Cleanup crews are working to gather and dispose of the oil, and the U.S. Coast Guard has closed a 15-mile stretch of the Ohio River.
The protest was about the risks posed to workers and people in general: Tthe Lac-Megantic oil train tragedy that killed 47 people was still fresh in the minds of many.
Oil and gas canals and pipelines have destroyed much of the Louisiana coastal lands.
The park, which is home to a great variety of wildlife, 100 miles of hiking and horse trails, and skies where visitors can sometimes witness the Northern Lightsmay soon be marred by oil rigs.
The native nations of the Dakotas have already seen the deadly effects of the "pipelines of death" on the native communities of western Canada.
Oil trains throughout the U.S. are literally crashing and burning. One could easily produce a long list of such disasters from last year alone. Another incident can now be added to that list.
The $5.4 billion project, which represents the dirtiest, least efficient kind of oil development, would pump dirty tarsands oil from Alberta, Canada to Texas refineries.
Part of the lead up to this week's demonstrations in Washington's against the XL Pipeline was an April 15 Google Hangout sponsored by the People's World.
Today is the fourth anniversary of the Deepwater Horizon explosion, which killed 11 workers and dumped more than 4.9 million barrels of oil into the Gulf of Mexico over a three month period in 2010.