This is a color topo map by USGS. The original USGS data was compiled using 1954 aerial photos, and photorevisions (in magenta) were added using 1985 aerial photos.
Although the map data is nearly thirty years old, the topography is still very accurate, as is most of the road system. The 1985 map also reflects substantial development of sawmills during the three decades, from 1954 to 1985. Note the grouping of magenta rectangles south of town, at the Avison mill site; these are all mill buildings and structures, added during the mill’s peak (and pentachlorophenol) years.