Exxon Mobil Corporation and Affiliated Companies, f.k.a. Exxon Corporation and Affiliated Companies v. Commissioner , 114 T.C. No. 20 ( 2000 )


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    114 T.C. No. 20
    UNITED STATES TAX COURT
    EXXON MOBIL CORPORATION AND AFFILIATED COMPANIES,
    f.k.a. EXXON CORPORATION AND AFFILIATED COMPANIES,
    Petitioners v. COMMISSIONER OF INTERNAL REVENUE, Respondent
    Docket Nos. 18618-89, 18432-90.        Filed May 3, 2000.
    Held: For the years before the Court,
    $204 million (reflecting petitioners’ 22-percent share
    of a total $928 million) in estimated dismantlement,
    removal, and restoration (DRR) costs relating to
    fieldwide oil production equipment and facilities
    located in the Prudhoe Bay oil field on the North Slope
    of Alaska is not sufficiently fixed and definite to be
    accruable under the all-events test of sec. 1.461-
    1(a)(2), Income Tax Regs.
    Held, further, for the years before the Court,
    $24 million (reflecting petitioners’ 22-percent share
    of a total $111 million) in estimated DRR costs
    relating specifically to oil wells and to well drilling
    sites located in the Prudhoe Bay oil field: (1) Is
    sufficiently fixed, definite, and reasonably
    determinable to satisfy the all-events accrual test of
    the accrual method of accounting; (2) is not accruable
    as a capital cost because such accrual would constitute
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    a change in petitioners’ method of accounting for such
    costs for which change respondent has not granted
    permission; and (3) is not accruable as a current
    ordinary and necessary business expense because such
    accrual would cause a distortion in petitioners’
    reporting of income.
    Robert L. Moore II, Jay L. Carlson, Thomas D. Johnston,
    Kevin L. Kenworthy, Emmett B. Lewis III, James P. Tuite, David B.
    Blair, Laura G. Ferguson, Troy J. Babin, Jeffrey S. Lynn, Paul F.
    Kirgis, and Matthew J. Borger, for petitioners.
    Richard L. Hunn, Robert M. Morrison, William G. Bissell,
    Carl D. Inskeep, Sandra K. Reid, Richard T. Cummings, and
    Richard D. Fultz, for respondent.
    SWIFT, Judge:    In these consolidated cases, respondent
    determined deficiencies in petitioners’ Federal income taxes for
    the years 1979 through 1982 as follows:
    Year               Deficiency
    1979             $  268,721,294
    1980              2,898,174,073
    1981              2,037,809,876
    1982              1,599,495,218
    After settlement of many issues and court decisions on three
    issues,1 the primary issue remaining for decision is whether
    1
    See Exxon Corp. v. Commissioner, 
    113 T.C. 338
     (1999)
    (involving the creditability of the United Kingdom petroleum
    revenue tax); Exxon Corp. v. Commissioner, 
    102 T.C. 721
     (1994)
    (involving percentage depletion); Exxon Corp. v. Commissioner,
    (continued...)
    - 3 -
    petitioners’ attempted accrual, for 1979 through 1982, of its
    $204 million share of $928 million in total estimated
    dismantlement, removal, and restoration (DRR) costs relating to
    oil wells and to oil production equipment and facilities in the
    Prudhoe Bay oil field on the North Slope of Alaska (North Slope)
    would satisfy the all-events test of the accrual method of
    accounting.   If, for the years in issue, the accrual of any of
    the estimated DRR costs would satisfy the all-events test of the
    accrual method of accounting, further issues are to be addressed
    relating to the amount and method of petitioners’ claimed accrual
    thereof.2
    Unless otherwise indicated, all section references are to
    the Internal Revenue Code in effect for the years in issue, and
    all Rule references are to the Tax Court Rules of Practice and
    Procedure.
    FINDINGS OF FACT
    The parties have stipulated numerous facts and the
    authenticity and admissibility of numerous exhibits.    The
    stipulated facts are so found.
    1
    (...continued)
    
    T.C. Memo. 1999-247
     (involving the accrual of deficiency
    interest).
    2
    The issues in these consolidated cases have also been
    raised by petitioners in timely filed claims for refund for 1977
    and 1978, which claims we understand to be still pending.
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    During the years in issue, petitioners constituted an
    affiliated group of more than 175 U.S. and 500 foreign subsidiary
    corporations.   At the time the petitions were filed, petitioner
    Exxon Corp. was the common parent of the affiliated group,
    incorporated in New Jersey, with its principal places of business
    located in New York, New York, or Houston, Texas.   Hereinafter,
    petitioners will be referred to simply as Exxon.3
    The businesses in which Exxon was engaged primarily involved
    exploration for and production, refining, transportation, and
    sale of crude oil, natural gas, and other petroleum products.
    During the years in issue, Exxon owned a 22-percent interest in
    the Prudhoe Bay Unit, a partnership of international oil and gas
    companies that owned and operated oil and gas leases in the
    Prudhoe Bay oil field on the North Slope of Alaska.
    Location of Prudhoe Bay Oil Field
    The Prudhoe Bay oil field is located in an extremely remote
    area 250 miles above the Arctic Circle on the North Slope of
    Alaska.   It is bounded by the Beaufort Sea on the north, the
    Arctic National Wildlife Refuge on the east, the Brooks Mountain
    Range on the south, and the Bering Sea on the west.
    3
    The parties appear to disagree as to Exxon’s principal
    place of business during the years in issue. If this question
    cannot be resolved by the parties by way of a post-opinion
    stipulation, it will be resolved in a Rule 155 hearing.
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    The surface of the Prudhoe Bay oil field consists of a flat,
    treeless, desert plain of approximately 69,000 square miles
    covered by a thin mat of vegetation and organic material called
    tundra.   Beneath the tundra is a layer of permafrost that extends
    to a depth of 1,800 to 2,000 feet.
    From mid-May through mid-September, the sun does not set on
    the North Slope.   Summer temperatures may reach 80 degrees
    Fahrenheit.   From June through September, when the tundra thaws
    to a depth of 12 to 18 inches, vehicular traffic on the tundra is
    prohibited unless authorized by permit and may be conducted only
    in specially designed vehicles called Rolligons.
    During summer, the permafrost traps water on the tundra
    surface, and the North Slope becomes a wetlands with thousands of
    shallow lakes and abundant wildlife, including numerous migratory
    birds and animals.
    In winter, North Slope temperatures fall to -70 degrees
    Fahrenheit, the tundra freezes, blizzards and whiteouts are
    common, and darkness prevails for much of the day.   In late
    November, the sun dips below the horizon and does not reappear
    until mid-January.
    In spite of harsh winter conditions, some work on the North
    Slope is better performed during winter because frozen tundra
    provides a better foundation for vehicular traffic than tundra
    that, during the summer, may not be passable.
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    In 1979, the U.S. Army Corps of Engineers designated the
    entire North Slope of Alaska as a protected wetlands.      Ninety-
    nine percent of the tundra on the North Slope is treated as
    wetlands for regulatory purposes.
    Even with the extensive oil wells and oil recovery equipment
    and facilities that were constructed in the Prudhoe Bay oil field
    and that will be described further below, the North Slope of
    Alaska accurately may be described and regarded as essentially
    undeveloped, as a habitat for fish, wildlife, and birds, with
    occasional subsistence use of the land by isolated Eskimo
    communities.
    Physical access to the North Slope is limited.    The Dalton
    Highway, a two-lane gravel road that traverses the Brooks
    Mountain Range, provides the only land access.    The only all-
    water route to the North Slope follows the west coast of Alaska
    north through the Bering Sea, around Point Barrow, and east to
    Prudhoe Bay.    Except during an ice thaw that lasts, on average,
    6 weeks in late summer when the Arctic ice cap sufficiently
    recedes from the shoreline, marine vessels and barges cannot
    access Prudhoe Bay.
    The North Slope has no significant local infrastructure.
    Fairbanks, located approximately 400 miles to the south and
    beyond the Brooks Mountain Range, is the nearest city to Prudhoe
    Bay.    Anchorage is located 700 miles to the south.    Other than
    the facilities and personnel associated with the Prudhoe Bay oil
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    field and a few other producing oil fields, there are scattered
    throughout the North Slope just a few isolated Eskimo
    communities.
    Because of its isolation and remoteness, labor, materials,
    equipment, and support services for major construction projects
    on the North Slope–-in particular, for construction and
    installation of the Prudhoe Bay oil field equipment and
    facilities–-must be imported, which significantly increases the
    costs of construction and of performing work on the North Slope.
