<Page>
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                   FORM 8-K/A

                                 AMENDMENT NO. 2

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934



                Date of Report (Date of earliest event reported):
                         May 24, 2002 (August 10, 2001)


                           MARKWEST HYDROCARBON, INC.
             (Exact name of registrant as specified in its charter)


           DELAWARE                      1-11566                84-1352233
(STATE OR OTHER JURISDICTION OF     (Commission File         (I.R.S. EMPLOYER
 INCORPORATION OR ORGANIZATION)          Number)            IDENTIFICATION NO.)


                       155 Inverness Drive West, Suite 200
                             DENVER, COLORADO 80112
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)


                                 (303) 290-8700
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)

===============================================================================

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ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS.

(a)  AUDITED FINANCIAL STATEMENT OF BUSINESS ACQUIRED.

On August 10, 2001, MarkWest Hydrocarbon, Inc. completed an acquisition of 100%
of the stock of two privately-owned independent exploration and production
companies - Leland Energy Canada Ltd. and Watford Energy Ltd. (combined as
"Leland/Watford" herein), both headquartered in Calgary, Alberta, Canada.
Combined Leland/Watford was acquired for approximately $50 million (U.S.). A
Current Report on Form 8-K was filed on August 27, 2001. Audited combined
financial statements for Leland/Watford as of and for the periods ended December
31, 1999 and 2000 and unaudited combined financial statements for the six months
ended June 30, 2000 and 2001 follow.

                                       2
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AUDITORS' REPORT TO THE DIRECTORS


We have audited the combined balance sheets of the Leland/Watford Group, as
defined in note 1(a), as at December 31, 2000 and 1999 and the combined
statements of operations, Group's equity and cash flows for the periods ended
December 31, 2000 and 1999. These financial statements are the responsibility of
the Group's management. Our responsibility is to express an opinion on these
financial statements based on our audits.

With respect to the combined financial statements for the period ended December
31, 2000, we conducted our audit in accordance with Canadian generally accepted
auditing standards and United States generally accepted auditing standards. With
respect to the combined financial statements for the period ended December 31,
1999, we conducted our audit in accordance with Canadian generally accepted
auditing standards. Those standards require that we plan and perform an audit to
obtain reasonable assurance whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation.

In our opinion, these combined financial statements present fairly, in all
material respects, the financial position of the Group as at December 31, 2000
and 1999 and the results of its operations and its cash flows for the periods
ended December 31, 2000 and 1999, in accordance with Canadian generally accepted
accounting principles.

Canadian generally accepted accounting principles vary in certain significant
respects from accounting principles generally accepted in the United States.
Application of accounting principles generally accepted in the United States
would have affected results of operations for the periods ended December 31,
2000 and 1999, to the extent summarized in note 10 to the combined financial
statements.


/s/ KPMG LLP

Chartered Accountants


Calgary, Canada
October 19, 2001


                                       3
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                              FINANCIAL STATEMENTS


LELAND/WATFORD GROUP
Combined Balance Sheets

December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

<Table>
<Caption>
                                               2000              1999
                                            -----------      -----------
                                                       
Assets

Current assets:
     Cash and short-term investments        $ 7,979,602      $        --
     Accounts receivable                      6,577,685        2,868,988
     Prepaid expenses                           449,615          178,376
     Due from related parties (note 4)               --           44,386
                                            -----------      -----------
                                             15,006,902        3,091,750

Capital assets (note 2)                      16,661,934       13,408,007
                                            -----------      -----------
                                            $31,668,836      $16,499,757
                                            ===========      ===========
Liabilities and Group's Equity

Current liabilities:
     Accounts payable                       $ 6,265,131      $ 4,419,808
     Income taxes payable                     1,836,953               --
     Bank indebtedness (note 3)                 575,000          549,235
     Due to related parties (note 4)          6,185,301               --
                                            -----------      -----------
                                             14,862,385        4,969,043

Site restoration (note 2)                        71,700           22,260

Future income taxes (note 6)                  5,023,369          110,322

Group's equity (notes 1(a) and 5)            11,711,382       11,398,132

Subsequent events (notes 5, 8 and 9)
Commitments (note 8)
                                            -----------      -----------
                                            $31,668,836      $16,499,757
                                            ===========      ===========
</Table>

See accompanying notes to combined financial statements.

                                       4
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LELAND/WATFORD GROUP
Combined Statements of Operations

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

<Table>
<Caption>
                                                       2000                1999
                                                   ------------       ------------
                                                                
Revenues:
     Petroleum and natural gas sales               $ 21,422,509       $  5,990,177
     Royalties                                       (4,437,053)        (1,211,253)
                                                   ------------       ------------
                                                     16,985,456          4,778,924

Expenses:
     Production                                       2,420,239          1,255,678
     General and administration                       1,520,884            898,057
     Depletion, depreciation and amortization         2,778,187            858,762
                                                   ------------       ------------
                                                      6,719,310          3,012,497

Earnings before other items and income taxes         10,266,146          1,766,427

Other income (expense) items:
     Gain on sale of partnership (note 1(a))          8,679,640                 --
     Interest and other income                          491,056            353,263
     Interest expense                                   (60,038)            (1,576)
                                                   ------------       ------------
                                                      9,110,658            351,687

Income taxes (note 6)
     Current                                          1,836,953                 --
     Future                                           4,913,047            110,322
                                                   ------------       ------------
                                                      6,750,000            110,322
                                                   ------------       ------------
Net earnings                                       $ 12,626,804       $  2,007,792
                                                   ============       ============
</Table>

See accompanying notes to combined financial statements.

