Introduction



The following discussion is intended to provide investors with an understanding
of our financial condition and results of our operations and should be read in
conjunction with our historical Consolidated Financial Statements and
accompanying notes. Unless the context otherwise requires, references to "we,"
"us," "our," and "PAGP" are intended to mean the business and operations of PAGP
and its consolidated subsidiaries.

Our discussion and analysis includes the following:



•Executive Summary
•Critical Accounting Policies and Estimates
•Recent Accounting Pronouncements
•Results of Operations
•Liquidity and Capital Resources

A comparative discussion of our 2019 to 2018 operating results and performance
measures can be found in Item 7. "Management's Discussion and Analysis of
Financial Condition and Results of Operations-Results of Operations" included in
our Annual Report on Form 10-K for the year ended December 31, 2019 filed with
the SEC on February 27, 2020.

Executive Summary

Company Overview



We are a Delaware limited partnership formed in 2013 that has elected to be
taxed as a corporation for United States federal income tax purposes. As of
December 31, 2020, our sole cash-generating assets consisted of (i) a 100%
managing member interest in GP LLC, an entity that has also elected to be taxed
as a corporation for United States federal income tax purposes and (ii) an
approximate 79% limited partner interest in AAP through our direct ownership of
approximately 193.1 million AAP units and indirect ownership of approximately
1.0 million AAP units through GP LLC. GP LLC is a Delaware limited liability
company that also holds the non-economic general partner interest in AAP. AAP is
a Delaware limited partnership that, as of December 31, 2020, directly owned a
limited partner interest in PAA through its ownership of approximately 245.8
million PAA common units (approximately 31% PAA's total outstanding common units
and Series A preferred units combined). AAP is the sole member of PAA GP, a
Delaware limited liability company that directly holds the non-economic general
partner interest in PAA.

PAA's business model integrates large-scale supply aggregation capabilities with
the ownership and operation of critical midstream infrastructure systems that
connect major producing regions to key demand centers and export terminals. As
one of the largest midstream service providers in North America, PAA owns an
extensive network of pipeline transportation, terminalling, storage and
gathering assets in key crude oil and NGL producing basins (including the
Permian Basin) and transportation corridors and at major market hubs in the
United States and Canada. PAA's assets and the services it provides are
primarily focused on crude oil, NGL and natural gas. PAA's business activities
are conducted through three operating segments: Transportation, Facilities and
Supply and Logistics. See "-Results of Operations-Analysis of Operating
Segments" for further discussion.

Recent Events and Outlook



During the first quarter of 2020, COVID-19 escalated into a global pandemic,
which led to widespread shelter-in-place or similar requirements throughout
North America and across the world, resulting in significantly reduced energy
demand. As a result, North American producers responded aggressively by shutting
in significant levels of production early in the second quarter, which mitigated
the pace of crude oil inventory builds and the risk of testing storage maximums.
Subsequently, United States refinery utilization increased, the previously steep
contango market structure tempered, and crude oil prices improved to more
constructive levels. Over the course of the second half of the year, the more
constructive price environment allowed oil and gas producers to return to
production wells that were previously shut-in, resume completion activities and
begin to increase drilling activities during the third quarter at a level that
is lower than pre-pandemic, but likely at a level that is sufficient to offset
natural declines.

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While prices have rebounded to levels that are near pre-pandemic levels,
drilling activity is at a fraction of pre-pandemic levels as evidenced by the
Lower 48 rig count, which is approximately 40% of peak levels reached in 2020
pre-COVID-19. Many oil and gas producers in the United States have publicly
stated their intention to reduce capital investment in oil and gas drilling
activities in 2021 as they strive to improve their financial metrics and
increase returns to shareholders. Accordingly, we expect oil and gas drilling
activities to continue to be lower than pre-pandemic levels which in turn will
slow the growth in oil production, relative to pre-pandemic expectations of
production growth. We expect that the combination of a muted growth in
production, with excess pipeline capacity in most of our operating areas will
have a negative impact on our business relative to pre-pandemic levels, with the
impacts in 2021 being more pronounced than in 2020.

Similar to the actions taken by oil and gas producers, we have implemented a
number of initiatives, as described below, to ensure that we are positioned to
manage through the current challenging market environment. Longer term, we
expect global demand for hydrocarbons will recover, which should drive higher
production levels in key onshore shale basins, which should support growing
demand for our assets. Also see Items 1. and 2. "Business and Properties-Global
Petroleum Market Overview and Fundamental Themes" for additional information.

Our response to the challenging near-term market conditions has been to focus on
measures to strengthen our balance sheet, liquidity and long-term financial
flexibility. These actions include significantly reducing our capital program,
reducing the amount of our common equity distributions, progressing asset sales,
and reducing costs, while remaining focused on operating safely and responsibly.

Specifically, since April, we have reduced our 2020/2021 capital program by $950
million, or 41%, and have decreased PAA's common unit distributions and our
Class A share distributions by 50% versus the distributions paid in February
2020, which reflects a reduction of $525 million on an annualized basis. We have
also completed approximately $450 million of asset sales. While each of these
actions should contribute to a stronger balance sheet and enhanced liquidity and
long-term financial flexibility, we can provide no assurance that we will be
able to effect certain future actions (such as additional capital reductions,
asset sales and expense reductions) and additional actions may be necessary to
achieve our balance sheet, liquidity and financial security objectives. See
"Risk Factors-Risks Related to PAA's Business" in Item 1A.

While some modifications in our operations have been necessary to deal with
risks associated with the COVID-19 pandemic, we have not experienced any
material constraints in our ability to continue our essential business functions
and have not incurred any significant additional operating costs as a result of
the pandemic. We remain focused on the health and safety of our workforce, and
have modified our operations in ways that we believe are prudent and appropriate
in order to protect our employees while continuing to operate our assets in an
effective, safe and responsible manner.

In addition, many governments have enacted or are contemplating measures to
provide aid and economic stimulus in response to the COVID-19 pandemic. These
measures include actions by both the United States federal government and the
government of Canada. There has been no material direct impact to our financial
position, results of operations or cash flows resulting from these measures.
However, our Canadian subsidiary participated in a wage subsidy program during
the second, third and fourth quarters of 2020 for subsidies totaling
approximately $23 million. The impact of such subsidies is included in the line
items "Field operating costs" and "Segment general and administrative expenses"
of the applicable segments. See "-Results of Operations-Analysis of Operating
Segments" for further discussion.

Overview of Operating Results, Capital Investments and Other Significant Activities



The macroeconomic and industry specific challenges discussed above have resulted
in a number of impairment charges recognized during 2020 as discussed further
below. See "-Liquidity and Capital Resources" for additional discussion of the
expected and potential impact of COVID-19 and related market conditions on our
business.

We recognized a net loss of $2.440 billion for the year ended December 31, 2020
compared to net income of $2.062 billion recognized for the year ended December
31, 2019. The net loss for the period was driven by goodwill impairment losses
of $2.515 billion and was also impacted by non-cash impairment charges of
approximately $914 million related to the write-down of certain pipeline and
other long-lived assets, certain of our investments in unconsolidated entities,
and assets upon classification as held for sale. In addition, we recognized
approximately $233 million of inventory valuation adjustments due to declines in
commodity prices primarily during the first quarter of 2020.

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Our results for the comparative period were also impacted by:

•Less favorable results from our Supply and Logistics segment due to less
favorable crude oil differentials, lower NGL margins and the unfavorable impact
of the mark-to-market of certain derivative instruments, resulting in higher
losses recognized in 2020 compared to 2019, partially offset by the favorable
impact of contango market conditions during 2020;

•Less favorable results from our Transportation segment driven by lower volumes
from shut-ins of crude oil production, reduced drilling and completion activity
and compressed regional basis differentials, a portion of which are covered by
minimum volume commitments that will be made up or paid for in future periods,
and lower pipeline loss allowance revenue in 2020 due to lower prices and
volumes, partially offset by lower field operating costs;

•Higher depreciation and amortization expense in the 2020 period primarily due
to additional depreciation expense associated with acquired assets, the
completion of various investment capital projects and a reduction in the useful
lives of certain assets;

•A gain of $21 million recognized in the current period related to the sale of a
portion of our interest in Saddlehorn Pipeline Company, LLC in February 2020,
compared to a non-cash gain of $269 million recognized in the 2019 period
related to a fair value adjustment resulting from the accounting for the
contribution of our undivided joint interest in the Capline pipeline system for
an equity interest in Capline Pipeline Company LLC; partially offset by

•Favorable results from our Facilities segment primarily due to lower field operating costs; and



•The favorable impact on income tax expense of (i) lower income attributable to
PAGP as a result of lower earnings at PAA and (ii) lower taxable earnings and
lower year-over-year income as impacted by fluctuations in the derivative
mark-to-market valuations in our Canadian operations.

See further discussion of our operating results in the "-Results of Operations-Analysis of Operating Segments" and "-Other Income and Expenses" sections below.



We invested $921 million in midstream infrastructure projects during 2020, which
primarily related to projects under development in the Permian Basin. See
"-Liquidity and Capital Resources-Investing Activities-Investment Capital
Projects" for additional information. Additionally, during the first quarter of
2020, we acquired $310 million of assets, which primarily included a crude oil
gathering system located in the Delaware Basin.

We also paid approximately $863 million of cash distributions to our Class A Shareholders and noncontrolling interests during 2020.



In June 2020, PAA completed the issuance of $750 million, 3.80% senior notes due
September 2030. We used the net proceeds from this offering of $742 million,
after deducting the underwriting discount and offering expenses, to repay the
principal amounts of PAA's 5.00% senior notes due February 2021 in November
2020. See "-Liquidity and Capital Resources-Financing Activities-Senior Notes"
for additional information.

During the fourth quarter of 2020, PAA repurchased 6.6 million common units for
$53 million, which includes repurchases of 350,000 common units for $3 million
that did not settle until January 2021. See "-Liquidity and Capital
Resources-Financing Activities-Common Equity Repurchase Program" for additional
information.

Critical Accounting Policies and Estimates



The preparation of financial statements in conformity with GAAP and rules and
regulations of the SEC requires us to make estimates and assumptions that affect
the reported amounts of assets and liabilities, as well as the disclosure of
contingent assets and liabilities, at the date of the financial statements. Such
estimates and assumptions also affect the reported amounts of revenues and
expenses during the reporting period. Although we believe these estimates are
reasonable, actual results could differ from these estimates. On a regular
basis, we evaluate our assumptions, judgments and estimates.  We also discuss
our critical accounting policies and estimates with the Audit Committee of the
Board of Directors.

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We believe that the assumptions, judgments and estimates involved in the
accounting for our (i) estimated fair value of assets and liabilities acquired
and identification of associated goodwill and intangible assets, (ii) impairment
assessments of goodwill and intangible assets, (iii) fair value of derivatives,
(iv) accruals and contingent liabilities, (v) property and equipment,
depreciation and amortization expense and asset retirement obligations, (vi)
impairment assessments of property and equipment and investments in
unconsolidated entities and (vii) inventory valuations have the greatest
potential impact on our Consolidated Financial Statements. These areas are key
components of our results of operations and are based on complex rules which
require us to make judgments and estimates. Therefore, we consider these to be
our critical accounting policies and estimates, which are discussed further as
follows. For further information on all of our significant accounting policies,
see Note 2 to our Consolidated Financial Statements.

