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• However, since TS 1 is dedicated for reclamation of the temporary bypass road leading to the existing landfill, and since Montrose County has requested that the temporary bypass road and TS 1 be retained for their use, the volume of topsoil in TS 1 is not included in the replaced topsoil depth calculations. Stockpiled Topsoil Reserves All existing (10 total) and proposed (2 total) topsoil stockpile locations are shown on the enclosed Topsoil Balance Plan, Exhibit 9-3. There has been no change since October 1983 in the volume of topsoil at seven stockpile locations (1, 2, 3, 4, 6, 7, and 8). These topsoil stockpile volumes were determined by IntraSearch, Inc. utilizing photogrammetric surveying techniques. Topsoil Stockpile 1 is dedicated to Montrose County for reclaiming portions of either the temporary by-pass road or the landfill. Stockpiled topsoil and the associated underlying undisturbed soil from Stockpile 5 was moved by scrapers to • Stockpile No. 13. Existing topsoil stockpiles 4, 6, and 7 are also scheduled to be relocated to topsoil stockpile locations 13 or 14 to accommodate advancing mining activities in Area 1. The soil volumes for Stockpiles 9, 10, and 13 were calculated from representative cross sections supplied by the Peabody Engineering Department. The current topsoil volume for each stockpile is presented in Table 9-3-1. Existing Disturbance Area The existing disturbance areas at Nucla Mine are associated with three separate Colorado mining regulation periods. The old shop area and existing spoil piles and pits associated with Mine Area 4 (see Exhibit 12-1, Operations Plan) and the eastern half of the new facilities area are included in Period 1 which extends from July 1, 1969 through July 1, 1976. Topsoil salvage and replacement were not included in the reclamation plan for these pre-law areas. Period 2 includes existing post-law (July 1, 1976) disturbance areas at Nucla Mine which fall under n U 9-3-6 Revised 07/26/88