Beginning of Harbor Island.
<ul><li>Subjects (LCTGM): Rivers--Washington (State)</li>
<li>Subjects (LCSH): Duwamish River (Wash.); Fills (Earthwork)--Washington (State)--Seattle; Harbor Island (Wash.)</li></ul><hr> 
"West Duwamish Waterway" in the title here is a bit confusing. At the time, this would have simply been considered part of Elliott Bay. Once Harbor Island was constructed, the remaining water this side of Harbor Island was the East Duwamish Waterway, and on the far side the West Duwamish Waterway.
<bdi><a href="https://en.wikipedia.org/wiki/en:Asahel_Curtis" class="extiw" title="w:en:Asahel Curtis"><span title="American photographer">Asahel Curtis</span></a>
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<a rel="nofollow" class="external text" href="http://content.lib.washington.edu/curtisweb/index.html">Asahel Curtis Photo Company Photographs</a>