    The oil companies’ total $11 billion capital cost, in the 1970's
    and early 1980's, of installing and constructing the Prudhoe Bay
    oil field equipment and facilities was more than four times what
    the total cost would have been to install and construct a
    comparable oil field in the lower 48 States.
    Alaska Oil and Gas Leases Relating to, and Discovery
    of, Oil Reserves in the Prudhoe Bay Oil Field
    In 1959, by the Alaska Statehood Law of 1958, Pub. L. 85-
    508, 
    72 Stat. 339
    , the Federal Government authorized the new
    State of Alaska to select 103,350,000 acres of Federal lands
    within the boundaries of Alaska to become State lands.    Alaska
    selected approximately 1.6 million acres on the North Slope
    between the Colville and Canning Rivers.
    In 1964, the State of Alaska began to offer to oil and gas
    companies oil and gas exploration and development leases on its
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    lands on the North Slope using the standard Alaska Competitive
    Oil and Gas Lease Form No. DL-1 (DL-1 Leases).
    In 1964, 1965, 1967, and 1969, using the DL-1 Leases, with
    Exxon, Atlantic Richfield Co. (ARCO), British Petroleum (BP), and
    other oil and gas companies, Alaska entered into the particular
    oil and gas leases covering the portions of the Prudhoe Bay oil
    field that are involved in these cases.   The terms of the DL-1
    Leases extended for 10 years subject to being renewed by the oil
    companies as long thereafter as oil or gas is produced “in paying
    quantities”.
    In December of 1967, Exxon and ARCO discovered a large oil
    and natural gas reservoir at an exploratory well that had been
    drilled on one of their jointly owned Prudhoe Bay leases.    The
    reservoir, named “Sadlerochit”, after the Eskimo word for “area
    outside the mountains”, was and remains the largest oil and gas
    reservoir ever discovered on the North American Continent.
    As of 1967, the reservoir was estimated to contain 23
    billion barrels of oil in place and 42 trillion cubic feet of
    natural gas.   Over its projected 30- to 50-year productive life,
    the Sadlerochit Reservoir was projected to produce from 13 to 14
    billion barrels of liquid hydrocarbons, approximately 60 percent
    of the original oil in place.
    Within the Prudhoe Bay field, the Sadlerochit Reservoir
    extends approximately 30 miles east to west and 13 miles north to
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    south.   It underlies approximately 111 Alaska oil and gas leases
    owned by various oil and gas companies.
    Construction of Trans-Alaska Pipeline and
    Unitization of Prudhoe Bay Oil Field
    In 1969, Exxon, ARCO, and BP announced plans to construct a
    798-mile pipeline to transport oil recovered from the Prudhoe Bay
    oil field to the port of Valdez, Alaska, from which the oil would
    be shipped to the lower 48 States and to other destinations
    throughout the World.   This pipeline came to be known as the
    Trans-Alaska Pipeline System (TAPS).
    TAPS was constructed under rights-of-way granted in 1974 by
    the Federal Government and Alaska to a group of seven pipeline
    companies, including subsidiaries of Exxon, ARCO, and BP.
    By early 1977 construction of TAPS was completed, and on
    June 20, 1977, oil production began from the wells located in the
    Prudhoe Bay oil field, and oil began flowing through TAPS to the
    port in Valdez, Alaska.
    Production Facilities Constructed in the Prudhoe Bay Oil Field
    Engineering obstacles that had to be overcome to construct
    the Prudhoe Bay oil wells and oil production facilities were
    enormous.   The North Slope’s harsh conditions, fragile
    environment, and remote location presented unique challenges to
    the design, construction, and installation of the Prudhoe Bay oil
    - 10 -
    field, the accomplishment of which constituted an engineering
    feat of breathtaking proportions.
    Construction of the oil wells and of the related oil
    production facilities at Prudhoe Bay represents the largest oil
    development project in our country’s history.   In addition to the
    oil wells, an extensive network of facilities was constructed to
    separate gas and water from crude oil recovered from the
    reservoir, to reinject separated natural gas and water into the
    reservoir in order to maintain reservoir pressure for enhanced
    oil recovery, to prepare recovered oil for transport through
    TAPS, to supply the necessary power and fuel requirements
    associated with all Prudhoe Bay operations, and to provide
    necessary support facilities.
    The Prudhoe Bay oil field is laid out in a manner similar to
    an offshore oil field with centralized oil production facilities
    and isolated drilling locations.    The oil well drilling equipment
    at the well sites rests on gravel pads called “well pads” from
    which multiple wells are drilled directionally underground into
    the oil reservoir.   The six large production centers within the
    oil field are called “gathering centers” or “flow stations”.
    Above-ground pipelines throughout the Prudhoe Bay oil field
    rest on vertical support members (VSM’s) and run from oil well
    drilling sites, to the production centers, and to TAPS.
    Pipelines within the Prudhoe Bay oil field are elevated on the
    VSM’s above the ground at a sufficient height so that the tundra
    - 11 -
    would not melt and so that moose and other wildlife would be able
    to traverse the pipelines.
    Due to the careful design, construction, and operation of
    the Prudhoe Bay oil field, the facilities and operations of the
    oil field have disturbed only 5,600 acres, or 2 percent, of the
    total land acreage at Prudhoe Bay.
    In light of the costly and difficult construction conditions
    on the North Slope, the large industrial buildings and facilities
    at Prudhoe Bay (such as the flow stations and power plant),
    initially were constructed as large, modular buildings in plants
    near Bellingham and Seattle, Washington.    The buildings, with the
    extensive equipment and facilities fully contained and installed
    therein, were then transported by special, oceangoing barges up
    the west coast of Canada through the Bering Sea to Prudhoe Bay
    where they were transported slowly over gravel roads to the
    installation sites in the Prudhoe Bay field.
    To protect the North Slope tundra from thermal damage, the
    large plants and buildings constituting the oil production
    facilities at Prudhoe Bay were installed on pilings and gravel
    pads rising 4 to 6 feet above ground level.    Once installed and
    in place at Prudhoe Bay, the modular segments of the large
    buildings were then joined together to form integrated facilities
    and buildings by connecting their structural components, piping,
    and electrical lines at interface points.
    - 12 -
    The oceangoing sealifts by which the equipment, buildings,
    and other facilities were transported by barge to Prudhoe Bay
    occurred in the 1970's and early 1980's.
    By July of 1984, construction, transportation, and
    installation costs of the wells, the equipment, the buildings,
    the pipelines, and the other facilities installed at the Prudhoe
    Bay field reflected, as indicated, a total capital cost to the
    oil companies of approximately $11 billion.   The facilities
    included 645 wells drilled on 37 drilling sites, 980 acres of
    pits, 800 miles of above-ground pipelines, 3 flow stations, 3
    gathering centers, a central power station, a central compressor
    plant, a base operations center, electrical lines and associated
    poles, switchgear, transformers, and an offshore seawater
    treatment plant completed in 1983 and connected to the mainland
    by a gravel causeway.
    Pump Station No. 1, the access or entry point from which oil
    flows out of the Prudhoe Bay oil production facilities and into
    TAPS, and a segment of the above-ground portion of TAPS lie
    within the geographical boundaries of the Prudhoe Bay oil field.
    Portions of the Endicott and Kuparuk pipelines, which transport
    crude oil from neighboring oil fields to Pump Station No. 1 for
    entry into TAPS, also traverse the Prudhoe Bay oil field.    In
    many areas, the Endicott, Kuparuk, and Prudhoe Bay pipelines are
    physically indistinguishable and run alongside each other,
    supported above the tundra by the same VSM’s.
    - 13 -
    Unitization of Oil Company Interests in Prudhoe Bay Oil Field
    Effective April 1, 1977, to save costs and to enhance
    operating efficiencies, Exxon and the other oil companies owning
    the oil exploration and production leases in the Prudhoe Bay
    field entered into a unitization or partnership agreement with
    the State of Alaska (Unit Agreement) under which they unitized
    their oil exploration and production leases into a single
    operating partnership, the Prudhoe Bay Unit (the PBU).
    The Unit Agreement divided the Prudhoe Bay oil field into
    two operating areas–-the Western Operating Area to be operated by
    BP and the Eastern Operating Area to be operated by ARCO.
