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13 <br /> Table 1. List of aerial photographs used in tha study. <br /> Agancy Date Type* Scale <br /> Fac. Aerial Surveys 1961 BiW 1" - 400� <br /> H.G. Chickerinq, Jr. 1965 BiW 1" � 400� <br /> Wash. Dept. Natural Resources 1970 B6W 1" � 1,000� <br /> Wash. Dept. Natural Resources 1979 SiW 1M � 2,000� <br /> Wash. Dept. Transportation 1985 BiW 1^ � 2,000' <br /> Wash. Dept. Transportation 1988 CIR 1" e 2,500� <br /> * B&W = black and white photoqraph <br /> CIR - color infra-rad photoqraph <br />