I have spent many hours on the water, before Covid I was operating vessels on the Hudson and East Rivers. I even posted many pictures from the harbor…

I do have a few theory’s pertaining to the bridge collision.

The Jones Act has lots of information here is just some…

The Merchant Marine act of 1920 was designed to create a safe network of merchant mariners within the U.S. after World War I, in reaction to the U.S. fleet being destroyed by the German navy. The Jones Act requires all goods shipped between U.S. ports to be transported by U.S. vessels (and operated primarily by Americans).

It calls for providing the nation with a merchant marine that can transport goods between U.S. ports, increase national security during war times, and support a U.S. maritime industry. This nearly century-old law has been amended several times, most recently in 2006.

While much of the current attention on the Jones Act is focused on foreign shipping regulations, the law also contains important information about the maritime industry’s responsibilities regarding safety and well-being of crew. It safeguards the rights of sailors from being exploited, requiring compensation for injuries due to negligence by their employers. It requires employers to maintain safe environments and provide medical care, and also sets standards for vessel maintenance, safety equipment such as lifeboats, and crew qualifications, training and licensing. And, this all-encompassing law has something to say about the environment too, requiring all U.S. ships to comply with EPA regulations.

The Bottom Line
The Jones Act is a 1920 law that limits how cargo is transported by sea. It requires any cargo shipped between U.S. ports to be carried by U.S. ships, with American crews. Originally intended as a measure to support the strategically-important shipping industry, it is now considered a classic example of protectionism.

I'd say a combination of dropped anchor and bridge pinning it to the bottom are what finally stopped it.