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• Air Prrmu Appfia~an Por Larmcito fan! <br />and small graveled pazking and supply storage pads. Water use per mine will be approximately <br />20,000 gallons per day. Transformers will be skid mounted and will reduce power from 69 kV <br />to 12,470 volts and will be distributed to the surface and underground at 4,160 or 7,200 volts. <br />Power will be supplied by San Isabel Power from the transmission line which parallels the <br />Purgatoire River. <br />Roads <br />Haul roads will be located to transport coal via tractor dump-trailer, and to provide access for <br />personnel and equipment from underground and surface mine locations to the rail coal loadout <br />facility. Haul road and access road preliminary designs, construction drawings, and as-built <br />drawings aze certified by a qualified registered professional engineer. Roads, including light use <br />- roads, aze shown on Figure 2. The gravel surface will be watered to provide for dust suppression <br />(control) from haul road traffic. <br />Haul Roads <br />Haul roads will be constructed form the loadout facility to the R-1, R-2, P-1, P-2 and P-3 <br />underground portals, and surface mining operations. The haul road to the P-1 and P-2 <br />underground portals is planned for construction late in the first permit term. The haul roads from <br />• the coal loadout facility to the surface mine locations and to the R-1 and R-2 underground mine <br />portals located also provide access for personnel and equipment. All haul roads are shown on <br />Figure 2. Road alignments follow existing roads, ridge lines, and stable slopes. In addition, they <br />follow the topography so as to m;n;mi~e cuts and fills, avoid flood plains, and cross drainages at <br />right angles. Except for crossings, no segment of haul road is Located in the channel of an <br />ephemeral, intermittent, or perennial stream. <br />Haul road geometric criteria will be appropriate for the anticipated traffic and meet safety and <br />stability requirements. The design maximum speed is 25 miles per hour, reduced as required to <br />provide a sight distance of three times the braking distance (a distance dependent upon grade, <br />loads, and speed). The minimum radius curve will be 100 feet and grades will be limited to 10% <br />(with, perhaps, pitches up to 15% for distances not exceeding 300 feet). <br />A 50-foot-wide travel way is proposed for permanent haul road segments. The width of temporary <br />haul roads may be reduced to 30-foot-wide with turnouts in reaches of steep side-slopes to reduce <br />surface disturbance and extensive cut or fill slopes. The travel way will be crowned (5%) and <br />ditched with culverts to prevent ponding. <br />Embankment materials will be free of organic matter, peat, or other unsuitable (acid-producing) <br />materials. In the event an embankment is required on side-slopes greater than 20%, the <br />embankment will be plowed, stepped, or keyed. Embankment slopes will not be steeper than <br />2H:1 V unless the material consists of a minimum of 85% rock, in which case the slopes may be <br />. placed up to 1.35H:1V. Embartlartent materials containing less than 25% of rock larger than 6 <br />inches will be placed in uniform layers not exceeding 12 inches before compaction, and compacted <br />within acceptable levels of moisture content. Material consisting of lazge-size rock will be placed <br /> <br />