PLAINS RESOURCES INC
S-3/A, 2000-06-23
PETROLEUM & PETROLEUM PRODUCTS (NO BULK STATIONS)
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<PAGE>


As filed with the Securities and Exchange Commission on June 23, 2000
                                                 Registration No. 333-33804
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   ________


                          AMENDMENT NO. 1 TO FORM S-3
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                   ________

                             PLAINS RESOURCES INC.
            (Exact name of registrant as specified in its charter)

                 Delaware                                13-2898764
     (State or other jurisdiction of        (I.R.S. Employer Identification No.)
      incorporation or organization)


                             500 Dallas, Suite 700
                             Houston, Texas 77002
                                (713) 654-1414
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                                _______________

                                   Tim Moore
                      Vice President and General Counsel
                             Plains Resources Inc.
                             500 Dallas, Suite 700
                             Houston, Texas 77002
                                (713) 654-1414

(Name, address, including zip code, and telephone number, including area code,
of agent for service)

                                _______________

                                   Copy to:
                                John A. Watson
                          Fulbright & Jaworski L.L.P.
                           1301 McKinney, Suite 5100
                           Houston, Texas 77010-3095
                                (713) 651-5151

                                _______________

     Approximate date of commencement of proposed sale to the public: As soon as
practicable after the effective date of this Registration Statement.

     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [_]

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

     If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statements for the same offering. [_]

     If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]

     If delivery of this prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]


The Registrant hereby amends this Registration Statement on such date or dates
as may be necessary to delay its effective date until the Registrant shall file
a further amendment which specifically states that this Registration Statement
shall thereafter become effective in accordance with Section 8(a) of the
Securities Act of 1933 or until this Registration Statement shall become
effective on such date as the Securities and Exchange Commission, acting
pursuant to said Section 8(a), may determine.
================================================================================
<PAGE>


                   Subject to Completion, Dated June 23, 2000

PROSPECTUS

                          [LOGO OF PLAINS RESOURCES]

                                  Common Stock


                                5,469,777 Shares

                                _______________

     This prospectus relates to the offer and sale of up to 5,469,777 shares of
Plains Resources Inc. common stock by some of our stockholders.  See "Selling
Stockholders".  These shares of common stock are not currently outstanding, but
may be issued in the future upon conversion of our Series F preferred stock by
the selling stockholders. We will not receive any proceeds from any of these
sales.

     Our common stock is traded on the American Stock Exchange under the symbol
"PLX." The closing price on June 21, 2000, as reflected on the American Stock
Exchange, was $16 3/16 per share. Our principal executive offices are located at
500 Dallas, Suite 700, Houston, Texas 77002, and our telephone number is (713)
654-1414.

                                ________________

    For information concerning those risks that you bear in purchasing the
    common stock sold in this offering see "Risk Factors" beginning on page
                                    3.
                                _________________


          Neither the Securities and Exchange Commission nor any state
          securities commission has approved or disapproved these
          securities or determined if this prospectus is truthful or
          complete. Any representation to the contrary is a criminal
          offense.

                                ________________

June 23, 2000
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                         <C>
Risk Factors.........................................................         3

About Plains Resources Inc...........................................         6

Forward-Looking Statements and Associated Risks......................        11

Selling Stockholders.................................................        12

Plan of Distribution.................................................        14

Where You Can Find More Information..................................        16

Legal Matters........................................................        16

Experts..............................................................        17

Reserve Engineers....................................................        17
</TABLE>

                                       2
<PAGE>


                                  RISK FACTORS

     You should carefully consider the following risk factors, together with
other information contained or incorporated by reference in this prospectus, in
evaluating whether to invest in our shares.

     We recently suffered a large loss from unauthorized crude oil trading by a
     former employee.  A loss of this kind could occur again in the future in
     spite of our best efforts to prevent it.

     Generally, it is our policy that as Plains All American purchases crude
oil, it establishes a margin by selling crude oil for physical delivery to
third-party users, such as independent refiners or major oil companies, or by
entering into a future delivery obligation under futures contracts on the NYMEX.
Through these transactions, we seek to maintain a position that is substantially
balanced between purchases, on the one hand, and sales or future delivery
obligations, on the other hand. Our policy is not to acquire and hold crude oil,
futures contracts or derivative products for the purpose of speculating on price
changes. As discussed more fully under "We Recently Experienced a Large
Unauthorized Crude Oil Trading Loss" at page 10, we discovered in November 1999
that this policy was violated by one of our former employees, which resulted in
losses of approximately $174 million, including estimated associated costs and
legal expenses.  We have taken steps within our organization to enhance our
processes and procedures to prevent future unauthorized trading.  We cannot
assure you, however, that these steps will detect and prevent all violations of
our trading policies and procedures, particularly if deception or other
intentional misconduct is involved.

     Our trading loss resulted in the termination of some of our crude oil
     purchase contracts. We also are incurring additional expense for letters of
     credit to support our trading operations.

     In the period immediately following the disclosure of the unauthorized
trading losses, a significant number of Plains All American's suppliers and
trading partners reduced or eliminated the open credit previously extended to
Plains All American. Consequently, the amount of letters of credit Plains All
American needed to support the level of its crude oil purchases then in effect
increased significantly. Some of Plains All American's purchase contracts were
terminated. As a result of these changes, aggregate volumes purchased have
declined from an average of 528,000 barrels per day for the fiscal quarter
preceding the trading loss to an average of 286,000 barrels per day in the first
quarter of 2000. Approximately 90,000 barrels per day of the decrease is related
to barrels gathered at producer lease locations and 152,000 barrels per day is
attributable to bulk purchases. As a result of the increase in letter of credit
costs and reduced volumes, annual Adjusted EBITDA for the year 2000 is expected
to be adversely affected by approximately $5.0 million, excluding the positive
impact of current favorable market conditions. EBITDA means earnings before
interest expense, income taxes, depreciation, depletion and amortization.
Adjusted EBITDA means earnings before interest, income taxes, depreciation,
depletion, amortization, unauthorized trading losses, noncash compensation
expense, restructuring expense, gain on unit offerings, linefill gain and
extraordinary loss from extinguishment of debt.

     Some of our operations are in densely populated areas. This increases our
     risk of damages in the event of a catastrophic accident. We are not fully
     insured against all risks.

     Our operations are subject to all of the risks normally incident to the
exploration for and the production of crude oil and natural gas, including
blowouts, cratering, oil spills and fires, each of which could result in damage
to or destruction of crude oil and natural gas wells, production facilities or
other property, or injury to persons.  Our operations in California, including
transportation of crude oil by pipelines within the city of Los Angeles, are
especially susceptible to damage from earthquakes and involve increased risks of
personal injury, property damage and marketing interruptions because of the
population density of the area. Although we maintain insurance coverage
considered to be customary in the industry, we are not fully insured against
some risks, including earthquake risk in

                                       3
<PAGE>


California, either because insurance is not available or because of high premium
costs. The occurrence of a significant event that is not fully insured against
could have a material adverse effect on our financial position.

      Our insurance does not cover every potential risk associated with
operating our pipelines, including the potential loss of significant revenues.
Consistent with insurance coverage generally available to the industry, our
insurance policies provide limited coverage for losses or liabilities relating
to pollution, with broader coverage for sudden and accidental occurrences.  A
pipeline may experience damage as a result of an accident or other natural
disaster. These hazards can cause personal injury and loss of life, severe
damage to and destruction of property and equipment, pollution or environmental
damages and suspension of operations.

     A significant portion of Plains All American's gross margin is derived from
     two offshore California oil fields. Production from these fields is
     declining.

     A significant portion of the gross margin of Plains All American is derived
from the Santa Ynez and Point Arguello fields located offshore California. For
the year ended December 31, 1999, gross revenues less fuel and power expenses
were $30.6 million from Santa Ynez and $10.6 million from Point Arguello.
Plains All American has entered into contracts with the producers of most of the
production from these fields under which they have agreed to ship all of their
production from these fields on the All American Pipeline through August 2007.
The contracts do not require the producers to ship any minimum volumes.  Average
daily volumes received from the Santa Ynez and Point Arguello fields have
declined from 92,000 and 60,000 barrels, respectively, in 1995 to 54,000 and
16,000 barrels, respectively, for the first quarter of 2000. We expect that
there will continue to be natural production declines from each of these fields
as the underlying reservoirs are depleted. As operator of the Point Arguello
field, we are currently conducting additional drilling and other activities in
this field.  We cannot assure you that these activities will affect the natural
decline in production.  In addition, if production is disrupted in these fields
because of production problems, transportation problems or other reasons, then
it would have a material adverse effect on our midstream business.

     Our hedging arrangements for our crude oil production could reduce the
     price we would receive in the absence of those arrangements.

     To manage our exposure to commodity price risk, we routinely enter into
hedging arrangements under which we hedge a portion of our crude-oil production.
See "Upstream:  Crude Oil and Natural Gas Production" at page 7.  Our hedging
arrangements provide us protection on the hedged volumes if crude oil prices
decline below the prices at which these hedges are set.  But ceiling prices in
our hedges may cause us to receive less revenue on the hedged volumes than we
would receive in the absence of hedges.  At December 31, 1999, and March 31,
2000, the total market value of our crude oil subject to hedges exceeded the
amounts we will receive under our hedged prices by approximately $19 million and
$26 million, respectively.

     For 2000, we have entered into various arrangements under which we will
receive an average minimum crude oil price of approximately $16.00 per barrel on
18,500 barrels per day, which is equivalent to 83% of first quarter 2000 crude
oil production levels. Approximately 10,000 barrels per day of the volumes that
we have hedged in 2000 will participate in price increases above the $16.00
floor price, subject to a ceiling limitation of approximately $19.75 per barrel.
For 2001, we have entered into various arrangements under we will receive an
average minimum NYMEX price of approximately $19.00 per barrel on 12,000 barrels
per day, which is equivalent to 54% of first quarter 2000 crude oil production
levels. Of these volumes, 100% have full market price participation up to $27.00
per barrel, 50% have price participation between $27.00 per barrel and $30.00
per barrel and 100% have full market price participation at prices above $30.00
per barrel.  The oil prices referred to are before adjustment for quality and
location differentials. Because of the quality and location of our crude oil
production, these adjustments will reduce our net price per barrel.

                                       4
<PAGE>


     The quantity of proved reserves we report is especially sensitive to
     decreases in crude oil prices.

