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. 7.0 Operating Plan <br />This section provides the information required by Section 2.05 of the Rules and describes the design, <br />reclamation, and monitoring of the RPE East. <br />7.1 Operating Plan — Permit Area (2.05.3) <br />MCC's expected daily rate of coal refuse production is expected to be approximately 2,000 to 2,500 <br />tons. Refuse will primarily be generated from the coal preparation plant (CPP) and conveyed to the <br />refuse bin located on the RPE east of the CPP. From this bin, approximately 5 to 6, 20 yard <br />truckloads per hour will be taken to the RPE East. An average of 300,000 tons per year of coal <br />refuse is expected to be compacted into the RPE East refuse pile, with a maximum of 500,000 tons <br />anticipated in any given year. <br />7.2 Monitoring Plan <br />A monitoring plan for determining the geotechnical characteristics of the future refuse material and <br />for general monitoring of seepage and stability conditions within the refuse pile are described in the <br />following sections. <br />7.2.1 Refuse Geotechnical Characteristics <br />As discussed in Section 2.2.3.3, it is anticipated that testing will be performed on refuse material <br />after the CPP operations commence. This testing will be performed to verify that the material going <br />into the refuse pile is indeed more favorable from a geotechnical standpoint than the minimum <br />criteria established for the refuse pile design in Section 2.2. While the criteria primarily relate to <br />shear strength, the permeability and unit weight characteristics will also play a role in the stability of <br />the refuse pile. <br />It is anticipated that samples of the CPP refuse material will be collected at the plant in the initial <br />stages of operation to better characterize the material and to confirm that the geotechnical parameters <br />of the material are similar to those used for the design. Characteristics might include, but are not <br />limited to, grain size, moisture content, and Atterberg limits (mineralogy) in addition to shear <br />strength, permeability, and consolidation tests. The time frame for initial sampling and testing is <br />expected to be in the first six months of the CPP operation. Additional periodic sampling and review <br />should be performed approximately every six months for the first two years of operation. After the <br />first two years, additional testing may not be needed if refuse material has been reasonably uniform. <br />P:\Mpls \06 CO \26 \06261003 MCC Refuse Pile Site Review & Permit \WorkFiles\Permit Application \Text \2010- 04- 19_RPE East Permit Application.doe29 <br />