    Also, effective April 1, 1977, the PBU partners entered into
    the PBU Operating Agreement (Operating Agreement), which
    established how the PBU would be operated and how costs would be
    shared among Exxon and the other oil companies with ownership
    interests in the PBU.   As indicated, under the Unit and Operating
    Agreements, Exxon’s share of the total costs of constructing and
    operating the Prudhoe Bay oil field was approximately 22 percent.
    When the PBU terminates, the individual leases to the oil
    companies will remain in force for at least 1 year or for as long
    as the lessee oil companies continue production of oil on the
    leases in paying quantities.   The separate oil companies may take
    over and continue to operate wells and equipment on their leases
    after the Unit Agreement terminates.    As permitted by
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    paragraph 36 of the DL-1 Leases, the lessees may salvage any
    remaining equipment within a reasonable time but not less than
    3 years after oil production terminates.
    The Unit Agreement incorporates therein whatever oil company
    DRR obligations existed under the DL-1 Leases with the State of
    Alaska.   It also stipulates that no well site may be abandoned
    until “final cleanup and revegetation, if required, is approved
    in writing” by the State.   The Unit Agreement modified the
    original DL-1 Leases in certain respects not pertinent to the
    issues involved herein.
    Production of Oil From Prudhoe Bay
    From 1980 to 1987, oil production from the Prudhoe Bay field
    was at its peak, averaging approximately 1.5 million barrels per
    day, approximately 25 percent of total U.S. oil production.
    Since 1987, oil production from the Prudhoe Bay field has been
    declining.   By 1997, more than 70 percent of the recoverable
    crude oil located in the Prudhoe Bay field had been recovered.
    Current projections by the PBU owners, the Alaska Department of
    Natural Resources, the Alaska Department of Revenue, and the
    North Slope Borough consistently forecast that oil production
    from the Prudhoe Bay field will end approximately in the year
    2030, well after estimated production from other known oil
    reservoirs on the North Slope will have ended.
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    The PBU partners originally believed that they might be able
    to recover and to market natural gas reserves located in the
    Prudhoe Bay field.   To date, however, studies conducted by the
    PBU partners and by State and Federal agencies indicate that
    natural gas recovery from Prudhoe Bay will not be economically
    viable given the projected low price of natural gas relative to
    the high cost of recovering, producing, and transporting natural
    gas from the Prudhoe Bay field to world markets.   In 1987, Exxon
    “debooked” (removed from “proved undeveloped” to “uneconomic”)
    the natural gas reserves in the Prudhoe Bay field.   In 1988, the
    U.S. Department of Energy (DOE) agreed with that decision and
    reduced its estimate of North Slope natural gas reserves by 24.6
    trillion cubic feet.
    The extensive Prudhoe Bay oil field production facilities
    and the TAPS pipeline from Prudhoe Bay to Valdez, Alaska, were
    designed for the recovery, processing, and transportation of
    crude oil, not natural gas, and it is not anticipated that any
    significant portion of the Prudhoe Bay oil field production
    facilities and the TAPS pipeline would be usable or modifiable
    for the eventual recovery and transportation of natural gas from
    the Prudhoe Bay field should recovery of the Prudhoe Bay natural
    gas someday become economically viable.   That is, it is
    anticipated that separate, new wells, processing, and
    transportation facilities would have to be constructed for the
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    recovery from the Prudhoe Bay field of natural gas, if recovery
    of such natural gas someday would become profitable.
    Terms of DL-1 Leases Relating to Exxon’s DRR Obligations
    The particular provisions of the DL-1 Leases (under which
    Exxon and the other oil companies conducted oil exploration and
    recovery activities in the Prudhoe Bay field) that apply to DRR
    obligations of Exxon and of the other oil companies upon
    termination of oil production in the Prudhoe Bay oil field are
    vague and general.
    The principal language of the DL-1 Leases that describes
    what is to happen--upon termination of oil production at Prudhoe
    Bay--to the extensive oil production equipment and facilities
    located in the Prudhoe Bay field is found in paragraph 36, which
    reads oddly and ambiguously in terms of “rights” and “privileges”
    of the oil companies (not in terms of DRR “duties or
    obligations”) as follows:
    RIGHTS ON TERMINATION. Upon the expiration or earlier
    termination of this lease as to all or any portion of said
    lands, * * * [Exxon] shall have the privilege at any time
    within a period of six months thereafter, or such extension
    thereof as may be granted * * * [by Alaska], of removing
    from said land or portion thereof all machinery, equipment,
    tools, and materials other than improvements needed for
    producing wells. Any materials, tools, appliances,
    machinery, structures, and equipment subject to removal as
    above provided which are allowed to remain on said land or
    portion thereof shall become the property of * * * [Alaska]
    upon expiration of such period; provided, that * * * [Exxon]
    shall remove any and all of such properties when so directed
    by * * * [Alaska]. Subject to the foregoing, * * * [Exxon]
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    shall deliver up said lands or such portion or portions
    thereof in good order and condition. [Emphasis added.]
    Language in paragraph 20 of the DL-1 Leases--pertaining
    generally to due diligence and to prevention of waste in the
    conduct of activities at Prudhoe Bay--does contain specific
    reference to Exxon’s (and to the other oil companies’)
    obligations to plug wells upon termination of oil production at
    the well sites.   That language also makes general reference to
    Alaska regulations “relating to the matters covered by this
    paragraph” (namely, to due diligence and to waste).   The language
    of paragraph 20, however, provides neither a description of DRR
    work that Exxon is or will be obligated to perform on leased
    property not associated with well sites nor specific reference to
    any Alaska regulations pertaining to broader fieldwide DRR
    obligations of the oil companies.   Paragraph 20 provides, in
    part, as follows:
    DILIGENCE; PREVENTION OF WASTE. * * * [Exxon]
    * * * shall plug securely in an approved manner any
    well before abandoning it; * * * and shall abide by and
    conform to valid applicable rules and regulations
    of the Alaska Oil and Gas Conservation Commission and
    the regulations of * * * [Alaska] relating to the
    matters covered by this paragraph in effect on the
    effective date hereof or hereafter in effect if not
    inconsistent with any specific provisions of this
    lease. [Emphasis added.]
    Language in paragraph 31 of the DL-1 Leases provides for
    assignment of the leases, or of undivided interests in the
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    leases, subject to the State's approval.    Language in paragraphs
    4, 7, 8, and 28 provides for suspension of operations without the
    leases expiring.
    Language in paragraph 33 of the DL-1 Leases provides that
    Exxon (and the other oil companies), should it so choose, may
    abandon or surrender its interests in the leases to the State,
    provided it--
    [places] all wells on the surrendered land * * * in
    condition satisfactory to * * * [Alaska] for suspension
    or abandonment; thereupon, * * * [Exxon] shall be
    released from all other obligations accrued or to
    accrue under this lease with respect to the surrendered
    lands * * *. [Emphasis added.]
    Alaska Law and Regulations Relating to
    Exxon’s DRR Obligations in Prudhoe Bay
    In 1959, the new State of Alaska Constitution provided for
    “development, and conservation of all natural resources * * * for
    the maximum benefit of its people.”    Alaska Const. art. VIII,
    sec. 2.   Alaska’s land management policies generally allow
    development of Alaska’s natural resources on condition that the
    environment be restored to the maximum reasonable extent upon
    completion of operations.
    In 1967, the Alaska Oil and Gas Conservation Commission
    (AOGCC) issued regulations relating to plugging and abandonment
    of oil wells and to cleanup of oil well sites.    See Alaska Admin.
    Code tit. 11, secs. 2101-2108 (effective Sept. 1967), later at
    Alaska Admin. Code tit. 11, secs. 22.100-22.110 (1973), and at
    - 19 -
    Alaska Admin. Code tit. 20, secs. 25.105-25.170 (1980).      These
    regulations are written only in terms of “plugging” the wells and
    cleaning up “loose debris” and restoring the well sites to a
    “generally level condition.”   The AOGCC regulations do not set
    forth or describe either specific or general DRR obligations of
    oil companies relating to the extensive Prudhoe Bay oil
    processing facilities not located at well drilling sites.
    In 1972, in anticipation of oil production at Prudhoe Bay, a
    joint Federal-State commission was established to study Alaska
    land use issues.   In 1979, the commission stated in its final
    report that development activities in the Arctic “should not lead
    to irreversible consequences” and that “areas impacted should be
    capable of restoration to a natural state upon the completion of
    development activities.”   (Emphasis added.)