     Because reservoirs deplete over time and a substantial portion of
production costs are fixed, a point is reached when additional reserves from a
reservoir are no longer economically recoverable. Our reserves are mainly crude
oil and are characterized by a long recovery time relative to U.S. industry
averages. As a result, changes in the prices we receive for our production will
affect our total economically recoverable reserve volumes more than if our crude
oil reserves were expected to be recovered at a faster rate. Historically, the
prices for oil and natural gas have been volatile and are likely to continue to
be volatile in the future. The prices that we receive for our oil and natural
gas production and the levels of our production are subject to wide fluctuations
and depend on numerous factors that we do not control. Decreases in the prices
of oil and natural gas have had, and could have in the future, an adverse effect
on the carrying value of our proved reserves and our revenues, profitability and
cash flow.

     We could suffer losses if we inaccurately forecast our available supplies
     of crude oil.

     A substantial portion of our crude oil production is committed for future
delivery. Any event that disrupts our anticipated physical supplies of crude oil
may expose us to risk of loss resulting from price changes. For example, if we
inaccurately forecast the shut-in of production or other supply interruptions as
the result of depressed oil prices, mechanical interruptions, abrupt production
declines or apportionment of pipeline space on common-carrier pipelines, we may
be unable to meet our supply commitments.  We could be required to make
purchases elsewhere to meet our commitments, and if prices change adversely, our
margins may be adversely affected.

                                       5
<PAGE>

                          ABOUT PLAINS RESOURCES INC.

                             What Is Our Business?

     We are an independent energy company engaged in two related lines of
business.  Our first line of business, which we refer to as "upstream",
acquires, exploits, develops, explores and produces crude oil and natural gas.
Our second line of business, which we refer to as "midstream", engages in the
marketing, transportation and terminalling of crude oil.  Terminals are
facilities where crude oil is transferred to or from storage or a transportation
system, such as a pipeline, to another transportation system, such as trucks or
another pipeline.  The operation of these facilities is called "terminalling".
We conduct this second line of business through our majority ownership in Plains
All American Pipeline, L.P.

     One of our wholly owned subsidiaries, Plains All American Inc., is both the
general partner and majority owner of Plains All American. Because it holds the
general partner interest and owns approximately 18.2 million common and
subordinated units, Plains All American Inc. holds an approximate 54% interest
in Plains All American.  For financial statement purposes, the assets,
liabilities and earnings of Plains All American are included in our consolidated
financial statements, with the public unitholders' interest reflected as a
minority interest. The following chart sets forth the organization relationship
of the subsidiaries in our two lines of business:


                            [ORGANIZATIONAL CHART]




                Upstream:  Crude Oil and Natural Gas Production

     We own several crude oil and natural gas properties, and we continually
seek to acquire additional crude oil and natural gas properties that fit within
our business strategy.  We specialize in acquiring and then effectively
exploiting and developing crude oil and natural gas properties that we believe
have not been exploited and developed to their full potential.  Generally, our
business strategy begins with the acquisition of crude oil or natural gas
properties that have produced significant volumes since initial discovery and
that have significant estimated reserves in place.  These properties are usually
owned by major integrated or large independent oil and natural gas

                                       6
<PAGE>


companies. After acquiring these properties, we seek to increase the efficiency
of existing wells by improving production and recovery techniques and by
reducing production expenses. We may also drill additional development wells.
Our management believes that it has developed a proven record in increasing cash
flow by acquiring and exploiting these types of properties. Our crude oil and
natural gas producing properties are mainly located in California in the Los
Angeles Basin, the Arroyo Grande Field and the Mt. Poso Field; offshore
California in the Point Arguello Field; the Sunniland Trend of South Florida;
and the Illinois Basin in southern Illinois. In addition, we commit a minor
portion of our capital to pursue higher-risk exploration opportunities that
offer potentially higher rewards in areas that complement our core business
strategy discussed above. We take advantage of the marketing expertise that
Plains All American has developed through our marketing agreement with Plains
All American under which Plains All American is the exclusive purchaser/marketer
of all our equity crude oil production.

     During the five-year period ended December 31, 1999, we incurred total
costs of approximately $436.6 million in acquiring, exploiting, developing and
exploring crude oil properties.  We spent approximately 97% of this capital in
acquisition, exploitation and development activities, and we spent approximately
3% on our exploration activities.  By implementing our business strategy, during
that period we added to our crude oil and natural gas reserves approximately
204.9 million barrels of oil equivalent, at a cost of $2.13 per barrels of oil
equivalent, including revisions of estimates but excluding production.

     To manage our exposure to commodity price risk, we routinely hedge a
portion of our crude oil production.  For 2000, we have entered into various
arrangements under which we will receive an average minimum crude oil price of
approximately $16.00 per barrel on 18,500 barrels per day, which is equivalent
to 83% of first quarter 2000 crude oil production levels. Approximately 10,000
barrels per day of the volumes that we have hedged in 2000 will participate in
price increases above the $16.00 floor price, subject to a ceiling limitation of
approximately $19.75 per barrel. For 2001, we have entered into various
arrangements under we will receive an average minimum NYMEX price of
approximately $19.00 per barrel on 12,000 barrels per day, which is equivalent
to 54% of first quarter 2000 crude oil production levels. Of these volumes, 100%
have full market price participation up to $27.00 per barrel, 50% have price
participation between $27.00 per barrel and $30.00 per barrel and 100% have full
market price participation at prices above $30.00 per barrel.  The oil prices
referred to are before adjustment for quality and location differentials.
Because of the quality and location of our crude oil production, these
adjustments will reduce our net price per barrel.

     Our management intends to continue to maintain hedging arrangements for a
significant portion of our production.  Our hedging arrangements provide us
protection on the hedged volumes if crude oil prices decline below the prices at
which these hedges are set.  But ceiling prices in our hedges may cause us to
receive less revenue on the hedged volumes than we would receive in the absence
of hedges.  At December 31, 1999, and March 31, 2000, the total market value of
our crude oil subject to hedges exceeded the amounts we will receive under our
hedged prices by approximately $19.0 million and $26.0 million, respectively.
See "Our hedging arrangements for our crude oil production could reduce the
price we would receive in the absence of those arrangements" at page 5.

       Midstream:  Crude Oil Marketing, Transportation and Terminalling

     Our second line of business consists of:

          .    gathering crude oil from the fields where the crude oil is
               produced;
          .    interstate and intrastate transportation of crude oil through
               pipelines, trucks or barges;
          .    storing crude oil in our storage tanks;
          .    transferring crude oil from pipelines and storage tanks to
               trucks, barges or other pipelines through our terminals;
          .    marketing crude oil produced by Plains Resources;

                                       7
<PAGE>


          .    the purchase of crude oil at the well and the bulk purchase of
               crude oil at pipeline and terminal facilities; and
          .    the subsequent resale or exchange of crude oil at various points
               along the crude oil distribution chain.

     We conduct these businesses through Plains All American, which was formed
in 1998 to acquire and operate the business and assets of our subsidiaries in
this business segment. In 1999, Plains All American grew through acquisitions
and internal development to become one of the largest transporters, terminal
operators, gatherers and marketers of crude oil in the United States.  During
the first quarter of 2000, Plains All American handled an average of
approximately 580,000 barrels of crude oil per day. This segment of our business
conducts its operations primarily in California, Texas, Oklahoma, Louisiana and
the Gulf of Mexico.

     The principal assets used in this segment include:

          .    a 3.1 million barrel, above-ground crude oil storage and terminal
               facility at Cushing, Oklahoma;
          .    the segment of the All American Pipeline that extends
               approximately 140 miles from Las Flores, California to Emidio,
               California;
          .    the San Joaquin Valley Gathering System in California;
          .    the West Texas Gathering System, the Spraberry Pipeline System,
               and the East Texas Pipeline System, which are all located in
               Texas;
          .    the Sabine Pass Pipeline System in southwest Louisiana and
               southeast Texas;
          .    the Ferriday Pipeline System in eastern Louisiana and western
               Mississippi;
          .    the Illinois Basin Pipeline System in southern Illinois; and
          .    approximately 280 trucks, 325 tractor-trailers and 290 injection
               stations, which are owned or leased and used in our gathering and
               marketing activities.

     Plains All American's Cushing facility is a state-of-the-art, 3.1 million
barrel, above-ground crude oil storage and terminalling facility.  Cushing,
Oklahoma is the largest crude oil trading hub in the United States and the
designated delivery point for NYMEX crude oil futures contracts. We also have an
additional 6.6 million barrels of storage and terminalling capacity in our other
facilities, including tankage associated with our pipeline and gathering
systems. Our storage and terminal operations increase our margins in our
business of purchasing and selling crude oil and also generate revenue through a
combination of storage and throughput charges to third parties.

     We Recently Sold a Segment of the All American Pipeline.

     In March 2000, we sold to a unit of El Paso Energy Corporation for $129.0
million the segment of the All American Pipeline that extends from Emidio,
California to McCamey, Texas. Except for minor third-party volumes, one of our
subsidiaries, Plains Marketing, L.P., has been the sole shipper on this segment
of the pipeline since its predecessor acquired the line from the Goodyear Tire &
Rubber Company in July 1998. We realized net proceeds of approximately $124.0
million after associated transaction costs and estimated costs to remove some
equipment. We used the proceeds from the sale to reduce the outstanding debt of
Plains All American.  We recognized a gain of approximately $20.1 million in
connection with this sale. During 1999, we reported gross margin of
approximately $5.0 million from volumes transported on the segment of the line
that was sold.

     We had suspended shipments of crude oil on this segment of the pipeline in
November, 1999. At that time, we owned approximately 5.2 million barrels of
crude oil in the segment of the pipeline. We sold this crude oil from November,
1999 to February, 2000 for net proceeds of approximately $100 million, which we
used for working capital purposes.  We recognized a total gain of approximately
$44.6 million in connection with the sale of the crude oil.

                                       8
<PAGE>

      We Recently Experienced a Large Unauthorized Crude Oil Trading Loss

     In November 1999, we discovered that a former employee of Plains All
American had engaged in unauthorized trading activity, resulting in a loss of
approximately $174.0 million, which includes estimated associated costs and
legal expenses.  A full investigation into the unauthorized trading activities
by outside legal counsel and independent accountants and consultants determined
that the vast majority of the losses occurred from March through November 1999,
and the impact warranted a restatement of previously reported financial
information for 1999 and 1998. Because the financial statements of Plains All
American are consolidated with our financial statements, adverse effects on the
financial statements of Plains All American directly affect our consolidated
financial statements. As a result, we have restated our previously reported 1999
and 1998 results to reflect the losses incurred from these unauthorized trading
activities.

