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Location. At the NHN Mine area, haul roads will be constructed on lands proposed to be <br />disturbed by mining and reclamation operations. <br />Haul roads at the mine site will be designed with appropriate ditches, grades and culverts to <br />control erosion and runoff. All haul roads will be constructed basically "on- grade ". Topsoil will <br />be removed and stockpiled in accordance with WFC's topsoil salvage plan. The location will be <br />partially limited by the grades of the existing or postmining areas. The proposed haul road <br />profiles and typical cross section are shown on Maps 2.05.3(3) -3. <br />Design and Construction. The design of the haul roads incorporate the demand for mobility and <br />travel efficiency, based on the geometric criteria appropriate for the anticipated volume of traffic, <br />weight and speed of the vehicles to be utilized. The design and construction or reconstruction of <br />haul roads not within the estimated disturbed area will be certified by a registered professional <br />engineer, if required by the DRMS for good cause shown. <br />Should haul roads not within the estimated mining disturbance areas be necessary, they will be <br />designed and constructed or reconstructed in compliance with the following standards in order to <br />control erosion and disturbance of the hydrologic balance. <br />The vertical alignment of the haul roads will not exceed 10 percent on the overall grade. <br />Maximum pitch grade will not exceed 15 percent, and there will not be more than 300 feet of <br />pitch grade exceeding 10 percent within any consecutive 1,000 feet. <br />The horizontal alignment will be consistent with the existing and postmining topography and <br />will be coordinated with the vertical alignment to ensure that the roads will not cause excessive <br />environmental damage. Road cut slopes will not be steeper than 1v:1.5h in unconsolidated <br />material or 1v:0.25h in rock. Embankment fill slopes will not be steeper than 1v:1.5h, except <br />where embankment material is a minimum 85 percent rock. Embankment slopes will not be <br />steeper than lv:1.35h unless it has been demonstrated to the regulatory authority that <br />embankment stability will result. The minimum safety factor for all embankments will be 1.25. <br />Section 2.05.3(3) Page 5 November 2011 <br />