Keystone to Resume Crude Oil Deliveries on Tuesday

AMHERST, SOUTH DAKOTA--(Marketwired - Nov. 27, 2017) - Media Advisory - TransCanada Corporation (TSX:TRP) (NYSE:TRP) (TransCanada) announced that its Keystone Pipeline repair and restart plans have been reviewed by the Pipeline and Hazardous Materials Safety Administration (PHMSA) with no objections, permitting a safe and controlled return to service of the Keystone System.

As part of the reviewed plans, TransCanada will operate the pipeline at a reduced pressure starting on Tuesday, November 28, 2017, to ensure a safe and gradual increase in the volume of crude oil moving through the system. We are communicating plans to our customers and will continue working closely with them as we begin to return to normal operating conditions. TransCanada will comply with any future PHMSA orders and requirements as a result of this incident to ensure the integrity of the pipeline.

We appreciate the continued cooperation and support from local officials, emergency response personnel and commissioners in Marshall County, as well as the landowner who has granted permission to access land for assessment, repair and clean-up activities. We also want to recognize the continued efforts of our crews, contractors and businesses in the community for their around-the-clock support, which has allowed us to respond quickly and safely to this event.

With more than 65 years' experience, TransCanada is a leader in the responsible development and reliable operation of North American energy infrastructure including natural gas and liquids pipelines, power generation and gas storage facilities. TransCanada operates one of the largest natural gas transmission networks that extends more than 91,500 kilometres (56,900 miles), tapping into virtually all major gas supply basins in North America. TransCanada is the continent's leading provider of gas storage and related services with 653 billion cubic feet of storage capacity. A large independent power producer, TransCanada currently owns or has interests in approximately 6,200 megawatts of power generation in Canada and the United States. TransCanada is also the developer and operator of one of North America's leading liquids pipeline systems that extends approximately 4,800 kilometres (3,000 miles), connecting growing continental oil supplies to key markets and refineries. TransCanada's common shares trade on the Toronto and New York stock exchanges under the symbol TRP. Visit TransCanada.com to learn more, or connect with us on social media and 3BL Media .