     Normally, as Plains All American purchases crude oil, it establishes a
margin by selling crude oil for physical delivery to third-party users or by
entering into a future delivery obligation with respect to futures contracts.
The employee in question violated Plains All American's policy of maintaining a
position that is substantially balanced between crude oil purchases and sales or
future delivery obligations. The unauthorized trading and associated losses
resulted in a default of certain covenants under Plains All American's then-
existing credit facilities and significant short-term cash and letter of credit
requirements.  In December 1999, Plains All American executed amended credit
facilities and obtained default waivers from all of its lenders.  Plains All
American paid approximately $13.7 million to its lenders in connection with the
amended credit facilities.  In connection with the amendments, we loaned
approximately $114.0 million to Plains All American.  We financed the $114.0
million that we loaned Plains All American with:

          .    the issuance of a new series of our Series F preferred stock for
               proceeds of $50.0 million;
          .    cash distributions of approximately $9.0 million made in November
               1999 to Plains All American's general partner; and
          .    $55.0 million of borrowings under our revolving credit facility.

     On May 8, 2000, Plains All American entered into new bank credit agreements
to refinance Plains All American's existing bank debt and repay the $114.0
million owed to us.  The new bank credit agreements also provide Plains All
American with additional flexibility for working capital, capital expenditures
and other general corporate purposes. At closing, Plains All American had $256.0
million outstanding under a $400 million senior secured revolving credit
facility.  Plains All American also had at closing letters of credit of
approximately $173.8 million and borrowings of approximately $20.3 million
outstanding under a separate $300 million senior secured letter of credit and
borrowing facility.  Please see "Management's Discussion and Analysis-Liquidity
and Capital Resources-Credit Facilities" in our Annual Report on Form 10-K/A
filed _____, 2000 for additional information about the terms of these new credit
facilities.

     As a result of Plains All American's trading loss, some of our suppliers
and trading partners reduced or eliminated Plains All American's open credit.
This increases our costs of maintaining letters of credit to support the level
of crude oil purchases. In addition, some of Plains All American's purchase
contracts were terminated. As a result of these changes, Plains All American's
annual Adjusted EBITDA is expected to be adversely affected by approximately
$5.0 million, excluding the positive affect of current favorable market
conditions.  See "Our trading loss resulted in the termination of some of our
crude oil purchase contracts.  We also are incurring additional expense for
letters of credit to support our trading operations," at page 4.

     We have taken appropriate and aggressive steps within our organization to
enhance our processes and procedures to prevent future unauthorized trading. One
of such steps includes the creation of a new professional risk management
position. This risk manager has direct responsibility and authority for our
trading controls and procedures and other aspects of corporate risk management.
But we cannot assure you that such steps will detect and prevent all violations
of our trading policies and procedures, particularly if deception or other
intentional

                                       9
<PAGE>


misconduct is involved.

     Texas Securities Litigation.

     On November 29, 1999, a class action lawsuit was filed in the United States
District Court for the Southern District of Texas entitled Di Giacomo v. Plains
All American Pipeline, L.P., et al.  The suit alleged that Plains All American
Pipeline, L.P. and certain of the general partner's officers and directors
violated federal securities laws, primarily in connection with unauthorized
trading by a former employee. An additional nineteen cases were filed in the
Southern District of Texas, some of which name the general partner and us as
additional defendants. Plaintiffs allege that the defendants are liable for
securities fraud violations under Rule 10b-5 and Section 20(a) of the Securities
Exchange Act of 1934 and for making false registration statements under Sections
11 and 15 of the Securities Act of 1933. The court has consolidated all
subsequently filed cases under the first filed action described above and has
appointed two lead plaintiffs representing two different plaintiff classes: (1)
purchasers of our common stock and options and (2) purchasers of Plains All
American's common units. No answer or responsive motion on behalf of the
defendants is due until forty-five days after consolidated amended complaints
are filed, which are expected in July, 2000.

     The plaintiffs in the Texas securities litigation seek, among other things,
damages for all losses and damages allegedly sustained by the plaintiffs from
the unauthorized trading loss and defendants' alleged misconduct, and any
additional relief as may be just and proper under the circumstances.

     Delaware Derivative Litigation.

     On December 3, 1999, two derivative lawsuits were filed in the Delaware
Chancery Court, New Castle County, entitled Susser v. Plains All American Inc.,
et al and Senderowitz v. Plains All American Inc., et al. These suits, and three
others which were filed in Delaware subsequently, named the general partner, its
directors and certain of its officers as defendants, and allege that the
defendants breached the fiduciary duties that they owed to Plains All American
Pipeline, L.P. and its unitholders by failing to monitor properly the activities
of its employees. The derivative complaints allege, among other things, that
Plains All American Pipeline, L.P. has been harmed due to the negligence or
breach of loyalty of the officers and directors that are named in the lawsuits.
The court has consolidated all of the cases under the caption In Re Plains All
American Inc. Shareholders Litigation, and has designated the complaint filed in
Susser v. Plains All American Inc. as the complaint in the consolidated action.
No responsive pleading or motion on behalf of the defendants is currently due.

     The plaintiffs in the Delaware securities litigation seek that the
defendants
          .    account for all losses and damages allegedly sustained by Plains
               All American from the unauthorized trading losses;
          .    establish and maintain effective internal controls ensuring that
               our affiliates and persons responsible for our affairs do not
               engage in wrongful practices detrimental to Plains All American;
          .    account for the plaintiffs' costs and expenses in the litigation,
               including reasonable attorneys' fees, accountants' fees, and
               experts' fees; and
          .    provide the plaintiffs any additional relief as may be just and
               proper under the circumstances.

     We intend to vigorously defend the claims made in the Texas securities
litigation and the Delaware derivative litigation. However, there can be no
assurance that we will be successful in our defense or that these lawsuits will
not have a material adverse effect on our financial position or results of
operation.

     We, in the ordinary course of business, are a claimant and/or a defendant
in various other legal proceedings in which our exposure, individually and in
the aggregate, is not considered material.

                                      10
<PAGE>

                FORWARD-LOOKING STATEMENTS AND ASSOCIATED RISKS

     All statements, other than statements of historical fact, included in this
prospectus and the documents we have incorporated by reference into this
prospectus are forward-looking statements.  These include statements identified
by the words "anticipate," "believe," "estimate," "expect," "plan," "intend" and
"forecast" and similar expressions and statements regarding our business
strategy, plans and objectives of our management for future operations.  These
statements reflect our current views with respect to future events, based on
what we believe are reasonable assumptions.  These statements, however, are
subject to certain risks, uncertainties and assumptions, including, but not
limited to:

          .    the availability of adequate supplies of and demand for crude oil
               in the areas in which we operate;
          .    the impact of crude oil price fluctuations;
          .    the effects of competition;
          .    the success of our risk management activities;
          .    the availability (or lack thereof) of acquisition or combination
               opportunities;
          .    the impact of current and future laws and governmental
               regulations;

          .    environmental liabilities that are not covered by an indemnity or
               insurance; and
          .    general economic, market or business conditions.

     If one or more of these risks or uncertainties materialize, or if
underlying assumptions prove incorrect, actual results may vary materially from
the results anticipated in the forward-looking statements.  Except as required
by applicable securities laws, we do not intend to update these forward-looking
statements and information.

                                      11
<PAGE>

                             SELLING STOCKHOLDERS

     The selling stockholders are the holders of our Series F preferred stock.
The selling stockholders include transferees, donees, pledgees or other
successors selling shares received from a selling stockholder named below after
the date of this prospectus.  The selling stockholders bought 50,000 shares of
our Series F preferred stock in December 1999.  The selling stockholders may
acquire more shares of our Series F preferred stock if we choose to pay future
dividends as additional shares of preferred stock.

     The selling stockholders may acquire the common stock offered by this
prospectus if they convert their Series F preferred stock into common stock.  As
of June 23, 2000, each share of Series F preferred stock is convertible into the
number of shares of common stock that equals $1,000 divided by $12.25, or 81.63.
The shares of Series F preferred stock were sold for $1,000 per share, and
$12.25 is a negotiated conversion rate that represented an approximate 2%
premium over the trading price of our common stock at the time of the sale of
the Series F preferred stock.  This formula can be adjusted if we divide or
consolidate our common stock, sell our common stock for a price less than $12.25
or take other actions that affect the value of our common stock.  As of June 23,
2000, if the selling stockholders converted all of their shares of Series F
preferred stock into common stock, they would own approximately 4,081,633 shares
of our common stock, which represents 22.7% of our common stock currently
outstanding.  Any additional shares of Series F preferred stock that they
receive as dividends, as discussed more fully below, may also be converted into
common stock.

     Pursuant to the Certificate of Designation for the Series F preferred
stock, we must declare a dividend on the Series F preferred stock twice a year.
We have the right under the Certificate of Designation for the Series F
preferred stock, instead of paying the dividend in cash or other property, to
pay the divided in additional shares of Series F preferred stock.  But we can
only pay these dividends in shares of Series F preferred stock six times.  If we
pay these dividends in shares of Series F preferred stock all or some of the
times that we are allowed to do so, then the selling stockholders will receive
more shares of Series F preferred stock, and thus would receive additional
shares of common stock upon conversion of the Series F preferred stock.  We do
not know how many times we will pay the divided in shares of Series F preferred
stock.  As shown in the table below, we have included in the shares covered by
this offering the maximum number of shares that the selling stockholders may
receive upon conversion of Series F preferred stock assuming we pay five
dividends in additional shares of Series F preferred stock.

     The selling stockholders may also acquire the common stock offered by this
prospectus if we exchange shares of our common stock for the Series F preferred
stock. We have the right to exchange shares of our common stock for the Series F
preferred stock if, after December 15, 2001, the fair market value of our common
stock is at least $21.60 for any 60 consecutive business days.  If we elect to
exercise this right to exchange, then holders of Series F preferred stock will
receive the same number of shares of common stock as they would receive if they
convert their shares of Series F preferred stock as discussed above.

