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Mine Roads - The following roads will be constructed or reconstructed and maintained to support
<br />the proposed PSCM operations;
<br />• Haulroads
<br />• Road A —
<br />existing, re- designed
<br />• Road A -1
<br />— existing, re- designed
<br />• Road B —
<br />existing, re- designed
<br />o Road D —
<br />new
<br />Access Roads
<br />• Road C — existing, approved postmine road
<br />• Road E -1 —existing, approved postmine road
<br />In -Pit Roads
<br />o Pit Ramp (Road F)
<br />Designs for all mine roads comply with applicable provisions of Rules 4.03 and 4.04.
<br />Specifications for each road are summarized or referenced in the following sections. Haulroads are
<br />designed to comply with construction and reclamation design requirements, hydrologic protections,
<br />and provisions for disposal of unsuitable materials consistent with applicable provisions of Rules
<br />4.03.1, 4.05.2(4), 4.05.18, 4.06.2, 4.06.3, 4.06.4(2), 4.09.1, 4.15 and 4.17. Access roads are
<br />designed to comply with construction and reclamation design requirements, hydrologic protections,
<br />and provisions for disposal of unsuitable materials consistent with applicable provisions of Rule
<br />4.03.2, 4.05.2(4), 4.05.18, 4.06.2, 4.06.3, 4.06.4(2), 4.09.1, 4.15 and 4.17. Light -use roads are
<br />designed to comply with construction and reclamation design requirements, hydrologic protections,
<br />and provisions for disposal of unsuitable materials, consistent with applicable provisions of Rule
<br />4.03.3, 4.05.2(4), 4.05.18, 4.06.2, 4.06.3, 4.06.4(2), 4.09.1, 4.15 and 4.17.
<br />Temporary runoff and sediment control measures are implemented prior to road construction to
<br />control runoff, erosion, and sediment transport from the associated disturbed areas. Such measures
<br />may include, but are not limited to, the use of temporary berms and placement of silt fence and /or
<br />straw wattles or bales to intercept and control drainage.
<br />Road construction methods are similar for all classes of roads, with construction generally involving
<br />initial clearing of vegetation and recovery of available soil materials, cut -fill excavation and
<br />placement, installation of drainage structures, grading, and placement of surfacing materials. For
<br />access and haulroads, fill and embankment construction involves placement and compaction of fill
<br />materials in horizontal lifts approximately 12 inches deep over the width of fill or embankment. Fill
<br />material is not placed in its final position, but dumped and then bladed to facilitate moisture
<br />conditioning and proper compaction. Compaction is carried to the edge of the fills so that final
<br />embankment slopes are firm and stable. Where fills are placed against existing slopes, the slopes
<br />are benched and scarified and the loosened material blended with the fill during placement and
<br />compaction.
<br />When a roadside ditch is required, ditches are cut to the design configuration and grade following
<br />completion of road construction and lining material (if required) is placed to limit erosion and
<br />control flow velocities. Culvert installation involves excavation to competent material, placement
<br />of bedding material, culvert placement and compaction of fill and cover material around and over
<br />the culvert, and placement of appropriate headwall and outlet protection where required. On
<br />completion of road construction, associated cut - slopes and embankment out - slopes are seeded with
<br />TR -0,1 2.05 -22 Revision 4/12
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