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<br />Section 816.152 (c). <br />(c) Road cuts. <br />(1) Cut slopes shall not be steeper then specifically aut~,erized by the <br />regulatory authority which shall not authorize slopes steeper than <br />1v:1.5h in unconsolidated materials or 1v:0.25h in rock, except that <br />steeper slopes may be specifically authorized by the regulatory authority <br />if geotechnical analysis demonstrates that a minimum safety factor of <br />1.5 can be maintained. <br />('2) Topsoil or other materials suitable under 30 CFP. 816.22 shall be <br />placed on all cut slopes of 1v:1.5h or flatter to aid in establishing <br />vegetation and to minimize erosion. Topsoil depth shall be adequate to <br />support vegetation necessary to control erosion. <br />(3) Temporary erosion-control measures shall be implemented during <br />construction to minimize sedimentation and erosion until permanent <br />• control measures can be established. <br />Cut slopes will not exceed the above specified standards (See <br />Figure 38, Existing Class I Road - Cut Section, and Figure 41, <br />Proposed Class I Road - Cut Section). Temporary sedimentation <br />ponds, check dams, diversion ditches, etc., will be constructed as <br />required during road construction so that water quality standards <br />are maintained throughout the construction period. All cut slopes <br />will be seeded and mulched to aid in establishing vegetation and to <br />minimize erosion. <br />(d) Road embankments. ~moankment sections shall be constructed In <br />accordance with the following provisions: <br />(1) P.11 vegetative material and topsoil shall be removed from the em- <br />bankment foundation during construction to increase stability, and no <br />vegetative material or topsoil shall be placed beneath or in any Class I <br />• Rcad embankment. <br />816-180 <br />