Previous photo pair1930 - 2012: Alpine Flood Plains and Terraces and Fans near East Fork Toklat River22/51Next photo pair
East Fork Toklat River Bridge photo pair
Photo Credits: Hoyt Coll. (Denali NP&P Museum) (1930), R. D. Karpilo (2012)
Ecoregion: Alaska Range Mountains
Change Type: Human development and impacts
Human development and impacts
Description:
This photo pair features two iterations of the bridge over the East Fork of the Toklat River. The first bridge, shown in the earlier photo, was built in 1930 out of wooden timbers. The second, and current bridge, was built in 1954 out of concrete. Because glacial rivers carry such a high sediment load they are prone to near constant channel migration and pose challenges for road and bridge builders. Notice the increased shrubs on the terrace above the river, and vegetation the steep bank leading down to the river. How will changes in the vegetation both at the bridge site, and farther upstream effect the sediment load and movement patterns of this river?