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Aggregate Industries, Morrison Quarry Amendment No. 7 to Permit M-1973-021 Morrison, CO October 2021 | 38 revegetation (20H:1V). Compaction will be performed with tracked equipment (D9 bulldozer) performing a minimum number of passes to achieve specified densities. The South Quarry (below El. 7,000) is estimated to require aggregate fill volume of 137,491 cubic yards to reclaim through Phase III. The average haul distance for the South and West Quarry fill areas from the Central Quarry stockpile area is 1.15 miles (El. 7,000 bench). Final grading of all fill slopes, benches, crest areas, and toe areas will ensure that water is not allowed to pond on or adjacent to the fill slopes. Grading will be performed to the proposed slope gradients shown in the Grading Plan (Exhibit F.1 through Exhibit F.3). Final subgrades will be developed using survey equipment from Item 4.0 and a CAT D9 bulldozer or CAT 349 excavator. Final grades, with topsoil included, will be developed using an excavator to lightly spread out the organic material and prevent compaction. Quality assurance and quality control testing shall be performed in accordance with the specifications for the soil placement, lift thickness, compaction and moisture density requirements. Benches will be constructed at contour intervals described above and will be sloped with grades no steeper than 2H:1V. All fill material will be placed as follows: • Placed in loose, horizontal lifts not to exceed 30-inches thick, based on the maximum particle size of the fill materials; maximum rock sizes are limited to two-thirds of the lift thickness • Compacted to achieve greater than 95% of the maximum dry density determined in accordance with ASTM D698 and specified in AM05 • Placed in a manner that allows for a moisture content within 3% of optimum based on ASTM D698 Testing for in-place density and moisture content will be performed in accordance with ASTM D 6938. Testing will be performed by the operator (or their subcontractor) on a frequency of one test for each lift of fill placed. Documentation will include the following components: • Quality Control testing results for the manufacture of fill materials • Daily QA reports during fill operations • Weekly construction reports during reclamation of the fill slopes • Nuclear density and compaction testing summaries • Lift thickness testing and verification summaries • QA lab testing per technical specification requirements and frequencies • Record ambient fill material temperatures as specified • Photographic documentation of each element and stage of construction • Additional construction monitoring and testing as directed