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<br />OPERATIONS <br />2.05.3(6) <br /> <br />Justification for the 20% swell factor is provided in Wyoming <br />Fuel Company's response 2.04.6(1)(b)(i)(C). Pit dimensions by phase <br />are provided on Figure 2 of the April 14, 1981 permit application. <br />A tabulation of the overburden volume per phase is located in Table <br />1, Page 51 of the operation plan. The plan view for each phase of <br />mining can be found on Figure 2, Operation and Reclamation Plan. <br />Cross-sections of the pit are not necessary for determining overburden <br />movement. The production rate of 240,000 tons per year and the 5.5 <br />BCY per ton of coal stripping ratio are coupled with the swell <br />factor to determine the overburden movement. <br />As stated in the Operation Plan, the backfill operation is a <br />continuous cyclical operation that is tied to the production rate. <br />Table 1, Page 51 of the Operation Plan details the overburden quantit- <br />ies involved in the mining and backfill operation. The text concern- <br />ing overburden removal details the equipment to be utilized and the <br />mining and backfill operation. <br />Delays in obtaining the federal coal lease have changed the <br />mining schedule to that shown in Table 1 of this Addendum. Also, a <br />revised reclamation plan has changed overburden movement to that shown <br />in Table 2. <br />2.05.3(6)(b) <br />Because a major portion of the overburden stockpile is temporary, <br />a long term static safety factor of 1.5 is not necessary (Jim Pendleton, <br />September 3, 1981). Therefore, justification of the parameters used <br />in the stability calculations and references cited is no longer <br />relevant. <br />As discussed in our April 14, 1981 application, this stockpile <br />has been stable for at lease 5 years. It is well compacted, has <br />vegetation stabilizing the side slopes and has adequate sedimentation <br />control. <br />2.05.3(8) <br />Wyoming Fuel Company's interpretation of coal processing waste <br />is the waste that is generated from a facility that improves the <br />quality of the run-of-mine (ROM) coal through one of several diff- <br />erent methods of washing (i.e., ultra fine coal, waste water, etc) <br />and the accompanying non-coal waste that is generated (i.e., spent <br />magnetite from heavy media circuits, rocks, etc.). <br />As stated in our April 14, 1981 permit application only coal <br />crushing is done at the Canadian Strip Mine and crushing the coal <br />does not generate waste of any kind. The ROM coal is merely reduced <br />to a smaller size to facilitate handling and customer needs. <br />-7- <br />