Fair Value of Assets and Liabilities Acquired and Identification of Associated
Goodwill and Intangible Assets. In accordance with Financial Accounting
Standards Board ("FASB") guidance regarding business combinations, with each
acquisition, we allocate the cost of the acquired entity to the assets and
liabilities assumed based on their estimated fair values at the date of
acquisition. If the initial accounting for the business combination is
incomplete when the combination occurs, an estimate will be recorded. We also
expense the transaction costs as incurred in connection with each acquisition,
except for acquisitions of equity method investments. In addition, we are
required to recognize intangible assets separately from goodwill.

Determining the fair value of assets and liabilities acquired, as well as
intangible assets that relate to such items as customer relationships, acreage
dedications and other contracts, involves professional judgment and is
ultimately based on acquisition models and management's assessment of the value
of the assets acquired and, to the extent available, third-party assessments.

Impairment Assessments of Goodwill and Intangible Assets. Goodwill and
intangible assets with indefinite lives are not amortized but are instead
periodically assessed for impairment. Intangible assets with finite lives are
amortized over their estimated useful life as determined by management. See Note
8 and Note 10 to our Consolidated Financial Statements for further discussion of
goodwill and intangible assets.

Impairment testing entails estimating future net cash flows relating to the
business, based on management's estimate of future revenues, future cash flows
and market conditions including pricing, demand, competition, operating costs
and other factors. Uncertainties associated with these estimates include changes
in production decline rates, production interruptions, fluctuations in refinery
capacity or product slates, economic obsolescence factors in the area and
potential future sources of cash flow. In addition, changes in our weighted
average cost of capital from our estimates could have a significant impact on
fair value. We cannot provide assurance that actual amounts will not vary
significantly from estimated amounts. Resolutions of these uncertainties have
resulted, and in the future may result, in impairments that impact our results
of operations and financial condition.

Fair Value of Derivatives. The fair value of a derivative at a particular period
end does not reflect the end results of a particular transaction, and will most
likely not reflect the gain or loss at the conclusion of a transaction. We
reflect estimates for these items based on our internal records and information
from third parties. We have commodity derivatives, interest rate derivatives
and foreign currency derivatives that are accounted for as assets and
liabilities at fair value on our Consolidated Balance Sheets. The valuations of
our derivatives that are exchange traded are based on market prices on the
applicable exchange on the last day of the period. For our derivatives that are
not exchange traded, the estimates we use are based on indicative broker
quotations or an internal valuation model. Our valuation models utilize market
observable inputs such as price, volatility, correlation and other factors and
may not be reflective of the price at which they can be settled due to the lack
of a liquid market. Less than 1% of total annual revenues are based on estimates
derived from internal valuation models.

We also have embedded derivatives that are recorded at fair value on our Consolidated Balance Sheets. These embedded derivatives are valued using models that contain inputs, some of which involve management judgment.



Although the resolution of the uncertainties involved in these estimates has not
historically had a material impact on our results of operations or financial
condition, we cannot provide assurance that actual amounts will not vary
significantly from estimated amounts. See Item 7A.  Quantitative and Qualitative
Disclosures About Market Risk and Note 13 to our Consolidated Financial
Statements for a discussion regarding our derivatives and risk management
activities.

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Accruals and Contingent Liabilities.  We record accruals or liabilities for,
among other things, environmental remediation, potential legal claims or
settlements and fees for legal services associated with loss contingencies, and
bonuses. Accruals are made when our assessment indicates that it is probable
that a liability has occurred and the amount of liability can be reasonably
estimated. Our estimates are based on all known facts at the time and our
assessment of the ultimate outcome. Among the many uncertainties that impact our
estimates are the necessary regulatory approvals for, and potential modification
of, our environmental remediation plans, the limited amount of data available
upon initial assessment of the impact of soil or water contamination, changes in
costs associated with environmental remediation services and equipment, the
duration of the natural resource damage assessment and the ultimate amount of
damages determined, the determination and calculation of fines and penalties,
the possibility of existing legal claims giving rise to additional claims and
the nature, extent and cost of legal services that will be required in
connection with lawsuits, claims and other matters. Our estimates for contingent
liability accruals are increased or decreased as additional information is
obtained or resolution is achieved. A hypothetical variance of 5% in our
aggregate estimate for the accruals and contingent liabilities discussed above
would have an impact on earnings of up to approximately $19 million. Although
the resolution of these uncertainties has not historically had a material impact
on our results of operations or financial condition, we cannot provide assurance
that actual amounts will not vary significantly from estimated amounts.

Property and Equipment, Depreciation and Amortization Expense and Asset
Retirement Obligations. We compute depreciation and amortization using the
straight-line method based on estimated useful lives. These estimates are based
on various factors including condition, manufacturing specifications,
technological advances and historical data concerning useful lives of similar
assets. Uncertainties that impact these estimates include changes in laws and
regulations relating to restoration and abandonment requirements, economic
conditions and supply and demand in the area. When assets are put into service,
we make estimates with respect to useful lives and salvage values that we
believe are reasonable. However, subsequent events could cause us to change our
estimates, thus impacting the future calculation of depreciation and
amortization.

We record retirement obligations associated with tangible long-lived assets
based on estimates related to the costs associated with cleaning, purging and,
in some cases, completely removing the assets and returning the land to its
original state. In addition, our estimates include a determination of the
settlement date or dates for the potential obligation, which may or may not be
determinable. Uncertainties that impact these estimates include the costs
associated with these activities and the timing of incurring such costs.

Impairment Assessments of Property and Equipment and Investments in
Unconsolidated Entities. We periodically evaluate property and equipment for
impairment when events or circumstances indicate that the carrying value of
these assets may not be recoverable. Any evaluation is highly dependent on the
underlying assumptions of related cash flows. We consider the fair value
estimate used to calculate impairment of property and equipment a critical
accounting estimate. In determining the existence of an impairment of carrying
value, we make a number of subjective assumptions as to:

•whether there is an event or circumstance that may be indicative of an
impairment;
•the grouping of assets;
•the intention of "holding", "abandoning" or "selling" an asset;
•the forecast of undiscounted expected future cash flow over the asset's
estimated useful life; and
•if an impairment exists, the fair value of the asset or asset group.

In addition, when we evaluate property and equipment and other long-lived assets for recoverability, it may also be necessary to review related depreciation estimates and methods.



Investments in unconsolidated entities accounted for under the equity method of
accounting are assessed for impairment when events or circumstances suggest that
a decline in value may be other than temporary. Examples of such events or
circumstances include continuing operating losses of the entity and/or long-term
negative changes in the entity's core business. When it is determined that an
indicated impairment is other than temporary, a charge is recognized for the
difference between the investment's carrying amount and its estimated fair
value. We consider the fair value estimate used to calculate the impairment of
investments in unconsolidated entities a critical accounting estimate. In
determining the existence of an other-than-temporary impairment of carrying
value, we make a number of subjective assumptions as to:

•whether there is an event or circumstance that may be indicative of a decline
in value of the investment;
•whether the decline in value is other than temporary; and
•the fair value of the investment.
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A change in our outlook or use could result in impairments that may be material
to our results of operations or financial condition. See "-Executive Summary-
Recent Events and Outlook" and Note 6 and Note 9 to our Consolidated Financial
Statements for additional information.

Inventory Valuations.  Inventory, including long-term inventory, primarily
consists of crude oil and NGL and is valued at the lower of cost or net
realizable value, with cost determined using an average cost method within
specific inventory pools. At the end of each reporting period, we assess the
carrying value of our inventory and use estimates and judgment when making any
adjustments necessary to reduce the carrying value to net realizable value.
Among the uncertainties that impact our estimates are the applicable quality and
location differentials to include in our net realizable value analysis.
Additionally, we estimate the upcoming liquidation timing of the inventory.
Changes in assumptions made as to the timing of a sale can materially impact net
realizable value. During the years ended December 31, 2020, 2019 and 2018, we
recorded charges of $233 million, $11 million and $8 million, respectively,
related to the valuation adjustment of our crude oil inventory due to declines
in prices. See Note 5 to our Consolidated Financial Statements for further
discussion regarding inventory.

Recent Accounting Pronouncements



See Note 2 to our Consolidated Financial Statements for information regarding
the effect of recent accounting pronouncements on our Consolidated Financial
Statements.

Results of Operations

The following table sets forth an overview of our consolidated financial results calculated in accordance with GAAP (in millions, except per share amounts):



                                                                Year Ended December 31,                       Variance
                                                                 2020                    2019                          $                 %
Transportation Segment Adjusted EBITDA (1)              $      1,616                  $ 1,722                      $  (106)                (6) %
Facilities Segment Adjusted EBITDA (1)                           731                      705                           26                  4  %
Supply and Logistics Segment Adjusted EBITDA (1)                 210                      803                         (593)               (74) %

Adjustments:


Depreciation and amortization of unconsolidated
entities                                                         (73)                     (62)                         (11)               (18) %
Selected items impacting comparability - Segment
Adjusted EBITDA                                                 (617)                    (163)                        (454)                   **
Unallocated general and administrative expenses                   (5)                      (5)                           -                  -  %
Depreciation and amortization                                   (656)                    (604)                         (52)                (9) %

Gains/(losses) on asset sales and asset impairments, net

                                                             (719)                     (28)                        (691)                   **
Goodwill impairment losses                                    (2,515)                       -                       (2,515)                  N/A
Gain on/(impairment of) investments in unconsolidated
entities, net                                                   (182)                     271                         (453)              (167) %
Interest expense, net                                           (436)                    (425)                         (11)                (3) %
Other income, net                                                 39                       24                           15                 63  %
Income tax (expense)/benefit                                     167                     (176)                         343                195  %
Net income/(loss)                                             (2,440)                   2,062                       (4,502)              (218) %
Net (income)/loss attributable to noncontrolling
interests                                                      1,872                   (1,731)                       3,603                208  %
Net income/(loss) attributable to PAGP                  $       (568)                 $   331                      $  (899)              (272) %

Basic net income/(loss) per Class A share               $      (3.06)                 $  1.97                      $ (5.03)                   **
Diluted net income/(loss) per Class A share             $      (3.07)                 $  1.96                      $ (5.03)                   **
Basic weighted average Class A shares outstanding                186                      168                           18                    **
Diluted weighted average Class A shares outstanding              246                      170                           76                    **





**   Indicates that variance as a percentage is not meaningful.
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(1)Segment Adjusted EBITDA is the measure of segment performance that is
utilized by our Chief Operating Decision Maker ("CODM") to assess performance
and allocate resources among our operating segments. This measure is adjusted
for certain items, including those that our CODM believes impact comparability
of results across periods. See Note 21 to our Consolidated Financial Statements
for additional discussion of such adjustments.

Non-GAAP Financial Measures

To supplement our financial information presented in accordance with GAAP, management uses additional measures known as "non-GAAP financial measures" in its evaluation of past performance and prospects for the future.



The primary additional measure used by management is earnings before interest,
taxes, depreciation and amortization (including our proportionate share of
depreciation and amortization of unconsolidated entities), gains and losses on
asset sales and asset impairments, goodwill impairment losses and gains on and
impairments of investments in unconsolidated entities, adjusted for certain
selected items impacting comparability ("Adjusted EBITDA").

Our definition and calculation of certain non-GAAP financial measures may not be
comparable to similarly-titled measures of other companies. Adjusted EBITDA is
reconciled to Net Income/(Loss), the most directly comparable measure as
reported in accordance with GAAP, and should be viewed in addition to, and not
in lieu of, our Consolidated Financial Statements and accompanying notes.