                                       5
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LELAND/WATFORD GROUP
Combined Statements of Group's Equity

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

<Table>
<Caption>
                                                      RETAINED          PARTNERS'           SHARE
                                                 EARNINGS (DEFICIT)      EQUITY             CAPITAL             TOTAL
                                                 -----------------     ------------       ------------       ------------
                                                                       (note 1(a))         (note 5)
                                                                                                 
Balance, January 1, 1999                            $         --       $         --       $         --       $         --
     Issuance of share capital                                --                 --                120                120
     Capital contributions                                    --          9,390,220                             9,390,220
     Net earnings (loss)                                 (76,864)         2,084,656                 --          2,007,792
                                                    ------------       ------------       ------------       ------------
Balance, December 31, 1999                               (76,864)        11,474,876                120         11,398,132
                                                    ------------       ------------       ------------       ------------

     Issuance of share capital                                --                 --                250                250
     Re-purchase of share capital                             --                 --               (116)              (116)
     Net earnings                                     11,304,382          1,322,422                            12,626,804
     Capital dividends paid                           (3,729,167)                --                 --         (3,729,167)
     Allocation and distribution of
       accumulated earnings of the partnership
       on the sale of the partnership                    851,769         (3,407,078)                --         (2,555,309)
     Distributions to related parties on
       the sale of the partnership                       (59,867)        (5,969,345)                --         (6,029,212)
     Allocation of partners' equity to share
       capital through the transfer of net
       assets                                                 --         (3,420,875)         3,420,875                 --
                                                    ------------       ------------       ------------       ------------
Balance, December 31, 2000                          $  8,290,253       $         --       $  3,421,129       $ 11,711,382
                                                    ============       ============       ============       ============
</Table>

See accompanying notes to combined financial statements.

                                       6
<Page>

LELAND/WATFORD GROUP
Combined Statements of Cash Flows

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

<Table>
                                                                  2000               1999
                                                              ------------       ------------
                                                                           
Cash provided by (used in):

Operations:
     Net earnings                                             $ 12,626,804       $  2,007,792
     Items not involving cash:
         Gain on sale of partnership                            (8,679,640)                --
         Depletion, depreciation and amortization                2,778,187            858,762
         Future income taxes                                     4,913,047            110,322
                                                              ------------       ------------
                                                                11,638,398          2,976,876
   Change in non-cash operating working capital (note 7)        (2,208,870)           434,444
                                                              ------------       ------------
                                                                 9,429,528          3,411,320

Financing:
     Distributions on the sale of partnership                   (8,584,521)                --
     Change in due to/from related parties                       6,229,687            (44,386)
     Capital dividends paid                                     (3,729,167)                --
     Increase in bank indebtedness                                  25,765            549,235
     Issuance of share capital                                         250                120
     Re-purchase of share capital                                     (116)                --
     Capital contributions                                              --          9,390,220
                                                              ------------       ------------
                                                                (6,058,102)         9,895,189

Investing:
     Capital asset additions                                   (18,153,072)       (14,244,509)
     Partner's interest in capital assets on the
       sale of the partnership                                   9,127,156                 --
     Proceeds on the sale of partnership                        11,722,882                 --
     Change in non-cash working capital relating to
       investing (note 7)                                        1,911,210            938,000
                                                              ------------       ------------
                                                                 4,608,176        (13,306,509)

Increase in cash and short-term investments                      7,979,602                 --

Cash and short-term investments, beginning of period                    --                 --
                                                              ------------       ------------
Cash and short-term investments, end of period                $  7,979,602       $         --
                                                              ============       ============
</Table>

See accompanying notes to combined financial statements.


                                       7
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

GENERAL:

     The Leland/Watford Group (the "Group") is comprised of various entities
     (see note 1(a)) that are engaged in the exploration for and development and
     production of crude oil and natural gas.

1.   SIGNIFICANT ACCOUNTING POLICIES:

     (a)  Basis of presentation:

          The combined financial statements of the Group comprise all of the
          accounts of the following entities for the period beginning with the
          later of the incorporation or formation date of the entity or the
          start of the calendar year as detailed below:

<Table>
<Caption>
                                                PERIOD ENDED                               PERIOD ENDED
                                              DECEMBER 31, 2000                          DECEMBER 31, 1999
- -------------------------------------------------------------------------------------------------------------------
                                                                          

(1)  Leland Energy Canada Ltd.          April 20, 2000 to December 31, 2000     N/A

(2)  Brian Hiebert Energy Limited       Year ended December 31, 2000            December 22, 1999 to
                                                                                  December 31, 1999

(3)  Guy Grierson Energy Limited        Year ended December 31, 2000            Year ended December 31, 1999

(4)  Gord Maybee Energy Limited         Year ended December 31, 2000            Year ended December 31, 1999

(5)  Ian de Bie Energy Limited          Year ended December 31, 2000            Year ended December 31, 1999

(6)  E. Hiebert Energy Limited          Year ended December 31, 2000            December 23, 1999 to
                                                                                  December 31, 1999

(7)  R. Grierson Energy Limited         Year ended December 31, 2000            December 23, 1999 to
                                                                                  December 31, 1999

(8)  P. Maybee Energy Limited           Year ended December 31, 2000            December 23, 1999 to
                                                                                  December 31, 1999

(9)  K. de Bie Energy Limited           Year ended December 31, 2000            December 23, 1999 to
                                                                                  December 31, 1999

(10) Hiebert Watford Holdings Ltd.      March 3, 2000 to December 31, 2000      N/A

(11) Grierson Watford Holdings Ltd.     Year ended December 31, 2000            December 22, 1999 to
                                                                                  December 31, 1999

(12) Maybee Watford Holdings Ltd.       March 3, 2000 to December 31, 2000      N/A

(13) de Bie Watford Holdings Ltd.       Year ended December 31, 2000            December 22, 1999 to
                                                                                  December 31, 1999

(14) Watford Energy Ltd.                July 12, 2000 to December 31, 2000      N/A


(15) Leland Energy Limited Partnership  January 1, 2000 to April 30, 2000       March 1, 1999 to
                                                                                  December 31, 1999

(16) Hiebert Resources Ltd.             Year ended December 31, 2000            Year ended December 31, 1999

(17) Grierson Resources Ltd.            Year ended December 31, 2000            Year ended December 31, 1999

(18) Maybee Resources Ltd.              Year ended December 31, 2000            May 19, 1999 to
                                                                                  December 31, 1999

(19) Wild River Resources Ltd.          Year ended December 31, 2000            Year ended December 31, 1999
</Table>

                                       8
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)


1.   SIGNIFICANT ACCOUNTING POLICIES (CONTINUED):

     (a)  Basis of presentation (continued):

          General

          The combined financial statements have been prepared to meet the needs
          of MarkWest Acquisitions Corp., the purchaser of the Group (see note
          9), in satisfying its filing requirements with the United States
          Securities and Exchange Commission.