    TAPS Right-Of-Way Provisions
    In contrast to the generally vague language of the
    DL-1 Leases relating to oil company DRR obligations in the
    Prudhoe Bay oil field, language in the TAPS right-of-way
    provisions relating to DRR obligations of the oil companies which
    constructed and which operate TAPS is more specific.    As
    explained, TAPS was constructed, and operates today, under lease
    rights-of-way granted in 1974 by the Federal and Alaska State
    Governments to a group of seven pipeline companies, which include
    subsidiaries of Exxon, ARCO, and BP.    The Federal and Alaska
    - 20 -
    right-of-way agreements for TAPS contain express language and
    provisions relating to oil company DRR obligations that
    specifically require the oil companies, upon termination of their
    use of the TAPS rights-of-way, to remove the facilities,
    improvements, and equipment.      The Federal right-of-way agreements
    for TAPS state:
    Stipulations for the Agreement and Grant of
    Right-of-Way for the Trans-Alaska Pipeline
    1.10.    Completion of Use
    1.10.1. * * * [the oil companies] shall promptly
    remove all improvements and equipment, except as
    otherwise approved in writing by the Authorized
    Officer, and shall restore the land to a condition
    that is satisfactory to the Authorized Officer or
    at the option of * * * [the oil companies] pay the
    cost of such removal and restoration. * * *
    [Emphasis added.]
    The State of Alaska right-of-way agreements for TAPS contain
    virtually the same language explicitly requiring the oil
    companies, upon shutting TAPS down, to perform or to pay for the
    DRR work associated with dismantling and removing the pipeline
    and restoring the land.
    DRR Liabilities Recognized for TAPS Rate Making Purposes
    As stated, the Federal right-of-way agreements and the
    permits relating to TAPS expressly require DRR work to be
    completed by the oil companies upon termination of pipeline
    operations.
    - 21 -
    Also, in setting transportation rates for TAPS and other
    pipelines on the North Slope, the Federal Energy Regulatory
    Commission (FERC) has permitted owners of the pipelines to treat
    estimated DRR costs as capital costs of constructing the
    pipelines and therefore as costs that are recoverable ratably
    over the life of the pipelines through rate charges for
    transporting oil through TAPS and the other pipelines.
    PBU Financial Statements and PBU Tax Reporting Relating to
    Estimated DRR Costs at Prudhoe Bay
    For all relevant years and all items (including DRR costs),
    the financial books and records and the Federal partnership
    income tax returns of the PBU were prepared on the accrual method
    of accounting.
    From formation of the PBU partnership through the years in
    issue, on the financial books and records and on the Federal
    income tax returns of the PBU partnership, DRR costs were accrued
    utilizing the all-events test of the accrual method of
    accounting.   At the time, it was understood generally within the
    oil industry that DRR costs could not be accrued for Federal
    income tax purposes until the related DRR work was actually
    performed.    This understanding was consistent with and followed
    respondent’s then-published position that DRR work had to be
    performed before the related DRR costs for tax purposes could be
    accrued under the all-events test.      See Rev. Rul. 80-182, 1980-
    2 C.B. 167
    .
    - 22 -
    Accordingly, for the years in issue, the PBU partnership
    accrued ordinary business expense deductions relating to DRR
    costs in the years in which the related DRR work was performed.
    On the PBU partnership Federal income tax returns for the
    years in issue (1979-82), with respect to estimated future
    Prudhoe Bay DRR costs associated with projected DRR work to be
    performed in subsequent years upon termination of oil production
    at Prudhoe Bay, no accrual was claimed for an increase to a
    capital liability account, for an increase in the depreciable tax
    basis of capital assets at the Prudhoe Bay field, nor for
    ordinary and necessary business expenses.
    During the years in issue, a PBU-sponsored DRR cost study
    relating to the Prudhoe Bay field was not completed.
    On its 1979 and 1980 partnership Federal income tax returns,
    the PBU elected to compute depreciation on its depreciable assets
    placed in service in those years under the class life asset
    depreciation range (ADR) system of section 1.167(a)-11, Income
    Tax Regs.   For those same years, PBU elected under section 167(f)
    to reduce the amount taken into account as salvage value by an
    amount not exceeding 10 percent of the basis of property
    depreciated under the ADR system.   In making this election, the
    PBU claimed that the gross salvage value did not exceed 10
    percent of the unadjusted basis of the facilities.   This election
    caused the salvage value of each ADR vintage account to be
    reduced to zero.   For 1981 and 1982, the PBU depreciated assets
    - 23 -
    placed in service in 1981 and 1982 under the Accelerated Cost
    Recovery System (ACRS) of section 168.
    Exxon’s Financial Reporting Relating to
    Estimated Prudhoe Bay DRR Costs
    In 1977, the Financial Accounting Standards Board (FASB)
    issued Statement of Financial Accounting Standards No. 19,
    “Financial Accounting and Reporting by Oil and Gas Producing
    Companies” (FAS 19),4 which required oil and gas companies, for
    financial income statement reporting purposes, to take estimated
    future DRR costs into account in determining amortization and
    depreciation rates.   For financial accounting purposes, oil and
    gas companies have estimated such costs in a variety of ways.
    Where estimates of DRR costs exceed estimated salvage value, oil
    and gas companies, including Exxon, have reported and claimed,
    for financial income statement reporting purposes, depreciation
    4
    Paragraph 37 of FAS 19 provides with regard to fixed DRR
    obligations the following income statement accounting for DRR:
    Estimated dismantlement, restoration, and abandonment costs
    and estimated residual salvage values shall be taken into
    account in determining amortization and depreciation rates.
    FAS 19 does not address the balance sheet accounting for
    DRR. In a February 1996 Exposure Draft entitled “Accounting for
    Certain Liabilities Related to Closure or Removal of Long-Lived
    Assets”, which would include onshore and offshore oil and gas
    production facilities, the FASB recommended that oil and gas
    companies, for financial reporting purposes, fully accrue
    estimated future DRR costs that represent fixed obligations in
    the year the obligations first arise, capitalize such costs into
    the bases of the related assets, and recover the costs through
    depreciation deductions over the productive lives of the assets.
    - 24 -
    expenses for estimated future DRR costs (including those relating
    to the Prudhoe Bay oil field) over the entire life of an oil
    field using the units-of-production method.
    Oil and gas companies, including Exxon, typically review and
    revise their estimates and depreciation rates relating to
    estimated future DRR costs throughout the life of a field.    Their
    financial income statements incorporate and reflect changes in
    DRR cost estimates relating to changes in technology, inflation,
    labor, equipment, and material rates.   When new facilities are
    installed, oil and gas companies reflect additional estimated DRR
    costs relating to the new facilities in their financial income
    statements as additional depreciation expenses.
    FAS 19 does not state that estimated future DRR costs should
    be reflected as a fixed capital liability on a company’s
    financial balance sheets.
    During the years in issue, consistent with FAS 19, Bulletin
    61 of Exxon’s financial accounting manual, “Accounting for Cost
    of Plant Removal and Site Restoration” relating to the accrual of
    DRR costs, provided as follows:
    Annual accruals [for future DRR] are to be
    provided only if both of the following conditions
    are met:
    1) The work must be required as the result of
    local laws or regulations, or as part of a
    contractual agreement.
    2) The nature of the work is such that it is
    possible to estimate its cost. Thus, the law or
    - 25 -
    agreement must specify the work to be performed or
    the conditions to be met.
    For the years in issue, Exxon, like most other oil and gas
    companies, did not recognize on its financial balance sheet
    statements estimated future DRR costs as a fixed liability.
    Rather, Exxon disclosed estimated future DRR costs in a note to
    its financial statements and, as required by FAS 19, reflected
    and claimed estimated future DRR costs relating to Prudhoe Bay
    and to its other oil and gas facilities in its annual
    depreciation calculations on its financial income statements.
    As indicated, during the years in issue, no PBU partnership-
    wide study was made of estimated future Prudhoe Bay DRR costs.
    Rather, each oil company, including Exxon, with a working
    interest in the PBU partnership generally developed its own
    estimate of future Prudhoe Bay DRR costs.
    Set forth in the schedule below for 1977 through 1988 are
    the amounts of its share of total future Prudhoe Bay DRR costs
    that, at the end of each year, were estimated by Exxon.   The
    amounts vary because of differences in methodology and
    assumptions that were used from year to year to estimate total
    future DRR costs.
