Mining Engineering Government Bids & RFPs

Lot 1: ONLY ONLINE BIDS WILL BE ACCEPTED FOR THIS RFB. Emailed and hard copies delivered by any method WILL NOT BE ACCEPTED. On this line, Bidders must enter $ 0. 00 for Contract Amount in the e- procurement system. Actual Contract Amount must be entered on " Official Bid Document" and submitted as an attachment in the e- procurement system. Vendors should review and update, if necessary, all addresses and contact persons for their account prior to bid submission. This information will carry forward to a contract if awarded, therefore please ensure all information is correct. Entire Official Bid Document and Bid Bond ( if required) should be combined as one PDF and uploaded The work will consist of exploration drilling to verify the # 11 seam coal mine and location of rooms and pillars. During the exploration drilling phase, AML employees will utilize a downhole camera to verify current conditions in the mine and to determine the extents of the rock and shale fracturing from the mine subsidence. Once the exploration phase is complete, AML staff will make any necessary adjustments to the proposed hole locations for grouting the coal seam. Six- inch plus diameter 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 with 6- inch diameter PVC pipe. A box utility trailer with sufficient volume capacity, Non- Woven, Polyethylene Geotextile Sediment Filter Bags or an equivalent system shall be used to capture all cuttings from all drill holes to minimize sediment deposits in the yards. Approximately 400 gallons of water will be required to flush each hole. Methane monitoring is the responsibility of the contractor, and if methane is encountered, the contractor must immediately implement a plan to secure the area. This may require the contractor to cap the hole or insert 3- inch diameter PVC casing to a minimum of 10 ft above the ground or as designated by the engineer. A subsidence hole measuring approximately 40ft x 45ft across and approx

Lot 1: ONLY ONLINE BIDS WILL BE ACCEPTED FOR THIS RFB. Emailed and hard copies delivered by any method WILL NOT BE ACCEPTED. On this line, Bidders must enter $ 0. 00 for Contract Amount in the e- procurement system. Actual Contract Amount must be entered on " Official Bid Document" and submitted as an attachment in the e- procurement system. Vendors should review and update, if necessary, all addresses and contact persons for their account prior to bid submission. This information will carry forward to a contract if awarded, therefore please ensure all information is correct. Entire Official Bid Document and Bid Bond ( if required) should be combined as one PDF and uploaded **** Drainage issues have led to oversaturation in the yards of Pauletta Johnson and Ricky Tucker. The project will fix these issues by installing a gabion weir, extending the existing block wall, and installing additional subdrains and ditches. The project site has previously been disturbed by coal mining operations, road construction, utility installation, residential development, landowner activities, and/or high velocity water flows associated with heavy rain events and flooding. These disturbances consist of significant upheaval, mixing, and removal of earthen material from deep excavation, grading, sub- surface drilling, fill material placement, and erosion. There should be no undisturbed earthen material to a depth of several feet at the areas slated for significant project- related construction activities. A cemetery up slope of the fill area will not be affected and the access road adjacent to the fill will be maintained as necessary to keep **** Three mine portals located behind the homes of Randy and Earl Johnson have led to oversaturation of their yards and a small slide. The portals will be corrected using non- wildlife accessible closures due to all portals being confirmed or suspected of being collapsed. AML will use drainage control methods such as subdrains and combination rock ditches to correct the issues. AML will use a