          The combined financial statements of the Group have been prepared on a
          basis that the Group's management believes to be reasonable and
          appropriate and reflect the financial position, results of operations
          and cash flows of businesses that comprise the above-noted entities
          that comprise the Group, with all significant intragroup transactions
          and balances eliminated. The combined financial statements include the
          results of operations of the Leland Energy Limited Partnership (the
          "Partnership"), an entity that was owned 25% collectively by Hiebert
          Resources Ltd., Grierson Resources Ltd., Maybee Resources Ltd. and
          Wild River Resources Ltd. and owned 75% by Kaiser Energy Ltd., a
          company controlled by the controlling shareholder of Leland Energy
          Canada Ltd. During the year ended December 31, 2000, the Partnership
          distributed certain of its net assets with a net book value totaling
          $3,569,044 to the partners. The Partnership was then subsequently
          sold, which resulted in a gain totaling $8,679,640 for those entities
          included within the Group that collectively owned 25% of the
          Partnership. Kaiser Energy Ltd. then transferred its 75% share of the
          net assets distributed to Leland Energy Canada Ltd. by issuing 20,333
          Class A common shares with a book value aggregating $3,420,875 (see
          note 5). As the results of operations of the Partnership ultimately
          flowed directly to the individual partners, these combined financial
          statements reflect an adjustment both on the distribution of the net
          assets of the Partnership to the partners and the allocation of the
          partner's equity on its disposition.

          The combined financial statements of the Group reflect the operations
          of the Partnership prior to its disposition effective April 30, 2000.
          As the Partnership was ultimately owned 75% by an entity which was not
          acquired by MarkWest Hydrocarbon, Inc. (MWH), both the gain on sale of
          the Partnership and the percentage of partner's equity that related to
          Kaiser Energy Limited's ownership interest was not reflected within
          the combined financial statements of the Group. The combined financial
          statements do reflect the distribution of net assets from the
          Partnership to the individual partners, based upon the carrying values
          of the net assets.

          Transactions

          The Group acquired by MarkWest Hydrocarbon (MWH) is a group of
          companies involved in the exploration, development and production of
          oil and gas in western Canada under common management and control.
          Management of the Group consisted of four individuals being: 1) Guy
          Grierson, 2) Brian Hiebert, 3) Gord Maybee and 4) Ian de Bie
          (collectively the "Management") who were also shareholders of various
          companies comprising the Group.

          The Group began operations effective March 1, 1999 with the formation
          of the Leland Energy Limited Partnership (the "Partnership"). The
          Partnership was 25% owned by the Management's individual holding
          companies being: 1) Grierson Resources Ltd., 2) Hiebert Resources
          Ltd., 3) Maybee Resources Ltd., 4) Wild River Resources Ltd.
          (collectively the "Resource Companies"). The remaining 75% interest in
          the Partnership was owned by Leland Energy Ltd., the general partner
          and a wholly-owned subsidiary of

                                       9
<Page>

          Kaiser Energy Ltd. The individuals comprising the Management were not
          related in any way with either Leland Energy Ltd. and/or Kaiser Energy
          Ltd. The partners of the Partnership and Leland Energy Ltd. had no
          other operations except for the oil and gas operations conducted by
          the Partnership. During the year ended December 31, 1999 the
          Partnership acquired oil and gas assets located in Western Canada from
          arm's length parties and operated the properties until April 30, 2000,
          at which time the Partnership was sold to Gulf Canada Resources Ltd.

          Effective April 30, 2000 and immediately prior to the transfer of
          certain assets and liabilities out of the Partnership and the
          disposition of the Partnership, the assets and liabilities of the
          Partnership were as follows:

<Table>
                                                                 
               Cash                                                 $    289,988
               Accounts receivable                                     1,280,410
               Prepaid expenses                                          158,959
               Capital assets                                         17,046,463
               Accounts payable and accrued liabilities               (2,007,405)
               Long-term debt                                           (992,123)
               Site restoration liability                                (35,297)
                                                                    ------------
               Total net assets                                     $ 15,740,995
                                                                    ============
</Table>

          Immediately prior to the disposition, and as one of the conditions on
          the sale of the Partnership, the partners of the Partnership
          transferred all of the net assets and liabilities of the Partnership
          to the partners, except for capital assets totaling $12,169,541,
          representing the carrying value assigned to a property that was
          acquired by Gulf Canada Resources Limited and prepaid expenses
          totaling $2,410. These were the only assets left in the Partnership
          upon its disposition. The assets and liabilities of the Partnership
          were distributed to the partners before the disposition of the
          Partnership as the purchaser, Gulf Canada Resources Ltd., was only
          interested in acquiring one specific property but to facilitate income
          tax considerations for both the purchaser and seller, it was
          determined that selling the Partnership with only that property left
          was more advantageous then selling the property separately. The reason
          that the assets and liabilities were distributed/transferred out of
          the Partnership prior to its disposition is that each of the partners
          desired to continue in operation with the same assets, management and
          ownership structure as had existed under the Partnership. The carrying
          value of the assets and liabilities transferred out of the Partnership
          to the partners, based upon their percentage ownership in the
          Partnership, was as follows:

<Table>
                                                                 
               Cash                                                 $    289,988
               Accounts receivable                                     1,280,410
               Prepaid expenses                                          156,549
               Capital assets                                          4,876,922
               Accounts payable and accrued liabilities               (2,007,405)
               Long-term debt                                           (992,123)
               Site restoration liability                                (35,297)
                                                                    ------------
               Total net assets                                     $  3,569,044
                                                                    ============
</Table>

          The carrying value of the property retained in the Partnership on its
          disposition was determined based upon the percentage of future
          undiscounted revenues associated with the property that was left in
          the Partnership versus the Partnership's total future undiscounted
          revenues. As a result, the disposition of the Partnership, which was
          for gross cash proceeds totaling approximately $47,000,000, resulted
          in a gain totaling $34,718,560, after the deduction of various selling
          expenses. As the Resource Companies, which owned a 25% interest in the
          Partnership were among the entities acquired by MWH, the combined
          financial statements of the Group reflect their 25% in the gain which
          totaled $8,679,640. As Leland Energy Ltd. was not acquired by MWH, the
          gain relating to its 75% ownership interest in the Partnership was not
          reflected in the combined financial statements of the Group. As the
          transfer of the assets and liabilities of the

                                       10
<Page>

          Partnership prior to its disposition was conducted by entities under
          common management and control, the assets and liabilities were
          transferred at their carrying values and therefore no gain or loss was
          recognized.

