeline that crosses an existing county road. The road has shallow ...

A contractor is installing a new pipeline that crosses an existing county road. The road has shallow borrow ditches on either side, and the pipeline must be laid at a grade that results in a depth cover of only 1 ft at the centerline of the road. To increase the cover depth, it is proposed to replace a 200-ft section of the road using two vertical curves of equal length as shown on the figure. The pipeline crosses at Station 10+60, and the road replacement is between Stations 10+00 and 12+00. The depth of cover (ft) at the pipeline with the proposed roadway must be ________. Enter your response in the blank.