Apparently there are people besides me wandering my neighborhood and seeing the vanished past. This image comes from the 40th Street Cut blog, the record of an effort to put together an art show inspired by the Piedmont Avenue neighborhood. I have to say these guys know what grabs me.
The Key Route used to cut through the ridge running east of Broadway between Macarthur and CCA (which I’ve called Montgomery ridge, but on an old map it’s called Thermal Hill). This photo shows that cut before the tracks were pulled up and the cut filled in again. If I only had an hour to examine its walls!
The walls of the cut are steep, but there was no bedrock in it—that’s why the cut was made, because the work was easy. The material of the hill is stiff, well-compacted alluvium from a large, ancient fan that has had gulches cut into it by modern streams. Here the ridge was flanked by the two branches of Glen Echo Creek, one running along Broadway from the Claremont golf course and the other coming down from the cemetery grounds. (They join along Richmond Boulevard just north of 30th Street.) There was no danger of landsliding or rockfalls.
Geologists love roadcuts. In this part of Oakland they’re quite rare.
Oh—the 40th Street Cut people are having an opening reception Thursday the 18th, downtown. Details on the blog.