          A description of the adjustments relating to the distribution of the
          assets and liabilities of the Partnership and the allocation of
          partner's equity is as follows:

          (a)  Kaiser Energy Ltd. transferred all of the net assets received
               upon the distribution by the Partnership to Leland Energy Canada,
               Ltd. and as consideration, received 20,333 Class A common shares.
               However, as the long-term debt of the Partnership was due to
               Kaiser Energy Ltd., Kaiser Energy Ltd. eliminated its share of
               the long-term debt and transferred the remaining net assets
               totaling $3,420,875 determined as follows: (75% x $3,569,044) +
               (75% x $992,123). As a result, Leland Energy Canada Ltd. recorded
               share capital totaling $3,420,875. As the distribution occurred
               between entities under common management and control, the
               transfer was conducted based upon the carrying values of the net
               assets transferred with no gain or loss recorded.

          (b)  As the earnings of the Partnership are reflected in the statement
               of operations, an adjustment was required to remove 75% of the
               accumulated earnings, which related to Kaiser Energy, Ltd., which
               was not acquired by MWH. As such, the accumulated earnings of the
               Partnership immediately prior to its disposition totaled
               $3,407,078, which was considered part of total partner's equity.
               Of this amount 25% ($851,769) was transferred to retained
               earnings and 75% ($2,555,309) as a reduction of Group's equity
               since this represented Kaiser Energy Ltd.'s, which was not
               acquired by MWH, share of the Partnership's earnings.

          (c)  Lastly, upon the sale of the Partnership, Kaiser Energy Ltd.
               received a return on capital totaling $5,969,345 relating to the
               contributions made to the Partnership by Kaiser Energy Ltd.

          Included in the December 31, 1999 Combined Statement of Operations are
          revenues and operating income (revenues less royalties and operating
          costs) of $676,136 and $519,080 respectively, attributable to the
          property sold to Gulf Canada Resources Ltd. For the year ended
          December 31, 2000, the revenues and operating income amounts included
          are $803,245 and $640,144 , respectively.

          From May 1, 2000 to June 30, 2000, management continued to operate
          their collective 25% ownership interest in the remaining oil and gas
          assets through the Resource Companies. On July 1, 2000, Management
          transferred their respective 25% ownership in the remaining oil and
          gas assets to eight successor companies being: 1) Guy Grierson Energy
          Ltd., 2) R. Grierson Energy Ltd., 3) Brian Hiebert Energy Ltd., 4) E.
          Hiebert Energy Ltd., 5) Gord Maybee Energy Ltd., 6) P. Maybee Energy
          Ltd., 7) Ian de Bie Energy and 8) K. de Bie Energy Ltd (collectively
          the "Energy Companies"). The Energy Companies were owned and
          controlled by the individuals comprising the Management and their
          respective spouses. With respect to the 75% interest in the remaining
          oil and gas assets transferred to Leland Energy Ltd., effective May 1,
          2000 this interest was transferred, in entirety, to Leland Energy
          Canada Ltd. As with the Resource Companies, the operations of the
          Energy Companies and Leland Energy Canada Ltd. solely related to the
          exploration, development and production of the oil and gas assets
          transferred from the Partnership. As all transfers of assets and
          liabilities were conducted between entities under both common
          management and common control, the transfers were recorded at their
          carrying values with no gain or loss on transfer recorded.

          Effective July, 2000 the individuals comprising the Management started
          another company to conduct oil and gas operations, also in Western
          Canada, under the name of Watford Energy Ltd. The individuals of the
          Management held their ownership interest in Watford Energy Ltd.
          through individual holding companies being: 1) Grierson Watford
          Holdings Ltd., 2) Hiebert Watford Holdings Ltd., 3) Maybee Watford
          Holdings Ltd. and 4) de Bie Watford Holdings Ltd. (collectively the
          "Watford Companies"). These operations were run from the same offices
          and by the same people as the Partnership; the only difference being
          that Kaiser Energy Ltd. and/or affiliates had no ownership interest in
          Watford Energy Ltd. or its assets.

                                       11
<Page>

          The acquisition by MWH of the Group consisted of all of the oil and
          gas assets owned by the Management, through their respective ownership
          in the Energy Companies and the Watford Companies, and Leland Energy
          Canada Ltd. There is no relationship between the purchaser, Gulf
          Canada Resources Limited, and the entities or management that comprise
          the Leland / Watford Group. All of the entities comprising the Group
          were under common management and control.

     (b)  Petroleum and natural gas properties and equipment:

          (i)  Capitalized costs:

               The Group followed the full cost method of accounting for its
               petroleum and natural gas properties. Under this method, all
               costs related to the exploration for and development of petroleum
               and natural gas reserves are capitalized. Costs include lease
               acquisition costs, geological and geophysical expenses, overhead
               directly related to exploration and development activities and
               costs of drilling both productive and non-productive wells.
               Proceeds from the sale of properties are applied against
               capitalized costs, without any gain or loss being realized,
               unless such sale would significantly alter the rate of depletion
               and depreciation.

          (ii) Depletion and depreciation:

               Depletion of petroleum and natural gas properties and
               depreciation of production equipment is provided using the
               unit-of-production method based upon estimated proven petroleum
               and natural gas reserves. The costs of significant unevaluated
               properties are excluded from costs subject to depletion. For
               depletion and depreciation purposes, relative volumes of
               petroleum and natural gas production and reserves are converted
               at the energy equivalent conversion rate of six thousand cubic
               feet of natural gas to one barrel of crude oil.

         (iii) Ceiling test:

               In applying the full cost method, the Group calculates a ceiling
               test whereby the net book value of petroleum and natural gas
               properties and production equipment, net of the accumulated
               provision for site restoration costs, is compared annually to an
               estimate of future net cash flow from the production of proven
               reserves. Net cash flow is estimated using period end prices,
               less estimated future general and administrative expenses,
               financing costs and income taxes. Should this comparison indicate
               an excess net book value, the excess is charged against earnings
               as additional depletion and depreciation.

          (iv) Joint venture:

               The Group conducts substantially all of its oil and gas
               exploration and production activities on a joint venture basis.
               These combined financial statements reflect only the Group's
               proportionate interest in such activities.