    - 26 -
    Exxon’s Estimated Future
    Total Prudhoe Bay DRR Costs
    Year                      (Millions)
    1977                        $215
    1978                         215
    1979                         228
    1980                         122
    1981                         162
    1982                         180
    1983                         247
    1984                         300
    1985                         300
    1986                         333
    1987                         209
    1988                         209
    As indicated, in its financial income statements for each
    year, Exxon included a depreciation expense item relating to its
    share of the above estimated future Prudhoe Bay DRR costs.   On
    Exxon’s financial income statements for each year, the amount of
    the depreciation expense item reported for estimated Prudhoe Bay
    DRR costs was calculated roughly on the basis of the above
    estimates of total future Prudhoe Bay DRR costs and on the basis
    of the units of oil production that occurred in each year
    relative to Exxon’s estimates of total oil recovery that would
    occur at Prudhoe Bay over the projected life of the field,
    reflecting Exxon’s 22-percent interest in the PBU.
    Following FAS 19 and oil industry practice, however, on its
    annual financial balance sheet statements Exxon did not accrue as
    a fixed capital liability or cost any of the above estimated
    Prudhoe Bay DRR costs.   Rather, on such yearend financial balance
    sheet statements, the amount of the annual depreciation expense
    - 27 -
    relating to estimated future Prudhoe Bay DRR costs, which was
    reflected on Exxon’s income statements as an item of depreciation
    and charged to earnings, was credited to a “reserve” liability
    account.
    During the years in issue, for financial income statement
    and balance sheet reporting purposes, Exxon’s practice for the
    financial reporting of estimated future DRR costs was the same as
    that followed by a majority of oil and gas companies.
    Set forth in the section below (infra p. 30), is a schedule
    setting forth, among other things, the amount of estimated future
    PBU DRR costs that Exxon, in its financial income statements for
    each year, accrued as a depreciation expense and added to a
    liability reserve account.
    Exxon’s Federal Corporation Income Tax Returns and
    Now Proposed Tax Treatment of Estimated DRR Costs
    In preparing and filing its Federal corporation income tax
    returns for the years in issue, Exxon used the accrual method of
    accounting, and Exxon has consistently used the all-events test
    as the standard for determining when its liabilities accrue under
    the accrual method of accounting.
    On its consolidated Federal corporation income tax returns
    for the years in issue, Exxon accrued costs relating to its
    worldwide DRR obligations on the accrual method of accounting as
    its tax return preparers then understood the application to DRR
    costs of the all-events test of the accrual method of accounting.
    - 28 -
    That is, DRR costs, for Federal income tax return purposes, were
    accrued only when the related DRR work was performed and then as
    current business expenses.   As explained and as reflected in Rev.
    Rul. 80-182, 1980-
    2 C.B. 167
    , this was consistent with
    respondent’s interpretation of how the all-events test of the
    accrual method of accounting applied to DRR costs.
    Set forth below for each of the years 1977 through 1982 is a
    schedule that reflects the amount of estimated Prudhoe Bay DRR
    costs indicated:   (1) On Exxon’s financial balance sheet
    statements (as explained, estimated DRR costs were accrued on
    Exxon’s financial balance sheet statements not as a fixed
    liability cost but only in a footnote as a reserved liability);
    (2) on Exxon’s financial income statements (as explained,
    estimated future DRR costs were accrued on Exxon’s income
    statements as a depreciation expense based on units of oil
    production that occurred in each year); (3) on Exxon’s Federal
    income tax returns, as filed with respondent (as explained, on
    Exxon’s income tax returns DRR costs were not accrued until DRR
    work was performed and then as current business expenses); and
    (4) as now claimed by Exxon for Federal income tax purposes,
    namely, in the year Prudhoe Bay oil wells and the related
    equipment, facilities, and buildings were constructed, total
    estimated future Prudhoe Bay DRR costs would be capitalized and
    for each year related accelerated depreciation, investment tax
    - 29 -
    credits, and intangible drilling costs, or, alternatively,
    current business expense deductions would be claimed therefor.
    Exxon’s Accrual of Estimated Future PBU DRR Costs
    On Financial Statements           Tax Treatment
    On Income Statements
    As Depreciation      Current Expense   Would Now Capitalize
    On Balance   Expense & On Balance     On Tax Returns   & Claim Depreciation,
    Sheets     Sheets As Addition To      As Filed           ITC, & IDC, Or
    As Fixed     Reserved Liability     With Respondent      Current Expense
    For      Liability         (Millions)          (Thousands)           (Millions)
    1977          ---              $2.5                  -0-                $ 6.9
    1978          ---               4.2                $15,040               11.4
    1979          ---               6.1                  -0-                 11.8
    1980          ---               4.1                  -0-                 12.4
    1981          ---               5.2                  -0-                 13.7
    1982          ---               6.0                  -0-                 18.8
    In the 1980's, a Tax Court decision allowed, for Federal
    income tax purposes, the accrual of estimated future strip-
    mining land reclamation costs relating to underground mines.
    See Ohio River Collieries Co. v. Commissioner, 
    77 T.C. 1369
    (1981).      As a result, in the late 1980's, the PBU and the
    partners in PBU including Exxon raised in these pending cases
    with respondent via timely claims for refund the DRR cost
    accrual issue relating to estimated Prudhoe Bay DRR costs, as
    well as the accrual of estimated DRR costs for other projects
    throughout the world.
    As a result of such claims, with regard to oil company
    estimated DRR costs relating to underground mines, oil shale
    projects, and TAPS, respondent has allowed Exxon and other oil
    companies the tax accrual of estimated DRR costs.
    For the years in issue, with regard to estimated DRR
    costs relating to foreign offshore oil drilling platforms and
    - 30 -
    to Exxon’s oil wells located in the lower 48 States (as well
    as those relating to the Prudhoe Bay oil field), respondent
    continues to disallow the accrual of estimated DRR costs.
    With regard to the accrual of DRR costs relating to foreign
    offshore oil drilling platforms and to Exxon’s oil wells
    located in the lower 48 States, Exxon has withdrawn its claims
    for refund with regard thereto.
    In the referred-to claims for refund, the PBU and Exxon
    have raised the issue of whether they may accrue estimated DRR
    expenses relating to Prudhoe Bay beginning in 1977, the first
    year of the PBU partnership’s existence, and Exxon has pending
    refund claims on the issue beginning with each year of the PBU
    partnership.
    As explained, Exxon’s primary position in these cases is
    that estimated DRR costs relating to the oil-producing
    equipment and facilities located in the Prudhoe Bay field
    should be accruable, in the year such equipment and facilities
    are constructed and installed, as capital costs of the
    facilities and depreciated under the relevant tax depreciation
    system (for the years in issue--ADR and ACRS).   Further, with
    regard to estimated DRR costs that are capitalized and that
    relate specifically to oil wells and to cleanup of oil well
    sites, Exxon claims that investment tax credits under section
    38 and intangible drilling costs under section 263(c) should
    be allowed.
    - 31 -
    Alternatively, in the year the oil field equipment and
    facilities were constructed and installed, Exxon claims that
    estimated Prudhoe Bay DRR costs should be accruable under
    section 162 as ordinary and necessary business expense
    deductions.
    Exxon’s Estimates of Future PBU DRR Costs
    Exxon’s experts have made elaborate and detailed
    projections with regard to future DRR activity that may be
    undertaken in the Prudhoe Bay field and to estimated DRR costs
    that may be incurred with respect thereto.   In doing so, they
    claim that all facilities in Prudhoe Bay other than the
    Seawater Treatment Plant will be dismantled beginning in the
    year 2031 and that it will take 6 years to dismantle and
    remove the facilities and equipment from the North Slope of
    Alaska.
    Exxon estimates that a total of $928 million in DRR costs
    relating to the Prudhoe Bay oil-producing facilities will be
    incurred by the PBU partnership, and Exxon calculates that its
    share thereof will be approximately $204 million.
    - 32 -
    OPINION
    Accrual of DRR Costs Under the All-Events Test of Section 461
    For Federal income tax purposes during the years in
    issue, an accrual basis taxpayer generally may accrue costs
    not yet paid in the year in which the costs satisfy the two-
    pronged all-events test of the accrual method of tax
    accounting; i.e., in the year in which all the events occur
    that establish the fact of the taxpayer’s liability for the
    costs and in which the amount of the liability can be
    determined with reasonable accuracy.   See United States v.
