Two choices for borrow soil are available:
It will be necessary to fill a 200 000 yd3 depression, and the fill material must be compacted to 95% of the standard Proctor (maximum) density. A final 10% moisture content is desired in either case. (a) What is the minimum volume of borrow from each site needed to fill the depression? (b) What is minimum quantity (volume) of material from each site to haul? (c) What soil would be cheaper to use?

Borrow A Borrow B
115pcf Density in place 1 20pcf
? Density in transport 95
0.92 Void ratio in transport ?
25% Water content in place 20%
$ 0.20/yd^3 Cost to excavate $ 0.10/yd^3
$ 0.30/yd^3 Cost to haul $ 0.40/yd^3
2.7 Gs 2.7
112 pcf Maximum proctor dry density 110A 200000 yd^3 depression is to be filled, and the fill material must be compacted to 95% of the standard Proctor (maximum) density. A final 10% moisture content is desired in either case. (a) what is the minimum volume of borrow from each site needed to fill the depression? (b) What is minimum quantity (volume) of material from each site to haul? (c) What soil would be cheaper to use?