     (c)  Site restoration provision:

          The Group provides for an estimate of future site restoration costs
          over the life of the proven reserves on a unit-of-production basis.
          Costs are estimated each year by management based on current
          regulations, costs, technology and industry standards. Actual site
          restoration costs are charged against the accumulated provision
          account as incurred.

     (d)  Income taxes:

          The Group uses the liability method of accounting for income taxes.
          Under this method, income tax liabilities and assets are recognized
          for the estimated tax consequences attributable to differences between
          the amounts reported in the financial statements and their respective
          tax bases, using income tax rates

                                       12
<Page>

          enacted at the balance sheet date. The effect of a change in rates on
          future income tax liabilities and assets is recognized in the period
          that the change occurs.


                                       13
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)


1.   SIGNIFICANT ACCOUNTING POLICIES (CONTINUED):

     (e)  Revenue recognition:

          Revenues from the sale of crude oil, natural gas and natural gas
          liquids are recorded on a gross basis when title passes to an external
          party.

     (f)  Hedging activities:

          The Group may use forward contracts to hedge its exposure to commodity
          price fluctuations. Gains or losses on oil and natural gas
          transactions are reported as adjustments to oil and natural gas
          revenues when the related production is sold.

     (g)  Short-term investments:

          The Group considers all highly liquid investments with a remaining
          maturity of three months or less at the time of purchase to be cash
          equivalents.

     (h)  Use of estimates:

          The preparation of financial statements in accordance with Canadian
          generally accepted accounting principles requires management to make
          estimates and assumptions that affect the reported amounts of assets
          and liabilities at the date of the financial statements and the
          reported amounts of revenues and expenses during the reporting period.
          The most significant estimates relate to determining the provisions
          for depletion, depreciation and site restoration as well as the
          ceiling test which are based upon estimates of proven reserves and
          future costs. Actual results could differ from these estimates.

2.   CAPITAL ASSETS:

<Table>
<Caption>
                                                           ACCUMULATED
                                                          DEPLETION AND      NET BOOK
2000                                         COST         DEPRECIATION         VALUE
- ----                                      -----------     -------------    -----------
                                                                  
Petroleum and natural gas properties
  and production equipment                $20,101,128      $ 3,511,302      $16,589,826
Office furniture and equipment                126,055           53,947           72,108
                                          -----------      -----------      -----------
                                          $20,227,183      $ 3,565,249      $16,661,934
                                          ===========      ===========      ===========
1999
- ----
Petroleum and natural gas properties
  and production equipment                $14,138,110      $   817,675      $13,320,435
Office furniture and equipment                106,399           18,827           87,572
                                          -----------      -----------      -----------
                                          $14,244,509      $   836,502      $13,408,007
                                          ===========      ===========      ===========
</Table>


                                       14
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)


2.   CAPITAL ASSETS (CONTINUED):

     At December 31, 2000, approximately $415,000 (December 31, 1999 - $56,000)
     of unevaluated properties were excluded from the depletion and depreciation
     calculation. At December 31, 2000, the estimated future site restoration
     costs to be accrued over the remaining proved reserves totaled
     approximately $877,000 (December 31, 1999 - $566,000). During the periods
     ended December 31, 2000 and 1999 no overhead applicable to acquisition,
     development and exploration activities was capitalized to petroleum and
     natural gas properties.

3.   BANK INDEBTEDNESS:

     At December 31, 2000, the Group has a number of revolving production loan
     credit facilities aggregating to a maximum of $2,000,000. The loans bear
     interest at the bank's prime rate plus 1% per annum, are due on demand and
     are unsecured. As at December 31, 2000, $575,000 of the loan credit
     facilities was outstanding.

4.   DUE TO/FROM RELATED PARTIES:

     The amounts due to/from related parties are due to/from shareholders,
     officers, and directors of the Group or companies under their control.
     These amounts are unsecured, non-interest bearing and with no specific
     terms of repayment.

5.   SHARE CAPITAL:

     Share capital consists of the capital of each of the individual companies
     listed in note 1(a). Details of the share capital is as follows:

     (a)  Leland Energy Canada Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of Class A voting shares; and

               (ii) Unlimited number of non-voting Class B shares.

          (ii) Class A voting shares issued:

<Table>
<Caption>
                                                        NUMBER OF            TOTAL
                                                         SHARES             AMOUNT
                                                        ---------         -----------
                                                                    
Balance, December 31, 1999                                    --          $        --
  Issued on incorporation                                    100                   10
  Issued on the distribution of the net assets
    of the Leland Energy Limited Partnership              20,333            3,420,875
                                                          ------          -----------
Balance, December 31, 2000                                20,433          $ 3,420,885
                                                          ======          ===========
</Table>


                                       15
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)


5.   SHARE CAPITAL (CONTINUED):

     (b)  Brian Hiebert Energy Limited:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                         NUMBER OF            TOTAL
                                                          SHARES             AMOUNT
                                                        ---------         -----------
                                                                    
Balance, December 31, 1999                                     --         $        --
  Issued for cash                                       1,000,100                  25
                                                        ---------         -----------
December 31, 2000                                       1,000,100         $        25
                                                        =========         ===========
</Table>

     Subsequent to December 31, 2000, Brian Hiebert Energy Limited issued
     268,377 voting flow-through common shares for proceeds totaling $268,377.


     (c)  Guy Grierson Energy Limited:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                         NUMBER OF            TOTAL
                                                          SHARES             AMOUNT
                                                        ---------         -----------
                                                                    
Balance, December 31, 1999                                     --         $        --
  Issued for cash                                       1,000,100                  25
                                                        ---------         -----------
December 31, 2000                                       1,000,100         $        25
                                                        =========         ===========
</Table>

     Subsequent to December 31, 2000, Guy Grierson Energy Limited issued 268,377
     voting flow-through common shares for proceeds totaling $268,377.

                                       16
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)


5.   SHARE CAPITAL (CONTINUED):

     (d)  Gord Maybee Energy Limited:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                         NUMBER OF            TOTAL
                                                          SHARES             AMOUNT
                                                        ---------         -----------
                                                                    
Balance, December 31, 1999                                     --         $        --
  Issued for cash                                       1,000,100                  25
                                                        ---------         -----------
December 31, 2000                                       1,000,100         $        25
                                                        =========         ===========
</Table>

               Subsequent to December 31, 2000, Gord Maybee Energy Limited
               issued 205,674 voting flow-through common shares for proceeds
               totaling $164,539.


