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Figure MP-6 <br />Historical Mass Sliding Cause <br /> <br />6" clay layer (slip zone) <br />ML <br />PPG <br />AL <br />ML ~\ PS <br />Structure before any mining. <br />Unredaimed limestone surface <br />with fractures to day zone. <br />• PPG \\SS <br />PPG \ \ ML <br />PS <br />Post Air Force Academy Condition <br />(Condition when Castle Concrete entered site) <br />PPG =Pikes Peak Granite <br />SS = Saguache Sandstone <br />ML = Manitou Limestone <br />PS =Pierre Shale <br />AL =Recent Alluvium <br />F~ctent of Castle Concrete Mining <br />/ (average sbpe; benches not shown) <br />Clay zone removed <br />PPG <br />1\ PPG\\ML ~ `~ . <br />Post Mining Condition -Reclaimed <br />(Note: Figures are not to scale and are highly diagrammatic.) page 21 <br />