Management believes that the presentation of such additional financial measure
provides useful information to investors regarding our performance and results
of operations because this measure, when used to supplement related GAAP
financial measures, (i) provide additional information about our core operating
performance, (ii) provide investors with the same financial analytical framework
upon which management bases financial, operational, compensation and
planning/budgeting decisions and (iii) present measurements that investors,
rating agencies and debt holders have indicated are useful in assessing us and
our results of operations. This non-GAAP measure may exclude, for example,
(i) charges for obligations that are expected to be settled with the issuance of
equity instruments, (ii) gains and losses on derivative instruments that are
related to underlying activities in another period (or the reversal of such
adjustments from a prior period), gains and losses on derivatives that are
related to investing activities (such as the purchase of linefill) and inventory
valuation adjustments, as applicable, (iii) long-term inventory costing
adjustments, (iv) items that are not indicative of our core operating results
and business outlook and/or (v) other items that we believe should be excluded
in understanding our core operating performance. This measure may further be
adjusted to include amounts related to deficiencies associated with minimum
volume commitments whereby we have billed the counterparties for their
deficiency obligation and such amounts are recognized as deferred revenue in
"Other current liabilities" in our Consolidated Financial Statements. Such
amounts are presented net of applicable amounts subsequently recognized into
revenue. We have defined all such items as "selected items impacting
comparability." We do not necessarily consider all of our selected items
impacting comparability to be non-recurring, infrequent or unusual, but we
believe that an understanding of these selected items impacting comparability is
material to the evaluation of our operating results and prospects.

Although we present selected items impacting comparability that management considers in evaluating our performance, you should also be aware that the items presented do not represent all items that affect comparability between the periods presented. Variations in our operating results are also caused by changes in volumes, prices, exchange rates, mechanical interruptions, acquisitions, divestitures, investment capital projects and numerous other factors as discussed, as applicable, in "-Analysis of Operating Segments."


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Index to Financial Statements The following table sets forth the reconciliation of our non-GAAP financial performance measure Adjusted EBITDA from Net Income/(Loss) (in millions):



                                                            Year Ended December 31,                       Variance
                                                             2020                    2019                           $                 %
Net income/(loss)                                   $      (2,440)                $ 2,062                      $ (4,502)              (218) %
Add/(Subtract):
Interest expense, net                                         436                     425                            11                  3  %
Income tax expense/(benefit)                                 (167)                    176                          (343)              (195) %
Depreciation and amortization                                 656                     604                            52                  9  %
(Gains)/losses on asset sales and asset
impairments, net                                              719                      28                           691                    **
Goodwill impairment losses                                  2,515                       -                         2,515                   N/A
(Gain on)/impairment of investments in
unconsolidated entities, net                                  182                    (271)                          453                167  %
Depreciation and amortization of unconsolidated
entities (1)                                                   73                      62                            11                 18  %

Selected Items Impacting Comparability: Losses from derivative activities net of inventory valuation adjustments (2)

                                     480                     160                           320                    **
Long-term inventory costing adjustments (3)                    44                     (20)                           64                    **

Deficiencies under minimum volume commitments, net (4)

                                                            74                     (18)                           92                    **
Equity-indexed compensation expense (5)                        19                      17                             2                    **
Net (gain)/loss on foreign currency revaluation (6)            (3)                     14                           (17)                   **
Line 901 incident (7)                                           -                      10                           (10)                   **
Significant acquisition-related expenses (8)                    3                       -                             3                    **
Selected Items Impacting Comparability - Segment
Adjusted EBITDA                                               617                     163                           454                    **
Gains from derivative activities (2)                          (20)                     (2)                          (18)                   **
Net gain on foreign currency revaluation (6)                  (13)                    (15)                            2                    **
Net gain on early repayment of senior notes (9)                (3)                      -                            (3)                   **
Selected Items Impacting Comparability - Adjusted
EBITDA (10)                                                   581                     146                           435                    **
Adjusted EBITDA (10)                                $       2,555                 $ 3,232                      $   (677)               (21) %





**   Indicates that variance as a percentage is not meaningful.
(1)Over the past several years, we have increased our participation in strategic
pipeline joint ventures accounted for under the equity method of accounting. We
exclude our proportionate share of the depreciation and amortization expense of
such unconsolidated entities when reviewing Adjusted EBITDA, similar to our
consolidated assets.
(2)We use derivative instruments for risk management purposes, and our related
processes include specific identification of hedging instruments to an
underlying hedged transaction. Although we identify an underlying transaction
for each derivative instrument we enter into, there may not be an accounting
hedge relationship between the instrument and the underlying transaction. In the
course of evaluating our results of operations, we identify the earnings that
were recognized during the period related to derivative instruments for which
the identified underlying transaction does not occur in the current period and
exclude the related gains and losses in determining Adjusted EBITDA. In
addition, we exclude gains and losses on derivatives that are related to
investing activities, such as the purchase of linefill. We also exclude the
impact of corresponding inventory valuation adjustments, as applicable. See
Note 13 to our Consolidated Financial Statements for a comprehensive discussion
regarding our derivatives and risk management activities.
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(3)We carry crude oil and NGL inventory that is comprised of minimum working
inventory requirements in third-party assets and other working inventory that is
needed for our commercial operations. We consider this inventory necessary to
conduct our operations and we intend to carry this inventory for the foreseeable
future. Therefore, we classify this inventory as long-term on our balance sheet
and do not hedge the inventory with derivative instruments (similar to linefill
in our own assets). We treat the impact of changes in the average cost of the
long-term inventory (that result from fluctuations in market prices) and
write-downs of such inventory that result from price declines as a selected item
impacting comparability. See Note 5 to our Consolidated Financial Statements for
additional inventory disclosures.
(4)We, and certain of our equity method investments, have certain agreements
that require counterparties to deliver, transport or throughput a minimum volume
over an agreed upon period. Substantially all of such agreements were entered
into with counterparties to economically support the return on our capital
expenditure necessary to construct the related asset. Some of these agreements
include make-up rights if the minimum volume is not met. We record a receivable
from the counterparty in the period that services are provided or when the
transaction occurs, including amounts for deficiency obligations from
counterparties associated with minimum volume commitments. If a counterparty has
a make-up right associated with a deficiency, we defer the revenue attributable
to the counterparty's make-up right and subsequently recognize the revenue at
the earlier of when the deficiency volume is delivered or shipped, when the
make-up right expires or when it is determined that the counterparty's ability
to utilize the make-up right is remote. We include the impact of amounts billed
to counterparties for their deficiency obligation, net of applicable amounts
subsequently recognized into revenue, as a selected item impacting
comparability. We believe the inclusion of the contractually committed revenues
associated with that period is meaningful to investors as the related asset has
been constructed, is standing ready to provide the committed service and the
fixed operating costs are included in the current period results.
(5)Our total equity-indexed compensation expense includes expense associated
with awards that will or may be settled in PAA common units and awards that will
or may be settled in cash. The awards that will or may be settled in PAA common
units are included in PAA's diluted net income per unit calculation when the
applicable performance criteria have been met. We consider the compensation
expense associated with these awards as a selected item impacting comparability
as the dilutive impact of the outstanding awards is included in PAA's diluted
net income per unit calculation, as applicable, and the majority of the awards
are expected to be settled in PAA common units. The portion of compensation
expense associated with awards that are certain to be settled in cash is not
considered a selected item impacting comparability. See Note 18 to our
Consolidated Financial Statements for a discussion regarding our equity-indexed
compensation plans.
(6)During the periods presented, there were fluctuations in the value of the
Canadian dollar ("CAD") to the U.S. dollar ("USD"), resulting in the realization
of foreign exchange gains and losses on the settlement of foreign currency
transactions as well as the revaluation of monetary assets and liabilities
denominated in a foreign currency. These gains and losses are not integral to
our core operating performance and were thus classified as a selected item
impacting comparability. See Note 13 to our Consolidated Financial Statements
for discussion regarding our currency exchange rate risk hedging activities.
(7)Includes costs recognized during the period related to the Line 901 incident
that occurred in May 2015, net of amounts we believe are probable of recovery
from insurance. See Note 19 to our Consolidated Financial Statements for
additional information regarding the Line 901 incident.
(8)Includes acquisition-related expenses associated with the acquisition of
Felix Midstream LLC ("Felix Midstream") in February 2020. See Note 7 to our
Consolidated Financial Statements for additional information.
(9)Includes net gains recognized in connection with the repurchase of our
outstanding senior notes on the open market. See Note 11 to our Consolidated
Financial Statements for additional information.
(10)Other income/(expense), net per our Consolidated Statements of Operations,
adjusted for selected items impacting comparability ("Adjusted other
income/(expense), net") is included in Adjusted EBITDA and excluded from Segment
Adjusted EBITDA.

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  Index to Financial Statements
Analysis of Operating Segments

We manage our operations through three operating segments: Transportation, Facilities and Supply and Logistics. Our CODM (our Chief Executive Officer) evaluates segment performance based on a variety of measures including Segment Adjusted EBITDA, segment volumes, Segment Adjusted EBITDA per barrel and maintenance capital investment.



We define Segment Adjusted EBITDA as revenues and equity earnings in
unconsolidated entities less (a) purchases and related costs, (b) field
operating costs and (c) segment general and administrative expenses, plus our
proportionate share of the depreciation and amortization expense of
unconsolidated entities, and further adjusted for certain selected items
including (i) the mark-to-market of derivative instruments that are related to
underlying activities in another period (or the reversal of such adjustments
from a prior period), gains and losses on derivatives that are related to
investing activities (such as the purchase of linefill) and inventory valuation
adjustments, as applicable, (ii) long-term inventory costing adjustments, (iii)
charges for obligations that are expected to be settled with the issuance of
equity instruments, (iv) amounts related to deficiencies associated with minimum
volume commitments, net of applicable amounts subsequently recognized into
revenue and (v) other items that our CODM believes are integral to understanding
our core segment operating performance. See Note 21 to our Consolidated
Financial Statements for a reconciliation of Segment Adjusted EBITDA to Net
income/(loss) attributable to PAGP.

Our segment analysis involves an element of judgment relating to the allocations
between segments. In connection with its operations, the Supply and Logistics
segment secures transportation and facilities services from our other two
segments as well as third-party service providers under month-to-month and
multi-year arrangements. Intersegment transportation service rates are conducted
at posted tariff rates, rates similar to those charged to third parties or rates
that we believe approximate market. Facilities segment services are also
obtained at rates generally consistent with rates charged to third parties for
similar services. Intersegment activities are eliminated in consolidation and we
believe that the estimates with respect to these rates are reasonable. Also, our
segment operating and general and administrative expenses reflect direct costs
attributable to each segment; however, we also allocate certain operating
expenses and general and administrative overhead expenses between segments based
on management's assessment of the business activities for the period. The
proportional allocations by segment require judgment by management and may be
adjusted in the future based on the business activities that exist during each
period. We believe that the estimates with respect to these allocations are
reasonable.

Revenues and expenses from our Canadian based subsidiaries, which use CAD as
their functional currency, are translated at the prevailing average exchange
rates for the month.
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  Index to Financial Statements
Transportation Segment

Our Transportation segment operations generally consist of fee-based activities
associated with transporting crude oil and NGL on pipelines, gathering systems
and trucks. The Transportation segment generates revenue through a combination
of tariffs, pipeline capacity agreements and other transportation fees. Tariffs
and other fees on our pipeline systems vary by receipt point and delivery point.
The segment results generated by our tariff and other fee-related activities
depend on the volumes transported on the pipeline and the level of the tariff
and other fees charged, as well as the fixed and variable field costs of
operating the pipeline.

