Did you know that there used to be a nuclear weapons production facility on the Front Range of Colorado? Some people that I talk to are surprised to learn that Rocky Flats Wildlife Refuge hasn't always been a sanctuary for Colorado's wildlife. READ MORE: You Won’t Believe How Many Baby Bison Were Just Born Near DenverA $7 billion cleanup of Rocky Flats was completed in 2005, but activists still argue that the remediation of dangerous particles that include plutonium, americium, uranium, beryllium, and radioactive lead still remains in the soil and in the air surrounding Rocky Flats. New Signs to Inform Rocky Flats Wildlife Refuge VisitorsAccording to Denver7, the City of Westminster will install new signage that warns hikers, bikers, and outdoor enthusiasts to make informed decisions before entering the Rocky Flats Wildlife Refuge, and that visitors may be exposed to radioactive materials. READ MORE: Shocking Documentary Explores Colorado’s “Atomic Bomb Factory”While signs have been in place at Rocky Flats for years, the City of Westminster will install new signs at the bridge over Indiana Street in the next few weeks.