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early models were most sf;nsitive to clear cutting and a minimal or zero <br />increase in water yield wa;s as;sumed to occur under partial cutting unless <br />more than 50 percent of the olrer story vegetation was removed, (Troendle <br />and Leaf 1980). The Dead.horse Creek Watershed experiments were <br />implemented to test both the hypothesis and the initial hydrologic models. <br />Deadhorse Creek, gauged si.nce 1955, is a 667 acre watershed (figure 4) on <br />the Fraser Experimental Fot•est. Two separately gauged sub drainages within <br />Deadhorse Creek are the 100 ac;re North Fork and the 193 acre Upper <br />(south) Basins. Weirs on the rdorth Fork and Upper Basin were built in <br />1970 and 1975, respectively. T'he Deadhorse Main watershed and two sub <br />drainages are calibrated against the 1984 acre control watershed, East St. <br />Louis Creek. Unit 8, on Dea.dhorse Creek (figure 4) is an un-gauged North <br />Slope, 100 acres in area, which lies downstream of both the North Fork and <br />the Upper Basin sub draina€;es. Unit 8, or the North Slope, represents a <br />portion of the 368 acre interbasin area lying below the two gauged sub <br />drainages and above the ma:in streamgage. <br />DEA,DHIORSE WATERSHED <br />Shelterwood cut Em <br />Proposed selection cut 0 <br />Clearcuts i4 ?s- <br />Unit boundary <br />Stream-gages <br />Roads <br />Units OOn9913 <br />Upper Basio(3,4,6) <br />1/2 mile <br />North Fork ? <br />North Slops <br />N <br />Figure 4: Schematic drawing of the Deadhorse Creek watershed showing harvesting <br />practices and streamgage locations. <br /> <br />7