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<br />p. 5 <br />Preliminary Adequacy Review - Grassy Creek Mine <br />April 28, 1981 <br />2.05.3(6) Overburden <br />1. The applicant must supply pit dimensions and overburden volumes to <br />comply with this section. Useful information, if available, would be <br />pit cross sections sufficient to determine pit volume, and volume <br />estimations of existing overburden stockpiles which can be compared <br />to the volume of the pit from which the material was excavated. <br />2. Section 2.OS.3(6)(a) requires that a specific blasting plan be <br />provided to demonstrate compliance with the requirements of 9.08. <br />Please provide this plan including all the information required in <br />2.05.3(6)(a)(i) through (vii). <br />2.05.9(2)(b) Reclamation Cost Estimates <br />The cost estimates should reflect a worst case situation. Additional <br />information which should be provided in support of the cost estimates <br />includes haul or push distances, makes and models of equipment to be <br />used, vegetation seed costs (by species), equipment rental costs, <br />equipment operating cost per hour, fuel costs, and labor. Equipment <br />time estimates should be based on standard reference tables (specify <br />those used) and all assumptions and correction factors must be pro- <br />vided. <br />2.05.9 (11 (c) Backfilling and Gradinq <br />1. On page IV-5 of the application, it is stated that "...where surface <br />stability can be enhanced by subtly modifying slipes, this will be done." <br />Please describe a typical situation requiring a "subtle" modification <br />to demonstrate conformance with the requirement of approximate original <br />contour (4.14.1(2)(a)). <br />2. The applicant must provide cross sections of the anticipated final <br />surface of a21 reclaimed areas to comply with 2.05.9(2)(c). <br />2.05.4(2)(d) Topsoil Redistribution <br />1. The text (page IV-S) acknowledges the poor suitability and thin <br />nature (2 inches) of soil unit 10i. Table 3, however, innaccurately <br />list the depth of this unit as 12 inches. This will not significantly <br />affect the situation of Pit b/ due to the relative abundance of unit <br />2/B. This error has a profound effect, however, on the available top- <br />soil situation for Pit p8. The omission of unit 103 from the table <br />results in a total of .4 acre-feet of suitable topsoil to be respread <br />over 8.1 acres of disturbance. This results in a maximum total depth <br />