The red circle lower right is where the creek is dumping into the Trinity River.
The blue circle is the bottom of the Trinity River Greenbelt Park. The construction going on is part of the public access initiatives for Dallas residents to enjoy the river. Part of what you are looking at are the newly installed artificial rapids for tubers and kayakers.
We are not talking about some remote location in the azzhole of nowhere. The Trinity is the west border of the city of Dallas. It's about as densely populated as you can get.
The douche nozzles that were doing this need to go to jail.