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While subsidence could potentially impact surface waters at the Southfield Mine, the Division <br />finds no compelling evidence that this has occurred. EFCI has monitored both the Newlin Creek <br />streambed and the City of Florence pipeline for subsidence since 1984. Subsidence has also <br />been monitored at eight subsidence monuments (locations shown on Map 17 of the PAP). No <br />subsidence beyond expected values (Section 2.05.6 of the PAP) has been reported. <br />Cumulative Hydrologic Impact Assessment <br />A Cumulative Hydrologic Impact Assessment (CHIA) was completed for the Southfield Mine <br />and considered the hydrologic impacts of all anticipated mining and reclamation activities in the <br />area of the mine. This CHIA is available under separate cover in the files of the Division. <br />During the current permit term, no activities are expected to alter the results of this assessment. <br />Pursuant to Rule 2.07.6(2)(c), the Division finds the proposed Southfield Mine operation to have <br />been designed to prevent material damage to the hydrologic balance outside the proposed permit <br />area. <br />IV. Topsoil <br />Topsoil resource information is contained in Section 2.04.9 of the PAP. Topsoil handling <br />information is in Sections 4.06, 2.05.3, and 2.05.4. The location of the five topsoil piles <br />that were at the mine site can be seen on Map 14. <br />There were four topsoil piles at the mine site that consisted of topsoil salvaged during initial <br />construction of the refuse area and one topsoil pile at the Newlin Creek Mine. There was <br />no topsoil salvaged for the facility area since it had been disturbed from previous pre -law <br />mining operations. There are no proposed operations that will require further topsoil <br />stripping. <br />Topsoil stripping depths at the refuse pile were four feet. The operator salvaged <br />approximately one foot of A horizon and three feet of B horizon material from this area. <br />Soil analysis indicated little difference between the two soil horizons, as plant growth <br />media. The Division previously determined that there was no need to store the A and B <br />horizon materials separately. The operator was only required to handle these materials <br />separately when live handled. Live handled topsoil was reapplied immediately after <br />stripping. <br />The Division finds that there was adequate topsoil to complete the approved reclamation plan. <br />The operator submitted Technical Revision No. 20 that provided the requested topsoil <br />information required by Stipulation No. 24. Approval of TR -20 resulted in the termination of <br />Stipulation 24. <br />V. Sealing of Drilled Holes and Underground Openings <br />Details of the five portal sealing plans can be found in Sections 4.07.3 and 2.05.4 of the PAP. <br />The mine portals have been sealed by constructing a concrete block wall, and MSHA approved <br />23 <br />