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Doc Date;lyt 20/„ ~, <br />1998 GEOTECHNICAL DRILLING PROGRAM (MR#244/245) <br />SYLVESTER GULCH FACILITIES AREA <br />n <br /> <br />• <br />SCOPE OF WORK <br />Mountain Coal Company (MCC) proposes 24 boreholes for the 1998 Geotechnical <br />Drilling Program to be completed in Sylvester Gulch and the Lower Refuse Pile area to <br />investigate future building sites. Drilling will begin July 6, 1998, and is estimated to be <br />completed by September 30, 1998. Some of the boreholes will be completed as <br />inclinometers or piezometers, and the remainder will be abandoned. <br />Drilling Program <br />Twenty-four (24) soil borings are proposed for this drilling program. Seven (7) holes <br />will be completed as piezometers and four (4) holes will be completed as inclinometers. <br />The holes will be drilled with an approximate 7-inch outside diameter, hollow stem <br />auger. The piezometers will be completed to a one-inch (1) diameter and the <br />inclinometers will be completed to athree-and-a-half (3 %i) inch diameter. The <br />piezometers and the inclinometers will be cased with PVC. A truck mounted CME 75 <br />drill rig will be utilized to drill the holes. No water will be used in the drilling process, so <br />mud pits will not be required. All soil borings and roads will be located outside of areas <br />designated as wetlands. <br />Earthwork and Sediment Control <br />To the extent possible, existing roads, including drill roads constructed last year under <br />MR#218, will be utilized to access the soil boring sites. However, some additional <br />roadwork will be required for access. The locations of the new roads are identified in <br />green on the enclosed map. The roadway will be approximately 10-feet wide. Lengths <br />of new roads are provided on the summary table. No drill pads will be necessary, as the <br />holes will be drilled along the roads. Vegetation will be removed as necessary. Topsoil <br />will be windrowed along the road corridors. Total disturbance is estimated to be <br />approximately 0.5 acres. <br />Surface water will be managed by ditches, culverts, and berms. One temporary stream <br />crossing will be required for access and is shown on the enclosed map. The crossing will <br />be a 24-inch diameter ADS pipe. Sediment and erosion will be managed with silt fence, <br />straw bales, or other appropriate sediment control structures. <br />Reclamation <br />All drill holes not completed as piezometers will be abandoned immediately in <br />accordance with Rule 4.07.3(1) or (2), depending on whether water was encountered <br />during drilling. The piezometers and inclinometers will be part of a long-term <br />monitoring program as MCC continues to develop designs and plans for additional <br />Exhibit 69 <br />III IIIIIIIIIIIIIIII <br />sss <br />June 1998 <br />exh69mr2J4 doc <br />