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EXHIBIT D MINING PLAN (cont) <br /> clay beds dip to the east at approximately 45 degrees and the <br /> strike is about N10°30 'W. There are four distinct clay beds with <br /> respect to the quality and color of the end product, or clay used <br /> to manufacture fired masonry brick (see Sketch 1 and Sketch 2) . <br /> These clays fire different colors and have different <br /> characteristics, such as shrinkage. The clay mined from Zone 4 is <br /> the least desirable and is only useable when mixed with clays <br /> from the other three zones . Clay Zone 1 is approximately 49 feet <br /> thick. Clay Zone 2 is approximately 14 feet thick. Clay Zone 3 is <br /> slightly more than 55 feet thick, and Clay Zone 4 is <br /> approximately 35 feet thick. The apparent horizontal thicknesses <br /> are considerably greater, being 70 feet, 20 feet, 80+ feet and 50 <br /> feet, respectively. It is believed that other clay beds extend to <br /> the east of the known bodies . If this is true, the clay mining <br /> may continue to the east until the limits are reached. These clay <br /> beds are likely to vary in quality, color, and thickness as the <br /> clay mining continues to the east . <br /> Underlying the Laramie (K1) is the Fox Hill formation (Kfh) <br /> (see Sketch 1) . The Fox Hill is a sandstone layer of Upper <br /> Cretaceous age. This sandstone is porous and permeable in most <br /> areas within the Louisville quadrangle. There have been no site <br /> specific tests to determine exact figures on porosity and <br /> permeability in the Church Pit area. It is expected that the <br /> vertical permeability native to the sandstone has been <br /> drastically reduced by the clay being worked along its top <br /> bedding plane. A market for the sandstone has been developed, <br /> with the sandstone being mined, processed, and sold. <br /> kl+ <br /> �yM�4s OF r,,FA�f kP _ <br /> West to East Cross-Section Sketch 1 <br /> • <br /> cu.( CLAY CLAY CLAY CtA <br /> . ea. it:pco.+a **1 *'1 3 <br /> Kf XI K1 KI <br /> — 10 3o Yo' <br /> West to East Cross-Section — Detail of Clay —Sketch 2 <br /> Overlying the clays of the basal Laramie is a quartzose <br /> sandstone, also part of the Laramie (see Sketch 1) . Clay Zone 3 <br /> in its upper section changes laterally from clay to sandstone. <br /> Lakewood Brick and Tile CO Church Pit— M-1979-045 <br /> Amendment 02 April 16, 2025 <br /> 9 <br />