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III <br /> M-2001-001 Line Camp Pit Amendment#2 (Expansion) <br /> Exhibit D. MINING PLAN (6.3.3.) FOR OPERATION <br /> SITE DESCRIPTION AND PREVIOUS MINING HISTORY:The site consists of alluvial sand and gravel deposits <br /> of twenty or more feet thickness overlaying bedrock of the sedimentary Morrison Formation. Mining on <br /> the site began in 2003 and has been more or less continuous since.The pit was expanded in 2012 by AM- <br /> 1 and a partial reclamation release. As of 2024, the entire area of the pit has been mined as feasible, <br /> except for the current plant site and areas immediately adjacent to the access road. Continued demand <br /> for construction materials in Montezuma County is recognized and the BOCC has approved this AM-2 <br /> expansion. <br /> TOPOGRAPHY: Bottom of river valley, delineated by SH-145 embankment (former railroad grade) and <br /> berms constructed for visual, noise, dust, and water control purposes as part of mining since 2003. <br /> Prior to mining, the property was irrigated cropland (pasture) watered by the Home Ditch (Dolores River <br /> Priority #3), which has been partially converted to use for evaporation from ponds and processing <br /> (washing) and export of construction materials. The permit and affected land boundaries have been laid <br /> out to avoid almost all wooded areas, the riverbank, and areas with wetlands and other sensitive areas <br /> along the river, thus creating conservation buffers and protection against bank erosion and pit capture. <br /> The original ranch access was replaced in 2003 with the current CDOT-permitted access road which will <br /> continue to be used.There is a 100-foot buffer zone on the southeast side of the site between the existing <br /> affected land (excavation and slope to pond) and the riverbank (OHWM). All of the proposed expansion <br /> area excavation is greater than 350 feet from the OHWM. <br /> GEOLOGY AND SOILS: (Exhibit I for additional detail) <br /> SOIL: Depth, type, and handling/preservation: similar to current permit area and to be handled <br /> similarly. <br /> OVERBURDEN: Including materials to be separated from Pitrun, depth, type, and <br /> handling/preservation/use: similar to current permit area and to be handled similarly. <br /> BEDROCK:Type and depth to material to NOT be excavated and used for Pitrun: Morrison formation <br /> sedimentary rock will be left in place as bottom of ponds and to place soil on. <br /> AIR QUALITY AND WEATHER/CLIMATE: (Exhibits K and M) <br /> Excellent air quality in area; climate and weather generally dictates seasonal operations be limited in <br /> wintertime due to snow accumulations and low temperatures. Location in the floor of the valley limits <br /> sunlight available year-round. <br /> WATER: (details at EXHIBIT G) <br /> SURFACE: Including ponds,flooding and wetlands—the entire site is in or very close to the 100-year- <br /> frequency floodplain but outside the floodway. There are no natural wetlands on either the existing <br /> or expanded area. All existing and proposed ponds are incised and not impounded. <br /> UNDERGROUND: No registered or known water wells within 660 feet of the existing or proposed <br /> areas. The original and amendment applications addressed drawdown and no significant impact was <br /> noted. <br /> RIGHTS AND QUALITY, STATUS OF BASIN: The water in ponds (evaporative loss) and water used for <br /> washing, dust control, and shipped with construction materials is provided by decree from water <br /> rights originally obtained for irrigation, and converted to industrial/recreational use by water court <br /> decree. <br /> VEGETATION: (Exhibit J) <br /> 5182-22-001 WASTELINE, INC. Page 19 of 65 <br />