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Air Prrmy App'k~ion for lonncrto Can( Ca~mry <br />in uniform layers not exceeding the average size of particles, lifts not in excess of 36 inches, affi <br />placed in a manner to m;nimizr voids, pockets, and bridging. The sub-base will be strengthened <br />when conditions warrant with geotextiles. The final layer will meet the requirement:; described <br />above. The crushed gavel will be durable to withstand the anticipated volume of traffic. <br />Access Roads <br />Access roads aze frequently traveled roads which aze not used for the transportation of coal. <br />Access road preliminary designs and construction drawings are certified by a qualifiedi registered <br />professional engineer. <br />The main access road will be constructed from Highway 12 to the coal loadout ir- Loreacito <br />Canyon. An existing road provides access for ranching and timbering up Lorencito Canyon. This <br />road will be relocated and upgraded as an access road within the permit area to the ]?-1 and P-2 <br />underground portals. This will provide access for personnel and equipment. The acce:;s roads are <br />designed to American Association of State Highway Transportation Officials Policy or.{ Geometric <br />Design for Local Rural Roads. Access roads are shown on Figure 2. <br />Alignments follow existing roads, ridge lines, and stable slopes when possible; and follow the <br />topography so as to minimize cuts and fills and avoid flood plains. Any crossings of drainages will <br />be done at right angles. Except for crossings, no segments of access road are lot:ated in the <br />channel of an ephemeral, intermittent, or perennial stream. • <br />Access road design will accommodate the needs of specific uses of the road. The design maximum <br />speed is 25 [Hiles per hour. Grades will be limited to 15% for limited distances prescribed by the <br />regulations. A 20-foot-wide travel way is proposed for the main access road. The u~avel way is <br />crowned (5 %), ditched adjacent to cuts, and has culverts or swales when necessar}~ to prevent <br />ponding. <br />Embank®ent materials will be free of organic matter, peat, or other unsuitable (acid-producing) <br />materials. In the event an embanlanent is required on side-slopes greater [hart 33%, the <br />embankment will be plowed, stepped, or keyed. Embarilanent slopes will not be steeper than <br />1.SH:1V unless the material consists of a minimum of 85% rock, in which case the slopes may <br />be placed up to 1.35H:1V. Embankment materials containing less than 25% of rock lazger than <br />6 inches will be placed in uniform layers not exceeding 12 inches before compaction, and <br />compacted within acceptable levels of moisttue content. Material consisting of lazge-size rock will <br />be placed in uniform layers not exceeding the average size of particles, lifts not in t:xcess of 36 <br />inches, and placed in a manner to minimize voids, pockets, and bridging. The final layer will <br />contain material which has less than 25% of rock lazger than 6 inches in lazgest dimension in a <br />-. uniform layer not exceeding 12 inches. The crushed gravel will be durable to withstand the <br />anticipated volume of traffic. <br />• <br />.~. +nv,~~ary io. iw~ 11 <br />