1. Name and Address of Reporting Person* Montgomery Russell Lee (Last) (First) (Middle) 333 CLAY STREET SUITE 1600 (Street) HOUSTON TX 77002 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 09/01/2026	3. Issuer Name and Ticker or Trading Symbol PLAINS ALL AMERICAN PIPELINE LP [ PAA ] Foreign Trading Symbol
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner Officer (give title below) Other (specify below) VP, Acctg & CAO	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person Form filed by More than One Reporting Person

POWER OF ATTORNEY

Know all by these presents that the undersigned hereby constitutes and appoints
each of Richard McGee, Ann F. Gullion and Chris Griffith, or any of them
signing singly, and with full power of substitution, the undersigned's true
and lawful attorney-in-fact to:
(1) prepare, execute in the undersigned's name and on the undersigned's
behalf, and submit to the U.S. Securities and Exchange Commission (the SEC)
a Form ID, including amendments thereto, and any other documents necessary
or appropriate to obtain codes and passwords enabling the undersigned to
make electronic filings with the SEC of reports required by Section 16(a)
of the Securities Exchange Act of 1934 or any rule or regulation of the SEC;
(2) execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or director of Plains All American Pipeline, L.P.
(the "Company"), Forms 3, 4 and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules thereunder;
(3) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such
Form 3, 4 or 5, complete and execute any amendment or amendments thereto,
and timely file such form with the SEC and any stock exchange or similar
authority; and
(4) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit
to, in the best interest of, or legally required by, the undersigned, it
being understood that the documents executed by such attorney-in-fact on
behalf of the undersigned pursuant to this Power of Attorney shall be in
such form and shall contain such terms and conditions as such attorney-in-fact
may approve in such attorney-in-fact's discretion.
The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and
powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do or cause
to be done by virtue of this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that the foregoing attorneys-in-fact,
in serving in such capacity at the request of the undersigned, are not
assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Securities Exchange Act
of 1934.
This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect
to the undersigned's holdings of and transactions in securities issued by
the Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 10th day of September, 2026.

/s/ Russell Lee Montgomery