Quote Originally Posted by Tonnichiwa View Post
8 miles before it gets to the Puget Sound it splits into two separate forks and then both of those forks form two different Delta's. The island created by this is called Fir Island and is 15.50 Square Miles (40.14 KM sqared).
...well, technically the only reason the split exists is because of extensive human intervention by the construction of dykes
(reference http://www.skagitcounty.net/Envision...n_overview.pdf )

and the entire area, including Fir Island, is all a part of the delta (from https://en.wikipedia.org/wiki/Fir_Island_(Washington) )

The Padilla Bay Center provided the attached probable map of the area of 10,000 years ago.

The Skagit River once entered Puget Sound at Padilla Bay, but sometime during the past thousands of years, its mouth shifted southward into Skagit Bay. Bayview Ridge to the southeast of Samish Island, was also once an island, like Samish Island, before delta marshes filled in this region.
skagitriverdelta.gif

-Rob (it doesn't say River Police in my avatar for nothing) A>