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<br />4.3 Surface Subsidence Effects <br />Joe Shoemaker, Chief Surveyor, reviewed the active subsidence area in mid-September <br />1993. He noted limited surface subsidence cracking near the end of the 2 East longwall <br />panel. There were approximately six surtace cracks, with up to 4 in of horizontal <br />displacement, oriented parallel with the longwall face. No vertical offsets were noted for <br />these cracks. <br />