Problem $2.(12$ marks$)$ Find the maximum production for a fleet of trucks and one backhoe as

described under the following conditions. Assume a soil density of $100\mathrm{.}0$ pcf $($bank$)$ and a swell

percent of $25\%.$ Bucket Fill Factor $=100\%.$ Please use the tables provided of FOL and provide

sample calculations.

Complete the production calculations in the same manner as shown in class and in the Hauler

Production notes and assume the following:

$12$ hour days. Efficiency: $50$ minutes per hour.

Backhoe has a bucket size of $2\mathrm{.}75$ cubic yards. Its bucket load cycle is $22$ seconds. Bucket Fill

Factor of $100\%.$

$22$ ton rear dump trucks. Heaped capacity of $18\mathrm{.}3cy.$ This is the same truck as in your notes, so

the performance curves will apply.

Haul Route and Haul Conditions:

Section $1$: $2\mathrm{.}0$ miles, good earth haul road $1\%$ grade uphill. $(55l\frac{b}{?}$ ton RR$)$

$-$Section $2$: $1\mathrm{.}25$ miles Earth, Poorly Maintained Haul Road. $1\%$ Grade uphill $(140$lb$/$ton$).$

Due to the strain on the trucks using the earth haul roads, the maximum speed allowed

would be $25$ MPH when loaded and $35$ MPH when empty, if achievable.

The turn and dump time is $1\mathrm{.}0$ minutes, as the site is not very congested.