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Rule 2: Permits Road alignments follow existing roads, ridge lines, and stable slopes. In addition, they follow the topography so as to minimize cuts and fills, avoid flood plains, and cross drainages at right angles. Except for crossings, no segment of haul road is located in the channel of an ephemeral, intermittent, or perennial stream. Intermittent or perennial natural drainages are not altered or relocated. No unique, endangered, or special environmental or cultural resources are known to be impacted by the haul road system. Haul road geometric criteria will be appropriate for the anticipated traffic and meet safety and stability requirements. The design maximum speed is 25 miles per hour, reduced as required to provide a sight distance of three times the braking distance (a distance dependent upon grade, loads, and speed). The minimum radius curve will be 100 feet and grades will be limited to 10% (with, perhaps, pitches up to 15% for distances not exceeding 300 feet within any consecutive 1000 feet). A 30 to 50-foot-wide travel way is proposed for most haul road segments. Haul road width may reduced to 30-feet with turnouts in reaches of steep side-slopes to reduce surface disturbance~and extensive cut or fill slopes. The Vavel way will be crowned (5%) and ditched wi -culverts to prevent ponding. Typical cross sections aze shown in Figures 2.05.3-8 through 2.OS.~l~or vazious side slopes. As shown on Map 2.05.3-36, the Jeff Canyon Haul Road will need few eulverts because it follows the ridge line. Only two 18-inch culverts are required to supplement the existing culverts. These new culverts collect runoff from approximately 14.4 and 9.4 acres, respectively. Table 2.05.3- lasummarizes the results from numerous site-specific SEDCAD culvert designs and allows LCC [o quickly determine culvert sizes based on drainage area. According to this table, both the existing and new culverts will have 10-year, 24-hour storm runoff of less than 6 cfs, which can be passed by an 18-inch culvert. Vegetation will be cleared for no more than the width needed for the roadway, drainage control, and any cut and fill. Topsoil will be removed from road cut and embankment footprints and stored for use in reclamation and as a vegetation growth medium for cut and fill slopes. Cut slopes will not be steeper than 1.Sh:1 v in unconsolidated materials or 0.25h:1v in rock. In areas of steep side slopes, the road alignment will be shifred so that the entire road width rests on the cut benches. All vegetation material and the upper two feet of topsoil will be removed from embankment foundation areas during the initial phases of construction. No vegetation material or topsoil will be placed beneath any haul road embankments. Embankment materials will be free of organic matter, peat, or other unsuitable (acid-producing) materials. Excess or unsuitable materials will be disposed of in accordance with Rule 4.09.1 of the Board's regulations. In the event an embankment is required on side-slopes greater than 20%, the embankment will be plowed, stepped, or keyed. Embankment slopes will not be steeper than 2h:1 v unless the material consists of a minimum of 85% rock, in which case the slopes may be placed up to 1.35h: l v. Embankment materials containing less than 25% of rock larger than 6 inches will be placed in uniform layers not exceeding 12 inches before compaction, and compacted to at least 95 percent of standazd proctor maximum dry density (ASTM D 698). Moisture conditioning of the fill material to 3 percent below optimum to 3 percent • above optimum moisture content will be obtained prior to compaction. he design density will vary according to soil type and can not be determined ahead of time. For the sandy clay soils anticipated at the site, we expect standard proctor maximum dry density values will be in the range of 110 to 115 pounds per cubic foot with optimum moisturel ~ ~~~ 9/~ IarercimPmt PMT(6]5)Apr30°I.wpE 'L.OS_1 / (revised 9/]0/01) ~IQ.