     We have the option to redeem the preferred stock after December 15, 2003.
The redemption price is initially $1,100 per share, and declines over time. On
December 15, 2007 we must redeem each outstanding share of Series F preferred
stock for $1,000 per share.

     The following table sets forth the name of each selling stockholder, the
number of shares of common stock beneficially owned by each selling stockholder
as of June 23, 2000, and the number of shares of common stock that may be
offered by each selling stockholder pursuant to this prospectus.  Under many of
the headings in the table below, we have created two columns, which are designed
to reflect the impact that the payment of dividends in shares of Series F
preferred stock may have on the number of shares of common stock sold in this
offering.  The selling stockholders may receive up to 17,005 shares of Series F
preferred stock from future dividends, which, as of June 23, 2000, would be
convertible into 1,388,163 shares of common stock.  Any of the shares listed
below under the heading "Shares to be offered pursuant to this prospectus" may
be offered for sale by a selling stockholder from

                                      12
<PAGE>

time to time. The table also sets forth any position, office or any other
material relationship that any selling stockholder has had with us within the
past three years.

<TABLE>
<CAPTION>
                                              Number of shares of         % of common stock held               Shares to be
                                              common stock held by      by each selling stockholder           offered pursuant
                                             each selling stockholder       before the offering              to this prospectus
                                             ------------------------       -------------------              ------------------
                                        Currently                        Currently                          Currently
                                        Owned (1)       Maximum (2)       Owned (1)   Maximum(2)         Owned (1)     Maximum (2)
-------------------------------         ----------       ----------      ---------    ----------        ----------     ----------
<S>                                     <C>              <C>            <C>           <C>               <C>            <C>
EnCap Energy Capital Fund III, L.P.....   1,568,853        1,845,998        8.0            9.3             814,903        1,092,048
EnCap Energy Capital Fund III-B, L.P...   1,186,496        1,396,102        6.2            7.2             616,313          825,918
BOCP Energy Partners, L.P..............     383,873          451,686        2.1            2.5             199,396          267,210
Energy Capital Investment Company PLC..     553,980          651,844        3.0            3.5             287,755          385,619
Kayne Anderson Energy Fund, L.P........   1,785,500        1,924,314        9.0            9.6             408,163          546,978
Kayne Anderson Diversified Capital
  Partners, L.P........................     952,978          980,741        5.2            5.4              81,633          109,396
Kayne Anderson Non-Traditional
  Investments, L.P.....................     742,942          770,707        4.1            4.2              81,633          109,396
Arbco Associates, L.P..................   1,282,064        1,379,234        6.9            7.4             285,714          382,884
Kayne Anderson Capital Partners, L.P...     301,062          308,002        1.7            1.7              20,408           27,349
Kayne Anderson Offshore Limited........     118,827          121,604        0.7            0.7               8,163           10,940
Kayne Anderson Capital Income Partners
  (Q.P.), L.P..........................      81,633          109,396        0.5            0.6              81,633          109,396
Hallco, Inc............................     163,265          218,791        0.9            1.2             163,265          218,791
Buena Vista Four Associates............      47,616           61,498        0.3            0.3              40,816           54,698
Michael Targoff Insurance Trust UAD
   1/3/90..............................     100,511          114,393        0.6            0.6              40,816           54,698
Michael B. Targoff.....................     227,277          241,159        1.3            1.3              40,816           54,698
Newberg Family Trust DTD 12/18/90......      81,633          109,396        0.5            0.6              81,633          109,396
EOS Partners, L.P......................     255,165          310,691        1.4            1.7             163,265          218,791
Richard A. Kayne.......................     200,110          259,800        1.1            1.4             159,184          213,321
John E. Anderson.......................     244,898          328,187        1.3            1.8             244,898          328,187
Strome Offshore Limited................     530,878          586,404        2.9            3.2             163,265          218,791
Strome Hedgecap Fund L.P...............     292,634          316,232        1.6            1.7              69,388           92,986
Strome Hedgecap Limited................      51,218           55,382        0.3            0.3              12,245           16,409
Thomas T. Hacking......................      18,327           23,879        0.1            0.1              16,327           21,879
          Totals.......................  11,171,739       12,565,438       58.7%          64.3%          4,081,631        5,469,777

<CAPTION>
                                           % of common
                                           stock held by
                                           each selling
                                           stockholder           Office, position or
                                            after the             relationship with
                                           offering (3)           Plains Resources
------------------------------------       -------------         -------------------
<S>                                        <C>                   <C>

EnCap Energy Capital Fund III, L.P.....           4.0                    (4)
EnCap Energy Capital Fund III-B, L.P...           3.0                    (4)
BOCP Energy Partners, L.P..............           1.0                    (4)
Energy Capital Investment Company PLC..           1.5                    (4)
Kayne Anderson Energy Fund, L.P........           7.1                    (5)
Kayne Anderson Diversified Capital
  Partners, L.P........................           4.8                    (5)
Kayne Anderson Non-Traditional
  Investments, L.P.....................           3.7                    (5)
Arbco Associates, L.P..................           5.4                    (5)
Kayne Anderson Capital Partners, L.P...           1.6                    (5)
Kayne Anderson Offshore Limited........           0.6                    (5)
Kayne Anderson Capital Income Partners
  (Q.P.), L.P..........................           0                      (5)
Hallco, Inc............................           0                      (6)
Buena Vista Four Associates............           0.04
Michael Targoff Insurance Trust UAD
   1/3/90..............................           0.3
Michael B. Targoff.....................           1.0
Newberg Family Trust DTD 12/18/90......           0
EOS Partners, L.P......................           0.5
Richard A. Kayne.......................           0.1                    (5)
John E. Anderson.......................           0                      (5)
Strome Offshore Limited................           2.0                    (7)
Strome Hedgecap Fund L.P...............           1.2                    (7)
Strome Hedgecap Limited................           0.2                    (7)
Thomas T. Hacking......................           0.01
          Totals.......................          38.05%
 </TABLE>
     _______________________________
     (1)  Includes that number of shares of common stock into which a selling
          stockholder could convert the shares of Series F preferred stock owned
          by him as of June 23, 2000.
     (2)  Represents the maximum number of shares of common stock that a selling
          stockholder could acquire upon conversion of shares of Series F
          preferred stock owned by him as of June 23, 2000, plus the maximum

                                       13
<PAGE>

     number of additional shares of Series F preferred stock that may be issued
     to him as dividends.
(3)  Consists of shares of common stock beneficially owned by selling
     stockholder as of June 23, 2000, excluding any shares of common stock
     issuable upon conversion of Series F Preferred Stock.
(4)  These selling stockholders are affiliates of EnCap Investments L.C.
     Collectively, such selling stockholders beneficially own 3,693,202 shares
     of common stock, including shares of common stock issuable upon conversion
     of our Series F preferred stock and our Series G preferred stock, which
     constitutes approximately 17.1 % of our common stock.  In connection with
     our sale of Series F preferred stock in December, 1999, if EnCap
     Investments L.C. requests, we must use reasonable efforts to cause our
     board of directors to be expanded and to cause EnCap's nominee to be
     elected to our board of directors.  EnCap has not yet requested us to take
     these steps.  EnCap Investments L.L.C., a Delaware Corporation, serves as
     general partner for EnCap Energy Capital Fund III, L.P. and EnCap Energy
     Capital Fund III-B, L.P.  In addition, EnCap Investments L.L.C. serves as
     Manager of BOCP Energy Partners, L.P.  As such, EnCap Investments L.L.C.
     has sole discretion over investments made by these entities.  The Managing
     Directors of EnCap Investments L.L.C. include Gary R. Petersen, Robert L.
     Zorich, D. Martin Phillips, and David B. Miller.  Energy Capital Investment
     Company PLC has sole discretion over its own investments.  The Board of
     Directors for Energy Capital Investment Company PLC consists of Peter
     Tudball (Chairman), Leo Deschuyteneer, Alan Henderson, James Ladner, Gary
     Petersen, and William Vanderfelt.
(5)  These selling stockholders are affiliates or clients of Kayne Anderson
     Investment Management, Inc. Robert V. Sinnott, a Vice President of Kayne
     Anderson, is also one of our directors.  Collectively, such selling
     stockholders beneficially own 5,710,014 shares of common stock, including
     shares of common stock issuable upon conversion of our Series F preferred
     stock and our Series G preferred stock and the exercise of warrants, which
     constitutes approximately 29.7 % of our common stock.  Richard Kayne owns
     75% of KA Holdings, Inc., a California corporation ("KA Holdings"), which
     owns all of Kayne Anderson Investment Managment, Inc., a Nevada corporation
     ("KAIM").  KAIM owns an 83.88% interest in Kayne Anderson Capital Advisors,
     L.P. with various individuals owning the rest.  Kayne Anderson Capital
     Advisors serves as the general partner of and investment advisor to all of
     the other of these selling stockholders, other than Kayne Anderson Offshore
     Limited, which is a corporation and therefore does not have a general
     partner.  Kayne Anderson Offshore Limited is wholly owned by Kayne Anderson
     Capital Advisors.
(6)  As reported on Schedule 13D filed on November 1, 1999, Mr. Arthur E. Hall
     is the President and controlling stockholder of Hallco, Inc.
(7)  These selling stockholders are affiliates of Strome Investment Management
     L.P. Collectively, these selling stockholders beneficially own 874,730
     shares of common stock, including shares of common stock issuable upon
     conversion of our Series F preferred stock and our Series G preferred
     stock, which constitutes approximately 4.8 % of our common stock.  As
     reported on Schedule 13G filed on December 31, 1999, SSCO, Inc. is the sole
     general partner of Strome Investment Management, L.P.  Mark E. Strome is
     the trustee of the trust that is the controlling shareholder of SSCO, Inc.

                             PLAN OF DISTRIBUTION

     We have been advised by the selling stockholders that the shares offered by
this prospectus may be sold from time to time by or for the account of the
selling stockholders pursuant to this prospectus or pursuant to Rule 144 under
the Securities Act of 1933. Sales of shares pursuant to this prospectus may be
made in the over-the-counter market, on the American Stock Exchange or otherwise
at prices and on terms then prevailing or at prices related to the then-current
market price.  In each case, how these shares are sold will be determined by the
selling stockholders. Sales may be made directly or through agents designated
from time to time, or through dealers or underwriters to be designated or in
negotiated transactions.

