The signs released by the U.S. Army Corps of Engineers warn of "low-level radioactive materials present" near Coldwater Creek in St. Louis. Federal officials plan to post warning signs along a ...

Add Yahoo as a preferred source to see more of our stories on Google. Visitors entering the Rocky Flats National Wildlife Refuge are now seeing two very different messages about safety — posted just ...

An undated photo from the 1980s, of two teenagers stepping on rocks and wooden planks on Coldwater Creek. The photo is from a scrapbook kept by Sandy Delcoure, who lived on Willow Creek in Florissant ...

Local officials said the signs warning of exposure to radioactive materials are in response to public concern.

At Rocky Flats National Wildlife Refuge, differing safety messages spark debate: federal signs assure its safety, while county warnings highlight danger.

Federal officials plan to post warning signs along a contaminated suburban St. Louis creek where generations of children were exposed to radioactive material. Coldwater Creek, which winds between ...