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7. The 5 h Level portal has 2 portal closures. Rehabilitation of this level will include <br />maintaining the tunnel width integrity originally constructed to accommodate modern <br />equipment. ( See portal photos.) The MSHA approved method of using steel jump sets <br />for realignment of the tunnel will maintain the tunnel width and only slightly modify the <br />tunnel's overhead height commitment, thus leaving enclosures in place in the event of <br />unseen construction challenges in determining the temporary removal or modification of <br />the DRMS interior enclosure. The enclosure will be immediately reinstalled and retro- <br />fitted to steel sets and fireproofed. <br />8. An encapsulation design and location information for DBMS review is provided <br />(attached). Dewatering flows will not be allowed to contact the existing 5 h Level dump. <br />9. See attached Impoundment Study. Patti Turacek and Associates inspected the survey <br />flagged impoundment areas with potential overflow, mine water discharge ditch and the <br />direction of the Impound Supply Line. There will be no dewatering of the mine until the <br />water quality of the mine pool is determined along with the water disposal plan including <br />impoundment development approval by your office. <br />It is understood that impoundments will be MSHA approved impoundments under the <br />guidance of MSHA PROCEDURE INSTRUCTION LETTER NO. 108-IV-1 dated <br />effective 08/26/08 regarding Procedures for Documenting Inspections of Impoundments <br />on Regular (EO 1) inspections occurring during construction through completion of <br />construction.