                                       14
<PAGE>

     The shares may be sold by any one or more of the following methods:

          .  a block trade, which may involve crosses, in which the seller's
             broker or dealer will attempt to sell the shares as agent but may
             position and resell a portion of the block as principal to
             facilitate the transaction;
          .  purchases by a broker or dealer as principal and resale by the
             broker or dealer for their account pursuant to this prospectus;
          .  exchange distributions and/or secondary distributions in accordance
             with the rules of the American Stock Exchange;
          .  ordinary brokerage transactions and transactions in which the
             broker solicits purchasers;
          .  privately negotiated transactions;
          .  through put or call options transactions; and
          .  through short sales.

     If applicable law requires, we will add a supplement to this prospectus to
disclose the following information about any particular offering:

          .  the specific shares to be sold;
          .  the names of the selling stockholders;
          .  the purchase prices and public offering prices;
          .  the names of any agent, dealer or underwriter making a sale of the
             shares; and
          .  any applicable commissions or discounts.

     The selling stockholders may sell shares directly to other purchasers,
through agents or through broker-dealers. Any selling agents or broker-dealers
may receive compensation in the form of underwriting discounts, concessions or
commissions from the selling stockholders, from purchasers of shares for whom
they act as agents, or from both sources. That compensation may be in excess of
customary commissions.

     The selling stockholders and any broker-dealers that participate in the
distribution of the shares may be deemed to be "underwriters" within the meaning
of the Securities Act of 1933 in connection with the sales. Any commissions, and
any profit on the resale of shares, received by the selling stockholders and any
such broker-dealers may be deemed to be underwriting discounts and commissions.
We have been advised by each of the selling stockholders that they have not, as
of the date of this prospectus, entered into any arrangement with any agent,
broker or dealer for the sale of the shares.

     Pursuant to the agreement relating to the purchase of our Series F
preferred stock by the selling stockholders, we have agreed to indemnify each
selling stockholder and any underwriter of the shares, as well as such
underwriter's officers, partners and directors and each person controlling such
underwriter, against certain liabilities, including liabilities arising under
the Securities Act of 1933.  The selling stockholders have agreed to indemnify
us and any underwriter of the shares, as well as such underwriter's officers,
directors, and each person who controls such underwriter, against certain
liabilities, including liabilities arising under the Securities Act of 1933.

     We may suspend the use of this prospectus and any supplements hereto
because of pending corporate developments, public filings with the Securities
Exchange Commission or similar events.

     We will pay all costs and expenses incurred by us in connection with the
registration of the sale of shares

                                       15
<PAGE>

pursuant to this prospectus. We will not be responsible for any commissions,
underwriting discounts or similar charges on sales of the shares.

                      WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and special reports, proxy statements and other
information with the SEC. You may read and copy any document we file at the
SEC's public reference rooms in Washington, D.C., New York, New York and
Chicago, Illinois. Please call the SEC at 1-800-SEC-0330 for further information
on the public reference rooms. Our SEC filings are also available to the public
from the SEC's website at "http://www.sec.gov."

     The SEC allows us to "incorporate by reference" the information we file
with them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
considered to be part of this prospectus, and information that we file later
with the SEC will automatically update and supersede this information. We
incorporate by reference the documents listed below and any future filings (File
No. 0-9808) that we will make with the SEC under Sections 13(a), 13(c), 14 or
15(d)of the Securities Exchange Act of 1934:

          .  Annual Report on Form 10-K for the fiscal year ended December 31,
             1999;

          .  Quarterly Report on Form 10-Q for the fiscal quarter ended March
             31, 2000;

          .  Definitive Proxy Statement filed on April 28, 2000;

          .  Current Report on Form 8-K filed on June 15, 2000; and

          .  The description of Plains Resources Inc. common stock contained in
             our Form 8-A filed February 2, 1990.

     You may obtain a free copy of these filings by writing or telephoning our
Investor Relations Department at the following address:

                    500 Dallas Street, Suite 700
                    Houston, Texas 77002
                    Telephone (713) 654-1414.

     This prospectus is part of a registration statement that we filed with the
SEC. You should rely only on the information or representations provided in this
prospectus. We have authorized no one to provide information other than that
provided in this prospectus. We have authorized no one to provide you with
different information. We are not making an offer of these securities in any
state where the offer is not permitted. You should not assume that the
information in this prospectus is accurate as of any date other than the date on
the front of the document.

                                 LEGAL MATTERS

     Michael R. Patterson, Esq., our former general counsel, issued an opinion
to us about the legality of our common stock and beneficially owned 138,316
shares of our common stock at the time of the issuance of such opinion.

                                       16
<PAGE>

                                    EXPERTS

     The financial statements incorporated in this Registration Statement by
reference to the Annual Report on Form 10-K of Plains Resources Inc. for the
year ended December 31, 1999 have been so incorporated in reliance on the report
(which contains a statement relating to the Company's restatement as described
in Note 3 to the financial statements) of PricewaterhouseCoopers LLP,
independent accountants, given on the authority of said firm as experts in
auditing and accounting.

                               RESERVE ENGINEERS

     Information relating to the estimated proved reserves of oil and natural
gas and the related estimates of future net revenues and present values thereof
for certain periods has been prepared by H. J. Gruy and Associates, Inc.,
Netherland, Sewell & Associates, Inc. and Ryder Scott Company, L.P., independent
petroleum engineers, and we have incorporated it by reference into this
prospectus in reliance on the authority of those firms as experts in petroleum
engineering.

                                       17
<PAGE>

                    INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

     The following is a statement of estimated expenses that we incurred in
connection with the common stock being registered hereby, other than
underwriting discounts and commissions.

<TABLE>
     <S>                                                    <C>
     Securities and Exchange Commission Registration Fee    $ 18,773
     American Stock Exchange Listing Fees                     17,500
     Legal Fees and Expenses                                       *
     Accounting Fees and Expenses                                  *
     Miscellaneous                                             6,727
                                                            --------
     Total                                                  $105,000
                                                            ========
</TABLE>


     _______________________________
     *To be filed by amendment.

Item 15. Indemnification of Directors and Officers

     Article Tenth of our Second Restated Certificate of Incorporation provides
that we shall indemnify to the full extent authorized or permitted by law any
person made, or threatened to be made, a party to any action, suit or proceeding
(whether civil, criminal or otherwise) by reason of fact that he, his testator
or intestate, is or was one of our directors or officers or by reason of the
fact that such director or officer, at our request, is or was serving any other
corporation, partnership, joint venture, trust, employee benefit plan or other
enterprise, in any capacity. The rights to indemnification set forth above are
not exclusive of any other rights to which such person may be entitled under any
statute, provision of our Second Restated Certificate of Incorporation or
bylaws, agreements, vote of stockholders or disinterested directors or
otherwise.


     Additionally, Article VIII of our Bylaws provides for mandatory
indemnification to at least the extent specifically allowed by Section 145 of
the General Corporation Law of the State of Delaware (the "GCL").  The Bylaws
generally follow the language of Section 145 of the GCL, but in addition specify
that any director, officer, employee or agent may apply to any court of
competent jurisdiction in the State of Delaware for indemnification to the
extent otherwise permissible under the Bylaws, notwithstanding any contrary
determination denying indemnification made by our board of directors, by
independent legal counsel, or by the stockholders, and notwithstanding the
absence of any determination with respect to indemnification.  The Bylaws also
specify circumstances in which a finding is required that the person seeking
indemnification acted in good faith, for purposes of determining whether
indemnification is available.  Under the Bylaws, a person shall be deemed to
have acted in good faith and in a manner he reasonably believed to be in or not
opposed to our best interests, or, with respect to any criminal action or
proceeding, to have had no reasonable cause to believe his conduct was unlawful,
if his action is based on our records or books of account or those of another
enterprise, or on information supplied to him by our officers or those of
another enterprise in the course of their duties, or on the advice of our legal
counsel or that of another enterprise or on information or records given or
reports made to us or another enterprise by an independent certified public
accountant or by an appraiser or other expert selected with reasonable care by
us or another enterprise.

     Pursuant to Section 145 of the GCL, we generally have the power to
indemnify our current and former directors, officers, employees and agents
against expenses and liabilities incurred by them in connection with any

                                      II-1
<PAGE>

suit to which they are, or are threatened to be made, a party by reason of their
serving in such positions so long as they acted in good faith and in a manner
they reasonably believed to be in, or not opposed to, our best interests, and
with respect to any criminal action, they had no reasonable cause to believe
their conduct was unlawful. With respect to suits by or in our right, however,
indemnification is generally limited to attorneys' fees and other expenses and
is not available if such person is adjudged to be liable to us unless the court
determines that indemnification is appropriate. The statute expressly provides
that the power to indemnify authorized thereby is not exclusive of any rights
granted under any bylaw, agreement, vote of stockholders or disinterested
directors, or otherwise. We also have the power to purchase and maintain
insurance for such persons.

     The above discussion of our Second Restated Certificate of Incorporation
and Bylaws, and Section 145 of the GCL is not intended to be exhaustive and is
qualified in its entirety by each of such documents and such statute.

     We have entered into employment agreements containing indemnification
provisions with Mr. Greg L. Armstrong, our President and Chief Executive Officer
and Harry N. Pefanis, our Executive Vice President -Midstream.  Pursuant to such
agreements, we have agreed to indemnify and hold them harmless to the fullest
extent permitted by law, from any loss, damage or liability incurred in the
course of their employment.  The amount paid by us is reducible by the amount of
insurance paid to or on their behalf with respect to any event giving rise to
indemnification.  Their right to indemnification is to survive their death or
termination of employment and the termination of their employment agreement.
Our board of directors has also authorized an employment agreement with Mr.
William C. Egg, Jr., our Executive Vice President and Chief Operating Officer -
Upstream, which, as authorized, will have indemnification provisions
substantially the same as Messrs. Armstrong's and Pefanis' agreements described
above.

Item 16. Exhibits and Financial Statement Schedules

     (a)  Exhibits

     2.1  --   Stock Purchase Agreement dated as of March 15, 1998, among Plains
               Resources Inc., Plains All American Inc. and Wingfoot Ventures
               Seven Inc. (incorporated by reference to Exhibit 2(b) to the
               Company's Annual Report on Form 10-K for the year ended December
               31, 1997).

     4.1  --   Indenture dated as of March 15, 1996, among the Company, the
               Subsidiary Guarantors named therein and Texas Commerce Bank
               National Association, as Trustee for the Company's 10 1/4% Senior
               Subordinated Notes due 2006, Series A and Series B (incorporated
               by reference to Exhibit 4(b) to the Company's Form S-3
               (Registration No. 333-1851)).

