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<br />Production Rate Assumptions: <br />Grading costs assumes the same grading costs (A.4) associated with waste rock <br />contouring (outslope grading). Although, these costs assume a 10% slope <br />adjustment rather than a 1 % slope adjustment. <br />Equipment: 1 - D-8N dozer <br />Diversion ditch area = 9 acres <br />$3,415/acre (9 acres) _ $30,735 <br />TOTAL DIVERSION DITCH REGRADE COSTS <br />REMAINING RECLAMATION COST OBLIGATION <br />D.4 Spillway Construction and Collection Pond <br />Equipment: 1 - D-8N dozer <br />2 - 20 yd3 over-the-road end dump trucks <br />1 - 980 front-end loader <br />Screening plant <br />D.4.1 Excavation <br />~ g -~ <br />Production rate: 4 hours/acre D-9 dozer) <br />Spillway preparation area = 7 acres , / <br />(7 acres)(4 hours/acre)($135/hr) _ $3,780 / ~/ <br />~~;~ <br />$30,73~~ <br />D.4.2 Concrete Construction <br />Concrete volume = 200 yd3 <br />Delivered concrete cost = 85/yd3 - 5 bag mix (verbal quote Southway <br />Construction of Alamosa, CO 7/l.i/99) <br />Delivery truck volume = 8 yd3/truck <br />Trucks required = 200 yd3 / (7 yd3/truck) = 25 trucks / <br />Labor = 2 hours/truck (25 trucks) (4 people) ($25/hour) _ $5,000 / .. <br />D.4.3 Rip-rap Preparation and Placement <br />Screening Plant: <br />Contract cost to screen in-place material to meet site specification. <br />Volume required = 400 yd3 <br />Third-party (SLV Earthmovers) Contract c st $10.00 (yd3 <br />(400 yd') ($10.00/ yd3) _ $4,000 /~ <br />Rip-rap Transport <br />Production Rate Assumptions: <br />Loader: 1 truck loaded each 2 minutes <br />PRELIMINARY DRAFT <br />FOR DISCUSSION PURPOSES ONLY <br />