https://www.cbsnews.com/news/oil-spill-in-yellowstone-river-in-montana-caught-pretty-quick/
Oil spill in Yellowstone River in Montana "caught pretty quick" - CBS News
Montana officials say 50K gallons of oil may have spilled into picturesque river, but actual damage remains unclear
yellowstone river montanaoil spill
https://msl.mt.gov/geoinfo/data/yellowstone_river/
Yellowstone River Clearinghouse | Montana State Library
yellowstone rivermontana stateclearinghouselibrary