2023-01-10_PERMIT FILE - M2023001 (9)

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Affected Acreage Mining Plan Area acres Mined Area 72.10 Access Roads 0.70 Disturbed Land 12.37 TOTAL 85.17 Various setbacks from adjacent roads, adjacent structures, and oil and gas infrastructure will be maintained as mining occurs. All setbacks specified in the surface use agreements with the oil/gas companies will be followed. The final executed agreements are expected to be obtained in the near future and will be forwarded to the Division when they are available. A minimum 200 foot setback from any existing oil/gas facility will be maintained until that time. See Exhibit C, Mining Plan Map, and the Slope Stability Report for the mining limit configuration and information on setbacks and their locations. The mineral deed (attached) also requires that no surface facilities are to be located on this property. The abandoned wells would be cutoff after mining has reached the bedrock surface or the reclaimed slope surface where a new cap and any additional concrete for the existing plug would be needed. McCarty Engineering, LLC has provided this service for J-2 Contracting and at other mining permit locations for other operators. They are licensed and bonded to obtain approvals from the COGCC to do these types of re-plug services on abandoned oil and gas wells. Products Sand and gravel will be the primary product produced from the Sunset Industrial Pit. The principal intended use for the sand and gravel is for road base and construction aggregates. Subsurface drilling and testing have verified that the Sunset Industrial Pit property contains a significant commercial deposit of sand and gravel. The depth of interbedded sandy clays and clayey to silty sands at the surface range from 0 to 14 feet. The thickness of the aggregate material ranges from 40 to 107 feet where bedrock contact occurs. Mining Methods The deposit will be dry mined and slurry walls will be constructed around the perimeter of the mining area for Phases 1 and 2. Mining will not expose groundwater prior to the slurry wall being constructed around each phase. Design specifications for the slurry wall and quality control procedures used during construction will ensure that the reclaimed reservoir meets State Engineer's Office (SEO) performance standards. Dewatering trenches will be excavated around the perimeter of each mining area prior to mining operations commencing. The depth of the ditches will vary as the mining progresses deeper into the alluvium in order to maintain the groundwater level below the active mining bottom surface, and therefore minimize the exposed groundwater surface area. The dewatering ditches will flow to a collection pond, from which the water will be pumped and discharged into recharge areas where overflow will reach a culvert that crosses 8th Street into the Ogilvy Ditch and ultimately reach the Cache La Poudre River. The equipment and facilities may include, but are not limited to the following: JET Consulting,Inc.Inc J-2 Contracting Company Sunset Industrial Pit DRMS 112 Permit Application