     (e)  Ian deBie Energy Limited:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:


<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                   SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -        $           -
  Issued for cash                                                 1,000,100                   25
                                                                  ---------        -------------
December 31, 2000                                                 1,000,100        $          25
                                                                  =========        =============
</Table>

               Subsequent to December 31, 2000, Ian de Bie Energy Limited issued
               253,174 voting flow-through common shares for proceeds totaling
               $202,539.


                                       17
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

5.   SHARE CAPITAL (CONTINUED):

     (f)  E. Hiebert Energy Limited:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:


<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -        $           -
  Issued for cash                                                 1,000,100                   25
                                                                  ---------        -------------
December 31, 2000                                                 1,000,100        $          25
                                                                  =========        =============
</Table>


     (g)  R. Grierson Energy Limited:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -        $           -
  Issued for cash                                                 1,000,100                   25
                                                                  ---------        -------------
December 31, 2000                                                 1,000,100        $          25
                                                                  =========        =============
</Table>


                                       18
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)


5.   SHARE CAPITAL (CONTINUED):

     (h) P. Maybee Energy Limited:

        (i)   Authorized:

              (i) Unlimited number of voting common shares; and

              (ii)  Unlimited number of voting preferred shares.

       (ii)   Voting common shares issued:

<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -        $           -
  Issued for cash                                                 1,000,100                   25

                                                                  ---------        -------------
December 31, 2000                                                 1,000,100        $          25
                                                                  =========        =============
</Table>


     (i)  K. deBie Energy Limited:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:


<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -        $           -
  Issued for cash                                                 1,000,100                   25
                                                                  ---------        -------------
December 31, 2000                                                 1,000,100        $          25
                                                                  =========        =============
</Table>


                                       19
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

5.   SHARE CAPITAL (CONTINUED):

     (j)  Watford Energy Ltd.:

          (i)  Authorized:

              (i) Unlimited number of voting common shares; and

              (ii) Unlimited number of preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -        $           -
  Issued for cash                                                       100                  100
                                                                  ---------        -------------
December 31, 2000                                                       100        $         100
                                                                  =========        =============
</Table>

               The outstanding shares of Watford Energy Ltd. as at December 31,
               2000 were issued to and held collectively by Hiebert Watford
               Holdings Ltd., Grierson Watford Holdings Ltd., Maybee Watford
               Holdings Ltd. and de Bie Watford Holdings Ltd. and as a result,
               the share capital and related investment balances were eliminated
               in the preparation of the combined financial statements.

     (k)  Hiebert Watford Holdings Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -        $           -
  Issued for cash                                                       100                   10
                                                                  ---------        -------------
December 31, 2000                                                       100        $          10
                                                                  =========        =============
</Table>

               Subsequent to December 31, 2000, Hiebert Watford Holdings Ltd.
               issued 1,733,785 voting flow-through common shares for proceeds
               totaling $1,733,785. Of these shares issued, 985,100 shares were
               issued to Hiebert Resources Ltd., a company which forms part of
               the Group, for proceeds totaling $985,100.


                                       20
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

5.   SHARE CAPITAL (CONTINUED):

     (l)  Grierson Watford Holdings Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -           $        -
  Issued for cash                                                       100                   10
                                                                  ---------        -------------
December 31, 2000                                                       100           $       10
                                                                  =========        =============
</Table>

               Subsequent to December 31, 2000, Grierson Watford Holdings Ltd.
               issued 1,733,785 voting flow-through common shares for proceeds
               totaling $1,733,785. Of these shares issued, 985,100 shares were
               issued to Grierson Resources Ltd., a company which forms part of
               the Group, for proceeds totaling $985,100.

     (m)  Maybee Watford Holdings Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -           $        -
  Issued for cash                                                       100                   10
                                                                  ---------        -------------
December 31, 2000                                                       100           $       10
                                                                  =========        =============
</Table>

               Subsequent to December 31, 2000, Maybee Watford Holdings Ltd.
               issued 865,141 voting flow-through common shares for proceeds
               totaling $865,141. Of these shares issued, 492,391 shares were
               issued to Maybee Resources Ltd., a company which forms part of
               the Group, for proceeds totaling $492,391.


                                       21
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

5.   SHARE CAPITAL (CONTINUED):

     (n)  De Bie Watford Holdings Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of voting preferred shares.

          (ii) Voting common shares issued:

<Table>
<Caption>
                                                                  NUMBER OF            TOTAL
                                                                    SHARES             AMOUNT
                                                                  ---------        -------------
                                                                             
Balance, December 31, 1999                                                -           $        -
  Issued for cash                                                       100                   10
                                                                  ---------        -------------
December 31, 2000                                                       100           $       10
                                                                  =========        =============
</Table>

               Subsequent to December 31, 2000, De Bie Watford Holdings Ltd.
               issued 1,255,006 voting flow-through common shares for proceeds
               totaling $1,255,006. Of these shares issued, 714,126 shares were
               issued to Wild River Resources Ltd., a company which forms part
               of the Group, for proceeds totaling $714,126.

     (o)  Hiebert Resources Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of non-voting common shares.

          (ii) Common shares issued:


<Table>
<Caption>
                                       NON-VOTING                             VOTING
                                 NUMBER            AMOUNT            NUMBER             AMOUNT
                                 ------          ----------          ------           ----------
                                                                          
Balance, January 1, 1999              -          $        -               -           $        -
  Issued for cash                    49                  15              51                   15
                                 ------          ----------          ------           ----------
Balance, December 31, 1999           49                  15              51                   15
  Repurchased                       (49)                (15)            (50)                 (14)
                                 ------          ----------          ------           ----------
December 31, 2000                     -          $        -               1           $        1
                                 ======          ==========          ======           ==========
</Table>


                                       22
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

5.   SHARE CAPITAL (CONTINUED):

     (p)  Grierson Resources Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of non-voting common shares.

