Found: [www.historicaerials.com]

Looked at their stuff in the Richardson Bay area. Fuzzy, but usable, and goes back to the mid-1940s. No other draw spans on the NWP in the area. Didn't look at what their sources are; might be some publicly available stuff too.

One thing did catch my eye. in the 1956 view, there's a bunch of fill patches across the marsh that are aligned and wide enough for a '50s-style freeway. Nothing ever appeared there, and later on some of it became occupied with motels and other buildings. Was Hwy 1 supposed to peel off 101 as a freeway there and fly across the marsh in a lazy S-turn rather than wiggling along the base of the hills as it did then and still does? Was there a S. Marin Freeway Revolt in the late 1950s (most traces of it are subdued or in the process of conversion to other things by the mid-'60s view)?