The following tables set forth our operating results from our Transportation
segment:

Operating Results (1)                                                         Year Ended December 31,                       Variance
(in millions, except per barrel data)                                          2020                    2019                           $                 %
Revenues                                                              $      2,020                  $ 2,320                       $  (300)              (13) %
Purchases and related costs                                                   (229)                    (244)                           15                 6  %
Field operating costs                                                         (584)                    (700)                          116                17  %
Segment general and administrative expenses (2)                                (98)                    (104)                            6                 6  %
Equity earnings in unconsolidated entities                                     350                      388                           (38)              

(10) %



Adjustments (3):
Depreciation and amortization of unconsolidated entities                        71                       61                            10              

16 % Losses from derivative activities, net of inventory valuation adjustments


     1                        -                             1              

**


Deficiencies under minimum volume commitments, net                              71                      (18)                           89              

**


Equity-indexed compensation expense                                             11                        9                             2                   **
Line 901 incident                                                                -                       10                           (10)                  **
Significant acquisition-related expenses                                         3                        -                             3              

**


Segment Adjusted EBITDA                                               $      1,616                  $ 1,722                       $  (106)               (6) %
Maintenance capital                                                   $        136                  $   161                       $   (25)              (16) %
Segment Adjusted EBITDA per barrel                                    $       0.70                  $  0.68                       $  0.02                 3  %



Average Daily Volumes                            Year Ended December 31,                   Variance
(in thousands of barrels per day) (4)           2020                   2019                      Volumes         %
Tariff activities volumes
Crude oil pipelines (by region):
Permian Basin (5)                             4,427                   4,690                         (263)       (6) %
South Texas / Eagle Ford (5)                    380                     446                          (66)      (15) %
Central (5)                                     379                     498                         (119)      (24) %
Gulf Coast                                      134                     165                          (31)      (19) %
Rocky Mountain (5)                              245                     293                          (48)      (16) %
Western                                         223                     198                           25        13  %
Canada                                          294                     323                          (29)       (9) %
Crude oil pipelines                           6,082                   6,613                         (531)       (8) %
NGL pipelines                                   184                     192                           (8)       (4) %
Tariff activities total volumes               6,266                   6,805                         (539)       (8) %
Trucking volumes                                 74                      88                          (14)      (16) %
Transportation segment total volumes          6,340                   6,893                         (553)       (8) %





**  Indicates that variance as a percentage is not meaningful.
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  Index to Financial Statements
(1)Revenues and costs and expenses include intersegment amounts.
(2)Segment general and administrative expenses reflect direct costs attributable
to each segment and an allocation of other expenses to the segments. The
proportional allocations by segment require judgment by management and are based
on the business activities that exist during each period.
(3)Represents adjustments included in the performance measure utilized by our
CODM in the evaluation of segment results. See Note 21 to our Consolidated
Financial Statements for additional discussion of such adjustments.
(4)Average daily volumes are calculated as the total volumes (attributable to
our interest) for the year divided by the number of days in the year.
(5)Region includes volumes (attributable to our interest) from pipelines owned
by unconsolidated entities.

The following is a discussion of items impacting Transportation segment operating results for the periods indicated.

Revenues, Purchases and Related Costs, Equity Earnings in Unconsolidated Entities and Volumes. The following table presents variances in revenues, purchases and related costs and equity earnings in unconsolidated entities by region:

Favorable/(Unfavorable) Variance


                                                                                    2020-2019
                                                                                    Purchases and
(in millions)                                              Revenues                 Related Costs            Equity Earnings
Crude oil pipelines
Permian Basin region                                $        (104)               $             (17)         $            31
South Texas / Eagle Ford region                               (12)                               -                      (26)
Central region                                                (33)                              (2)                     (21)

Rocky Mountain region                                          (5)                               -                      (24)

Canada region                                                 (26)                               -                        -
Other regions, NGL pipelines, trucking and
pipeline loss allowance revenue                              (120)                              34                        2
Total variance                                      $        (300)               $              15          $           (38)



•COVID-19 Impact. The destruction of demand for refined products, and therefore
crude oil, caused by COVID-19 created a supply and demand imbalance in the crude
oil markets for a portion of 2020 in all of our operating regions. This
imbalance pushed crude oil prices to historically low levels, including negative
values for at least one day in April 2020. In turn, these factors caused U.S.
and Canadian producers to respond by quickly curtailing their crude oil
production as well as their drilling and completion activities. These actions
led to a decline of onshore, lower 48 U.S. oil production by approximately 1.4
million barrels of crude oil per day between February and May of 2020, according
to the information provided by the EIA, and adversely impacted transportation
volumes on our pipelines.

•Permian Basin region. Revenues, net of purchases and related costs, ("net
revenues") decreased by $121 million for the year ended December 31, 2020
compared to the year ended December 31, 2019. This decrease was primarily due to
lower long-haul pipeline movements to Cushing, Oklahoma and Corpus Christi,
Texas due to compressed regional basis differentials, as well as lower volumes
on our intra-basin pipelines that feed our long-haul pipelines, partially offset
by increased volumes on our gathering pipelines, almost half of which was
attributable to the Felix Midstream system we acquired in February 2020. Some
shippers on the long-haul pipelines to Cushing and Corpus Christi have
under-delivered relative to their minimum volume commitments; however, the
earnings related to these volume shortfalls will not be recognized until future
periods when either the shortfall is made up or when the shipper's make-up
rights expire or it is determined that their ability to utilize the make-up
right is remote. Such deficiencies are reflected as an "Adjustment" in the table
above as discussed further below under "-Adjustments: Deficiencies under minimum
volume commitments, net."

The increase in equity earnings over the comparative period was primarily from
our 65% interest in the Cactus II pipeline, which was placed in service in
August 2019, partially offset by lower equity earnings from our 20% interest in
the BridgeTex pipeline primarily due to lower volumes.

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  Index to Financial Statements
•South Texas / Eagle Ford region. The decrease in revenues for the year ended
December 31, 2020 compared to the year ended December 31, 2019 was due to lower
volumes, primarily related to lower production.

Equity earnings from our 50% interest in the Eagle Ford pipeline decreased for
the year ended December 31, 2020 compared to the year ended December 31, 2019
due to a combination of lower joint tariff volumes from the Permian Basin via
our Cactus I pipeline, and to a lesser extent, lower regional receipts. Similar
to some shippers in the Permian Basin region, certain shippers on the Eagle Ford
pipeline have under-delivered relative to their minimum volume commitments and
the earnings related to these volume shortfalls will not be recognized until
future periods. Such deficiencies are reflected as an "Adjustment" in the table
above as discussed further below under "-Adjustments: Deficiencies under minimum
volume commitments, net."

•Central region. The decrease in net revenues for the year ended December 31,
2020 compared to the year ended December 31, 2019 was primarily due to a
decrease in crude oil production in the region. This is also a region with a
meaningful amount of excess pipeline capacity, which exacerbates the impact to
our assets in this region.

The decrease in equity earnings for the year ended December 31, 2020 compared to
the year ended December 31, 2019 was primarily due to the impact of refinery
downtime on certain of the demand pull pipelines out of Cushing, Oklahoma, in
which we own a 50% interest.

•Rocky Mountain region. Equity earnings decreased for the year ended December
31, 2020 compared to the year ended December 31, 2019 primarily due to a
combination of (i) lower crude oil volumes, partially offset by higher NGL
volumes, (ii) lower tariff rates due to the expiration of certain long-term
contracts and (iii) the sale of 25% of our interest in Saddlehorn in February
2020.

•Canada region. The decrease in revenues for the year ended December 31, 2020 compared to the year ended December 31, 2019 was primarily due to decreased crude oil production in the areas serviced by our pipelines.



•Other regions, NGL pipelines, trucking and pipeline loss allowance revenue. The
decrease in other net revenues for the year ended December 31, 2020 compared to
the year ended December 31, 2019 was primarily due to lower pipeline loss
allowance revenue due to a combination of both lower prices and volumes in 2020.
To a lesser extent, lower net revenues from our trucking activities due to less
favorable market conditions in 2020 contributed to the decrease. Additionally,
volumes in our Gulf Coast region were impacted by a decrease in throughput on a
lower tariff pipeline, which did not result in a significant impact on revenue.

Adjustments: Deficiencies under minimum volume commitments, net. Many industry
infrastructure projects developed and completed over the last several years were
underpinned by long-term minimum volume commitment contracts whereby the shipper
agreed to either: (i) ship and pay for certain stated volumes or (ii) pay the
agreed upon price for a minimum contract quantity. Some of these agreements
include make-up rights if the minimum volume is not met. If a counterparty has a
make-up right associated with a deficiency, we bill the counterparty and defer
the revenue attributable to the counterparty's make-up right but record an
adjustment to reflect such amount associated with the current period activity in
Segment Adjusted EBITDA. We subsequently recognize the revenue, and record a
corresponding reversal of the adjustment, at the earlier of when the deficiency
volume is delivered or shipped, when the make-up right expires or when it is
determined that the counterparty's ability to utilize the make-up right is
remote.

For the year ended December 31, 2020, amounts billed to counterparties exceeded
revenue recognized during the period that was previously deferred. For the year
ended December 31, 2019, the recognition of previously deferred revenue exceeded
amounts billed to counterparties associated with deficiencies under minimum
volume commitments.

Field Operating Costs. The decrease in field operating costs for the year ended
December 31, 2020 compared to the year ended December 31, 2019 was primarily due
to (i) a decrease in variable costs due to lower volumes, (ii) a decrease of
maintenance activities, primarily due to timing changes, (iii) lower
equity-based compensation costs on liability-classified awards (which are not
included as an "Adjustment" in the table above) due to a decrease in our common
unit price, (iv) reductions in compensation costs, primarily due to the benefit
of wage subsidies received by our Canadian subsidiary and (v) additional
estimated costs recognized in 2019 associated with the Line 901 incident (which
impact field operating costs but are excluded from Segment Adjusted EBITDA and
thus are reflected as an "Adjustment" in the table above). Such favorable
impacts were partially offset by higher property taxes attributable to assets
placed in service in 2020 and increased property valuations.

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  Index to Financial Statements
Segment General and Administrative Expenses. The decrease in segment general and
administrative expenses for the year ended December 31, 2020 compared to the
year ended December 31, 2019 was primarily due to (i) lower equity-based
compensation costs on liability-classified awards (which are not included as an
"Adjustment" in the table above), due to a decrease in our common unit price,
(ii) decreased travel and entertainment costs and (iii) the benefit of wage
subsidies received by our Canadian subsidiary. Such items were partially offset
by an overall increase in compensation costs related to severance costs
associated with our efforts to streamline our organization.

Maintenance Capital. Maintenance capital consists of capital expenditures for
the replacement and/or refurbishment of partially or fully depreciated assets in
order to maintain the operating and/or earnings capacity of our existing assets.
The decrease in maintenance capital for the year ended December 31, 2020
compared to the year ended December 31, 2019 was due to timing changes, the
completion of multi-year reliability improvement programs and application of
updated regulatory guidance, among other factors.

Facilities Segment



Our Facilities segment operations generally consist of fee-based activities
associated with providing storage, terminalling and throughput services
primarily for crude oil, NGL and natural gas, as well as NGL fractionation and
isomerization services and natural gas and condensate processing services. The
Facilities segment generates revenue through a combination of month-to-month and
multi-year agreements.

