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6 <br />• will have to relocated in some areas to accommodate this. Thus the corridor of distur- <br />bance for this haul road may be wider than the other haul roads. Like the rail spur, this <br />haul road will be located nearly entirely on valley floor sediments along the creek that <br />drains Lorencito Canyon. Surface visibility is lacking over significant portions of this <br />azea, and areas where subsurface exposure is present (cutbanks, road cuts, other eroded <br />areas) commonly have cultural materials exposed. For these reasons, this haul road is the <br />main development area where alternative means of site discovery aze under consideration <br />(see Part III). Year 1000. <br />Refuse Area: About 107 acres was inventoried for a proposed refuse area in a side canyon east <br />of Lorencito Canyon and the proposed prepazation plant. This facility is no longer <br />proposed. Not part ojcurrent development plan. <br />R3 and R4 Portals: Two portals providing access to portions of the underground mine aze <br />proposed in Chimney Canyon, a tributary of Lorencito Canyon. These aze located across <br />the canyon from one another and were covered by two overlapping 40-acre blocks, for <br />a total surveyed acreage of 70. At present there has been no inventory of an access road <br />or haul road comdor between these portals and the P1/P2 box cut location, nor has the <br />location of a fill stockpile been identified. No schedule known. <br />Access and Haul Road to R3/R4 Portals: An access road and haul road will have to be <br />constructed to the R3 and R4 portal locations (a distance of about two miles from the <br />• PI/P2 box cut location). The upper portion of Chimney Canyon is currently accessible <br />only by rough four-wheel drive road. The haul road will have to extend to the P1/P2 box <br />cut where it will connect with that haul road for access to the load out. At present, none <br />of this corridor has been inventoried, and that portion of the haul road that will be <br />constructed in Lorencito Canyon will also be the focus of alternative site discovery <br />methods because of deposition and lack of visibility (see Part III). No schedule known. <br />P3 Portal: The P3 portal will be located in lower Cow Canyon. A 40-acre block has been <br />surveyed at this location which includes the portal itself and associated facilities, as well <br />as a fill stockpile azea to the north. Summer of 1997. <br />Haul Road to the P3 Portal: A haul road is proposed to connect the P3 portal with the load <br />out facility and will be used for truck transport of coal. The majority of this haul road <br />falls wholly or partially within the surface mine inventory azea, and short portions at <br />either end aze within the 40-acre parcels surveyed for the load out and the P3 portal. <br />Outside of these areas, about 133 acres was inventoried for the P3 haul road. As <br />currently understood, this haul road, and others in the mine plan, will consist of a 50-foot- <br />wide road bed, plus borrow ditches, drainage features, and cuts and fills, creating a <br />disturbance corridor that may be considerably wider in some locations. This and other <br />haul roads were inventoried as 400-foot-wide corridors in order to accommodate the <br />potential for a wide disturbance corridor, allow for minor design changes, and compensate <br />for minor map-reading errors since these roads were not staked on the ground at the time <br />• of inventory. Summer of 1997 <br />