Plains All American Pipeline Announces Extension of Open Season for Permian Basin to Cushing Pipeline

A subsidiary of Plains All American Pipeline, L.P. (NYSE: PAA) today announced that the open season for committed crude oil pipeline capacity from Midland, TX/Colorado City, TX to Cushing, OK that commenced on April 18, 2017 has been extended to 5 p.m. CT on June 9, 2017 to incorporate certain modifications requested by shippers.

Potential shippers who have signed a confidentiality agreement will be sent the final TSA by June 9, 2017. Each potential shipper that wishes to become a committed shipper must execute and submit two copies of the final version of the TSA no later than 5 p.m. CT on June 9, 2017.

Interested parties should contact Bill Keener, Managing Director Pipeline Commercial Operations at 713-993-5144.

Forward Looking Statements

This press release may include certain statements concerning expectations for the future that are forward-looking statements as defined by federal law. Such forward-looking statements are subject to a variety of known and unknown risks, uncertainties, and other factors that are difficult to predict and many of which are beyond management’s control. An extensive list of factors that can affect future results are discussed in each registrant’s Annual Report on Form 10-K and other documents filed from time to time with the Securities and Exchange Commission. The registrants undertake no obligation to update or revise any forward-looking statement to reflect new information or events.

Plains All American Pipeline, L.P. is a publicly traded master limited partnership that owns and operates midstream energy infrastructure and provides logistics services for crude oil, natural gas liquids ("NGL"), natural gas and refined products. PAA owns an extensive network of pipeline transportation, terminalling, storage and gathering assets in key crude oil and NGL producing basins and transportation corridors and at major market hubs in the United States and Canada. On average, PAA handles over 4.7 million barrels per day of crude oil and NGL in its Transportation segment. PAA is headquartered in Houston, Texas. More information is available at www.plainsallamerican.com.

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Plains All AmericanInvestors:Brett Magill, [phone]Manager, Investor Relations