This photo pair shows the Toklat River bridge, spanning the Toklat River. Note the apparent thickening of the spruce forest at the base of the slope, and the addition of new spruce trees on the alluvial fan. There also seem to be a few stands of a deciduous tree, perhaps poplar, that have established over the intervening period. Overall, this photo pair does not show as much change as was captured in other nearby photo pairs. Why do you think that is? Could there be something about the physical properties of this site that make it resistant to change? Do you think the fact that this area has been used by humans throughout the time period could have an effect on change patterns?