          (ii) Common shares issued:


<Table>
<Caption>
                                       NON-VOTING                             VOTING
                                 NUMBER            AMOUNT            NUMBER             AMOUNT
                                 ------          ----------          ------           ----------
                                                                          
Balance, January 1, 1999              -          $        -               -           $        -
  Issued for cash                    49                  15              51                   15
                                 ------          ----------          ------           ----------
Balance, December 31, 1999           49                  15              51                   15
  Repurchased                       (49)                (15)            (50)                 (14)
                                 ------          ----------          ------           ----------
December 31, 2000                     -          $        -               1           $        1
                                 ======          ==========          ======           ==========
</Table>

     (q)  Maybee Resources Ltd.:

          (i)  Authorized:

               (i)  Unlimited number of voting common shares; and

               (ii) Unlimited number of non-voting common shares.

          (ii) Common shares issued:


<Table>
<Caption>
                                       NON-VOTING                             VOTING
                                 NUMBER            AMOUNT            NUMBER             AMOUNT
                                 ------          ----------          ------           ----------
                                                                          
Balance, January 1, 1999              -          $        -               -           $        -
  Issued for cash                    49                  15              51                   15
                                 ------          ----------          ------           ----------
Balance, December 31, 1999           49                  15              51                   15
  Repurchased                       (49)                (15)            (50)                 (14)
                                 ------          ----------          ------           ----------
December 31, 2000                     -          $        -               1           $        1
                                 ======          ==========          ======           ==========
</Table>


                                       23
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

5.   SHARE CAPITAL (CONTINUED):

     (r) Wild River Resources Ltd.:

        (i)   Authorized:

              (i)  Unlimited number of voting common shares; and

              (ii) Unlimited number of non-voting common shares.

       (ii)   Common shares issued:

<Table>
<Caption>
                                       NON-VOTING                             VOTING
                                 NUMBER            AMOUNT            NUMBER             AMOUNT
                                 ------          ----------          ------           ----------
                                                                          
Balance, January 1, 1999              -          $        -               -           $        -
  Issued for cash                    49                  15              51                   15
                                 ------          ----------          ------           ----------
Balance, December 31, 1999           49                  15              51                   15
  Repurchased                       (49)                (15)            (50)                 (14)

                                 ------          ----------          ------           ----------
December 31, 2000                     -          $        -               1           $        1
                                 ======          ==========          ======           ==========
</Table>


6.   INCOME TAXES:
     The provision for income taxes differs from the amount obtained by applying
     the combined Canadian Federal and Alberta Provincial income tax rate of
     44.6% to earnings before income taxes. The difference relates to the
     following items:

<Table>
<Caption>
                                                                           2000                1999
                                                                       ------------        ------------
                                                                                     
Computed expected tax                                                  $  8,642,055        $    944,679

Non-deductible crown charges, net of Alberta Royalty
 Tax Credits                                                                534,101             231,592
Small business rate reduction                                                     -            (180,425)
Resource allowance                                                       (1,587,919)           (188,207)
Non-taxable partnership income (note 1(a))                                 (442,350)           (697,317)
Non-taxable portion of gain on the sale of the partnership                 (395,887)                  -
                                                                       ------------        ------------
                                                                       $  6,750,000        $    110,322
                                                                       ============        ============
</Table>


                                     24
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

6.   INCOME TAXES (CONTINUED):

     The components of the net future income tax liability are as follows:

<Table>
<Caption>
                                                                                2000                 1999
                                                                            -------------        -------------
                                                                                           
     Future income tax assets:
         Future site restoration                                            $      23,800        $       3,200
         Capital assets                                                                 -               34,600
                                                                            -------------        -------------
                                                                                   23,800               37,800
     Future income tax liabilities:
         Capital assets                                                        (4,554,269)                   -
         Deferred partnership income                                             (492,900)            (148,122)
                                                                            -------------        -------------
     Net future income tax asset (liability)                                $  (5,023,369)       $    (110,322)
                                                                            =============        =============
</Table>

7.   SUPPLEMENTAL CASH FLOW DISCLOSURE:

     (a) Changes in non-cash working capital:

<Table>
<Caption>
                                                                                2000                 1999
                                                                            -------------        -------------
                                                                                           
         Accounts receivable                                                $  (3,708,697)       $  (2,868,988)
         Prepaid expenses                                                        (271,239)            (178,376)
         Accounts payable                                                       1,845,323            4,419,808
         Income taxes payable                                                   1,836,953                    -
                                                                            -------------        -------------
                                                                                 (297,660)           1,372,444
         Add (deduct) changes in non-cash working
           capital relating to investing                                       (1,911,210)            (938,000)
                                                                            -------------        -------------
                                                                            $  (2,208,870)       $     434,444
                                                                            =============        =============
</Table>

     (b) The following cash payments were made:

<Table>
<Caption>
                                                                                2000                 1999
                                                                            -------------        -------------
                                                                                           
         Interest                                                           $      61,614        $           -
         Taxes                                                              $      63,500        $           -
                                                                            =============        =============
</Table>

                                      25
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

8.   COMMITMENTS:

     (a) Hedging activities:

         Subsequent to December 31, 2000, the Group entered into various forward
         commodity contracts as follows:

<Table>
<Caption>
                                                         START            TERMINATION
         COMMODITY            VOLUMES (i)                 DATE                DATE                   PRICE
         ---------            -----------                -----            -----------                -----
                                                                                
         Natural gas            1,000 GJ/day       January 1, 2001        March 31, 2001        $9.00/GJ Floor
                                                                                             $12.40/GJ Ceiling
         Natural gas            1,000 GJ/day           May 1, 2001          May 31, 2001             $6.815/GJ
         Natural gas            6,000 GJ/day          June 1, 2001      October 31, 2001             $6.940/GJ
         Natural gas            1,000 GJ/day      November 1, 2001        March 31, 2002             $6.815/GJ
</Table>


           (i) A GJ is defined as a gigajoule

     (b) Drilling commitment:
         During the year ended December 31, 2000 the Group entered into a
         farm-in agreement to drill 20 wells and acquire 40 square miles of
         seismic. As at December 31, 2000 the Group had drilled 5 wells and
         acquired 42 square miles of seismic. Subsequent to December 31, 2000,
         the Group drilled the remaining wells which satisfied all other
         obligations required under the farm-in agreement.


9.   SUBSEQUENT EVENT:

     On August 10, 2001, shareholders of the Group entered into an agreement to
     sell all of the issued and outstanding shares of the companies comprising
     the Group to Markwest Acquisitions Corp., a wholly-owned subsidiary of
     Markwest Hydrocarbon Inc.


