CALGARY, ALBERTA--(Marketwired - Sept. 6, 2017) - Media Advisory - TransCanada Corporation (TSX:TRP)(NYSE:TRP) (TransCanada) today announced an extension of the Keystone System Open Season to October 26, 2017 due to the historic flooding and catastrophic impacts to Houston and parts of the U.S. Gulf Coast.

North Montney Mainline Project — Commitment Tracking Table No. 82

TC Energy’s NGTL System delivers energy to millions of North Americans every day as an essential part of the TC Energy pipeline network.

Learn more about Project details for Illinois, including schedule, map, technology, design, regulatory process, route selection, engagement, construction, benefits, environment and contact information.

Learn more about Project details for Wisconsin, including schedule, map, technology, design, regulatory process, route selection, engagement, construction, benefits, environment and contact information.

TC Energy — Port Neches Link Project — Map

Keystone System — NEB Tariff No. 23

TransCanada today announced its Northwest Mainline Loop-Boundary Lake pipeline has been placed into service, completing the final section of its 2017 Expansion Program on the NOVA Gas Transmission Ltd. (NGTL) System.

Learn more about Project details for Illinois, including schedule, map, technology, design, regulatory process, route selection, engagement, construction, benefits, environment and contact information.

TransCanada Corporation today announced that it has successfully completed its second binding expansion capacity Open Season at the Empress/McNeill Export Delivery Point on its NOVA Gas Transmission Ltd. (NGTL) System in 2018.