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• GOAT TRAIL DRAINAGE CONTROL PLAN <br />The Goat Trail at the Edna Mine is a pre-SMCRA road that is essential to <br />the operation for access to the conveyor system (also pre-SMCRA) which is used <br />to transport coal from the hopper to the tipple facility. Due to the Goat <br />Trail's initial configuration and the steepness (30 - 70 degrees from <br />horizontal) of the hillside upon which it was constructed, alternative design <br />criteria and specifications have been implemented in accordance with Rule <br />4.03 .2(1)(e) to meet current performance standards regarding access road <br />construction and drainage control. <br />The alternative design criteria pertain to three current performance <br />standards due to pre-existing constraints resulting from the initial placement <br />of the road. The performance standards include: Rule 4.03.2(4)(c), Rule <br />4.03.2(4)(d) and Rule 4.03.2(5)(a). Although Rules 4.03.2(6)(c) and (d) apply <br />to three segments of the Goat Trail (Segments 1, 2 and 9), drainage ditches <br />are not able to be constructed at the toe of all cut slopes formed by the <br />construction of the access road due to outcropping sandstones and shales. It <br />is believed that any attempt to construct the ditches by blasting would create <br />instabilities to the cutslope itself. Further, due to the outcropping <br />formations and steepness of the hillslope water cannot be intercepted before <br />reaching all switchbacks and discharged below the switchback through conduits <br />or riprapped channels. The physical constraints of the roadway, its initial <br />placement and concerns regarding equipment and operator safety require <br />drainage to be carried around the switchbacks along the outslope side of the <br />roadway. Finally, the road surface is maintained as best as practicable to <br />prevent ponding of water and erosion of the road surface. However, to prevent <br />ponding of water in all areas, particularly where the road surface consists of <br />an outcropping formation, fill material would have to be imported up gradient <br />of the outcrop resulting in additional erosion of the rebuilt road surface and <br />additional contributions of sediment to the drainage system. <br /> Rule 4.03.2(5)(a) pertains to surfacing material to be used on access <br /> roads. The base material along several long sections of the Goat Trail and <br /> sporadically along all the other sections of the road consists of out-cropping <br /> shales and sandstones. As a result the use of normal dur able surfacing <br /> materials will in effect act as a 'ball-bearing surface' significantly <br /> reducing the traction of vehicles travelling along the road and seriously <br />. <br /> 3.SF-1 May 14, 1993 <br />