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Results of subsidence monitoring will be submitted semi-a~uuaally. These submittals <br />shall include, when appropriate a comparison of the field date and the predicted amount <br />of subsidence. The Structures Inventory Map (Map 16) shall be updated as accessary to <br />reflect any such changes. Results of previous subsidence surveys can be found in Exhibit <br />24 -Subsidence Monitoring Data and Control Plans. Future submittals will he <br />incorporated into this exhibit. <br />2.05.~61(dl Division Review of Determination of Material Damage or Diminution <br />of Valuc <br />2.05.6(61(el Subsidence Survey <br />(e) (i) (A) Mining Methods: Mining methods used included Development Mining of <br />Pillars with limited extraction ratios, Room and Pillar Mining, and Longwall Mining. <br />(e) (i) (B) Geologic Description: The mine azea is situated in the Park Plateau, a <br />subdivision of the Great Plains physiographic province which separates the High Plains <br />to the east from the Rocky Mountains to the west. Rocks exposed in the region range in <br />age from Precambrian to Quatemary, although only the Raton formation and Quaternary <br />deposits are exposed in the area. <br />The Cretaceous-Paleocene, Raton formation forms the bedrock within the mine area. It <br />rests unconformably on the Vermejo formation and has a total thickness of 1200 to 1600 <br />feet. The base of the Raton consists of a buff to gray pebble conglomerate a few inches to <br />a few tens of feet thick. Bedding within the basal conglomerate is not prominent, but <br />cross lamination may be locally well developed. Most of the Raton formation consists of <br />very fine to medium grained sandstones, interbedded with gray to dark gray siltstones and <br />shales. <br />(Revised 09/16/97) <br />(Revised 05/18/94) <br />2.05-56 <br />~~ <br />