The following tables set forth our operating results from our Facilities segment:



Operating Results (1)                                                         Year Ended December 31,                       Variance
(in millions, except per barrel data)                                          2020                    2019                           $                 %
Revenues                                                              $      1,138                  $ 1,171                       $   (33)               (3) %
Purchases and related costs                                                    (15)                     (15)                            -                 -  %
Field operating costs                                                         (316)                    (360)                           44                12  %
Segment general and administrative expenses (2)                                (84)                     (83)                           (1)               (1) %
Equity earnings in unconsolidated entities                                       5                        -                             5              

N/A



Adjustments (3):
Depreciation and amortization of unconsolidated entities                         2                        1                             1              

**


Gains from derivative activities                                                (5)                     (13)                            8              

**


Deficiencies under minimum volume commitments, net                               2                        -                             2              

**


Equity-indexed compensation expense                                              4                        4                             -                   **

Segment Adjusted EBITDA                                               $        731                  $   705                       $    26                 4  %
Maintenance capital                                                   $         51                  $    97                       $   (46)              (47) %
Segment Adjusted EBITDA per barrel                                    $       0.49                  $  0.47                       $  0.02                 4  %



                                                              Year Ended December 31,                       Variance
Volumes (4)                                                2020                      2019                          Volumes               %
Liquids storage (average monthly capacity in
millions of barrels) (5)                                    109                        110                              (1)               (1) %
Natural gas storage (average monthly working
capacity in billions of cubic feet)                          66                         63                               3                 5  %
NGL fractionation (average volumes in thousands
of barrels per day)                                         129                        144                             (15)              (10) %
Facilities segment total volumes (average
monthly volumes in millions of barrels) (6)                 124                        125                              (1)               (1) %




** Indicates that variance as a percentage is not meaningful. (1)Revenues and costs and expenses include intersegment amounts.


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  Index to Financial Statements
(2)Segment general and administrative expenses reflect direct costs attributable
to each segment and an allocation of other expenses to the segments. The
proportional allocations by segment require judgment by management and are based
on the business activities that exist during each period.
(3)Represents adjustments included in the performance measure utilized by our
CODM in the evaluation of segment results. See Note 21 to our Consolidated
Financial Statements for additional discussion of such adjustments.
(4)Average monthly volumes are calculated as total volumes for the year divided
by the number of months in the year.
(5)Includes volumes (attributable to our interest) from facilities owned by
unconsolidated entities.
(6)Facilities segment total volumes are calculated as the sum of: (i) liquids
storage capacity; (ii) natural gas storage working capacity divided by 6 to
account for the 6:1 mcf of natural gas to crude Btu equivalent ratio and further
divided by 1,000 to convert to monthly volumes in millions; and (iii) NGL
fractionation volumes multiplied by the number of days in the year and divided
by the number of months in the year.

The following is a discussion of items impacting Facilities segment operating results.

Revenues, Purchases and Related Costs and Volumes. Variances in revenues, purchases and related costs, and average monthly volumes were primarily driven by the following:



•Rail Terminals. Revenues from our rail terminals decreased by $33 million for
the year ended December 31, 2020 compared to the year ended December 31, 2019,
primarily due to decreased activity at certain of our rail terminals resulting
from less favorable market conditions, as well as lower volumes due to voluntary
shut-ins and curtailments of crude oil production by producers.

•NGL Operations. Revenues from our NGL operations decreased by $21 million for
the year ended December 31, 2020 compared to the year ended December 31, 2019,
primarily due to the sale of certain NGL terminals in the fourth quarter of 2019
and the second quarter of 2020, net unfavorable foreign exchange impacts of
approximately $4 million and lower revenues from our NGL processing facilities.
Such unfavorable impacts were partially offset by the favorable impact of the
receipt of a deficiency payment in 2020 of approximately $20 million upon the
expiration of a multi-year contract.

•Natural Gas and Condensate Processing. Net revenues from our U.S. natural gas
and condensate processing operations decreased by $11 million for the year ended
December 31, 2020 compared to the year ended December 31, 2019 primarily due to
the unfavorable impact of a $5 million payment to resolve a contractual dispute
as well as a decrease in condensate processing volumes and rates.

•Crude Oil Storage. Revenues from our crude oil storage operations increased by
$33 million for the year ended December 31, 2020 compared to the year ended
December 31, 2019, primarily due to the addition of an aggregate of
approximately 3 million barrels of storage capacity at our Cushing, Oklahoma,
St. James, Louisiana and Midland, Texas terminals and increased activity at
certain of our Mid-Continent terminals. Additionally, the unfavorable impact on
revenues from the sale of our Los Angeles Basin terminals in October 2020 was
largely offset by increased spot activity at certain of these terminals during
the first three quarters of 2020.

The increase in equity earnings over the comparative period was from our 50%
interest in Eagle Ford Terminals, which owns a crude oil storage facility in
Corpus Christi, Texas that was placed in service in September of 2019.

Field Operating Costs. The decrease in field operating costs for the year ended
December 31, 2020 compared to the year ended December 31, 2019 was primarily due
to (i) lower maintenance activities due to timing changes, (ii) reduced activity
at our rail terminals and the divestiture of certain NGL terminals, (iii)
reductions in compensation costs including the benefit of wage subsidies
received by our Canadian subsidiary and (iv) lower property taxes. Such
favorable impacts were partially offset by lower mark-to-market gains in the
current period on fuel hedges (which impacts field operating costs but are
excluded from Segment Adjusted EBITDA and thus are reflected as an "Adjustment"
in the table above).

Maintenance Capital. The decrease in maintenance capital spending for the year
ended December 31, 2020 compared to the year ended December 31, 2019 was
primarily due to timing changes, the impact of asset sales, the completion of
multi-year reliability improvement programs and application of updated
regulatory guidance, among other factors.

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  Index to Financial Statements
Supply and Logistics Segment

Revenues from our Supply and Logistics segment activities reflect the sale of
gathered and bulk-purchased crude oil, as well as sales of NGL volumes.
Generally, our segment results are impacted by (i) increases or decreases in our
Supply and Logistics segment volumes (which consist of lease gathering crude oil
purchases volumes and NGL sales volumes), (ii) the overall strength, weakness
and volatility of market conditions, including regional differentials, and (iii)
the effects of competition on our lease gathering and NGL margins. In addition,
the execution of our risk management strategies in conjunction with our assets
can provide upside in certain markets.

The following tables set forth our operating results from our Supply and Logistics segment:



Operating Results (1)                                                          Year Ended December 31,                        Variance
(in millions, except per barrel data)                                           2020                   2019                            $                  %
Revenues                                                               $      22,059                $ 32,276                      $ (10,217)              (32) %
Purchases and related costs                                                  (22,099)                (31,276)                         9,177                29  %
Field operating costs                                                           (191)                   (258)                            67                26  %
Segment general and administrative expenses (2)                                  (89)                   (110)                            21            

19 %

Adjustments (3): Losses from derivative activities net of inventory valuation adjustments


     484                     173                            311            

**


Long-term inventory costing adjustments                                           44                     (20)                            64            

**


Deficiencies under minimum volume commitments, net                                 1                       -                              1             

**


Equity-indexed compensation expense                                                4                       4                              -             

**


Net (gain)/loss on foreign currency revaluation                                   (3)                     14                            (17)           

**


Segment Adjusted EBITDA                                                $         210                $    803                      $    (593)              (74) %
Maintenance capital                                                    $          29                $     29                      $       -                 -  %
Segment Adjusted EBITDA per barrel                                     $        0.43                $   1.61                      $   (1.18)              (73) %



Average Daily Volumes (4)                                                        Year Ended December 31,                       Variance
(in thousands of barrels per day)                                             2020                      2019                          Volume            

%


Crude oil lease gathering purchases                                          1,174                      1,162                             12                 1  %
NGL sales                                                                      144                        207                            (63)              (30) %
Supply and Logistics segment total volumes                                   1,318                      1,369                            (51)               (4) %





**  Indicates that variance as a percentage is not meaningful.
(1)Revenues and costs include intersegment amounts.
(2)Segment general and administrative expenses reflect direct costs attributable
to each segment and an allocation of other expenses to the segments. The
proportional allocations by segment require judgment by management and are based
on the business activities that exist during each period.
(3)Represents adjustments included in the performance measure utilized by our
CODM in the evaluation of segment results. See Note 21 to our Consolidated
Financial Statements for additional discussion of such adjustments.
(4)Average daily volumes are calculated as the total volumes for the period
divided by the number of days in the period.

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Index to Financial Statements The following table presents the range of the NYMEX West Texas Intermediate ("WTI") benchmark price of crude oil (in dollars per barrel):



                                                   NYMEX WTI
                                                Crude Oil Price
During the Year Ended December 31,               Low            High
2020                                      $     (38)           $ 63
2019                                      $      46            $ 66



Our crude oil and NGL supply, logistics and distribution operations are not
directly affected by the absolute level of prices. Because the commodities that
we buy and sell are generally indexed to the same pricing indices for both sales
and purchases, revenues and costs related to purchases will fluctuate with
market prices. However, the margins related to those sales and purchases will
not necessarily have a corresponding increase or decrease. Additionally, net
revenues are impacted by net gains and losses from certain derivative activities
during the periods.

Our NGL operations are sensitive to weather-related demand, particularly during
the approximate five-month peak heating season of November through March, and
temperature differences from period-to-period may have a significant effect on
NGL demand and thus our financial performance.

Segment Adjusted EBITDA and Volumes. The following summarizes the significant items impacting our Supply and Logistics Segment Adjusted EBITDA:



•Crude Oil Operations. Net revenues from our crude oil operations decreased for
year ended December 31, 2020 compared to the year ended December 31, 2019,
primarily due to a combination of (i) less favorable crude oil differentials,
particularly the differential between the value of crude oil in the Permian
Basin compared to the Gulf Coast market and (ii) the impact of lower volumes in
higher margin areas, partially offset by volume increases in lower margin areas.
Such unfavorable impacts were partially offset by the favorable impact of
contango market conditions during the last three quarters of 2020.

•NGL Operations. Net revenues from our NGL operations decreased for the year
ended December 31, 2020 compared to the year ended December 31, 2019, primarily
due to (i) warmer weather during the fourth quarter of 2020, (ii) weaker
fractionation spreads between the price of natural gas and the extracted NGL,
(iii) lower border flows through our straddle plants and (iv) the absence of the
favorable impact from certain non-recurring items recorded in the second quarter
of 2019.

•Impact from Certain Derivative Activities, Net of Inventory Valuation
Adjustments. The impact from certain derivative activities on our net revenues
includes mark-to-market and other gains and losses resulting from certain
derivative instruments that are related to underlying activities in another
period (or the reversal of mark-to-market gains and losses from a prior period),
losses on derivatives that are related to investing activities (such as the
purchase of linefill) and inventory valuation adjustments, as applicable. See
Note 13 to our Consolidated Financial Statements for a comprehensive discussion
regarding our derivatives and risk management activities. These gains and losses
impact our net revenues but are excluded from Segment Adjusted EBITDA and thus
are reflected as an "Adjustment" in the table above.

•Long-Term Inventory Costing Adjustments. Our net revenues are impacted by
changes in the weighted average cost of our crude oil and NGL inventory pools
that result from price movements during the periods. These costing adjustments
related to long-term inventory necessary to meet our minimum inventory
requirements in third-party assets and other working inventory that was needed
for our commercial operations. We consider this inventory necessary to conduct
our operations and we intend to carry this inventory for the foreseeable future.
These costing adjustments impact our net revenues but are excluded from Segment
Adjusted EBITDA and thus are reflected as an "Adjustment" in the table above.

