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for development of Panel 9RT in Exhibit 53), so there is more than adequate time to develop, permit, and initiate <br />the required dewatering activities prior to mining. <br />(2) The use of approved modeling techniques may be included as part of the permit application, but <br />the same surface and ground water information may be required for each site as when models are not used. <br />RESPONSE <br />Modeling of geologic conditions has been utilized to predict subsidence potential; the results of the modeling are <br />set forth in Exhibit 7, Subsidence Predictions. Overburden stratigraphy, uniaxial compressive strength and <br />tensile strength, angle of draw, caving, and flexure characteristics have been modeled using methods described <br />in the Subsidence Engineer's Handbook (NCB Mining Department, 1975). <br />PRI 15-11 2.04-11.1 02/01/16 <br />