The multitude of sources simply cannot be ignored. There are several articles stating the environmental impact. I will actually expand the section in the article because the monument is so big, people should know as a part of an encyclopedia the river bed violations. I would disagree with the arguments given above and that the edit should have more expansion within the article as a half dozen citations stating there are environmental issues. Also there is a persistent  conflict of interest from the users above but from their follow-ups, there intentions will be clear.