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EXHIBIT D MINE PLAN <br /> 1. General Mining Plan <br /> • Map C-2 shows the current conditions of the Siskin Pit; all maps are located in Appendix 1. <br /> Mine access is via CR 344. The total mined area will be 77.5 acres; the total affected and <br /> disturbed area to be reclaimed is 77.5 acres; the haul road and associated Right of Way is 8.2 <br /> acres and will be excluded from reclamation; and the permitted acreage will be 85.7 acres. The <br /> permit area is currently unfenced. Property corners are marked by white stakes. Fencing may be <br /> erected as necessary for wildlife and livestock conservation. <br /> The Siskin Pit will produce decorative stone gravel and pozzolan—a cement additive—from <br /> Tertiary Rhyolite overlain in some areas by Miocene Pringle Latite and the upper part of the <br /> Pliocene and Miocene Santa Fe formation. The rhyolite formation is underlain by Precambrian <br /> Migmatitic Gneiss. Topsoil is expected to be 6-10 inches thick with 0-24 inches of variably thick <br /> Miocene Pringle Latite and unconsolidated soils and gravels as overburden. <br /> Mining activities are expected to occur intermittently throughout all months of the year and <br /> processing operations, which include washing (optional), screening and crushing of gravel, will <br /> occur concurrently. Mining will occur to the phase limits shown on Map C-3 and will progress as <br /> shown on the Exhibit C maps. <br /> Expected annual average production is 200,000 tons. Actual production rates will fluctuate based <br /> . on market conditions. The estimated life of mine is 64 years. <br /> 6.4.4(a) <br /> The majority of the site and all bedrock material will be mined using drill and blast techniques as <br /> the deposit has been mined prior to this amendment. There will be no changes to the current <br /> blasting procedure. In general, each new mining phase will be mined by first excavating <br /> vegetation and 6-10 inches of topsoil. If overburden is encountered, it will also be stripped and <br /> stockpiled for reclamation. After topsoil and potential overburden is removed, the underlying <br /> bedrock will be drilled and blasted to a specified rough sized product transported to the onsite <br /> processing area, processed, and sorted. Each subsequent bench will be stripped just in time to <br /> create the next new working bench. <br /> Siskin Pit Lewicki&Associates <br /> January 2024 D-2 <br />