I found a paper written in 2013 by Clifford Zink titled, Iron and Steel, Entrepeneurs on the Delaware. In that paper he tells the history of iron and steel manufacturing in the capital city telling the story of innovators like Peter Cooper (below), Abraham S. Hewitt, and John Roebling.
Peter Cooper started The Trenton Iron Works in 1845, also known as Cooper-Hewitt Iron Works, in a building on the Delaware River at the foot of Warren Street, near where the Trenton Thunder Park now stands. Over the years they moved out around that base and into other sections of the city. Why Trenton? Well, you had the river, there was the D&R Canal, and nearby railroads going points everywhere.
World Maps Online
In the above image (if you click on it it gets larger) from a map found on World Maps Online drawn in 1900 we can see Cooper's factory, which had by then changed names or hands (I didn't research that further) in the upper left of the image. What I find that is cool is how different the scene looks today. The bridge to the far left is the Calhoun Street Bridge, and to the right the Trenton-Morrisville Bridge, aka The Trenton Makes Bridge. For those of us that crawl around down there it is interesting to see the island closest to the Morrisville, PA side. And up on top, on the Trenton side, how large the island is there, which was once part of Stacy Park. It's still there but smaller. Through the years as waterfront development changed due to de-industriualization and notable storms, like the massive 1955 flood, and what changes became of the banks of the Delaware River on both sides. On the PA side, in 1936, a levee was created to reduce flooding in the town of Morrsiville, specifically for a section
known as "The Island", because as we can see, there was an island there. If you look at the map you can see Central, and maybe Park Avenue, just above the Trenton Makes Bridge. Those streets are still there today. So, was the river and island "removed", or filled in when they did the levee construction in 1936 which changed, or ruined, "The Island" neighborhood? One last thing, looking at a Google Map view you can almost see where the river was "cut" off and re-directed when the levee was built. The filled in section is now Williamson Park, which the town is under talks to re-develop into a condo/mini-town.
Cooper would go on to produce the first I-beams in the United States and they were the go-to structural members for many of the historical large buildings in the Northeast. First, a modifed rail road track known as the "bulb T" and then a more true representative of classic i-beam design. What is even