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-306- <br /> <br />30 Year Maintenance Cost <br />For Dirt Streets <br /> <br />Roadway Characteristics: <br /> ½ mile long; 24 feet wide; 7040 sq. yd. road surface <br /> <br />AnnuaI grading requirements to maintain surface.: <br /> Grading schedule 15/yr. once in March, April, November <br /> twice in May, June, July, Aug., Sept., Oct. <br /> <br />Assumptions: <br /> 5 hours per event to gade 5 miles of dirt road <br /> therefore, lhr./mile <br /> Grader operation cost: $100/hr <br /> <br />Annual Grading Cost: <br /> 1 hr./mile x 0.5 miles x 15 events/yr, x $100/hr. = $750/yr. <br /> <br />Total City Cost for 30 years $22,500 <br /> <br />Total Present Worth for 30 years $8,443 ~ 8% <br /> $10,324 ~ 6% <br /> <br /> I <br /> I <br /> I <br /> I <br /> <br />I' <br /> <br />I <br />I <br /> <br />I <br />i <br /> <br /> <br />