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Bureau of land Management <br /> Colorado River Valley Field Office <br /> IV <br /> Minerals Inspection Report <br /> plan submitted by Mid-Continent Resources, Inc." Haul trucks are currently weighed on a digital scale located <br /> on the south side of the mill building. I drove into the quarry on the Lower Road. <br /> Upon my arrival at the mine office,Justin,Auggie,Travis,Amy,and I discussed the Mid-Continent Quarry's <br /> permitting history and my plans to review the proposed Plan of Operations,which was delivered to the BLM in <br /> several submittals.Once I hear back as to whether the operator would like to submit additional information <br /> and plans in their proposal, I will review the plan for completeness according to 43 CFR 3809.401.Justin stated <br /> CaIX's intent to propose developing a septic system and leach field,an office with indoor plumbing,and drilling <br /> a water well or installing water utilities from the City of Glenwood Springs. I informed him that proposed uses <br /> within mining operations on public lands will be considered if they are reasonably incident to mining(per 43 <br /> CFR 3715.2). <br /> Additionally, records of approvals for the permitted boundary vary between the BLM and DRMS.On June 3, <br /> 1992, DRMS approved Amendment 2,which extended the permit boundary and increased the permitted area <br /> from 15.7 acres to 34.4 acres(other DRMS records state a permitted boundary of 32.78 acres) in order to <br /> include an area affected by crusher fines washout from the lower bench of the quarry.There is no record of <br /> this proposal or its approval in BLM records. BLM records reflect an approved perimeter area of 15.7 acres <br /> from the 1989 Amendment 1,which was approved by the BLM on July 21, 1989.When measured by aerial <br /> imagery in ArcGIS,the currently disturbed area is calculated to be approximately 17.5 acres.The proposed CaIX <br /> Plan of Operations Modification should include this permitted area increase in order for both agencies' permits <br /> to be current and accurate. <br /> After our discussion,Justin,Auggie,Travis,Amy,and I walked around the operation.We began on the mill <br /> bench and observed the sediment retention ponds and stormwater drainage system at the southwest corner <br /> of the disturbed area.Water from recent storms was present in two ponds(Photo 3).The sediment retention <br /> ponds were in the process of being reconstructed.While the pre-existing pond,which was regularly cleaned <br /> out with an excavator,was formerly located at the corner of the bench,the area will now include multiple <br /> ponds at an elevation lower than the mill bench in order to facilitate stormwater transport to the existing <br /> unnamed drainages to the south of the operation. Neither the 1982 Plan of Operations nor the 1989 <br /> Amendment 1 address stormwater diversion or storage; however,the 2015 Colorado River Valley Field Office <br /> Resource Management Plan,Appendix K—Best Management Practices(BMPs)and Conservation Measures <br /> states: "MIN-17: Before activities take place, every pad, access road,or facility site will have an approved <br /> surface drainage plan (storm water management plan)for establishing positive management of surface water <br /> drainage,to reduce erosion and sediment transport.The drainage plan will include adaptive BMPs, monitoring, <br /> maintenance and reporting. BMPs may include run-on/run-off controls such as surface pocking or <br /> revegetation,ditches or berms, basins,and other control methods to reduce erosion. Pre-construction <br /> drainage BMPs will be installed as appropriate."The BPMs also state:"MIN-24:As detailed in the site plan for <br /> surface/storm water management,drainage from disturbed areas will be confined or directed to minimize <br /> erosion, particularly within 100 feet of all drainages. No runoff,including that from roads,will be allowed to <br /> flow into intermittent or perennial waterways without first passing through sediment-trapping mechanisms <br /> such as vegetation,anchored bales or catchments."Additionally, per 43 CFR 3809.420(b)(5): "all operators <br /> shall comply with applicable Federal and state water quality standards, including the Federal Water Pollution <br /> Control Act,as amended (30 U.S.C. 1151 et seq.)." CaIX holds a stormwater permit with Colorado Department <br /> of Public Health& Environment Water Quality Control Division. <br /> Page 2of10 <br />