Sunday, April 4, 2021
April 3, 2021 - Rialto Beach
Tuesday, March 23, 2021
Monday, March 22, 2021
March 21, 2021 - Super(fund) View
The urban Duwamish Waterway, south of downtown Seattle, is considered to be the most polluted river in the US. The Duwamish River used to be a wide, meandering river with large areas of mudflats and marshes. By the 1940s it had been channeled into the 7 mile industrial waterway we see today. Today it is a Superfund site.
Looking north, one gets a sense of the working nature of this West Coast port. From the pilings and moored barges, to the dockside gantry cranes located on the man made Harbor Island beyond the closed West Seattle Freeway is the downtown Seattle skyline.
The dredging of the Duwamish River began in 1913. The waterway was straightened and dredged as deep as 50' to allow ocean going vessels up the channel. The 20 million cubic feet of mud and sand from the Duwamish helped form Harbor Island. (Harbor Island was initially formed from some of the 58 regrades of the areas around downtown Seattle in which the tops of hills were removed. It was the largest man made island in the world from 1909 to 1938. In 1967 it regained that title following an expansion.) By the 1930s the Duwamish Waterway and surrounding area was Seattle's industrial and commercial core.
Industrial plants, including Boeing, and commercial facilities still line the waterway. Polluted by decades of industrial waste and sewage it is slowly being cleaned up. The paths to the river have numerous signs that warn against eating any of the resident fish, crab and shellfish (Dungeness Crab, mussels, clams, flounder and sole). It's hard to imagine that any warnings are necessary given the surroundings.
While the salmon that transit the Duwamish aren't considered a resident fish, the explicit warnings and the diagrams demonstrating cleaning and cooking techniques to minimize exposure to the PCBs found in salmon might give one pause to fish here.