REV11086 - Laserfiche WebLink

Home Browse Search

Site Construction, Operation and Reclamation The project will be very similar to that which had previously taken place for current borehole sites. Overall, the sites will be accessed via the pre-existing Beaz Creek canyon ranch road. New road segments will be constructed using sidecast construction techniques, cutting and filling as needed to achieve a typical road width of about 10 - 14 feet, averaging 12'. The pad sites will be approximately 80 feet wide and 130 feet long or 0.24 acres. Any salvaged topsoil will be stockpiled adjacent to the pad. Drill fluids will be collected in mud pits. (Approximately, 8'D x 10' W x 40'L in size) After the borehole casing has been completely set, a skid mounted methane pump will be installed over the well head. The pump will be operated with the methane drawn from the mine, and any excess gas will be vented into the atmosphere. Unless otherwise requested, the borehole will be sealed and the new roads and borehole pads reclaimed in accordance with the procedures further described in the PAP or in accordance with the applicable regulations. Threatened and Endangered Species Assessment, Cultura- Resources Assessment A block clearance cultural resources assessment titled "Class III Cultural Resources Inventory of the Block Cleazance Area Project" prepazed August 26, 2005 by Grand River Institute has previously been submitted to DMG. This proposed GVB project will not effect any areas of concern noted in this report. A "Block Biological Cleazance Project" prepared in August 2005 by Monazch and Associates covers the project azea. A copy of the report has previously been forwarded to the Borehole Completion Each borehole will be drilled 12 '/< inch diameter to approximately 20 feet above the coal. 9 5/8 inch steel casing is cemented into the hole to approximately within 100' of the coal. 7 inch slotted steel casing will be installed to within 10 feet above the coal. Approximately 60 - 100 feet of the slotted 7 inch pipe will be extended up or overlap into the 9 5/8 inch casing. Drainage and Sediment Control The drainage and sediment control system for the Elk Creek mine gob vent boreholes will be consistent with the previously constructed Sanborn Creek Mine gob vent boreholes. The drainage and sediment control for the Elk Creek Mine borehole sites will be managed as a small azea exemption with alternative sediment control provided by a combination of perimeter sediment control berms/ditches and installation of straw bales, straw waddles or silt fence, etc. to reduce flow velocity and trap sediment. To facilitate the control of upland drainage, if the site is suitable, an upland clean water diversion will be constructed to reduce overland flow into the effected azea. Permit Map 2.05-M4 (4"' sheet) Drainage and Sediment Control Plan provides a typical example of a drill pad lay out. Exhibit 2.05-E3, Drainage and Sediment Control Plan, Section 9, Revised ared New SAE's and Alternative Sediment Controls provides typical designs • Page 2