     4.2  --   Indenture dated as of July 21, 1997, among the Company, the
               Subsidiary Guarantors named therein and Texas Commerce Bank
               National Association, as Trustee for the Company's 10 1/4% Senior
               Subordinated Notes due 2006, Series C and Series D (incorporated
               by reference to Exhibit 4 to the Company's Quarterly Report on
               Form 10-Q for the quarterly period ended June 30, 1997).

     4.3  --   Specimen Common Stock Certificate (incorporated by reference to
               Exhibit 4 to the Company's Form S-1 Registration Statement (Reg.
               No. 33-33986)).

     4.4  --   Purchase Agreement for Stock Warrant dated May 16, 1994, between
               Plains Resources

                                      II-2
<PAGE>


               Inc. and Legacy Resources, Co., L.P. (incorporated by reference
               to Exhibit 4(d) to the Company's Quarterly Report on Form 10-Q
               for the quarterly period ended June 30, 1994).

     4.5  --   Warrant dated November 12, 1997, to Shell Land & Energy Company
               for the purchase of 150,000 shares of Common Stock (incorporated
               by reference to Exhibit 4(d) to the Company's Quarterly Report on
               Form 10-Q for the quarterly period ended September 30, 1997).

     4.6  --   Indenture dated as of September 15, 1999, among Plains Resources
               Inc., the Subsidiary Guarantors named therein and Chase Bank of
               Texas, National Association, as Trustee (incorporated by
               reference to Exhibit 4(a) to the Company's Quarterly Report on
               Form 10-Q for the quarterly period ended September 30, 1999).

     4.7  --   Registration Rights Agreement dated as of September 22, 1999,
               among Plains Resources Inc., the Subsidiary Guarantors named
               therein, J.P. Morgan Securities Inc. and First Union Capital
               Markets Corp. (incorporated by reference to Exhibit 4(b) to the
               Company's Quarterly Report on Form 10-Q for the quarterly period
               ended September 30, 1999).

     4.8  --   Stock Purchase Agreement dated as of December 15, 1999, among
               Plains Resources Inc. and the purchasers named therein
               (incorporated by reference to Exhibit 4(g) to the Company's
               Annual Report on Form 10-K for the year ended December 31, 1999).

     4.9  --   Amendment to Stock Purchase Agreement dated as of December 17,
               1999, among Plains Resources Inc. and the purchasers named
               therein (incorporated by reference to Exhibit 4(h) to the
               Company's Annual Report on Form 10-K for the year ended December
               31, 1999)

     +5.1  --  Opinion of Michael R. Patterson, Esq.


     10.1  --  Employment Agreement dated as of March 1, 1993, between the
               Company and Greg L. Armstrong (incorporated by reference to
               Exhibit 10(b) to the Company's Annual Report on Form 10-K for the
               year ended December 31, 1993).


     10.2  --  The Company's 1991 Management Options (incorporated by reference
               to Exhibit 4.1 to the Company's Form S-8 Registration Statement
               (Reg. No. 33-43788)).

     10.3  --  The Company's 1992 Stock Incentive Plan (incorporated by
               reference to Exhibit 4.3 to the Company's Form S-8 Registration
               Statement (Reg. No. 33-48610)).

     10.4  --  The Company's Amended and Restated 401(k) Plan (incorporated by
               reference to Exhibit 10(d) to the Company's Annual Report on Form
               10-K for the year ended December 31, 1996).

     10.5  --  The Company's 1996 Stock Incentive Plan (incorporated by
               reference to Exhibit 4 to the Company's Form S-8 Registration
               Statement (Reg. No. 333-06191)).

                                      II-3
<PAGE>


     10.6  --  Stock Option Agreement dated August 27, 1996 between the Company
               and Greg L. Armstrong (incorporated by reference to Exhibit 10(l)
               to the Company's Annual Report on Form 10-K for the year ended
               December 31, 1996).

     10.7  --  Stock Option Agreement dated August 27, 1996 between the Company
               and William C. Egg Jr. (incorporated by reference to Exhibit
               10(m) to the Company's Annual Report on Form 10-K for the year
               ended December 31, 1996).

     10.8  --  First Amendment to the Company's 1992 Stock Incentive Plan
               (incorporated by reference to Exhibit 10(n) to the Company's
               Annual Report on Form 10-K for the year ended December 31, 1996).

     10.9  --  Second Amendment to the Company's 1992 Stock Incentive Plan
               (incorporated by reference to Exhibit 10(b) to the Company's
               Quarterly Report on Form 10-Q for the quarterly period ended June
               30, 1997).

     10.10 --  Fourth Amended and Restated Credit Agreement dated May 22,1998,
               among the Company and ING (U.S.) Capital Corporation, et. al.
               (incorporated by reference to Exhibit 10(y) to the Company's
               Quarterly Report on Form 10-Q for the quarterly period ended June
               30, 1998)

     10.11 --  First Amendment to Plains Resources Inc. 1996 Stock Incentive
               Plan dated May 21, 1998 (incorporated by reference to Exhibit
               10(z) to the Company's Quarterly Report on Form 10-Q for the
               quarterly period ended September 30, 1998)

     10.12 --  Third Amendment to Plains Resources Inc. 1992 Stock Incentive
               Plan dated May 21, 1998 (incorporated by reference to Exhibit
               10(aa) to the Company's Quarterly Report on Form 10-Q for the
               quarterly period ended September 30, 1998)

     10.13 --  First Amendment to Fourth Amended and Restated Credit Agreement
               dated as of November 17, 1998, among the Company and ING (U.S.)
               Capital Corporation, et. al. (incorporated by reference to
               Exhibit 10(m) to the Company's Annual Report on Form 10-K for the
               year ended December 31, 1998).

     10.14 --  Second Amendment to Fourth Amended and Restated Credit Agreement
               dated as of March 15, 1999, among the Company and ING (U.S.)
               Capital Corporation, et. al. (incorporated by reference to
               Exhibit 10(n) to the Company's Annual Report on Form 10-K for the
               year ended December 31, 1998).

     10.15 --  Employment Agreement dated as of November 23, 1998, between
               Harry N. Pefanis and the Company (incorporated by reference to
               Exhibit 10(o) to the Company's Annual Report on Form 10-K for the
               year ended December 31, 1998).

     10.16 --  Purchase and Sale Agreement dated June 4, 1999, by and among the
               Company, Chevron U.S.A., Inc., and Chevron Pipe Line Company
               (incorporated by reference to Exhibit 10(h) to the Company's
               Quarterly Report on Form 10-Q for the quarterly period ended June
               30, 1999).

                                      II-4
<PAGE>


     10.17 --  Third Amendment to Fourth Amended and Restated Credit Agreement
               dated June 21, 1999, among the Company and ING (U.S.) Capital
               Corporation, et. al. (incorporated by reference to Exhibit 10(p)
               to the Company's Quarterly Report on Form 10-Q for the quarterly
               period ended June 30, 1999).

     10.18 --  Second Amendment to Plains Resources 1996 Stock Incentive Plan
               dated May 20, 1999 (incorporated by reference to Exhibit 10(q) to
               the Company's Quarterly Report on Form 10-Q for the quarterly
               period ended June 30, 1999).

     10.19 --  Fourth Amendment to Fourth Amended and Restated Credit Agreement
               dated September 15, 1999, among the Company and First Union
               National Bank, et al. (incorporated by reference to Exhibit 10(q)
               to the Company's Quarterly Report on Form 10-Q for the quarterly
               period ended September 30, 1999).

     10.20 --  Fifth Amendment to Fourth Amended and Restated Credit Agreement
               dated December 1, 1999, among the Company and First Union
               National Bank, et al. (incorporated by reference to Exhibit 10(t)
               to the Company's Annual Report on Form 10-K for the year ended
               December 31, 1999).

     10.21 --  Contribution, Conveyance and Assumption Agreement among Plains
               All American Pipeline, L.P. and certain other parties dated as of
               November 23, 1998 (incorporated by reference to Exhibit 10.03 to
               Annual Report on Form 10-K for Plains All American Pipeline, L.P.
               for the Year Ended December 31, 1998).

     10.22 --  Plains All American Inc., 1998 Long-Term Incentive Plan
               (incorporated by reference to Exhibit 10.04 to Annual Report on
               Form 10-K for Plains All American Pipeline, L.P. for the Year
               Ended December 31, 1998).

     10.23 --  Plains All American Inc., 1998 Management Incentive Plan Plains
               All American Inc., 1998 Long-Term Incentive Plan (incorporated by
               reference to Exhibit 10.05 to Annual Report on Form 10-K for
               Plains All American Pipeline, L.P. for the Year Ended December
               31, 1998).

     10.24 --  Crude Oil Marketing Agreement among Plains Resources Inc.,
               Plains Illinois Inc., Stocker Resources, L.P., Calumet Florida,
               Inc. and Plains Marketing, L.P. dated as of November 23, 1998
               (incorporated by reference to Exhibit 10.07 to Annual Report on
               Form 10-K for Plains All American Pipeline, L.P. for the Year
               Ended December 31, 1998).

     10.25 --  Omnibus Agreement among Plains Resources Inc., Plains All
               American Pipeline, L.P., Plains Marketing, L.P., All American
               Pipeline, L.P., and Plains All American Inc. dated as of November
               23, 1998 (incorporated by reference to Exhibit 10.08 to Annual
               Report on Form 10-K for Plains All American Pipeline, L.P. for
               the Year Ended December 31, 1998).

     10.26 --  Transportation Agreement dated July 30, 1993, between All
               American Pipeline Company and Exxon Company, U.S.A. (incorporated
               by reference to Exhibit 10.9 to Registration Statement filed by
               Plains All American Pipeline, L.P., file No. 333-64107).

                                      II-5
<PAGE>


     10.27 --  Transportation Agreement dated August 2, 1993, between All
               American Pipeline Company and Texaco Trading and Transportation
               Inc., Chevron U.S.A. and Sun Operating Limited Partnership
               (incorporated by reference to Exhibit 10.10 to Registration
               Statement filed by  Plains All American Pipeline, L.P., file No.
               333-64107).

     10.28 --  Form of Transaction Grant Agreement (Payment on Vesting)
               (incorporated by reference to Exhibit 10.12 to Registration
               Statement filed by Plains All American Pipeline, L.P., file No.
               333-64107).

