https://www.mprnews.org/story/2018/11/25/year-after-keystone-oil-leak-final-investigative-report-still-pending
[The world's experts on building oil pipelines apparently still can't
build on which can last even a few years without major leaks. The Nexen
pipeline in northern Alberta - deemed state of the art when built -
suffered a massive breach when it was just 3 years old. The alerting
system built into the Nexen pipeline never signalled an alarm.]
A year after Keystone oil leak, final investigative report still pending
Associated Press · Aberdeen, S.D. · Nov 25, 2018
It's been a year since the Keystone pipeline leaked about 407,000
gallons of oil in northeastern South Dakota, and while the damage has
been mitigated, a final federal investigation report has yet to be released.
The rural Marshall County site has been cleaned up, but there's still no
final investigation report from the federal Pipeline and Hazardous
Materials Safety Administration, the Aberdeen News reported.
The Nov. 28, 2017, Keystone leak is the seventh-largest onshore oil or
petroleum product spill since 2010. The pipeline is owned by TransCanada
and carries crude oil more than 2,600 miles from eastern Alberta to
Oklahoma and Illinois.
"While we firmly believe no incident is acceptable and deeply regret
that this occurred, our teams executed our emergency response and
cleanup procedures effectively, in close cooperation with regulatory
agencies, community members and landowners," said Robynn Tysver, a
spokeswoman for TransCanada.
The pipeline was likely damaged during installation during 2008,
according to a July report from the National Transportation Safety
Board, which is separate from the Pipeline and Hazardous Materials
Safety Administration's report. The damage may have occurred when a
vehicle drove over the pipe, causing it to weaken overtime.
The pipeline has had 14 leaks, most of which were minor, since it was
commissioned in 2010, according to a federal spill database. TransCanada
has worked to improve the pipeline's conditions, including unearthing a
section of the pipeline about 15 miles north of the rupture site to
perform maintenance.
