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TECHNICAL REVISION FOR PUEBLO EAST PIT M-1986-015 <br /> September, 2014 <br /> Revised Reclamation Plan for Phase 2 Stockpile <br /> Reference:TR Exhibit F <br /> The present reclamation plan for this stockpile area called for the soil to be removed to slightly <br /> below existing grade, a low point at the southeast corner of the area, and 3:1 slopes on the <br /> north and west side up to existing grade. It was to be a bowl shape area draining out to the <br /> southeast corner. <br /> This revised reclamation plan calls for the proposed grade to be six to eight feet above existing <br /> grade with 4:1 slopes back down to existing grade on the north, west, and east sides. Runoff <br /> will flow to the south with a minimum grade of 2%. The south side will be reduced down to <br /> existing grade where a drainage swale will carry runoff to the west. <br /> Low areas over the slurry wall will be filled in. <br /> The order of operation to accomplish this reclamation is: <br /> • Establish original elevation at the south side of the existing overburden stockpile located <br /> in the northwest corner of Phase 2. <br /> • Then remove the three crossings over the slurry wall by pushing material from south to <br /> north,filling in holes and establishing elevation for drainage. <br /> • Bring up elevation in the north east corner of the pile. <br /> • The outside slopes of the stockpile area will have slopes of 4: 1. A drainage ditch will be <br /> to be constructed 10 feet north of the slurry wall to carry water to the west and then <br /> south to the river. This will drain approximately 70-80% of the water from the pile to <br /> the west. <br /> • Drainage on the west side of the pile will have to be diverted from the north to south <br /> along the Paradiso and Maples' Property. <br /> • The remaining 20% of the water from north and east of the pile will be diverted to the <br /> east side of the pile to a drainage ditch constructed next to the Cooper and Winters <br /> fence line. This will carry water to the south of the Winters Property and then east to <br /> Phase 2. <br /> • This grading project will be completed during September and October, 2014. An <br /> excavator and dozer will be used. <br /> • In preparation for grass seeding,the area will be disked to loosen the soil. <br /> • Seeding will occur in late October to November, 2014 using the seed mix noted in the <br /> permit. Straw mulch at two tons per acre will be crimped in. This mulch will prevent <br /> significant wind and water erosion until the seed can fully germinate in the early spring <br /> of 2015. <br />