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n <br />0 <br />Figure 4.8-1e, Minimum Number of Check <br />Dams Using CN = 78 <br />180 <br />160 <br />140 <br />W <br />E <br />R <br />O <br />Y <br />V <br />d <br />t <br />v <br />100 <br />w <br />0 <br />A <br />t+ d <br />00 <br />w E <br />80 <br />s � <br />z <br />E <br />E <br />'c <br />60 <br />40 <br />20 <br />E <br />50 100 150 200 250 300 350 <br />Drainage Area, Acres <br />