The difference in visibility at the old Port of Tacoma dock is crazy now

Six months ago, I was working on a piling inspection there and could barely see my hand in front of my face, maybe 2 feet of viz on a good day. They finally started enforcing the no-washdown rule for the bulk carriers, and last week I went back and had a clear 15 feet. Has anyone else seen a spot turn around that fast just from one rule change?