A sea of derricks

I ran across this old 1918 photo and thought it tied nicely into my recent hoist and derrick company model.  This scene was at the Hog Island shipyard once near Philadelphia - now long gone.  That is a lot of derricks.  This industry would have kept my hoist and derrick company quite busy, but by 1939 - the era of my model railroad - Hog Island was no more.

Apparently it was a "booming" shipyard (a bad pun).

My diner model is close to complete and will be posted in the next day or two.