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<br /> <br />u <br />Mining Plan <br />This mine has previously been worked to the eas <br />area outlined on the map which started in 1961. The <br />mined is in the northeast part of the affected area. <br />in drips running north-south and as each north-south <br />a hew strip is then started to the immediate west of <br />mined strip. <br />Geology <br />t of the affected <br />area now being <br />Mining is directed <br />strip is completed, <br />the previously <br />The clay at this mine is in horizontal layers. Thickness of the <br />clay averages 24 feet and is covered by 6 to 18 feet of coarse conglomerate. <br />Mining Plan <br />The clay is mined by working small pits about 125 feet wid= by <br />250 feet long. The rocky overburden is removed with a dozer and is <br />pushed ou.t on three sides of the pit. Then the clay is pushed out <br />of the pit into a stockpile on the remaining side which is usually <br />to the north. No further work is done until the stockpile has been <br />depleted by trucks hauling the clay to the plant. It usually takes <br />about nine months to deplete a stockpile. At this point in mining, <br />the pit is 25 to 30 feet deep. <br />The next pit to be worked is adjacent to or behind the previously <br />worked pit. The old pit is then filled with the overburden covering <br />the new pit. Working in a grid pattern, each pit is filled wits <br />rocky overburden, leaving a five to 8 foot depression. <br />CJ <br />