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- <br />Table 4,8.1 Haul Road Culvert Sizing. <br /> Peak Flow Diameter <br />Culvert No. (cfs) (in) Quantity <br />w Footnote <br /> <br />Existing <br />A-1 24 48 1 <br />~A-1A~ N/A 24 1 1) <br />A-2 133 60 1 <br />A-3 N/A 60 1 7) <br />A-4A 72 60 1 <br />A-6 21 36 1 <br />~ A-7 - 15 36 1 <br />BC-1 37 24 3 <br />BC-2 57 60 1 <br />BCC 34 36 1 <br />BC-4 28 36 1 <br />BC-5 2 24 1 <br />BC-6 34 36 1 5) <br />BC-7 112 60 i 5) <br />D-1 26 36 1 <br />D-2 4 24 1 <br />D~ N/A 24 1 7) <br />D~ 15 24 1 <br />D-5 37 48 1 <br />D-6 41 48 1 <br />Future <br />A-4 72 48 1 <br />A-5 68 48 1 <br />Footnote indicates culverts that drain undisturbed areas or road surfaces. <br />Footnotes: 1) French drain outlet. <br />2) Premine agricultural use. <br />3) Premine highway/road system. <br />4) Agricultural/reclamation access. <br />5) Light duty access. <br />6) Impoundment drain. <br />7) Undisturbed area drainage only. <br />Note: See Map 9, Roads, for all culvert locations. <br />4-174 <br />