•Foreign Exchange Impacts. Our net revenues are impacted by fluctuations in the
value of CAD to USD, resulting in foreign exchange gains and losses on U.S.
denominated net assets within our Canadian operations. These non-cash gains and
losses impact our net revenues but are excluded from Segment Adjusted EBITDA and
thus are reflected as an "Adjustment" in the table above.

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•Field Operating Costs. The decrease in field operating costs for the year ended
December 31, 2020 compared to the year ended December 31, 2019 was primarily
driven by a decrease in long-haul third-party trucking costs and a decrease in
company personnel and truck costs as more of our supply was connected to
pipelines and taken off trucks.

•Segment General and Administrative Expenses. The decrease in segment general
and administrative expenses for the year ended December 31, 2020 compared to the
year ended December 31, 2019 was primarily driven by (i) lower compensation
costs including the benefit of wage subsidies received by our Canadian
subsidiary, (ii) decreased travel and entertainment costs, (iii) a decrease in
equity-based compensation costs on liability-classified awards (which are not
included as an "Adjustment" in the table above) due to a decrease in our common
unit price and (iv) general cost reductions associated with exiting low margin,
high administrative cost businesses.

Other Income and Expenses

Depreciation and Amortization



Depreciation and amortization expense increased for the year ended December 31,
2020 compared to the year ended December 31, 2019 largely driven by additional
depreciation expense associated with acquired assets, the completion of various
investment capital projects and a reduction in the useful lives of certain
assets.

Gains/Losses on Asset Sales and Asset Impairments, Net



The net loss on asset sales and asset impairments for the year ended December
31, 2020 included (i) non-cash impairment losses on held and used assets of
approximately $541 million related to the write-down of (a) certain pipeline and
other long-lived assets due to the current macroeconomic and geopolitical
conditions including the collapse of oil prices driven by both the decrease in
demand caused by the COVID-19 pandemic and excess supply, as well as changing
market conditions and expected lower crude oil production in certain regions,
and (b) idled or underutilized assets for which is it has been determined that
it is unlikely that opportunities will exist in the future to recover our
investment in these assets and (ii) net losses of approximately $178 million
related to the sale of assets, including non-cash impairments recognized upon
classification to assets held for sale.

The net loss on asset sales and asset impairments for the year ended December
31, 2019 was largely driven by a loss on the sale of a storage terminal in North
Dakota. See Note 6 and Note 7 to our Consolidated Financial Statements for
additional information regarding these asset impairments.

Goodwill Impairment Losses



During the first quarter of 2020, we recognized a goodwill impairment charge of
$2.5 billion, representing the entire balance of goodwill. See Note 8 to our
Consolidated Financial Statements for additional information.

Gain on/(Impairment of) Investments in Unconsolidated Entities, Net



During the year ended December 31, 2020, we recognized losses of $202 million
related to the write-down of certain of our investments in unconsolidated
entities. Additionally, we recognized a gain of $21 million related to our sale
of a 10% interest in Saddlehorn Pipeline Company, LLC.

During the year ended December 31, 2019, we recognized a non-cash gain of $269
million related to a fair value adjustment resulting from the accounting for the
contribution of our undivided joint interest in the Capline pipeline system for
an equity interest in Capline Pipeline Company LLC. See Note 9 to our
Consolidated Financial Statements for additional information regarding our
unconsolidated entities.
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Interest Expense

Interest expense is primarily impacted by:



•our weighted average debt balances;
•the level and maturity of fixed rate debt and interest rates associated
therewith;
•market interest rates and our interest rate hedging activities; and
•interest capitalized on capital projects.

The following table summarizes the components impacting the interest expense variance (in millions, except percentages):


                                                                                   Average               Weighted Average
                                                                                    LIBOR                Interest Rate (1)
Interest expense for the year ended December 31, 2019           $  425                 2.2  %                            4.4  %
Impact of lower capitalized interest                                10

Impact of borrowings under credit facilities and PAA commercial paper program

                                             3
Impact of issuance and retirement of PAA senior notes               (4)
Other                                                                2
Interest expense for the year ended December 31, 2020           $  436                 0.5  %                            4.1  %




(1)Excludes commitment and other fees.



Interest expense increased for the year ended December 31, 2020 compared to the
year ended December 31, 2019 primarily due to (i) a higher weighted average debt
balance during 2020 driven by higher commercial paper and credit facility
borrowings and (ii) lower capitalized interest in the 2020 period resulting from
fewer capital projects under construction, partially offset by (iii) the impact
from lower weighted average rates.

See Note 11 to our Consolidated Financial Statements for additional information regarding our debt activities during the periods presented.

Other Income, Net



The following table summarizes the components impacting Other income/(expense),
net (in millions):

                                                                                 Year Ended December 31,
                                                                               2020                          2019

Gain related to mark-to-market adjustment of our Preferred Distribution Rate Reset Option (1)

                                $           20                        $          2
Net gain on foreign currency revaluation (2)                                  13                                  15
Other                                                                          6                                   7
                                                                  $           39                        $         24





(1)See Note 13 to our Consolidated Financial Statements for additional
information.
(2)The activity during 2020 was primarily related to the impact from the change
in the USD to CAD exchange rate on the portion of our intercompany net
investment that is not long-term in nature.

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Income Tax (Expense)/Benefit

The decrease in current income tax expense for the year ended December 31, 2020
compared to the year ended December 31, 2019 was primarily due to lower taxable
earnings from our Canadian operations. The increase in the deferred income tax
benefit for the year ended December 31, 2020 compared to the year ended December
31, 2019 was primarily due to (i) the impact of lower earnings at PAA on income
attributable to PAGP and (ii) lower year-over-year income as impacted by
fluctuations in the derivative mark-to-market valuations in our Canadian
operations, partially offset by the recognition of a deferred tax benefit of
approximately $60 million during the second quarter of 2019 as a result of the
reduction of the provincial tax rate in Alberta, Canada.

Liquidity and Capital Resources

General



Our primary sources of liquidity are (i) cash flow from operating activities
(ii) borrowings under PAA's credit facilities or commercial paper program and
(iii) funds received from sales of equity and debt securities. In addition, we
may supplement these sources of liquidity with proceeds from our divestiture
program. Our primary cash requirements include, but are not limited to,
(i) ordinary course of business uses, such as the payment of amounts related to
the purchase of crude oil, NGL and other products, other expenses and interest
payments on outstanding debt, (ii) investment and maintenance capital
activities, (iii) acquisitions of assets or businesses, (iv) repayment of
principal on long-term debt and (v) distributions to our Class A shareholders
and noncontrolling interests. In addition, we may use cash for repurchases of
common equity. We generally expect to fund our short-term cash requirements
through cash flow generated from operating activities and/or borrowings under
PAA's commercial paper program or credit facilities. In addition, we generally
expect to fund our long-term needs, such as those resulting from investment
capital activities or acquisitions and refinancing long-term debt, through a
variety of sources (either separately or in combination), which may include the
sources mentioned above as funding for short-term needs and/or the issuance of
additional equity or debt securities and the sale of assets.

As of December 31, 2020, although we had a working capital deficit of $587
million, we had approximately $2.2 billion of liquidity available to meet our
ongoing operating, investing and financing needs, subject to continued covenant
compliance, as noted below (in millions):
                                                                            

As of


                                                                               December 31, 2020
Availability under PAA senior unsecured revolving credit facility (1) (2)    $            1,507

Availability under PAA senior secured hedged inventory facility (1) (2)

               1,197
Amounts outstanding under PAA commercial paper program                                     (547)
Subtotal                                                                                  2,157
Cash and cash equivalents                                                                    25
Total                                                                        $            2,182





(1)Represents availability prior to giving effect to borrowings outstanding
under the PAA commercial paper program, which reduce available capacity under
the facilities.
(2)Available capacity under the PAA senior unsecured revolving credit facility
and the PAA senior secured hedged inventory facility was reduced by outstanding
letters of credit of $93 million and $36 million, respectively.
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Usage of PAA's credit facilities, which provide the financial backstop for PAA's
commercial paper program, is subject to ongoing compliance with covenants, as
discussed further below. PAA's borrowing capacity and borrowing costs are also
impacted by its credit rating. See Item 1A. "Risk Factors-Risks Related to PAA's
Business-Loss of PAA's investment grade credit rating or the ability to receive
open credit could negatively affect its borrowing costs, ability to purchase
crude oil, NGL and natural gas supplies or to capitalize on market
opportunities."

Current macroeconomic and geopolitical conditions including the collapse of oil
prices driven by both the decrease in demand caused by the COVID-19 pandemic and
excess supply has caused liquidity issues impacting many energy companies;
however, we believe that we have, and will continue to have, the ability to
access PAA's commercial paper program and credit facilities, which we use to
meet our short-term cash needs. We believe that our financial position remains
strong and we have sufficient liquid assets, cash flow from operating activities
and borrowing capacity under PAA's credit agreements to meet our financial
commitments, debt service obligations, contingencies and anticipated capital
expenditures; however, extended disruptions in the financial markets and/or
energy price volatility that adversely affect our business may have a materially
adverse effect on our financial condition, results of operations or cash flows.
See Item 1A. "Risk Factors" for further discussion regarding risks that may
impact our liquidity and capital resources.

Credit Agreements, Commercial Paper Program and Indentures



PAA has three primary credit arrangements, which we use to meet our short-term
cash needs. These include PAA's $1.6 billion senior unsecured revolving credit
facility maturing in 2024, $1.4 billion senior secured hedged inventory facility
maturing in 2022 (excluding aggregate commitments of $45 million, which mature
in 2021) and $3.0 billion unsecured commercial paper program that is backstopped
by PAA's revolving credit facility and its hedged inventory facility.
Additionally, PAA has two $100 million term loans. The credit agreements for
PAA's revolving credit facilities (which impact PAA's ability to access its
commercial paper program because they provide the financial backstop that
supports PAA's short-term credit ratings) and PAA's term loans and the
indentures governing its senior notes contain cross-default provisions. A
default under PAA's credit agreements or indentures would permit the lenders to
accelerate the maturity of the outstanding debt. As long as PAA is in compliance
with the provisions in its credit agreements, its ability to make distributions
of available cash is not restricted. PAA was in compliance with the covenants
contained in its credit agreements and indentures as of December 31, 2020.

Cash Flow from Operating Activities



The primary drivers of cash flow from operating activities are (i) the
collection of amounts related to the sale of crude oil, NGL and other products,
the transportation of crude oil and other products for a fee, and the provision
of storage and terminalling services for a fee and (ii) the payment of amounts
related to the purchase of crude oil, NGL and other products and other expenses,
principally field operating costs, general and administrative expenses and
interest expense.

Cash flow from operating activities can be materially impacted by the storage of
crude oil in periods of a contango market, when the price of crude oil for
future deliveries is higher than current prices. In the month we pay for the
stored crude oil, we borrow under the PAA credit facilities or commercial paper
program (or use cash on hand) to pay for the crude oil, which negatively impacts
operating cash flow. Conversely, cash flow from operating activities increases
during the period in which we collect the cash from the sale of the stored crude
oil. Similarly, the level of NGL and other product inventory stored and held for
resale at period end affects our cash flow from operating activities.

