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<br /> <br />London Mountain Clean Up <br />July 2025 D-4 <br /> <br /> <br />2) No potentially acid-forming waste pile material may be stockpiled at the waste pile location once <br />it has been excavated from its original source. All potentially acid-forming waste pile material <br />must be hauled to the London Mine 110D operation for further processing. <br />3) All hauled waste material will be hauled via haul trucks. <br />4) No potentially acid-forming waste material is allowed to remain at a site once the isolated pile <br />containing the material is disturbed. <br />a. If a waste pile is within sediment control for an area but separate from other piles by at <br />least 10-ft, the pile will be considered isolated. <br />b. Once a part of an isolated pile is disturbed, 100% of the disturbed or exposed potentially <br />acid-forming waste material must be removed from the site and transported for offsite <br />processing and/or disposal. <br />c. Non-potentially acid-forming material from an isolated pile may be replaced onsite or <br />hauled offsite. <br />3. Mining Timetable <br />The mining timetable for this operation are highly variable. It depends entirely on the total number of <br />piles that are found and excavated. In general, it is anticipated that no more than 10 years will be <br />necessary to successfully excavate and reclaim all of the likely piles within the watershed. <br />4. Mining Plan for Each Mining Environment <br />Each mining environment will have additional requirements to ensure mining properly salvages growth <br />medium and maintains environmental protection. <br /> <br />Trees will be mulched. Topsoil will be stripped to its full depth and salvaged. Salvaged topsoil will be <br />stored either in a separate area near the waste pile being mined or stored at one of the designated <br />locations shown on Map C-2. Topsoil underlaying potentially acid-forming material will be hauled to the <br />London Mine 110D operation for processing or hauled offsite for disposal at a licensed landfill. Loose <br />native material adjacent to the waste pile that has been disturbed will be hauled to the London Mine <br />110D operation for processing. <br />Topsoil and non-bedrock material may be excavated from near a waste pile to support reclamation. <br />Such borrow material may only be used for reclamation of waste pile areas. <br /> <br />Any topsoil will be stripped to its full depth and salvaged. Salvaged topsoil will be stored either in a <br />separate area near the waste pile being mined or stored at one of the designated locations shown on <br />Map C-2. Any topsoil underlaying potentially acid-forming material will be hauled to the London Mine