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activities do not interfere with mining operations, the backfilling may be behind the active <br /> mining face by as much as 300 feet. <br /> The aggregate material is being recovered using equipment typical for sand and gravel mining <br /> operations. Earth moving equipment includes, but is not limited to dozers, loaders, scrapers, and <br /> excavators. The aggregate material is being temporarily stockpiled within the mine pit or <br /> transported directly for processing. During mining and reclamation activities, water trucks are <br /> used for dust control as needed. <br /> To mitigate stability risks, setbacks from near vertical mining excavations to the amendment <br /> boundary or permanent man-made structures not owned by the applicant will be 50 feet or a <br /> minimum of three times the adjacent pit depth, whichever is greater. During the mining of <br /> Phase 3, this will only occur adjacent to the Weitzel Road right-of-way. A Structure Agreement <br /> has been obtained from the property and structure owner, Town of Timnath. The completed <br /> Structure Agreement is included in Exhibit S, Permanent Man-Made Structures within 200 Feet <br /> of the Affected Land. <br /> As mining in Phase 3 continues, the side slopes adjacent to Phase 2 will be backfilled to provide <br /> stability, but will not be immediately compacted and graded. Complete backfilling and grading <br /> of the Phase 3 mining area will occur in conjunction with reclamation of the Phase 1 mine pit <br /> area. During final reclamation, backfilling, compacting, grading, and stabilization will advance <br /> from the reclaimed Phase 2 area, through Phase 3, and expand into Phase 1, eventually creating <br /> the top of bank for the below-grade reservoir. These reclamation activities are anticipated to be <br /> concurrent with the Phase 3 mining operations. Once backfilling, compacting, and final grading <br /> has been completed in an area, it will be seeded (or otherwise stabilized) as soon as practicable <br /> (based on first available seeding season). <br /> Since backfilling and other reclamation activities are taking place concurrently with mining, <br /> large topsoil and overburden stockpiling is not anticipated long-term. If topsoil and overburden <br /> stockpiles are needed, they will be configured to have side-slopes no steeper than 2H:1 V. If the <br /> stockpiles are inactive for more than one growing season they will be seeded with the fast- <br /> growing grass seed mixture in the table below. However, since the stockpile materials will <br /> continually be used for reclamation, the stockpiles will likely be disturbed on a frequent basis <br /> and seeding the stockpiles may not be practical during the course of the operation. If stockpile <br /> seeding is not used, surface roughening will be maintained to limit wind and water erosion. <br /> Stockpile Grass Seed Mixture <br /> Rate <br /> Grass Species <br /> (lbs PLS/acre) <br /> Intermediate Wheatgrass 5.0 <br /> Blue Grama 1.0 <br /> Triticale 1.25 <br /> Rates are for broadcast seeding. <br /> Timnath Connell Pit <br /> DRMS 112 Permit Amendment Application Page 7 <br />