    General Dynamics Corp., 
    481 U.S. 239
    , 243-244 (1987); United
    States v. Hughes Properties, Inc., 
    476 U.S. 593
    , 600 (1986);
    United States v. Anderson, 
    269 U.S. 422
    , 437-438 (1926); sec.
    1.446-1(c)(1)(ii), Income Tax Regs.
    As the Supreme Court has explained:
    It is fundamental to the “all events” test that,
    although expenses may be deductible before they have
    become due and payable, liability must first be
    firmly established. This is consistent with our
    prior holdings that a taxpayer may not deduct a
    liability that is contingent * * *. [United States
    v. General Dynamics Corp., supra at 243.]
    The all-events test also applies under section 1012 to
    the accrual into the tax bases of capital assets of estimated
    future capital costs.   See Denver & Rio Grande W. R.R. v.
    United States, 
    205 Ct. Cl. 597
    , 
    505 F.2d 1266
     (1974); La Rue
    v. Commissioner, 
    90 T.C. 465
     (1988); Seaboard Coffee Serv.,
    - 33 -
    Inc. v. Commissioner, 
    71 T.C. 465
    , 476 (1978); Lemery v.
    Commissioner, 
    52 T.C. 367
    , 377-378 (1969), affd. per curiam
    
    451 F.2d 173
     (9th Cir. 1971); Gibson Prods. Co. v. United
    States, 
    460 F. Supp. 1109
    , 1115 (N.D. Tex. 1978), affd. 
    637 F.2d 1041
     (5th Cir. 1981); sec. 1.461-1(a)(2), Income Tax
    Regs.    Herein, respondent disputes whether Exxon’s attempted
    accrual of estimated Prudhoe Bay DRR costs would satisfy
    either prong of the all-events test.
    The first prong of the all-events test looks only to
    whether the taxpayer’s fact of liability for the costs in
    question has been established.    This test may be satisfied
    even if it is not known when or to whom costs will be paid.
    See United States v. Hughes Properties, Inc., supra at 604;
    Valero Energy Corp. & Subs. v. Commissioner, 
    78 F.3d 909
    , 915
    (5th Cir. 1996), affg. 
    T.C. Memo. 1994-132
    .    A liability can
    be fixed even if there are procedural or ministerial steps
    that still have to occur before payment.    Accrual should be
    deferred if the occurrence of those steps is sufficiently
    uncertain that they render the taxpayer’s liability
    contingent.    See, e.g., Continental Tie & Lumber Co. v. United
    States, 
    286 U.S. 290
     (1932); United States v. Anderson, 
    supra.
    The mere speculative possibility that some future event
    will release the taxpayer from its liability does not prevent
    - 34 -
    accrual.   See, e.g., United States v. Hughes Properties, Inc.,
    supra at 601-602, 606.
    Exxon argues that the combination of the DL-1 Lease
    provisions, Alaska law, regulations, and oil industry
    practice, as of the end of each of the years 1979 through
    1982, establish the fixed and definite nature of Exxon’s
    future Prudhoe Bay DRR obligations regarding the entire
    Prudhoe Bay oil field.   The extent of the DRR obligations to
    which Exxon contends the PBU and the other oil companies
    became subject upon construction of the Prudhoe Bay oil wells
    and oil production facilities is summarized briefly by one of
    Exxon’s experts, as follows:
    PBU will have to plug all wells, close all reserve
    and containment pits, remove all above-ground
    pipelines and electrical lines, and remove all other
    structures, such as modular flow stations and
    gathering centers. The PBU Partners will have to
    dismantle, transport to barges, and transport off
    the North Slope the modules, pipelines, and
    electrical distribution systems, and leave the land
    in a clean and generally level condition. It is
    expected that Exxon and its PBU Partners will
    perform these DRR obligations around the year 2030.
    In comparing the language of the right-of-way agreements
    relating to TAPS and to the other North Slope pipelines
    involved in the FERC rate-making proceedings, on the one hand,
    to the language of the DL-1 Lease agreements, on the other,
    Exxon’s experts sense a common denominator or “idea” in the
    language of both sets of right-of-way agreements (namely, that
    - 35 -
    removal of the equipment and related DRR work is “required” in
    each instance).
    We note simply that specific language relating to oil
    company DRR obligations is found in the TAPS right-of-way
    agreements, but, as we have explained, is not found in the
    language and provisions of the DL-1 Leases that relate to
    fieldwide oil production facilities at Prudhoe Bay.
    Neither the language of paragraph 36 nor the language of
    paragraph 20 of the DL-1 Leases reflects fieldwide facility
    and equipment dismantlement, removal, or restoration
    obligations.   As we have explained, paragraph 36 is written in
    terms of a “privilege” of the oil companies to remove
    equipment if they so choose or of an “option” of Alaska to
    have the equipment removed if it so elects.   Paragraph 20
    refers only generally to waste and due diligence, to
    preservation of the land, and to plugging abandoned wells.
    Fixed obligations to dismantle, remove, and   restore the
    Prudhoe Bay fieldwide facilities and equipment are not
    reflected in the language of paragraph 20.
    Further, as we have found, and contrary to Exxon’s
    experts, AOGCC regulations in effect during the years in issue
    relate only to plugging, abandonment, and cleanup of oil well
    sites and do not apply to, and do not establish, DRR
    obligations of the PBU or of the oil companies to the
    - 36 -
    extensive Prudhoe Bay oil field equipment and facilities not
    located at oil well sites.
    Again, we note that the right-of-way leases relating to
    TAPS and the regulations relating to oil well drilling sites
    reflect express language that imposes DRR obligations on the
    oil companies.    The DL-1 Leases and the Alaska regulations,
    however, contain no such express language imposing fixed and
    definite DRR obligations on the oil companies relating to
    fieldwide    production facilities located in the Prudhoe Bay
    oil field.
    We believe the differences in language relating to DRR
    obligations are significant for purposes of the all-events
    test of the accrual method of accounting.    We believe that
    specific DRR obligations relating to fieldwide oil production
    facilities could have been reflected in the DL-1 Leases or in
    the Alaska regulations were such obligations intended.
    Specific DRR language was used in the TAPS right-of-way
    provisions.    No adequate explanation has been provided as to
    why specific language relating to DRR obligations of the PBU
    and of the oil companies relating to fieldwide DRR was not set
    forth either in the DL-1 Leases or in the Alaska regulations,
    other than that such DRR obligations with regard thereto, as
    of the years in issue, were not established.
    As the current Commissioner of the Department of Natural
    Resources for the State of Alaska acknowledged in his trial
    - 37 -
    testimony herein, as late as 1997 no Alaska regulations
    specifically covered Prudhoe Bay fieldwide DRR obligations of
    the oil companies.   He testified as follows:
    Question. So in June of 1994, your Deputy
    Commissioner said there was no established policy on
    DRR and in June of 1997 you said there is no fixed
    policy on DRR but now you are claiming on the
    witness stand that there is, is that correct?
    Answer. I’m not claiming there is a policy. I am
    claiming there’s an expectation. We do not have a
    policy written in regulation about lease closure and
    how we go about lease closure. This has been a
    general concern of the industry that goes well
    beyond this case, and the purpose of my memorandum
    to the staff was to continue work that had begun
    earlier on such a policy.
    However, we have certainly in the lease and, I
    think, in a variety of other arenas stated our
    expectations of the industry, and I think those
    expectations show very high standards in terms of
    environmental cleanup.
    Question. But those expectations are not stated in any
    regulation or official ruling, is that correct?
    Answer.   That is correct.
    The 1979 joint Federal-State commission that studied
    Alaska land use issues and that concluded that development
    activities in the North Slope should not irreversibly damage
    the environment and that the environment should be “capable”
    of restoration upon completion of development activities
    imposed no fixed and definite DRR obligations on Exxon.     An
    “expectation” of and the “capability” of restoration do not
    necessarily require restoration.
    - 38 -
    Exxon placed in evidence the extensive history, during
    the 1960's through the present, of the State of Alaska’s
    supervision of oil company abandonment and cleanup operations
    of numerous North Slope exploratory well sites.   Exxon
    emphasizes and argues that such history and practice and the
    AOGCC regulations (relating to abandonment of wells and to
    cleanup of well sites) together establish affirmative DRR
    obligations of the oil companies for all of the massive
    equipment and facilities located in the entire Prudhoe Bay oil
    field.   One of Exxon’s experts states in his report as
    follows:
    The AOGCC’s record of strict enforcement of cleanup
    requirements [for well locations] over the last
    thirty-one years * * * evidences the State’s
    commitment to having its lands returned in good
    order and condition
    * * *. [Emphasis added.]
