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Response <br />Colowyo continues to utilize the "State Plane Coordinate <br />System" as the grid system for sampling regraded overburden <br />areas. Refer to Exhibit 15. 1993 Annual Report Map, for the <br />location of the sampled areas. Use of the intersecting lines <br />provide a uniform square grid system of approximately five <br />acres per square. During 1993 a total of 20 regraded area <br />samples were taken representing approximately 100 acres of <br />additional regraded overburden area. The analyses are <br />included in Exhibit 14, Overburden Data - Reclaimed Areas. <br />No suspect materials were encountered during the sampling <br />program. <br />6. REVEGETATION MONITORING <br />Requirement <br />Rule 4.15.1(4) of the Colowyo Permit contains a plan for <br />monitoring the success of revegetation. <br />Response <br />During the summer of 1993, Colowyo completed vegetation <br />monitoring on the following areas: <br />A. Herbaceous Frequency and Density of the 1992 Revegetated <br />Area <br />B. Herbaceous Cover of the 1984, 1987 and 1990 Revegetated <br />Areas <br />Refer to Exhibit 15. 1993 Annual Report Map, for <br />additional details as to the location of these areas. <br />• g <br />