Tar balls are being found 100 miles downstream from Yellowstone River train derailment
Tar balls have shown up 100 miles (161 kilometers) downstream of a railroad bridge collapse last month that sent numerous tank cars carrying petroleum products plummeting into Montana's Yellowstone River, officials said Friday, as dropping water levels and rising temperatures hinder cleanup work. Most of the spilled material — a binder for asphalt that sticks to river rocks and gets harder to handle as it warms — is expected to get left behind. Cleanup crews working this week on an island near the town of Laurel pulled long, taffy-like pieces of the asphalt from among the ...