"When the engines aren't running and the station is offline, we usually hear some sounds of the outdoors, that are otherwise drowned out by the operating noise." Instead, with the engines not running, John and another team member, Garret Paugh, heard a cry for help coming from just outside the station and knew they needed to investigate.

The fact sheet describes key points about safety around TransCanada pipelines.

AMHERST, SOUTH DAKOTA--(Marketwired - Nov. 16, 2017) - News Release - TransCanada (TSX:TRP) (NYSE:TRP) crews safely shut down its Keystone pipeline at approximately 6 a.m. CST (5 a.m. MST) after a drop in pressure was detected in its operating system resulting from an oil leak that i...