Looking at the arial shot of the area here are my comments.
The 9th ave el is up and running. You can see trains south of 155th St. Station. The Green lines yard North of the Macombs Dam Bridge viaduct and West of the el station is intact as the transfer table is visible. The area South of the Polo Grounds showing the diagonal area with no vegetation is the construction remains of the Ind Concourse line The Nassau houseboat that was present at the Bronx shoreline at Putnam bridge is not there yet. Sedgwick Ave. station is still intact with the NYC Putnam portion and the yard along Sedgwick Ave. Also visable. No Major Deegan highway yet. NYC. Highbridge yard has been reduced in size. (That area between the yard leads was where the Composites were stripped of their original trucks and had the Maximum traction tracks install for elevated operation. The Flivvers were also delivered there and had the Composite trucks installed. The yard remained like that for many years after the conversion was completed) The 3rd Ave. Railway yard North of the Bronx side of the Macombs bridge viaduct and West of Ogden Ave. has been removed. The Yankee Stadium is up and so is the Bronx County Courthouse. There are little To no automobiles in the photo. My best guess is the photo was taken in the early Thirties.
Nate
