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are quite large and ought to last far into the next centLiry, even if <br />i demand increases a large amount. <br />GENERAL DESCRIPTION - Because of the smallness of the area tract <br />designations cannot meaningfully be defined. Virtually a.ll the area is <br />used for mining and the sequence used prevents the description of <br />meaningful units. In essence, the mine site is little different from <br />most underground mines where mining activities occur throughout the <br />life of the mine and little reclamation can be done until all work is <br />completed. <br />f1It1ItIG SEQUENCE - In general, the open pit mining produces a deepening <br />of the pit while removing marY.etable limestone. The increase in depth <br />also exposes limestone at the limits of the pit where underground adits <br />can be created for removal of limestone by underground mining methods. <br />Both types of mining are used at most times, but emphasis is usually <br />• placed on one or the other at any moment of time. <br />In mining the Snyder Quarry a particular, precise sequence <br />cannot be defined. Generally though the open pit is mined in a <br />descending spiral fashion. The process occurs in a more •~r less <br />cyclical fashion. The cycle steps can be described in this way: <br />Initial Step - Open pit mining of most of the p~=_rimeter of <br />the quarry with the processing plant in the center. <br />~cle Step 1 - Movement of the processing plant to a con- <br />venient area on the perimeter and within the pit. <br />Cycle Step 2 - Oper. pit mining of 2 lifts of limestone (about <br />40 to C•0 feet) around the pit perimeter except •.~here the ~~rocessing <br />plant rests. <br /> <br />S-D-2 <br />