    We reject the equation, if that is what is intended by
    Exxon’s expert, between well sites and the balance of the “lands”
    constituting the Prudhoe Bay oil field.
    Recognizing the dispute between Exxon and respondent over
    alleged differences between well sites and the balance of the
    Prudhoe Bay oil field, Exxon’s expert comments as follows:
    It is not necessary to resolve the issue of what
    constitutes a “location” to understand that the cleanup
    requirements of paragraph 20, the AOGCC regulations,
    and the consistent, virtually uniform pattern of
    enforcement over many years, collectively illustrate
    - 39 -
    the type of standards which will be applicable to final
    cleanup at the PBU. Far from the AOGCC regulations
    being somehow distinct and inapplicable, there is every
    reason to conclude that the State of Alaska will
    enforce DRR obligations under State leases consistent
    with the approach applied under these regulations.
    To the contrary, “expectations” or reasonable and probable
    “predictions” on the part of Alaska government officials and
    Exxon’s experts regarding what eventually may be required from
    the oil companies in the way of Prudhoe Bay fieldwide DRR do not
    provide a sufficiently fixed and definite basis on which to base
    the tax accruals sought herein.    During the years before us, such
    expectations and predictions simply do not satisfy the all-events
    test of section 461.   They do not rise to the level of fixed and
    definite legal obligations.
    The fact that Exxon annually on its financial income
    statements accrued a depreciation deduction for DRR costs based
    on units of oil produced each year does suggest, as Exxon argues,
    that Exxon’s management considered some accrual of estimated
    Prudhoe Bay DRR costs appropriate and consistent with Exxon’s
    financial accounting policies and with generally accepted
    financial accounting principles.   As explained, under FAS 19 oil
    companies are required to accrue as an expense future DRR costs
    where the company is under an existing obligation to incur such
    costs and where such future DRR costs can be estimated with
    reasonable accuracy.
    - 40 -
    The rules of financial accounting and a company’s financial
    treatment of such costs, however, whether correct or incorrect
    thereunder are not controlling for Federal income tax purposes.
    See Thor Power Tool Co. v. Commissioner, 
    439 U.S. 522
    , 540
    (1979).    We also note that Exxon, for financial reporting
    purposes, did not on its financial balance sheets (as
    distinguished from its financial income statements) accrue any
    fixed liability relating to estimated DRR obligations at Prudhoe
    Bay.
    Exxon argues strenuously that respondent’s position, under
    which no tax accrual would be allowed for estimated future
    Prudhoe Bay DRR costs, produces a fundamental and gross mismatch
    of Exxon’s income and expenses relating to Prudhoe Bay oil
    recovery.    Under the matching principle of Federal income tax
    accounting, however, only those obligations are to be recognized
    that are properly accruable (i.e., that satisfy the all-events
    test).    To allow estimated costs of obligations that do not
    satisfy the all-events accrual test (such as the majority of the
    estimated DRR costs involved herein) to be accrued and to offset
    current income is not part of the matching principle.
    Further, Alaska’s general policy under its constitution for
    management of Alaska lands (to permit development while at the
    same time insisting that the environment be preserved or, if
    necessary, restored to the fullest reasonable extent) does not
    establish any specific oil company DRR obligations with regard to
    - 41 -
    Prudhoe Bay that may be legally recognized for Federal income tax
    purposes.
    DRR Obligations Relating Specifically to
    Well Plugging and to Well-Site Cleanup
    Contrary to our holding regarding fieldwide Prudhoe Bay DRR,
    we believe Exxon’s Prudhoe Bay DRR obligations relating
    specifically to oil wells and to oil well sites are clearly set
    forth and established in the provisions of the DL-1 Leases and
    satisfy the first prong of the all-events test of the accrual
    method of accounting.   Paragraph 20 expressly states that upon
    closing down wells, Exxon is to plug the wells and abide by
    Alaska regulations relating to such plugging.   For the years in
    issue, Alaska regulations similarly required oil companies to
    plug and to clean up well drilling sites.
    Respondent argues that the filing of a “notice of
    abandonment” of the wells constitutes a condition precedent to
    the recognition of any firm oil company DRR obligations.   Also,
    respondent argues that DRR technology and Alaska regulations
    regarding well plugging and well-site cleanup may be changed by
    the time the wells in the Prudhoe Bay field are to be plugged by
    the oil companies, making all DRR work that the oil companies
    might have to perform in Prudhoe Bay indefinite and speculative.
    We disagree.   We regard the notice of abandonment provision of
    the DL-1 Leases as ministerial and perfunctory, certainly not a
    condition precedent to DRR obligations relating to the wells
    - 42 -
    which obligations came into existence when the wells were
    drilled.   As Exxon on brief explains:
    it is preposterous to think that Exxon could avoid
    having to plug wells simply by refusing to file a
    notice of abandonment. * * * Filing the notice is just
    a step in performing the well plugging obligation
    already imposed by Paragraph 20 of the lease.
    Further, in the oil industry, oil well plugging and site
    cleanup relating thereto are common events.   Although variations
    in plugging procedures may occur, we believe sufficient oil
    industry experience and practice are established with regard to
    the frequent procedure of well plugging and well-site cleanup
    that possible changes in technology and Alaska regulations do not
    render Exxon’s Prudhoe Bay DRR obligations with regard thereto
    indefinite and contingent.
    Respondent contends that Exxon’s well-site DRR obligations
    should not be regarded as fixed because of the possibility that
    Exxon might surrender or assign its interest in PBU, along with
    the related DRR obligations, to some other oil company.   The mere
    possibility of assignment, however, is not sufficient to prevent
    tax accrual because the same argument could be made with respect
    to every fixed liability that a taxpayer otherwise would accrue.
    In any event, the PBU partners are not permitted to assign their
    interests in the PBU without approval from Alaska, and the State
    would not approve an assignment that would ignore the well
    plugging and well-site DRR obligations.   Further, the Unit
    - 43 -
    Agreement does not allow an owner to avoid its DRR obligations by
    transferring its ownership interest in PBU.
    The Reasonableness of Exxon’s $24 Million Estimate for
    Prudhoe Bay Well-Plugging and Other Well-Site DRR Costs
    Of the total $928 million estimated by Exxon’s experts for
    total fieldwide DRR costs, $111.6 million relates to well-site
    DRR costs--$85 million for plugging the 645 wells and $26.6
    million for closing the pits next to the wells and for cleaning
    up the 37 well sites.   We discuss below the reasonableness of
    Exxon’s estimate of $24 million (22 percent of $111.6 million)
    for its share of Prudhoe Bay well plugging and well-site cleanup,
    the only DRR costs that we have determined satisfy the first
    prong of the all-events test of the accrual method of accounting.
    Respondent claims that all of Exxon’s estimated Prudhoe Bay DRR
    costs are too remote and speculative, that they cannot be
    ascertained with reasonable accuracy, and therefore that they do
    not satisfy the second prong of the all-events accrual test.
    To protect against hydrocarbon leakage after abandonment of
    the wells, AOGCC regulations require that upon abandonment each
    well must be “plugged in a manner which will permanently confine
    all oil, gas, and water to the separate strata originally
    containing them.”   This procedure involves setting a series of
    cement plugs to seal the wells.   Exxon presented a cost-effective
    plan, which makes use of coiled tubing units, for setting such
    plugs.   Exxon’s plugging method achieves the regulatory
    - 44 -
    objectives of isolating the well substances within their separate
    strata and preventing the leakage of hydrocarbons after well
    abandonment.
    Exxon’s estimated DRR costs associated with plugging wells
    include wages, rental of equipment, supplies, and hauling of
    equipment and materials.
    We reiterate that in the oil industry well plugging and
    related site cleanup are common events.   As a general matter and
    based on such experience, the costs of such DRR work is
    reasonably estimable.
    John B. Willis, currently with Halliburton Energy Services,
    Inc., a leading oil well service company, prepared Exxon’s plan
    for and estimated the cost of plugging the Prudhoe Bay oil wells
    in 1970 and 1980 dollars at a total of $131,976 for each of the
    645 wells for which an estimate was done (reflecting total PBU
    estimated costs for well plugging of $85,124,800 of which Exxon’s
    22-percent share would be $18,727,456).   Mr. Willis supervised
    the drilling and plugging of wells at Prudhoe Bay during the
    1970's.   We accept Mr. Willis’ estimates of Exxon’s well-plugging
    costs for the Prudhoe Bay field.
