- Marginal Place SW – January 27, 2022
- W Pleasant Place – January 27, 2022
- Birch Avenue N – January 25, 2022
This street, which runs ³⁄₁₀ of a mile from Fuhrman Avenue E to E Allison Street, was established as an alley in 1890 as part of the Denny–Fuhrman Addition to the City of Seattle, but only received a name in 1936. It was named for Portage Bay, the eastern arm of Lake Union, which it parallels. Portage Bay was in turn named for the portage from Union Bay (part of Lake Washington) to Lake Union over the Montlake Isthmus, which is today the Montlake Cut of the Lake Washington Ship Canal.
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