April, 30, 2014: A CSX oil train derails in downtown Lynchburg, Va., spilling oil into the James River and igniting a massive fire.
May 7, 2014: In response to the Lynchburg derailment and others, the U.S. Department of Transportation issues an emergency order. It requires railroads shipping 1 million gallons or more of Bakken crude oil to notify state officials what routes the trains take and through which counties, and how many trains pass through each state during a given week.
June 7, 2014: McClatchy submits a request for oil train reports from the West Virginia Division of Homeland Security and Emergency Management.
June 10, 2014: McClatchy submits a request for oil train reports from the Maryland Department of the Environment; West Virginia releases oil train reports to McClatchy with routes, counties and weekly frequencies redacted.
July 9, 2014: McClatchy submits requests for oil train reports from the Texas Department of Public Safety and the Pennsylvania Emergency Management Agency.
July 15, 2014: The Pennsylvania Emergency Management Agency denies McClatchy's request.
July 23, 2014: Norfolk Southern and CSX sue Maryland to block the release of oil train reports to McClatchy.
Aug. 4, 2014: McClatchy files an appeal to the Pennsylvania Office of Open Records.
Aug. 29, 2014: Railroad industry trade groups ask the Federal Railroad Administration to drop the May 7 emergency order, citing security and business concerns.
Oct. 3, 2014: The Pennsylvania Office of Open Records orders the state Emergency Management Agency to release oil train records to McClatchy; the Federal Railroad Administration rejects rail industry trade groups' request to end the May 7 emergency order.
Feb. 16, 2015: A CSX oil train derails near Mount Carbon, W.Va. Fires and explosions result in the evacuation of 1,000 residents. West Virginia still declines to make oil train reports public.
Feb. 19, 2015: The Texas Attorney General's Office orders the state Department of Public Safety to release oil train reports to McClatchy.
May 1, 2015: The U.S. Department of Transportation unveils its final rule on oil trains; existing notification requirements to end in March 2016, replaced with notification protocol that eliminates public disclosure.