     10.29 --  First Amendment to Contribution, Conveyance and Assumption
               Agreement dated as of December 15, 1998 (incorporated by
               reference to Exhibit 10.13 to Annual Report on Form 10-K for
               Plains All American Pipeline, L.P. for the Year Ended December
               31, 1998).

     10.30 --  Agreement for Purchase and Sale of Membership Interest in
               Scurlock Permian LLC between Marathon Ashland LLC and Plains
               Marketing, L.P. dated as of March 17, 1999 (incorporated by
               reference to Exhibit 10.16 to Annual Report on Form 10-K for
               Plains All American Pipeline, L.P. for the Year Ended December
               31, 1998).

     10.31 --  Asset Sales Agreement between Chevron Pipe Line Company and
               Plains Marketing, L.P. dated as of April 16, 1999 (incorporated
               by reference to Exhibit 10.17 to Quarterly Report on Form 10-Q
               for Plains All American Pipeline, L.P. for the Quarter Ended
               March 31, 1999).

     10.32 --  Transaction Grant Agreement with Greg L. Armstrong (incorporated
               by reference to Exhibit 10.20 to Registration Statement on Form
               S-1 for Plains All American Pipeline, L.P., file no. 333-86907).

     10.33 --  Pipeline Sale and Purchase Agreement dated January 31, 2000,
               among Plains All American Pipeline, L.P., All American Pipeline,
               L.P., El Paso Natural Gas Company and El Paso Pipeline Company
               (incorporated by reference to Exhibit 10.27 to Annual Report on
               Form 10-K for Plains All American Pipeline, L.P. for the Year
               Ended December 31, 1999).

     10.34 --  Credit Agreement [Letter of Credit and Hedged Inventory
               Facility] dated May 8, 2000, among Plains Marketing, L.P., All
               American Pipeline, L.P., Plains All American Pipeline, L.P. and
               Fleet National Bank and certain other lenders.  (incorporated by
               reference to Exhibit 10.01 to the Quarterly Report on Form 10-Q
               for Plains All American Pipeline, L.P. for the quarterly period
               ended March 31, 2000).

     10.35 --  Credit Agreement [Revolving Credit Facility] dated May 8, 2000,
               among Plains Marketing, L.P., All American Pipeline, L.P., Plains
               All American Pipeline, L.P. and Fleet National Bank and certain
               other lenders (incorporated by reference to Exhibit 10.02 to the
               Quarterly Report on Form 10-Q for Plains All American Pipeline,
               L.P. for the quarterly period ended March 31, 2000).

     +23.1 -   Consent of Michael R. Patterson, Esq. (contained in Exhibit 5).

                                      II-6
<PAGE>


    ++23.2 --  Consent of PricewaterhouseCoopers LLP

     +23.3 --  Consent of Netherland, Sewell & Associates, Inc.

     +23.4 --  Consent of H.J. Gruy and Associates, Inc.

     +23.5 --  Consent of Ryder Scott Company, L.P.

     +24.1 --  Powers of Attorney (included at page II-4 of this Registration
               Statement as originally filed).

+ Previously filed.
++ Filed herewith.

                                      II-7
<PAGE>

Item 17. Undertakings

     (a)  The undersigned registrant hereby undertakes:

          (1)  To file, during any period in which offers or sales are being
     made, a post-effective amendment to this registration statement: (i) to
     include any prospectus required by Section 10(a)(3) of the Securities Act
     of 1933 (the "Securities Act"); (ii) to reflect in this prospectus any
     facts or events arising after the effective date of the registration
     statement (or the most recent post-effective amendment thereof) that,
     individually or in the aggregate, represent a fundamental change in the
     information set forth in the registration statement; (iii) to include any
     material information with respect to the plan of distribution not
     previously disclosed in the registration statement or any material change
     to such information in the registration statement; provided, however, that
     paragraph (a)(1)(i) and (a)(1)(ii) do not apply if the information required
     to be included in a post-effective amendment by those paragraphs is
     contained in periodic reports filed by the registrant pursuant to Section
     13 or Section 15(d) of the Securities Exchange Act of 1934 (the "Exchange
     Act") that are incorporated by reference in the registration statement.

          (2)  That, for the purpose of determining any liability under the
     Securities Act, each post-effective amendment that contains a form of
     prospectus shall be deemed to be a new registration statement relating to
     the securities offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.

          (3)  To remove from registration by means of a post-effective
     amendment any of the securities being registered that remain unsold at the
     termination of the offering.

     (b)  The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act that is incorporated by reference in the registration statement
shall be deemed to be a new registration statement relating to the securities
offered therein, and the offering of such securities at that time shall deemed
to be the initial bona fide offering thereof.

     (c)  Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Securities Act and
is, therefore, unenforceable. If a claim for indemnification against such
liabilities (other than the payment by the registrant of expenses incurred or
paid by a director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, then the registrant will, unless in the opinion of its counsel the
matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Securities Act and will be governed by
the final adjudication of such issue.



                                      II-8
<PAGE>

                                  SIGNATURES


     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this amendment to
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Houston, State of Texas, on the 23/rd/ day of
June, 2000.

                     PLAINS RESOURCES INC.


                     By:                   /s/ Greg L. Armstrong
                        -------------------------------------------------------
                        Greg L. Armstrong, President and Chief Executive Officer


     Pursuant to the requirements of the Securities Act of 1933, this amendment
to Registration Statement has been signed by the following persons, in the
capacities indicated on the 23/rd/ day of June, 2000.

<TABLE>
<CAPTION>
               Signature                                              Capacity
               ---------                                              --------
               <S>                                          <C>
                     /s/ Greg L. Armstrong                  President, Chief Executive Officer and Director
               ---------------------------------            (Principal Executive Officer)
                        Greg L. Armstrong



                     /s/ Jerry L. Dees*                                    Director
               ---------------------------------
                        Jerry L. Dees


                     /s/ Tom H. Delimitros*                                Director
               ---------------------------------
                        Tom H. Delimitros


                     /s/ Cynthia A. Feeback                 Vice President - Accounting and Assistant
               ---------------------------------              Treasurer (Principal Accounting Officer)
                        Cynthia A. Feeback

                     /s/ William M. Hitchcock*                             Director
               ---------------------------------
                         William M. Hitchcock
</TABLE>

                                      II-9
<PAGE>

<TABLE>
                <S>                                    <C>

                     /s/ Phillip D. Kramer             Executive Vice President, Treasurer and Chief
               ---------------------------------       Financial Officer (Principal Financial Officer)
                         Phillip D. Kramer


                     /s/ Dan M. Krausse*                    Chairman of the Board and Director
               ---------------------------------
                         Dan M. Krausse


                     /s/ John H. Lollar*                              Director
               ---------------------------------
                         John H. Lollar


                     /s/ Robert V. Sinnott*                           Director
               ---------------------------------
                         Robert V. Sinnott


                     /s/ J. Taft Symonds*                             Director
               ---------------------------------
                         J. Taft Symonds
</TABLE>


*By:      /s/ Phillip D. Kramer
          Phillip D. Kramer, as attorney-in-fact
          for the persons indicated

                                     II-10
<PAGE>

                               INDEX TO EXHIBITS

Exhibit
Number
------

2.1  --   Stock Purchase Agreement dated as of March 15, 1998, among Plains
          Resources Inc., Plains All American Inc. and Wingfoot Ventures Seven
          Inc. (incorporated by reference to Exhibit 2(b) to the Company's
          Annual Report on Form 10-K for the year ended December 31, 1997).

4.1  --   Indenture dated as of March 15, 1996, among the Company, the
          Subsidiary Guarantors named therein and Texas Commerce Bank National
          Association, as Trustee for the Company's 10 1/4% Senior Subordinated
          Notes due 2006, Series A and Series B (incorporated by reference to
          Exhibit 4(b) to the Company's Form S-3 (Registration No. 333-1851)).

4.2  --   Indenture dated as of July 21, 1997, among the Company, the Subsidiary
          Guarantors named therein and Texas Commerce Bank National Association,
          as Trustee for the Company's 10 1/4% Senior Subordinated Notes due
          2006, Series C and Series D (incorporated by reference to Exhibit 4 to
          the Company's Quarterly Report on Form 10-Q for the quarterly period
          ended June 30, 1997).

4.3  --   Specimen Common Stock Certificate (incorporated by reference to
          Exhibit 4 to the Company's Form S-1 Registration Statement (Reg. No.
          33-33986)).

4.4  --   Purchase Agreement for Stock Warrant dated May 16, 1994, between
          Plains Resources Inc. and Legacy Resources, Co., L.P. (incorporated by
          reference to Exhibit 4(d) to the Company's Quarterly Report on Form
          10-Q for the quarterly period ended June 30, 1994).

4.5  --   Warrant dated November 12, 1997, to Shell Land & Energy Company for
          the purchase of 150,000 shares of Common Stock (incorporated by
          reference to Exhibit 4(d) to the Company's Quarterly Report on Form
          10-Q for the quarterly period ended September 30, 1997).

4.6  --   Indenture dated as of September 15, 1999, among Plains Resources Inc.,
          the Subsidiary Guarantors named therein and Chase Bank of Texas,
          National Association, as Trustee (incorporated by reference to Exhibit
          4(a) to the Company's Quarterly Report on Form 10-Q for the quarterly
          period ended September 30, 1999).

4.7  --   Registration Rights Agreement dated as of September 22, 1999, among
          Plains Resources Inc., the Subsidiary Guarantors named therein, J.P.
          Morgan Securities Inc. and First Union Capital Markets Corp.
          (incorporated by reference to Exhibit 4(b) to the Company's Quarterly
          Report on Form 10-Q for the quarterly period ended September 30,
          1999).

4.8  --   Stock Purchase Agreement dated as of December 15, 1999, among Plains
          Resources Inc. and the purchasers named therein (incorporated by
          reference to Exhibit 4(g) to the Company's Annual Report on Form 10-K
          for the year ended December 31, 1999).

4.9  --   Amendment to Stock Purchase Agreement dated as of December 17, 1999,
          among Plains Resources Inc. and the purchasers named therein
          (incorporated by reference to Exhibit 4(h) to the Company's Annual
          Report on Form 10-K for the year ended December 31, 1999)
<PAGE>

+5.1 --   Opinion of Michael R. Patterson, Esq.


