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MINING PLAN ~ • EXHIBIT D Icodr ) <br />The Wo - Wormser silt loam, covers the central part of the <br />site and is the area where most of the surface stone will <br />be removed. It is described as a soil formed on sand- <br />stone uplands in silty loess and loamy residuum from the <br />sandstone. Approximately 158 of the Unit is covered by <br />small barren slickspots. These slick spots are where we <br />find some of the stone we market. The Wormser soils <br />cover approximately 26.728 of the mine area. <br />MINING PLAN <br />This site presents a unique set of circumstances when a <br />mining plan is being formulated. For that reason, some of the <br />future end uses for rock is unknown until markets are developed. <br />At this time we are attempting to develop a market for two types <br />of rock from the south area. <br />The first is a surface stone that is found lying in areas <br />around the site. it is found all over the site but is mostly <br />confined to the north along the south rim of the canyons. This <br />stone is commonly called moss rock, veneer stone, paving stone, <br />surface stone, field stone, etc. <br />The second is a slab rock we mine toward the southern end of <br />the site. This stone is used for many of the uses noted above <br />but because it can be obtained in large slabs it is attractive <br />for use as paving, retaining walls, landscaping accents, etc. <br />These described uses only scratch the surface of what we believe <br />the stone can be used for. As markets develop, the end uses of <br />the stone will only be limited by the imaginations of the engi- <br />neers, architects, designers, and landscapers using it. As we <br />define it, slab rock is similar to flagstone. it has some of the <br />same uses as flagstone but is more versatile. This stone comes <br />from the upper part of the Dakota sandstone bedrock covering this <br />area and tends to be fairly flat and uniform. <br />One of the first marketable products we developed from this <br />mine was the slab rock that was first considered a waste product <br />when clay mining began. When first found it was in place over <br />the clay bed as seen in the existing clay mining area. The rock <br />in this area was and is, in strata of varying thickness. The <br />strata ranges in thickness from one inch to more that 15 inches. <br />Generally it tended to be thinner, which had limited uses for <br />landscaping, but was good for use in veneer installations. <br />The second is surface field stone found exposed on the mine <br />site. This is sandstone but differs from the mined rock. It is <br />9 <br />