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MINING PLAN EXHIBIT D(CONT) conveyors, crushers and screen plants . No blasting will take place at this mine. As much as possible, the surface drainage will be main- tained in the same direction as it now exists . The proposed sloping plan for the excavated area should eliminate any concerns of erosion occurring on the site. On a typical operation of this type we may use 2 to 3 ac- ft of water per year. Most of the water used for dust control will be used on haul roads . Please refer to EXHIBIT G -WATER for the discussion of how water will be used at the site and the source of said water. There are no ditches crossing the site and no surface or subsurface water will be impacted by the mining operation. All interior pit slopes will be maintained with a pit-ward attitude so that historic drainage patterns can be maintained. This same slope management plan will prevent any offsite slides or other disruptions . Isolation berms or ditches will be con- structed around the active mining area to prevent stormwater from contacting the disturbed area. All stormwater contacting the disturbed area will be retained on site and allowed to evaporate or soak into the underlying gravel. No U.S . Army Corps of Engineers, 404 permit is necessary, as there are no water bodies on the site nor are there any wetland areas . MINING TIMETABLE This estimated mining timetable is based on an average year and Walsenburg Sand and Gravel, CO. expects a specific year to vary widely from the average. If there are changes in the mining timetable we will discuss the reasons for the change in the annual report that follows the change and modify it at that time. ESTIMATED MINING TIMETABLE (revised October 2020) ACRES ± OPTION ESTIMATED TOTAL TOTAL MINED MINED YEARS AREA MINED 100% SLOPES #1 15-25 46. 91 35 .73 32 . 18 3 . 55 2 15-25 46 . 91 35 . 73 32 . 59 . 14 W56- Hribar Pit Amendment 13 November 2020