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Section - 2.50.3 <br />extends to the former coal stockpile area near the silo, which has now been converted to an employee <br />• parking area. This section of road is designed and constructed to handle two-way track traffic, in <br />addition to all other traffic entering or leaving the site. 'T'his section of the road is 24 to 40 feet wide, <br />partially paved with [he remainder gravel-surfaced, with a maximum grade of nine percent. The <br />average grade of this road segment is about 5 percent. <br />The second segment of the mine entrance road extends from the parking azea to the truck dump and <br />also intersects the East Yard and Sanborn Creek Mine-haul roads and the short road segment to the <br />Elk Creek coal stockpile area. This road segment predominandy handles one-way loaded truck traffic <br />and other miscellaneous site traffic. It may, however, also periodically handle two-way loaded truck <br />traffic from coal stockpile areas. This section of haul road is about 24 feet wide, gravel-surfaced, with <br />a maximum grade of 8 percent. <br />The third segment of the mine entrance road extends from the west end of the dump station, circles <br />back to the east, crosses the employee pazking area, then ties back into the fast road segment. This <br />section of road handles one-way truck traffic and other miscellaneous site traffic. Most of the trucks <br />that use this road segment have passed through the truck dump, dumped their load, and aze returning <br />empty. If coal is being added to the coal stockpile, the trucks bypass the dump station and continue <br />directly to the coal stockpile. This road segment is about 24 feet wide, gravel-surfaced, with a <br />maximum grade of 15 percent over a distance of 150 feet. <br />An additional haul road segment was constructed to the Elk Creek coal stockpile area for coal haulage <br />to and from the pile. This new segment begins at the point where the East Yazd haul road uosses <br />over the Sanborn Creek Mine overland conveyor and extends about 350 feet to the north to the Elk <br />Creek coal stockpile area. This road section has an average grade of about 9.5 percent and a pitch <br />grade of 15 percent for about 250 feet. Cut slopes aze not steeper than I,SH:1V in unconsolidated <br />• materials or 0.25H:1V in rock. Fill slopes are not steeper than 2H:1V. The road is a minimum of 18- <br />feet wide and surfaced with four to six inches of gravel. During the first phase of the Elk Creek coal <br />stockpile construction, the existing road (Segment 3) was used as the haul road, requiring no <br />modification other than increasing the height of the safety berm and removing the existing catde- <br />guard. Truck traffic will only use this road segment on those rare occasions when coal is being added <br />to the Elk Creek coal stockpile by truck or coal is being reclaimed to be hauled offsite by truck. <br />Drainage control for the first segment of the mine entrance haul road is provided by roadside ditches, <br />cross-culverts, and alternative sediment control structures. Drainage control for the remaining three <br />segments is provided by the drainage and sediment control system for the Elk Creek coal handling, <br />support, and ancllary Facilities area. An uphill ditch on the first road segment drains through an <br />alternative sediment control structure prior to release to the existing ditch that pazallels the railroad <br />right-of-way. Drainage design details are provided in Exhibit 2.05-E3, Drainage and Sediment <br />Control Plan. <br />Sanborn Creek Mine Haul and Associated Access Roads -Classification of the haul road which <br />tuns from the Elk Creek coal handling, support, and ancillary facilities azea to the Sanborn Creek <br />Mine portals is based on temporary use of the road for coal haulage during construction of the <br />Sanborn Creek Ivline overland conveyor and the potential for use for haulage of coal, coal refuse, or <br />mine development waste during an emergent}' or if the conveyor is down. For purposes of <br />characterization and discussion, this road can be segregated into three segments. For all road <br />segments, road width and grade are appropriate for the volume of traffic and weight and speed of <br />vehicles that use the road. The road corridor, which is 30 to 40 feet wide, contains both the haul road <br />and the Sanborn Creek Mine overland conveyor. The road is approximately 4,000 feet long, gravel- <br />surfaced, with a minimum travel width of ]2 feet, a t}'pical road width of 20 to 30 feet, and a <br />. maximum pitch grade of 5 percent. In two areas, road width is increased to about 40 feet to provide a <br />passing zone for. trucks traveling in opposite directions. Maximum speed Gmit for this road is 15 <br />miles per hour. Cut slopes are no steeper than ].5H:7 V and embankment slopes aze not steeper than <br />2H:] V. The entire road is within the mine disturbance area as defined by Rule 4.05.2(4) and many of <br />TR-43 2.05-25 Revised August 2003 <br />