US Route 10 in Washington

[Amaury]

I know US Route 10 still exists, but I'm talking about the demoted to state route section here in Washington. I've been trying to find maps of the former route, but I can't. I do also recall from posts here that it had a few different alignments, which I'm also interested in, similar to how US Route 12 has been realigned a few different times between US Route 730 and Walla Walla, including the most recent one that made it a freeway.

I know Vantage Highway and Washington State Route 904 are sections of it, and I also know that it mostly parallels Interstate 90 or uses the same road as current Interstate 90, but I'm still interested in seeing what its routing was like when it was strictly US Route 10. Of course, I'm interested in it as a whole as well, as I see it ran through Idaho and Montana, for example, but I'm particularly interested in its routing here in Washington.

[Max Rockatansky]

You should be able to plot out most of it using commercial maps and stuff from the USGS. 

[Mapmikey]

To get a county map from the 1930s and one from the 1940s, go here - https://catalog.archives.gov/search?page=1&q=stevens%20county%20washington%201940&typeOfMaterials=Maps%20and%20Charts

Then change the search bar to the county you want and either 1940 and 1950 and on the left hand side select maps and charts...

Links to repositories for Washington state maps are found here - https://www.usends.com/sources.html

[pderocco]

While it doesn't have street-level detail, this map collection should be useful:
https://cdm16977.contentdm.oclc.org/digital/collection/p16977coll25/search

[pderocco]

To get a county map from the 1930s and one from the 1940s, go here - https://catalog.archives.gov/search?page=1&q=stevens%20county%20washington%201940&typeOfMaterials=Maps%20and%20Charts

Boy, they should give all their maps to David Rumsey to scan. This is pretty crappy site.

[Bruce]

The original corridor in 1926 from Seattle to Coeur d'Alene roughly followed these modern highways: SR 900 from Seattle to Issaquah via Renton; I-90 from Issaquah to Cle Elum; SR 970 from Cle Elum to Virden; US 97 from Virden to Peshastin; US 2 from Peshastin to Spokane; and I-90 again from Spokane to Idaho.

One of the longer stretches of long-bypassed US 10/Sunset Highway in this section is between Davenport and Deep Creek: https://maps.app.goo.gl/Jp2uokgMcuMtuZQS6

US 10 was moved to a more southern route via the Vantage Bridge in 1939 and rerouted in the Seattle area to use the Lake Washington Floating Bridge in 1940. The old route was signed as US 10 Alt. until US 2 was extended all the way across Stevens Pass to Everett in 1946. Various cutoffs and realignments of US 10 were built before I-90 was signed across the state in stages from 1957 to 1993.

Historic-Aerials has pretty decent coverage along parts of the corridor, so it wouldn't be too hard to trace it out.

[Amaury]

I'm not sure where Virden is, exactly, as I don't see it on Google Maps, but as for the original route, I'm guessing something like this: https://maps.app.goo.gl/yfdyyx6aadP8RQ9n8

And perhaps something like this for the Vantage Bridge one? https://maps.app.goo.gl/aZ5CdP94XorKLrWM6