The reporting regulations and incident report formats have changed several times over the years Phmsa merged the various report formats to create pipeline incident trend lines going back 20 years The trend links will initially present reports including all data for the incident type The table below lists the year. Transmission pipelines are typically inspected by companies once a year, but the hopkins team's results suggest current inspection methods may miss or underreport leaks Factors such as terrain, pipeline depth, and how emissions spread through soil make measuring leaks difficult.
While an investigation into a major oil leak on the keystone pipeline continues, a 2021 federal report shows the conduit recorded 22 accidents between 2010 and 2020. South bow, a liquid pipelines business that has managed the keystone pipeline since 2024, said control center leak detection systems detected a pressure drop in the system and initiated a shutdown. The leaks have varied in size, but in total the keystone pipeline has spilled more than 1 million gallons of crude oil over the years. The state division of environmental quality says the pipeline was shut down. The keystone oil pipeline has been shut down after it ruptured in north dakota, halting the flow of thousands of gallons of crude oil from canada to refineries in the u.s.
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