A new highway is to be constructed. Design A calls for a concrete pavement costing $95 per foot with a 12-year life, two paved ditches costing $5 per foot each; and two box culverts every mile, each costing $9,000 and having a 12-year life. Annual maintenance will cost $1,800 per mile; the culverts must be cleaned every three years at a cost of $400 each per mile. Design B calls for a each, and three pipe culverts every mile, each costing $2,150 and having a 6-year life. The replacement culverts will cost $2.450 each. Annual maintenance will cost $2,900 per mile; the culverts must be cleaned yearly at a cost of $215 each per mile and the annual ditch maintenance will cost $1.30 per foot per ditch Compare the two designs on the basis of equivalent worth per mile for a 12-year period. Find the most economical design on the basis of AW and PW if the MARR is 6% per year pavement costing $55 per foot with a 6-year life; three sodded ditches costing $1.70 per foot Click the icon to view the interest and annuity table for discrete compounding when the MARR is 6% per year The AW value for Design A is $-70339 /mi. (Round to the nearest hundreds) The PW value for Design A is S-589597 /Imi. (Round to the nearest hundreds.) The AW value for Design B is s mi. (Round to the nearest hundreds.) A new highway is to be constructed. Design A calls for a concrete pavement costing $95 per foot with a 12-year life, two paved ditches costing $5 per foot each; and two box culverts every mile, each costing $9,000 and having a 12-year life. Annual maintenance will cost $1,800 per mile; the culverts must be cleaned every three years at a cost of $400 each per mile. Design B calls for a each, and three pipe culverts every mile, each costing $2,150 and having a 6-year life. The replacement culverts will cost $2.450 each. Annual maintenance will cost $2,900 per mile; the culverts must be cleaned yearly at a cost of $215 each per mile and the annual ditch maintenance will cost $1.30 per foot per ditch Compare the two designs on the basis of equivalent worth per mile for a 12-year period. Find the most economical design on the basis of AW and PW if the MARR is 6% per year pavement costing $55 per foot with a 6-year life; three sodded ditches costing $1.70 per foot Click the icon to view the interest and annuity table for discrete compounding when the MARR is 6% per year The AW value for Design A is $-70339 /mi. (Round to the nearest hundreds) The PW value for Design A is S-589597 /Imi. (Round to the nearest hundreds.) The AW value for Design B is s mi. (Round to the nearest hundreds.)
