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Lyons Quarry ��� <br /> 112d Reclamation Permit Operations <br /> Technical Revision <br /> costs associated with demobilization and clean-up of the project site following the completion of the <br /> project. <br /> Item 2.0—Project Safety Plan and Implementation <br /> The project will involve working around inactive quarry slopes and hazards, and the contractor must <br /> comply with all Occupational Safety and Health Administration (OSHA) regulations. This task <br /> includes all the contractor's expenses for employee time, labor, materials, and safety equipment and <br /> safety training necessary for preparing and executing a job safety plan. The contractor will be <br /> required to prepare the Project Safety Plan implement the plan in conjunction with project <br /> implementation. <br /> Item 3.0— Erosion, Sedimentation, and Dust Control Plan <br /> This item covers the design, installation, maintenance, and removal of temporary erosion, <br /> sedimentation, and dust control features. These features will include just over two-thousand linear <br /> feet(2015 LF) of sediment control berm along the bottom perimeter of the project site and just under <br /> three thousand eight-hundred linear feet(3769 LF) of an upland diversion berm/ditch above and <br /> around the quarry disturbed areas, as shown on Section B and Section C of the Site Grading Plan, <br /> Attachment B. <br /> The contractor will be required to install these sediment control features prior to any ground <br /> disturbing activities and maintain them throughout the duration of the project. Upon completion of the <br /> project, the bottom perimeter sediment control berm will be incorporated in the Scour Berm at the <br /> base of the fill slopes. The installed temporary erosion and sediment control features assume BMP's <br /> in accordance with Boulder County Storm Drainage Criteria Manual, including but not limited to <br /> Temporary Diversion Channels, Earth Dikes and Drainage Swales, and Sediment Control Logs. <br /> The sediment control berm and upland diversion berm/ditch footprints will be cleared and grubbed. <br /> The upland diversion berm/ditch will be cut and filled using overburden soils and supplemented with <br /> materials from other excavation areas. Some drill and blast excavation may be required. The <br /> sediment control berms will incorporate geotextile installed according to the manufacturer's <br /> guidelines. <br /> Dust generated from the project area during work and off-work periods will be controlled and kept to <br /> a minimum. The contractor will be required to develop and implement a Dust Control Plan, including <br /> Wind Erosion/Dust Control BMP's and application of water to working areas during working and non- <br /> working periods, including weekends, throughout the duration of the project. <br /> Item 4.0—Debris Removal <br /> This item includes removal of debris collected from across the site following the recent flooding. The <br /> debris was gathered and stockpiled at the site out of the drainage way. It is assumed that 25 loads <br /> of debris material will be hauled from the site. <br /> Item 5.0—Earthwork Excavation, Fill, and Compaction <br /> Once the site controls are installed, the grading plan will be implemented. All areas will be cleared <br /> and grubbed prior to excavation and backfilling. As described in the Geotechnical Stability Exhibit, <br /> Attachment E, cut slopes in the overburden sedimentary rock will be excavated using drill and blast <br /> methods to achieve overall 1.5H:1 V slopes. Fill slopes in the pit highwall area will be placed and <br /> compacted to achieve 50-foot-high benches, sloped 2H:1 V, with 15 foot wide benches. The <br /> anticipated cuttfill quantities to establish the final grading are approximately balanced at 364,700 CY. <br /> February 2017 1 6 <br />