The accident comes less than a month after a railroad bridge collapse in southern Montana sent tanks cars with oil products plunging into the Yellowstone River

More than 66 tons of the black, gooey stuff have been removed from the river since the June 24 accident, officials said

The U.S. Environmental Protection Agency posted air quality alerts on Sunday because of smoke blowing in from Canadian wildfires

The separate requests for preliminary injunctions were filed in federal court in Missoula

Officials with the Environmental Protection Agency said cleanup efforts began on Sunday, with workers cooling the gooey material with river water, rolling it up and putting the globs into garbage bags

Officials in Montana, New Mexico and Arizona warned relocations could wreak ecological havoc as “invasive species” get purposefully introduced

Attorneys defending the Center for Asbestos Related Disease in the federal lawsuit deny the claims, arguing the clinic made its diagnoses in line with requirements of the 2009 Affordable Care Act, which included special provisions for the Libby victims

Harvey Hugs, 59, of Hardin was found guilty in February of three counts of violating the Bald and Golden Eagle Protection Act

The Navajo Nation-owned energy company runs three coal mines in the Powder River Basin of Montana and Wyoming and another near Farmington, New Mexico

Montana Rail Link is developing a cleanup plan and is working with its unions and BNSF Railway to reroute freight trains in the area

The seven mangled cars that carried hot asphalt and molten sulfur remained in the rushing river a day after the bridge gave way near the town of Columbus

There is no indication the contributions swayed the Democratic senator's decision making or that he committed any wrongdoing

Bans or restrictions are on hold in at least six states, including Montana, while judges sort out their long-term fate

The U.S. Fish and Wildlife Service plans to reinstate a decades-old regulation that mandates protections for species newly classified as threatened

The White House's plan would allow conservationists and others to lease federally owned land to restore it, much the same way oil companies buy leases to drill and ranchers pay to graze cattle