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Amended Lbi?ited Ltnhuet 110 Operation Permit Application E_cltibits <br />Robins Rork Pit - Robins ('onst?'uctinn, L.L.LP <br />The Robins Rock Pit has already been stripped of "top soil," and mining excavations and deposit <br />processing(s) are well underway. Materials being excavated undergo a cleaning process. All fine <br />materials will be separated with a power screen, and this material will be added to the topsoil <br />stockpile. The topsoil stockpile will be located in an area on the east side of the southern portion <br />of the permit boundary near the location of the abandoned/filled irrigation pond, and can be seen <br />on maps provided in Exhibit E. Drilling operations in progress are based on a pattern of 3 feet by <br />5 feet drilled to a depth of approximately 18 feet. Drilling has resulted in a highwall along the <br />north and west perimeter of the pit, so a barrier of large rocks has been placed along the <br />perimeter to prevent livestock and human traffic from accidentally falling into the excavated <br />area. The loading area is located at the bottom of the hill within that part of the permit boundary <br />added this year, and the purpose for this amended permit. Rock processing will also be located in <br />this area. Product will be moved from the loading area to the nearby Conejos County Road H via <br />an existing 20 -foot wide gravel road. No further improvements to this haul road are anticipated. <br />Mining operations are estimated to process approximately 50,000 tons per year. <br />a) Mining will commence in September, 2014 and should end by December, 2024. <br />b) The operator commits to salvaging or importing fine materials from the Robins Gravel <br />Pit (M -2002 -014) for enough topsoil to replace 6 to 12 inches throughout the site during <br />reclamation. This soil will be placed in separated stockpiles at the base of mesa on the <br />south end of the site. <br />c) There will be no overburden or waste rock after the initial topsoil is removed. <br />d) It is anticipated that mining direction will be into the side of the mesa near the top cliffs <br />of basalt rather than down into the ground. Excavation into the hill will be well within the <br />permit boundary, and depth from the top of the hill should not exceed thirty (30) feet. <br />Under no circumstances will excavation reach a depth below the surface of the irrigated <br />field south of the permit boundary. <br />e) Major components of this mining operation are shown in the maps provided in Exhibit E <br />and will include the following: <br />• A twenty foot wide access road from the base of the mesa to the top of the mesa. <br />• A 300'x150' area at the base of the mesa and south end of the permit boundary <br />for a concrete and asphalt batch plant. <br />f) Significant disturbances to the land will be limited to side of the mesa within the permit <br />boundary. <br />g) An existing 20' gravel road is the only will be the only road serving this mining <br />operation. The gravel road extends from the top of the mesa, through the entry, around <br />the field south of the permit boundary, and on to Conejos County Road H. There are no <br />new improvements, or proposed roads included in this project. <br />Prc'pc rcd By Strll:l'tit Lu inecrir ? Co <br />Job Aw ?fiber: 446 i Page 18 of 73 <br />