Nature World News | Montana Oil Spill Renews Worries Over Pipeline Safety ABC News A second large oil spill into Montana's Yellowstone River in less than four years is reviving questions about oversight of the nation's aging pipeline infrastructure. Investigators and company officials on Wednesday tried to determine the cause of the ... Water supply off-limits in Montana town after Yellowstone River oil spill Some oil recovered from broken pipeline after river spill Traces of Montana Oil Spill Are Found in Drinking Water |