    During the drilling of wells, mud is pumped into the well
    bore.   Mud and drill “cuttings” move to the surface as the wells
    are drilled and must be contained when they exit from the top of
    the wells.   To accomplish that containment, the PBU owners
    constructed “reserve pits” at the drill sites by enclosing a
    - 45 -
    portion of the tundra with gravel dikes or berms.    They
    constructed other pits, called “containment” and “flare” pits, to
    collect escaped hydrocarbons during oil production.
    The AOGCC regulations from the period at issue provided
    that, upon abandonment of wells, the pits at well sites must be
    filled and the well sites left in a clean and generally level
    condition.   Exxon’s plan for closing the pits upon abandoning and
    plugging the wells uses the so-called freeze-back-in-place
    method, which involves placing on each pit a 6-foot layer of
    gravel fill with a domed cap.    The insulating effect of the
    gravel cover keeps the waste located in the pits permanently
    frozen, thereby containing the waste in place.    During the years
    in issue, freeze-back in place represented an acceptable method
    of pit closure.
    Exxon’s estimated DRR costs associated with pit closures
    include wages, fuel, rental of equipment, supplies, and hauling
    of gravel and equipment.
    Charles E. Wilson, a civil engineer and employee of Harding
    Lawson Associates, a large environmental remediation and civil
    engineering firm with an Anchorage office, developed Exxon’s pit
    closure plan and estimated the related DRR costs.    Mr. Wilson is
    experienced in closing pits and moving gravel on the North Slope.
    Mr. Wilson estimated total PBU pit closing costs in the
    Prudhoe Bay field in 1970 and 1980 dollars to be $152,720 for
    each of the 174 pits for which an estimate was done (for a total
    - 46 -
    cost for all of the Prudhoe Bay pits of $26,573,366, of which
    Exxon’s 22-percent share would be $5,846,141).   We accept
    Mr. Wilson’s estimates of Exxon’s pit closing costs for the
    Prudhoe Bay field.
    We conclude that $24 million for Exxon’s share of the costs
    of Prudhoe Bay well-site DRR represents, as of the end of the
    years in issue, a reasonable estimate of such future costs.5
    5
    Obviously, the specific years in which wells are
    constructed would control the specific year in which related
    estimated well-site DRR costs would be accrued, subject to
    resolution of the remaining issues herein.
    - 47 -
    Accrual of Estimated Prudhoe Bay Well-Site DRR Costs as
    Capital Costs or as Current Business Expenses
    Although we are satisfied that Exxon’s attempted accrual of
    $24 million in estimated DRR costs relating to Prudhoe Bay well
    plugging and well-site cleanup would satisfy the all-events test
    of the accrual method of accounting, respondent argues that Exxon
    may not, without respondent’s permission, accrue such $24 million
    into the tax bases of its share of Prudhoe Bay capital asset
    costs and claim thereon accelerated depreciation, investment tax
    credits (ITC), and intangible drilling costs (IDC).   We agree
    with respondent.
    We believe that Exxon’s claim to such capitalization,
    accelerated depreciation, ITC, and IDC constitutes a substantial
    deviation from the current ordinary business expense treatment of
    Prudhoe Bay well-site DRR costs (at the time of performance of
    related DRR work) that Exxon has been using on its Federal
    corporation income tax returns as filed and that such a change
    would constitute a “change” in Exxon’s method of accounting for
    DRR costs for which respondent’s permission is required.   See
    sec. 446(e), particularly the last sentence of sec. 1.446-
    1(e)(2)(ii)(b), and (3)(i), Income Tax Regs.   Not having obtained
    such permission and absent a finding herein that respondent
    abused his discretion in not granting such permission, Exxon is
    not allowed to accrue estimated Prudhoe Bay well-site DRR costs
    into the capital cost bases of the wells and the well-site
    - 48 -
    equipment and to claim accelerated depreciation, ITC, and IDC
    relating thereto.   We find no abuse in respondent’s refusal to
    authorize this change in the accrual of Exxon’s DRR costs.
    The question remains as to whether Exxon should be allowed
    its alternative claim to accrue the estimated $24 million in
    well-site DRR costs (that we have concluded satisfy the all-
    events test) as current ordinary and necessary business expenses
    in the year in which oil wells are drilled.   Treating such DRR
    costs as ordinary business expenses would be consistent with
    Exxon’s tax return treatment under which such expenses were so
    accrued--albeit in the year in which the DRR work was performed.
    The proposed modification to Exxon’s accrual as ordinary
    business expenses of estimated well-site DRR costs (from the
    year in which the related DRR work is performed to the year in
    which wells are drilled and the DRR obligation first becomes
    fixed) arguably, as Exxon asserts, would constitute a mere
    “correction” in the application of the all-events test to such
    costs (namely, the costs would be regarded as being fixed and
    reasonably estimable--and therefore as satisfying the all-events
    test--in the years the wells are drilled, rather than in later
    years in which the DRR work is performed).
    Section 1.446-1(e)(2)(ii)(b), Income Tax Regs., provides,
    among other things, that a mere technical “correction” in the
    application of a taxpayer's existing method of accounting for the
    same or similar items may be made without obtaining respondent’s
    - 49 -
    permission.   For examples of situations where certain
    modifications in the accrual of items under the all-events test
    were held to constitute not “changes” in methods of accounting
    for such items but mere “corrections” in the application to such
    items of the all-events test of the accrual method of accounting
    (for which corrections respondent’s permission was not required)
    see Northern States Power Co. v. United States, 
    151 F.3d 876
    ,
    883-885 (8th Cir. 1998); Gimbel Bros., Inc. v. United States, 
    210 Ct. Cl. 17
    , 
    535 F.2d 14
    , 21-23 (1976); Standard Oil Co. v.
    Commissioner, 
    77 T.C. 349
    , 381-383 (1981).
    In Ohio River Collieries Co. v. Commissioner, 
    77 T.C. 1369
    (1981), we recognized that under the all-events test accrual of
    estimated strip-mining reclamation costs as ordinary and
    necessary business expenses may be appropriate in the year the
    land is disturbed, rather than in the year the reclamation work
    is performed.   Arguably, in light of that case, Exxon’s attempted
    modification to the accrual of estimated DRR costs from the year
    DRR work is performed to the year in which wells are drilled
    would qualify as a mere correction in Exxon’s method of
    accounting for such well-site DRR costs for which respondent’s
    permission would not be required.   In light, however, of our
    resolution of the next issue we need not, and we do not, decide
    this issue.
    Distortion of Income
    - 50 -
    Respondent argues that Exxon’s alternative accrual as
    ordinary business expenses in the year wells are drilled of the
    $24 million in estimated Prudhoe Bay well-site cleanup costs
    (that we determine satisfy the all-events test of the accrual
    method of accounting) would distort Exxon’s income.   Exxon
    responds that under its alternative claim to currently expense
    estimated Prudhoe Bay DRR costs its income would not be distorted
    for Federal income tax purposes.
    Section 446(b) grants respondent broad discretion to
    determine whether a particular method of accounting clearly
    reflects income and to impose such method of accounting as in
    respondent’s opinion does clearly reflect income.   Respondent’s
    determination is to be respected unless it is found to be an
    abuse of discretion.   See Thor Power Tool v. Commissioner, 
    439 U.S. 522
    , 532 (1979); Ford Motor Co. v. Commissioner, 
    71 F.3d 209
    , 212 (6th Cir. 1995), affg. 
    102 T.C. 87
     (1994); Prabel v.
    Commissioner, 
    882 F.2d 820
    , 823 (3d Cir. 1989), affg. 
    91 T.C. 1101
     (1988).
    Herein, under Exxon’s alternative claim, Exxon would fully
    write off $24 million in estimated well-site DRR costs
    immediately in the years wells in the Prudhoe Bay oil field were
    drilled.   Such current expense treatment would be unrelated to
    the years thereafter in which oil production from the wells
    occurred and income from sale of the oil was realized and
    - 51 -
    unrelated to the years in which oil production ceases, the wells
    are plugged, and DRR costs are incurred.
    We sustain respondent’s determination that Exxon’s attempted
    accrual of $24 million in estimated well-site DRR costs as
    current business expenses in the years wells are drilled would
    result in a distortion of Exxon’s income.
    Decisions will be entered
    under Rule 155.