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Task (cont.) Estimated Cost <br />ripper, 12 in. ripping depth, 12 ft. ripping width. <br />Approx. 1,056 sq. ft./min. ripping production (from Cat. <br />performance handbook). Approx. 1.7 hr. (say 2 hr.) <br />required at $120/hr. 240 <br />Replace 17,263 c.y. topsoil (ave. six in.) on 21.4 ac. <br />using 637D scraper. Average one-way haul distance <br />of 350 ft. From Cat. performance curves, approx. 375 <br />c.y./hr. production. Approx. 49.3 hrs. required (say <br />50 hr.) at $180/hr. 9,000 <br />• Seed bed preparation. Use 230 DBH 4WD farm tractor <br />with disc attachment, fertilizer bin attachment and one <br />operator. Approx. 3 ac./hr. discing rate. For 21.4 ac., a <br />total of approx. 7.1 hr. (say 8 hr.) required at $85/hr. 680 <br />• Seed 21.4 ac. Current price of seed mixture (drilled rate) <br />given in Exhibit E is approx. $117.07/ac. (Sharp Bros. <br />Seed Co.). 2,506 <br />• Seeding of 21.4 ac. using 80 DBH 4WD farm tractor with <br />drill attachment. Approx. 4 ac./hr. drilling rate. For <br />21.4 ac., a total of approx. 5.4 hr. (say 6 hr.) required <br />at $70/hr. (includes equipment and operator, etc.). 420 <br />• Fertilizer for 21.4 ac. Assume that 87 lbs./ac. 46-0-0 <br />(at $0.19/Ib.); 89 lbs./ac. 0-45-0 (at $0.18Ab required. <br />Current price of fertilizer mix is $32.55/ac. 697 <br />Mulch, mulching and crimping of 21.4 ac. Use 2 tons/ <br />ac. hay. Total of 2,140 40-lb. bales required at $3/bale <br />($6,420). Use 230 DBH farm tractor with power mulcher <br />and two operators. Approx. 3 ac./hr. application rate. <br />Total of approx. 7.1 hr (say 8 hr.) required at $95/hr. <br />($760). Crimp mulch using same tractor with crimper <br />and one operator. Approx. 3 ac./hr. crimping rate. <br />Total of approx. 7.1 hr. (say 8 hr.) required at $85/hr. <br />($680). 7,860 <br />• Mobilize/demobilize equipment. 1 , 500 <br />subtotal 25,783 <br />-25-