In periods when the market is not in contango, we typically sell our crude oil
during the same month in which we purchase it and we do not rely on borrowings
under the PAA credit facilities or commercial paper program to pay for the crude
oil. During such market conditions, our accounts payable and accounts receivable
generally move in tandem as we make payments and receive payments for the
purchase and sale of crude oil in the same month, which is the month following
such activity. In periods during which we build inventory, regardless of market
structure, we may rely on the PAA credit facilities or commercial paper program
to pay for the inventory. In addition, we use derivative instruments to manage
the risks associated with the purchase and sale of our commodities. Therefore,
our cash flow from operating activities may be impacted by the margin deposit
requirements related to our derivative activities. See Note 13 to our
Consolidated Financial Statements for a discussion regarding our derivatives and
risk management activities.

Net cash provided by operating activities for the years ended December 31, 2020,
2019 and 2018 was approximately $1.5 billion, $2.5 billion and $2.6 billion,
respectively, and primarily resulted from earnings from our operations.
Additionally, as discussed further below, changes during these periods in our
inventory levels and associated margin balances required as part of our hedging
activities impacted our cash flow from operating activities.
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During 2020, we increased the volume of both our crude oil inventory to be
stored during the contango market and our NGL inventory in anticipation of the
2020-2021 heating season as well as the margin balances required as part of our
hedging activities, all of which was funded by short-term debt. The cash
outflows associated with these activities were partially offset by lower prices
for inventory purchased and stored at the end of the current period compared to
the end of 2019. Cash provided by operating activities was favorably impacted by
cash received for transactions for which the revenue has been deferred pending
the completion of future performance obligations. See Note 3 to our Consolidated
Financial Statements for additional information.

During 2019, our cash provided by operating activities was positively impacted
by the proceeds from the sale of NGL and crude oil inventory that we held and
also by the lower weighted average price of NGL inventory compared to prior year
amounts.

During 2018, our cash provided by operating activities was favorably impacted by
approximately $250 million of cash received for transactions for which the
revenue has been deferred pending the completion of future performance
obligations. The favorable impact was partially offset by an increase in the
volume of crude oil inventory that we held, which was funded from earnings from
our operations and proceeds from asset sales.

Investing Activities



In addition to our operating needs discussed above, we also use cash for our
investment capital projects, maintenance capital activities and acquisition
activities. Historically, we have financed these expenditures primarily with
cash generated by operating activities discussed in "-Cash Flow from Operating
Activities" above and the financing activities discussed in "-Financing
Activities" below. In recent years, we have also used proceeds from our
divestiture program, as discussed further below. We have made and will continue
to make capital expenditures for investment capital projects, maintenance
activities and acquisitions. However, in the near term, we do not plan to issue
common equity to fund such activities.

Capital Expenditures

The following table summarizes our expenditures for acquisition capital, investment capital and maintenance capital (in millions):



                                        Year Ended December 31,
                                    2020          2019         2018
Investment capital (1) (2) (3)   $     921      $ 1,340      $ 1,888
Maintenance capital (1)                216          287          252
Acquisition capital (4)                310           50            -
                                 $   1,447      $ 1,677      $ 2,140





(1)Capital expenditures made to expand the existing operating and/or earnings
capacity of our assets are classified as "Investment capital." Capital
expenditures for the replacement and/or refurbishment of partially or fully
depreciated assets in order to maintain the operating and/or earnings capacity
of our existing assets are classified as "Maintenance capital."
(2)"Investment capital" was previously termed "expansion capital." We consider
the term "investment capital" to be more descriptive.
(3)Includes contributions to unconsolidated entities, accounted for under the
equity method of accounting, related to investment capital projects by such
entities.
(4)Acquisition capital for 2020 primarily includes a crude oil gathering system
located in the Delaware Basin.

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Investment Capital Projects

Our investment capital programs consist of investments in midstream
infrastructure projects that build upon our core assets and operations. For the
years presented, substantially all of the investment capital was invested in our
fee-based Transportation and Facilities segments. The majority of this
investment capital consists of highly-contracted projects that complement our
broader system capabilities and support the long-term needs of the upstream and
downstream sectors of the industry value chain. The following table summarizes
our investment in capital projects (in millions):

                                                              Year Ended December 31,
Projects                                                  2020           2019         2018
Permian Basin Takeaway Pipeline Projects (1) (2)      $   292          $   440      $   880
Complementary Permian Basin Projects (1)                  200              503          671
Long-Haul Pipeline Projects (Non-Permian) (1)             195               98           20
Selected Facilities/Downstream Projects (3)               115               93           62
Other Projects                                            119              206          255
Total                                                 $   921          $ 1,340      $ 1,888





(1)These projects will continue into 2021. See "-2021 Investment Capital
Projects below."
(2)Represents pipeline projects with takeaway capacity out of the Permian Basin,
including (i) our 16% interest in Wink to Webster Pipeline and (ii) our 65%
interest in the Cactus II Pipeline.
(3)Includes projects at our St. James and Cushing terminals.

2021 Investment Capital Projects. In April 2020, in response to the current
dynamic and uncertain market conditions, we announced our plan to significantly
reduce and continue to challenge our capital program. The majority of our 2021
investment capital program will be invested in our fee-based Transportation and
Facilities segments. We expect that our investments will have minimal
contributions to our 2021 results, but will provide growth for 2022 and beyond.
Our 2021 capital program includes the following projects as of February 2021
with the estimated cost for the entire year (in millions):

Projects                                         2021

Permian Basin Takeaway Pipeline Projects $ 140 Long-Haul Pipeline Projects (Non-Permian) 115 Complementary Permian Basin Projects

               85
Selected Facilities/Downstream Projects            50
Other Projects                                     35

Total Projected 2021 Investment Capital $ 425

Divestitures

We continue to evaluate potential sales of non-core assets and/or sales of partial interests in assets to strategic joint venture partners. The following table summarizes the proceeds received for sales of such assets, which were previously reported in our Transportation and Facilities segments:



                                            Year Ended December 31,
                                          2020           2019        2018
Proceeds from divestitures (1)      $    451            $ 205      $ 1,334





(1)Includes proceeds from (i) a multi-year supply agreement related to the sale
of certain NGL terminals in April 2020 and (ii) our formation of Red River
Pipeline Company LLC in May 2019. See Note 7 and Note 12 to our Consolidated
Financial Statements for additional information.

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Proceeds from asset sales were used to fund our investment capital projects and
reduce debt levels. See Note 7 to our Consolidated Financial Statements for
additional detail regarding our divestiture transactions.

Ongoing Activities Related to Strategic Transactions



We are continuously engaged in the evaluation of potential transactions that
support our current business strategy. While in the past such transactions have
included acquisitions and large capital projects, consistent with our current
strategic focus on capital discipline, leverage reduction, portfolio
optimization and free cash flow generation, we are currently primarily focused
on evaluating whether we should (i) sell assets that we regard as non-core or
that we believe might be a better fit with the business and/or assets of a
third-party buyer or (ii) sell partial interests in assets to strategic joint
venture partners, in each case to optimize our asset portfolio and strengthen
our balance sheet and leverage metrics. With respect to a potential divestiture,
we may also conduct an auction process or may negotiate a transaction with one
or a limited number of potential buyers. Such transactions could involve assets
that, if sold or put into a joint venture or joint ownership arrangement, could
have a material effect on our financial condition and results of operations.

We typically do not announce a transaction until after we have executed a
definitive agreement. However, in certain cases in order to protect our business
interests or for other reasons, we may defer public announcement of a
transaction until closing or a later date. Past experience has demonstrated that
discussions and negotiations regarding a potential transaction can advance or
terminate in a short period of time. Moreover, the closing of any transaction
for which we have entered into a definitive agreement may be subject to
customary and other closing conditions, which may not ultimately be satisfied or
waived. Accordingly, we can give no assurance that our current or future efforts
with respect to any such transactions will be successful, and we can provide no
assurance that our financial expectations with respect to such transactions will
ultimately be realized. See Item 1A. "Risk Factors-Risks Related to PAA's
Business-Divestitures, joint ventures, joint ownership arrangements and
acquisitions involve risks that may adversely affect PAA's business."

Financing Activities



Our financing activities primarily relate to funding investment capital
projects, acquisitions and refinancing of debt maturities, as well as short-term
working capital (including borrowings for NYMEX and ICE margin deposits) and
hedged inventory borrowings related to our NGL business and contango market
activities.

Borrowings and Repayments Under Credit Arrangements

During the year ended December 31, 2020, we had net borrowings under the PAA credit facilities and commercial paper program of $296 million. The net borrowings resulted primarily from borrowings during the period related to funding needs for inventory purchases and general partnership purposes.

During the year ended December 31, 2019, we had net borrowings under the PAA credit facilities and commercial paper program of $418 million. The net borrowings resulted primarily from borrowings during the period related to funding needs for general partnership purposes.



During the year ended December 31, 2018, we had net repayments on the PAA credit
facilities and commercial paper program of $901 million. The net repayments
resulted primarily from cash flow from operating activities and proceeds from
asset sales, which offset borrowings during the period related to funding needs
for capital investments, inventory purchases and other general partnership
purposes.

In August 2018, PAA entered into an agreement for two $100 million term loans
from the remarketing of its two $100 million bonds. The purchasers of the two
term loans have the right to put, at par, the term loans in July 2023. The bonds
mature by their terms in May 2032 and August 2035, respectively. See Note 11 to
our Consolidated Financial Statements for additional information.
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Senior Notes

Issuances of PAA Senior Notes. During 2020 and 2019, PAA issued senior unsecured notes as summarized in the table below (in millions):



                                                                                                                  Gross                  Net
Year                         Description                           Maturity               Face Value           Proceeds(1)           Proceeds(2)
                 3.80% Senior Notes issued at 99.794%                                   $       750
2020                        of face value                       September 2030                               $        748          $        742    (3)

                 3.55% Senior Notes issued at 99.801%                                   $     1,000
2019                        of face value                       December 2029                                $        998          $        989    (4)





(1)Face value of notes less the applicable premium or discount (before deducting
for initial purchaser discounts, commissions and offering expenses).
(2)Face value of notes less the applicable premium or discount, initial
purchaser discounts, commissions and offering expenses.
(3)PAA used the net proceeds from the offering to repay the principal amounts of
its 5.00% senior notes due February 2021.
(4)PAA used the net proceeds from the offering to partially repay the principal
amounts of its 2.60% senior notes due December 2019 and 5.75% senior notes due
January 2020 and for general partnership purposes.

Repayments of PAA Senior Notes. During 2020 and 2019, PAA repaid the following senior unsecured notes in full (in millions):



 Year                          Description                          

Repayment Date

2020 $600 million 5.00% Senior Notes due February 2021 November 2020 (1)

2019 $500 million 2.60% Senior Notes due December 2019 November 2019 (2)

2019 $500 million 5.75% Senior Notes due January 2020 December 2019 (2)

(1)PAA repaid these senior notes with proceeds from its 3.80% senior notes issued in June 2020 and cash on hand. (2)PAA repaid these senior notes with proceeds from its 3.55% senior notes issued in September 2019 and cash on hand.

Additionally, during the year ended December 31, 2020, PAA repurchased $17 million of its outstanding senior notes on the open market and recognized a gain of $3 million on these transactions.

Registration Statements



PAGP Registration Statements. We have filed with the SEC a shelf registration
statement that, subject to effectiveness at the time of use, allows us to issue
up to an aggregate of $939 million of equity securities ("PAGP Traditional
Shelf"). At December 31, 2020, we had approximately $939 million of unsold
securities available under the PAGP Traditional Shelf. We also have access to a
universal shelf registration statement ("PAGP WKSI Shelf"), which provides us
with the ability to offer and sell an unlimited amount of equity securities,
subject to market conditions and its capital needs. We did not conduct any
offerings under the PAGP Traditional Shelf or PAGP WKSI Shelf during the years
ended December 31, 2020, 2019 or 2018.

