Previous photo pair1930 - 2010: Alpine Flood Plains and Terraces and Fans near East Fork Toklat River38/60Next photo pair
East Fork Toklat bridge photo pair
Photo Credits: Alaska Road Commission 61-2-268 (Alaska State Library) (1930), Tamás Szerényi (2010)
Ecoregion: Alaska Range Mountains
Change Type: Human development and impacts
Human development and impacts
Description:
This photo pair features the 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. The second, and current bridge, was built in 1954. Glacial rivers, because they carry such a high sediment load are prone to near constant channel migration and pose challenges for road and bridge builders. Notice the increased shrubs in the foreground and the vegetation that has colonized the gravel bar seen just behind the bridges driving surface. Why do you think there is so much more vegetation on that gravel bar?