10.1 --   Employment Agreement dated as of March 1, 1993, between the Company
          and Greg L. Armstrong (incorporated by reference to Exhibit 10(b) to
          the Company's Annual Report on Form 10-K for the year ended December
          31, 1993).

10.2 --   The Company's 1991 Management Options (incorporated by reference to
          Exhibit 4.1 to the Company's Form S-8 Registration Statement (Reg. No.
          33-43788)).

10.3 --   The Company's 1992 Stock Incentive Plan (incorporated by reference to
          Exhibit 4.3 to the Company's Form S-8 Registration Statement (Reg. No.
          33-48610)).

10.4 --   The Company's Amended and Restated 401(k) Plan (incorporated by
          reference to Exhibit 10(d) to the Company's Annual Report on Form 10-K
          for the year ended December 31, 1996).

10.5 --   The Company's 1996 Stock Incentive Plan (incorporated by reference to
          Exhibit 4 to the Company's Form S-8 Registration Statement (Reg. No.
          333-06191)).

10.6 --   Stock Option Agreement dated August 27, 1996 between the Company and
          Greg L. Armstrong (incorporated by reference to Exhibit 10(l) to the
          Company's Annual Report on Form 10-K for the year ended December 31,
          1996).

10.7 --   Stock Option Agreement dated August 27, 1996 between the Company and
          William C. Egg Jr. (incorporated by reference to Exhibit 10(m) to the
          Company's Annual Report on Form 10-K for the year ended December 31,
          1996).

10.8 --   First Amendment to the Company's 1992 Stock Incentive Plan
          (incorporated by reference to Exhibit 10(n) to the Company's Annual
          Report on Form 10-K for the year ended December 31, 1996).

10.9 --   Second Amendment to the Company's 1992 Stock Incentive Plan
          (incorporated by reference to Exhibit 10(b) to the Company's Quarterly
          Report on Form 10-Q for the quarterly period ended June 30, 1997).

10.10 --  Fourth Amended and Restated Credit Agreement dated May 22,1998, among
          the Company and ING (U.S.) Capital Corporation, et. al. (incorporated
          by reference to Exhibit 10(y) to the Company's Quarterly Report on
          Form 10-Q for the quarterly period ended June 30, 1998)

10.11 --  First Amendment to Plains Resources Inc. 1996 Stock Incentive Plan
          dated May 21, 1998 (incorporated by reference to Exhibit 10(z) to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          September 30, 1998)

10.12 --  Third Amendment to Plains Resources Inc. 1992 Stock Incentive Plan
          dated May 21, 1998 (incorporated by reference to Exhibit 10(aa) to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          September 30, 1998)

10.13 --  First Amendment to Fourth Amended and Restated Credit Agreement dated
          as of November 17,
<PAGE>


          1998, among the Company and ING (U.S.) Capital Corporation, et. al.
          (incorporated by reference to Exhibit 10(m) to the Company's Annual
          Report on Form 10-K for the year ended December 31, 1998).

10.14  -- Second Amendment to Fourth Amended and Restated Credit Agreement dated
          as of March 15, 1999, among the Company and ING (U.S.) Capital
          Corporation, et. al. (incorporated by reference to Exhibit 10(n) to
          the Company's Annual Report on Form 10-K for the year ended December
          31, 1998).

10.15  -- Employment Agreement dated as of November 23, 1998, between Harry N.
          Pefanis and the Company (incorporated by reference to Exhibit 10(o) to
          the Company's Annual Report on Form 10-K for the year ended December
          31, 1998).

10.16  -- Purchase and Sale Agreement dated June 4, 1999, by and among the
          Company, Chevron U.S.A., Inc., and Chevron Pipe Line Company
          (incorporated by reference to Exhibit 10(h) to the Company's Quarterly
          Report on Form 10-Q for the quarterly period ended June 30, 1999).

10.17  -- Third Amendment to Fourth Amended and Restated Credit Agreement dated
          June 21, 1999, among the Company and ING (U.S.) Capital Corporation,
          et. al. (incorporated by reference to Exhibit 10(p) to the Company's
          Quarterly Report on Form 10-Q for the quarterly period ended June 30,
          1999).

10.18  -- Second Amendment to Plains Resources 1996 Stock Incentive Plan dated
          May 20, 1999 (incorporated by reference to Exhibit 10(q) to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          June 30, 1999).

10.19  -- Fourth Amendment to Fourth Amended and Restated Credit Agreement dated
          September 15, 1999, among the Company and First Union National Bank,
          et al. (incorporated by reference to Exhibit 10(q) to the Company's
          Quarterly Report on Form 10-Q for the quarterly period ended September
          30, 1999).

10.20  -- Fifth Amendment to Fourth Amended and Restated Credit Agreement dated
          December 1, 1999, among the Company and First Union National Bank,
          et al. (incorporated by reference to Exhibit 10(t) to the Company's
          Annual Report on Form 10-K for the year ended December 31, 1999).

10.21  -- Contribution, Conveyance and Assumption Agreement among Plains All
          American Pipeline, L.P. and certain other parties dated as of November
          23, 1998 (incorporated by reference to Exhibit 10.03 to Annual Report
          on Form 10-K for Plains All American Pipeline, L.P. for the Year Ended
          December 31, 1998).

10.22  -- Plains All American Inc., 1998 Long-Term Incentive Plan (incorporated
          by reference to Exhibit 10.04 to Annual Report on Form 10-K for Plains
          All American Pipeline, L.P. for the Year Ended December 31, 1998).

10.23  -- Plains All American Inc., 1998 Management Incentive Plan Plains All
          American Inc., 1998 Long-Term Incentive Plan (incorporated by
          reference to Exhibit 10.05 to Annual Report on Form 10-K for Plains
          All American Pipeline, L.P. for the Year Ended December 31, 1998).

10.24  -- Crude Oil Marketing Agreement among Plains Resources Inc., Plains
          Illinois Inc., Stocker
<PAGE>


          Resources, L.P., Calumet Florida, Inc. and Plains Marketing, L.P.
          dated as of November 23, 1998 (incorporated by reference to Exhibit
          10.07 to Annual Report on Form 10-K for Plains All American Pipeline,
          L.P. for the Year Ended December 31, 1998).

10.25  -- Omnibus Agreement among Plains Resources Inc., Plains All American
          Pipeline, L.P., Plains Marketing, L.P., All American Pipeline, L.P.,
          and Plains All American Inc. dated as of November 23, 1998
          (incorporated by reference to Exhibit 10.08 to Annual Report on Form
          10-K for Plains All American Pipeline, L.P. for the Year Ended
          December 31, 1998).

10.26  -- Transportation Agreement dated July 30, 1993, between All American
          Pipeline Company and Exxon Company, U.S.A. (incorporated by reference
          to Exhibit 10.9 to Registration Statement filed by Plains All American
          Pipeline, L.P., file No. 333-64107).

10.27  -- Transportation Agreement dated August 2, 1993, between All American
          Pipeline Company and Texaco Trading and Transportation Inc., Chevron
          U.S.A. and Sun Operating Limited Partnership (incorporated by
          reference to Exhibit 10.10 to Registration Statement filed by  Plains
          All American Pipeline, L.P., file No. 333-64107).

10.28  -- Form of Transaction Grant Agreement (Payment on Vesting) (incorporated
          by reference to Exhibit 10.12 to Registration Statement filed by
          Plains All American Pipeline, L.P., file No. 333-64107).

10.29  -- First Amendment to Contribution, Conveyance and Assumption Agreement
          dated as of December 15, 1998 (incorporated by reference to Exhibit
          10.13 to Annual Report on Form 10-K for Plains All American Pipeline,
          L.P. for the Year Ended December 31, 1998).

10.30  -- Agreement for Purchase and Sale of Membership Interest in Scurlock
          Permian LLC between Marathon Ashland LLC and Plains Marketing, L.P.
          dated as of March 17, 1999 (incorporated by reference to Exhibit 10.16
          to Annual Report on Form 10-K for Plains All American Pipeline, L.P.
          for the Year Ended December 31, 1998).

10.31  -- Asset Sales Agreement between Chevron Pipe Line Company and Plains
          Marketing, L.P. dated as of April 16, 1999 (incorporated by reference
          to Exhibit 10.17 to Quarterly Report on Form 10-Q for Plains All
          American Pipeline, L.P. for the Quarter Ended March 31, 1999).

10.32  -- Transaction Grant Agreement with Greg L. Armstrong (incorporated by
          reference to Exhibit 10.20 to Registration Statement on Form S-1 for
          Plains All American Pipeline, L.P., file no. 333-86907).

10.33  -- Pipeline Sale and Purchase Agreement dated January 31, 2000, among
          Plains All American Pipeline, L.P., All American Pipeline, L.P., El
          Paso Natural Gas Company and El Paso Pipeline Company (incorporated by
          reference to Exhibit 10.27 to Annual Report on Form 10-K for Plains
          All American Pipeline, L.P. for the Year Ended December 31, 1999).

10.34  -- Credit Agreement [Letter of Credit and Hedged Inventory Facility]
          dated May 8, 2000, among Plains Marketing, L.P., All American
          Pipeline, L.P., Plains All American Pipeline, L.P. and Fleet National
          Bank and certain other lenders.  (incorporated by reference to Exhibit
          10.01 to the Quarterly Report on Form 10-Q for Plains All American
          Pipeline, L.P. for the quarterly period
<PAGE>


          ended March 31, 2000).

10.35  -- Credit Agreement [Revolving Credit Facility] dated May 8, 2000, among
          Plains Marketing, L.P., All American Pipeline, L.P., Plains All
          American Pipeline, L.P. and Fleet National Bank and certain other
          lenders (incorporated by reference to Exhibit 10.02 to the Quarterly
          Report on Form 10-Q for Plains All American Pipeline, L.P. for the
          quarterly period ended March 31, 2000).

+23.1  -- Consent of Michael R. Patterson, Esq. (contained in Exhibit 5).


++23.2 -- Consent of PricewaterhouseCoopers LLP

+23.3  -- Consent of Netherland, Sewell & Associates, Inc.

+23.4  -- Consent of H.J. Gruy and Associates, Inc.

+23.5  -- Consent of Ryder Scott Company, L.P.

+24.1  -- Powers of Attorney (included at page II-4 of this Registration
          Statement as originally filed).


_________________
+ Previously filed.
++ Filed herewith.


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