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<br />Required Gravel Section <br />NORTHERN 2.000 FEET OF ROADWAY <br />Minimum Structural Number(MSN) required = 2.26 <br />Gravel Section Requred, using 6 inches of new base course and 9 inches of existing gravels = > <br />(2.26 - 6(0.14) - 9(0.03))/0.10 = 11.5 = > <br />Use 12 inches of pit run subbase gravels and 6 inches of road base gravels. <br />SOUTHERN 1.700 FEET OF ROADWAY <br />Minimum Structural Number(MSN) required = 1.36 <br />• Gravel Section Required, using 4 inches of new base course and 9 inches of existing gravels = > <br />(1.36 - 4(0.14) - 9(0.03))/0.10 = 5.3 = > <br />Use 6 inches of pit run subbase gravels and 4 inches of road base gravels. <br />• <br />~~ 2 ~ <br />