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the relative youth of the drainage systems. The streams appear to be <br />lowering their gradients by headcutting. This is occurring in both <br />alluvial and non-alluvial material. The cuts probably move headward in <br />the spring during snowmelt runoff. The scars left by the advancement are <br />naturally revegetated as the year progresses. Therefore, the erosion is <br />not excessive enough to be causing management problems. <br /> <br /> <br />2-454 <br />REVISED FFg 13 '87 <br />