Specifications include, but are not limited to: The proposed Gwen Smith Subsidence AML Reclamation Project is located within Madisonville city limits in Hopkins County KY. GPS coordinates for the residence are North 3718'41.10", West 8729'26.03". The project will grout remaining voids in an AML eligible underground coal mine in the #11 Coal Seam. The Gwen Smith residence has been damaged by mining subsidence and/or mining influenced slope instability. The work will consist of exploratory drilling and logging the drill core to verify the # 11 seam coal mine location of rooms and pillars and to verify which pillars have collapsed and to determine the extents of the surface expression of the mine subsidence. Once exploratory drilling is complete, AML staff will make any necessary adjustments to the proposed hole locations for grouting the coal seam. Six-inch holes will be drilled to the #11 coal seam in the specified order. The hole will be cased through the soil horizon into solid competent rock. Four grout mixes have been specified and methods of placement of grout will be evaluated for effectiveness and may consist of a pumper truck or a surface funnel. The strata may dictate that a pumper truck and Tremie tubes may be the most effective method. Verification drilling will be required after the initial grouting sequence. Additional grouting may be required and the drill rig should remain on-site during the entirety of the project. Additional remobilization costs will not be covered. Other work includes site preparation, repair of landscaping, fences, driveways, sidewalks and other features disturbed during the construction process. An onsite waste area is designated, but items not suitable for disposal on site must be taken to a landfill. Public neighborhood roads and driveways damaged in the course of the project will be repaired with bituminous pavement overlays. Standard AML revegetation methods and best management practices for silt control will be used.
