2024-11-22_REVISION - M1999120 (4)

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MINING PLAN EXHIBIT D (CONT) For example, between 2012 and 2024 many of the wells and facilities on the south area have been removed and the reservoir areas adjusted to show those changes. Many additional changes are expected in the future similar to this example. As mining progresses through the mine and into a new area it may be to our advantage - or we may be required by law to allow oil and gas companies or ditch companies to exercise their rights - to revise the shapes of the reservoirs due to changes to their facilities, gaslines, wells or drilling pads or ditches. These changes may affect reservoir shapes, combine or split reservoirs, add or subtract oil and gas operations areas, gas lines, ease- ments, etc. Therefore, we are presenting these optional plans to cover the possibilities with the understanding that the mining and reclamation methods will remain unchanged, but the configurations and areas of the mined and reclaimed areas may change. Optional Mining Plan. Option A - The mining areas shown on the large map on EXHIBIT C-1 MINING PLAN MAP is Option A. This option shows the most conser- vative (and current) mining plan and it assumes no further changes to the location of ditches, oil and gas wells, gas lines or facilities before mining ends. Option B - The smaller map inset in the upper corner is Option B and is a more optimistic plan showing removal or reloca- tion of numerous wells, gaslines and facilities to allow removal of more gravel and increase the amount of water storage on the site. For Option B, the South Area remains as originally planned in 2012 but the new north area may have the ditch moved between Northeast Phases #2 and #3 to create one large reservoir. Mining Methods overview The working face will be mined near vertical to maximize removal of material from the mine. At the widest point, the longest working face will be approximately 1,700 feet long. If mining ended prematurely, this slope will be reclaimed using a cut/fill sloping method instead of backfilling. As mining reaches a setback limit, backfilling will commence within 3 to 6 months maximum so as to leave a 3:1 slope along the mine exterior, oil and gas facilities and the ditches. No more than 2,000 linear feet of side slope highwall area will need backfilling at any-one- time. This can be done because we plan to start backfill sloping whenever a new area is stripped so the material only has to be handled once. The mining setbacks will vary from 15 to 275 feet from the permit boundaries, structures and river as allowed by each use agreement of geotechnical analysis for said structures. No mining will be done in the setback areas but they may be disturbed as mining and reclamation progresses thru a phase. For example, around oil/gas wells we will maintain an eighty (80) foot radius around each well head when mining, but leave a 150 foot radius when reclamation is complete. EXHIBIT C-1 -MINING PLAN MAP shows how this will look. L.G.Everist, Inc. M-1999-120 Ft.Lupton Sand and Gravel November,2024 5