Rocky Flats

Ryan Moehring / USFWS

Story updated Oct. 11, 2019.

Rocky Flats used to be a nuclear weapons plant in Northern Colorado. Now, parts of the site that used to be a security perimeter around the plant have been turned into a wildlife refuge (the former plant itself remains closed to the public). The site went through years of cleanup, but a number of groups are suing the U.S. Fish and Wildlife Service about safety concerns, and ongoing soil sampling has shown varying levels of radiation, continuing the debate over whether it's safe to visit the refuge.

U.S. Department of Energy

New soil samples from Rocky Flats National Wildlife Refuge show safe levels of plutonium at the former nuclear weapons manufacturing site. That's after elevated readings were found this summer. 

Broomfield city officials are suspending their search for investors to help build a toll road after a soil test found elevated levels of plutonium in the highway's planned path.

The road would cross a buffer zone on the east side of a former nuclear weapons plant northwest of Denver. KUSA-TV reported Sunday the Broomfield City Council announced it was halting efforts to find a private partner for the project.

The U.S. Department of Justice has lost track of more than 60 boxes of documents from a 27-year-old criminal investigation into safety and environmental violations at a former nuclear weapons plant in Colorado, officials said Tuesday.

Stacy Nick / KUNC

It just makes sense to meet with CU Denver history professor Tom Noel -- also known as “Dr. Colorado” -- at History Colorado Center’s exhibit "Zoom In: The Centennial State in 100 Objects." From the Native American pottery of Mesa Verde to John Denver’s guitar, each of the 100 items tells a part of the state’s history.

“I like to tell my students, those who flunk history are doomed to repeat it,” he said.

Depending on the story, that might not be so bad.

Courtesy of David Abelson

Court documents in a pending lawsuit against the U.S. Fish and Wildlife Service say trails at the Rocky Flats National Wildlife Refuge in northern Colorado will be closed until at least Sept. 15.

Courtesy of David Abelson

Building a visitor center at a wildlife refuge doesn’t sound controversial. But when that refuge is on the site of the security buffer zone of a former nuclear weapons facility, it gets complicated quickly. Unless a federal court intervenes, a visitor center will open at the Rocky Flats Wildlife Refuge in Golden in the summer of 2018.