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2019 Plan of Operations Modification American Gypsum Company, LLC <br /> Drawing 15: Mine Office and Staging Area Facilities <br /> Drawing 16: Haul Road Planning <br /> LIST OF APPENDICES <br /> Appendix A: Confidential Information <br /> Appendix B: Mining Claim Fee Receipt <br /> Appendix C: Quality Assurance Plan <br /> Appendix D: Hydrology and Hydraulics Design Support <br /> Appendix E: Geotechnical Investigation and Slope Stability Analyses <br /> LIST OF ACRONYMS <br /> American Gypsum American Gypsum Company, LLC <br /> amsl above mean sea level <br /> AN/FO ammonium nitrate/fuel oil <br /> AQ Air Quality <br /> BLM Bureau of Land Management <br /> BMP Best Management Practices <br /> CCR Colorado Code of Regulations <br /> CDPS Colorado Discharge Permit System <br /> CFR Code of Federal Regulations <br /> CO DRMS Colorado Division of Reclamation and Mining Safety <br /> CO DNR Colorado Department of Natural Resources <br /> CO DWR Colorado Division of Water Resources <br /> CPR Cultural and Paleontological Resources <br /> CRVFO Colorado River Valley Field Office <br /> D50 Mass Median Diameter <br /> OF degrees Fahrenheit <br /> FHWA Federal Highway Administration <br /> FWPH Fish, Wildlife, and Plant Habitat <br /> H:V Horizontal:Vertical <br /> HEC-HMS Hydrologic Modeling System <br /> 1-70 Interstate 70 <br /> Mine Eagle-Gypsum Mine <br /> Modification Plan of Operations Modification <br /> NEPA National Environmental Policy Act <br /> NOAA National Oceanic and Atmospheric Administration <br /> NPDES National Pollutant Discharge Elimination System <br /> NRCS Natural Resources Conservation Service <br /> QAP Quality Assurance Plan <br /> Am Gypsum Poo Mod ISSD 20190909 September 2019 IV] <br />