PAA Registration Statements.  PAA periodically accesses the capital markets for
both equity and debt financing. PAA has filed with the SEC a universal shelf
registration statement that, subject to effectiveness at the time of use, allows
PAA to issue up to an aggregate of $1.1 billion of debt or equity securities
("PAA Traditional Shelf"). PAA did not conduct any offerings under the PAA
Traditional Shelf during the years ended December 31, 2020, 2019 or 2018. At
December 31, 2020, PAA had approximately $1.1 billion of unsold securities
available under the PAA Traditional Shelf. PAA also has access to a universal
shelf registration statement ("PAA WKSI Shelf"), which provides it with the
ability to offer and sell an unlimited
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amount of debt and equity securities, subject to market conditions and capital
needs. The offering of PAA's $750 million, 3.80% senior notes in June 2020 was
conducted under the PAA WKSI Shelf.

Common Equity Repurchase Program



In November 2020, the board of directors of our general partner approved a $500
million common equity repurchase program (the "Program") to be utilized as an
additional method of returning capital to investors. The Program authorizes the
repurchase from time to time of up to $500 million of PAA's common units and/or
our Class A shares via open market purchases or negotiated transactions
conducted in accordance with applicable regulatory requirements. Ultimately, the
amount, timing and pace of potential repurchase activity will be determined by a
number of factors, including market conditions, PAA's financial performance and
flexibility, PAA's actual and expected Free Cash Flow after distributions, the
absolute and relative equity prices of PAA's common units and our Class A
shares, and the extent to which PAA is positioned to achieve and maintain its
targeted leverage ratio. No time limit has been set for completion of the
Program, and the Program may be suspended or discontinued at any time. The
Program does not obligate PAA or us to acquire a particular number of common
units or Class A shares. Any PAA common units or Class A shares that are
repurchased will be canceled.

PAA repurchased 6.2 million common units under the Program through open market
purchases that settled during the year ended December 31, 2020. The total
purchase price of these repurchases was $50 million, including commissions and
fees. The remaining available capacity under the Program as of December 31, 2020
was $450 million. Additionally, PAA repurchased 350,000 common units under the
Program for $3 million through open market purchases at the end of December 2020
that settled in January 2021.

Distributions to Our Class A Shareholders



We distribute 100% of our available cash to our Class A shareholders of record
within 55 days following the end of each quarter. Available cash is generally
defined as all of our cash and cash equivalents on hand at the end of each
quarter less reserves established in the discretion of our general partner for
future requirements. Our levels of financial reserves are established by our
general partner and include reserves for the proper conduct of our business
(including future capital expenditures and anticipated credit needs), compliance
with law or contractual obligations and funding of future distributions to our
shareholders. See Item 5. "Market for Registrant's Shares, Related Shareholder
Matters and Issuer Purchases of Equity Securities-Cash Distribution Policy" for
additional discussion regarding available cash and distributions.

In response to the challenging near-term market conditions, we took steps to
further strengthen our balance sheet, liquidity and long-term financial
flexibility. In this regard, beginning with the May 2020 distribution, PAA's
distribution per common unit and our distribution per Class A share were reduced
by 50% versus the distributions paid in February 2020, which reflects a
reduction of $525 million on an annualized basis. See "-Executive Summary-Recent
Events and Outlook" for further discussion.

On February 12, 2021, we paid a quarterly distribution of $0.18 per Class A share ($0.72 per Class A share on an annualized basis). See Note 12 to our Consolidated Financial Statements for details of distributions paid during the three years ended December 31, 2020.

Distributions to Noncontrolling Interests



Distributions to noncontrolling interests represent amounts paid on interests in
consolidated entities that are not owned by us. As of December 31, 2020,
noncontrolling interests in our subsidiaries consisted of (i) limited partner
interests in PAA including a 69% interest in PAA's common units and PAA's Series
A preferred units combined and 100% of PAA's Series B preferred units, (ii) an
approximate 21% limited partner interest in AAP and (iii) a 33% interest in Red
River Pipeline Company LLC.

Distributions to PAA's Series A preferred unitholders. Holders of PAA's Series A
preferred units are entitled to receive quarterly distributions, subject to
customary anti-dilution adjustments, of $0.525 per unit ($2.10 per unit
annualized). Subject to certain limitations, following January 28, 2021, the
holders of PAA's Series A preferred units may make a one-time election to reset
the distribution rate. See Note 12 to our Consolidated Financial Statements for
additional information.

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Distributions to PAA's Series B preferred unitholders. Holders of PAA's Series B
preferred units are entitled to receive, when, as and if declared by PAA's
general partner out of legally available funds for such purpose, cumulative cash
distributions, as applicable. Through and including November 15, 2022, holders
are entitled to a distribution equal to $61.25 per unit per year, payable
semiannually in arrears on the 15th day of May and November. See Note 12 to our
Consolidated Financial Statements for further discussion of PAA's Series B
preferred units, including distribution rates and payment dates after November
15, 2022.

Distributions to PAA's common unitholders. On February 12, 2021, PAA paid a quarterly distribution of $0.18 per common unit ($0.72 per common unit on an annualized basis). See Note 12 to our Consolidated Financial Statements for details of distributions paid during the three years ended December 31, 2020.

Contingencies

For a discussion of contingencies that may impact us, see Note 19 to our Consolidated Financial Statements.

Commitments



Contractual Obligations.  In the ordinary course of doing business, we purchase
crude oil and NGL from third parties under contracts, the majority of which
range in term from thirty-day evergreen to five years, with a limited number of
contracts with remaining terms extending up to 14 years. We establish a margin
for these purchases by entering into various types of physical and financial
sale and exchange transactions through which we seek to maintain a position that
is substantially balanced between purchases on the one hand and sales and future
delivery obligations on the other. The table below includes purchase obligations
related to these activities. Where applicable, the amounts presented represent
the net obligations associated with our counterparties (including giving effect
to netting buy/sell contracts and those subject to a net settlement
arrangement). We do not expect to use a significant amount of internal capital
to meet these obligations, as the obligations will be funded by corresponding
sales to entities that we deem creditworthy or who have provided credit support
we consider adequate.

The following table includes our best estimate of the amount and timing of these payments as well as other amounts due under the specified contractual obligations as of December 31, 2020 (in millions):



                                      2021              2022              2023              2024              2025            Thereafter            Total
Long-term debt and related
interest payments (1)              $    406          $  1,183          $  1,662          $  1,083          $ 1,300          $     8,337          $ 13,971
Leases (2)                              108               100                77                63               49                  304               701
Other obligations (3)                   542               368               325               281              254                  934             2,704
Subtotal                              1,056             1,651             2,064             1,427            1,603                9,575            17,376
Crude oil, NGL and other
purchases (4)                        11,565            10,353             9,643             9,035            7,507               26,845            74,948
Total                              $ 12,621          $ 12,004          $ 11,707          $ 10,462          $ 9,110          $    36,420          $ 92,324





(1)Includes debt service payments, interest payments due on PAA's senior notes
and the commitment fee on assumed available capacity under the PAA credit
facilities, as well as long-term borrowings under PAA's credit agreements and
commercial paper program, if any. Although there may be short-term borrowings
under PAA's credit agreements and commercial paper program, we historically
repay and borrow at varying amounts. As such, we have included only the maximum
commitment fee (as if no short-term borrowings were outstanding on PAA's credit
agreements or commercial paper program) in the amounts above. For additional
information regarding our debt obligations, see Note 11 to our Consolidated
Financial Statements.
(2)Includes both operating and finance leases as defined by FASB guidance.
Leases are primarily for (i) railcars, (ii) land, (iii) office space, (iv)
storage tanks, (v) tractor trailers and (vi) vehicles. See Note 14 to our
Consolidated Financial Statements for additional information.
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(3)Includes (i) other long-term liabilities, (ii) storage, processing and
transportation agreements (including certain agreements for which the amount and
timing of expected payments is subject to the completion of underlying
construction projects), (iii) certain rights-of-way easements and (iv)
noncancelable commitments related to our investment capital projects, including
projected contributions for our share of the capital spending of our equity
method investments. The storage, processing and transportation agreements
include approximately $2.0 billion associated with agreements to store crude oil
at facilities and transport crude oil on pipelines owned by equity method
investees at posted tariff rates or prices that we believe approximate market. A
portion of our commitment to transport is supported by crude oil buy/sell or
other agreements with third parties with commensurate quantities.
(4)Amounts are primarily based on estimated volumes and market prices based on
average activity during December 2020. The actual physical volume purchased and
actual settlement prices will vary from the assumptions used in the table.
Uncertainties involved in these estimates include levels of production at the
wellhead, weather conditions, changes in market prices and other conditions
beyond our control.

Letters of Credit.  In connection with supply and logistics activities, we
provide certain suppliers with irrevocable standby letters of credit to secure
our obligation for the purchase and transportation of crude oil, NGL and natural
gas. Our liabilities with respect to these purchase obligations are recorded in
accounts payable on our balance sheet in the month the product is purchased.
Generally, these letters of credit are issued for periods of up to seventy days
and are terminated upon completion of each transaction. Additionally, we issue
letters of credit to support insurance programs, derivative transactions,
including hedging-related margin obligations, and construction activities. At
December 31, 2020 and 2019, we had outstanding letters of credit of
approximately $129 million and $157 million, respectively.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements as defined by Item 303 of Regulation S-K.

Investments in Unconsolidated Entities



We have invested in entities that are not consolidated in our financial
statements. Certain of these entities are borrowers under credit facilities. We
are neither a co-borrower nor a guarantor under any facilities of such entities.
We may elect at any time to make additional capital contributions to any of
these entities. The following table sets forth selected information regarding
these entities as of December 31, 2020 (unaudited, dollars in millions):

                                                                                                                  Total Cash
                                                                               Our               Total               and               Total
                                                                            Ownership            Entity           Restricted           Entity
Entity                                     Type of Operation                 Interest            Assets              Cash               Debt
BridgeTex Pipeline Company,
LLC                                        Crude Oil Pipeline                  20%             $   856          $        35          $      -
Cactus II Pipeline LLC                   Crude Oil Pipeline (1)                65%             $ 1,167          $        44          $      -
Capline Pipeline Company LLC               Crude Oil Pipeline                  54%             $ 1,217          $        16          $      -
Diamond Pipeline LLC                     Crude Oil Pipeline (1)                50%             $   951          $         8          $      -
Eagle Ford Pipeline LLC                  Crude Oil Pipeline (1)                50%             $   808          $        33          $      -
Eagle Ford Terminals Corpus           Crude Oil Terminal and Dock
Christi LLC                                       (1)                          50%             $   220          $         4          $      -
Red Oak Pipeline LLC                       Crude Oil Pipeline                  50%             $   205          $         -          $      -
Saddlehorn Pipeline Company,
LLC                                        Crude Oil Pipeline                  30%             $   662          $        40          $      -
STACK Pipeline LLC                       Crude Oil Pipeline (1)                50%             $   146          $         1          $      -
White Cliffs Pipeline, LLC                 Crude Oil Pipeline                  36%             $   518          $        24          $      -
Wink to Webster Pipeline LLC               Crude Oil Pipeline                  16%             $ 2,068          $        68          $      -
Other investments                                                                              $   531          $        49          $      3

(1)We serve as operator of the asset.


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