                                      26
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)

10.  RECONCILIATION TO ACCOUNTING PRINCIPLES GENERALLY ACCEPTED IN THE
     UNITED STATES:

     The Group's combined financial statements have been prepared in accordance
     with accounting principles generally accepted in Canada ("GAAP"), which
     differ in some respects to those in the United States. Any differences in
     accounting principles as they pertain to the accompanying combined
     financial statements were not material except as described below:

<Table>
<Caption>
                                                                                2000                 1999
                                                                           --------------        -------------
                                                                                           
     Net earnings in accordance with Canadian GAAP                         $   12,626,804        $   2,007,792

     Adjustments:
         Accounting for income taxes (a)                                          (31,982)              (3,294)
                                                                           --------------        -------------
     Net earnings under U.S. GAAP                                          $   12,594,822        $   2,004,498
                                                                           ==============        =============
</Table>

     Balance sheet items in accordance with U.S. GAAP:

<Table>
<Caption>
                                                                                2000                 1999
                                                                           --------------        -------------
                                                                                           
     Assets:
         Current assets                                                    $   15,006,902        $   3,091,750
         Capital assets                                                        16,661,934           13,408,007
                                                                           --------------        -------------
                                                                           $   31,668,836        $  16,499,757
                                                                           ==============        =============
     Liabilities and Group Equity:
         Current liabilities                                               $   14,862,385          $ 4,969,043
         Site restoration                                                          71,700               22,260
         Future income taxes (a)                                                5,058,645              113,616
         Group's equity                                                        11,676,106           11,394,838
                                                                           --------------        -------------
                                                                           $   31,668,836        $  16,499,757
                                                                           ==============        =============
</Table>

     (a) The Canadian GAAP liability method of accounting for income taxes
         requires the measurement of future income tax liabilities and assets
         using income tax rates that reflect enacted income tax rate reductions
         provided it is more likely than not that the Group will be eligible for
         such enacted rate reductions in the period of reversal. U.S. GAAP
         allows the recording of such rate reductions only when claimed.


                                      27
<Page>

LELAND/WATFORD GROUP
Notes to Combined Financial Statements

Periods ended December 31, 2000 and 1999 (note 1(a))
(Amounts Expressed in Canadian Dollars)


     U.S. GAAP ceiling tests were only performed at December 31, 2000 and
     December 31, 1999, which are the balance sheet dates presented. The Group
     performs a cost recovery ceiling test which limits net capitalized costs to
     the undiscounted estimated future net revenue from proven oil and gas
     reserves plus the cost of unproven properties less impairment, using
     year-end prices. In addition, the value is further limited by including
     financing costs, administration expenses, future abandonment and site
     restoration costs and income taxes. Under U.S. GAAP, companies using the
     "full cost" method of accounting for oil and gas producing activities
     perform a ceiling test using discounted estimated future net revenues from
     proven oil and gas reserves using a discount factor of 10%. Prices used in
     the U.S. GAAP ceiling tests performed for this reconciliation were those in
     effect at the applicable balance sheet date. Financing and administration
     cost are excluded from the calculation under U.S. GAAP. Application of the
     US GAAP ceiling test did not result in any material differences to Canadian
     GAAP.

     ADDITIONAL U.S. GAAP DISCLOSURES:
     Statement of Financial Accounting Standards No. 133, "Accounting for
     Derivative Instruments and Hedging Activities" (SFAS 133), establishes new
     accounting and reporting standards for derivative instruments and for
     hedging activities. This statement requires an entity to establish, at the
     inception of a hedge, the method it will use for assessing the
     effectiveness of the hedging derivative and the measurement approach for
     determining the ineffective aspect of the hedge. SFAS 133 is effective for
     the Group commencing January 1, 2001. As at January 1, 2001, the adoption
     of the provisions of SFAS 133 would not impact the Group.



                                       28
<Page>

ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS

(b) UNAUDITED INTERIM FINANCIAL STATEMENTS OF BUSINESS ACQUIRED.


LELAND/WATFORD GROUP
Interim Report for June 30,
  2001 and 2000

Combined Balance Sheets
(Canadian Dollars)

<Table>
<Caption>
                                                                         JUNE 30,                DECEMBER 31,
                                                                           2001                      2000
                                                                       (UNAUDITED)
                                                                       -----------               ------------
                                                                                          
Assets

Current assets:
     Cash and short-term investments                                   $ 7,432,555                $ 7,979,602
     Accounts receivable                                                 4,196,406                  6,577,685
     Prepaid expenses                                                      302,391                    449,615
     Due from related parties                                            3,281,951                          -
                                                                       -----------                -----------
                                                                        15,213,303                 15,006,902

     Capital assets                                                     22,941,854                 16,661,934

                                                                       -----------                -----------
   Total assets                                                        $38,155,157                $31,668,836
                                                                       ===========                ===========


Liabilities and Group's Equity

Current liabilities:
     Accounts payable                                                  $ 3,613,176                $ 6,265,131
     Income taxes payable                                                5,192,347                  1,836,953
     Bank indebtedness                                                      15,000                    575,000
     Due to related parties                                              5,183,757                  6,185,301
                                                                       -----------                -----------
                                                                        14,004,280                 14,862,385

Site restoration                                                           121,268                     71,700

   Future income taxes                                                   6,161,353                  5,023,369

   Group's equity (note 2)                                              17,868,256                 11,711,382
                                                                       -----------                -----------
       Total liabilities and Group's Equity                            $38,155,157                $31,668,836
                                                                       ===========                ===========
</Table>

See accompanying notes to combined financial statements.



                                     29
<Page>

LELAND/WATFORD GROUP
Interim Report for Six Months
 Ended June 30, 2001 and 2000

Combined Statements of Earnings and Group's Equity
(Canadian Dollars, unaudited)

<Table>
<Caption>
                                                                   SIX MONTHS ENDED          SIX MONTHS ENDED
                                                                       JUNE 30,                  JUNE 30,
                                                                        2001                       2000
                                                                   ----------------          ----------------
                                                                                       
Revenues:
     Petroleum and natural gas sales                                 $ 23,799,164              $   5,728,640
     Royalties                                                         (6,486,760)                (1,150,542)
                                                                     ------------              -------------
                                                                       17,312,404                  4,578,098

Expenses:
     Production                                                         3,202,497                    734,768
     General and administration                                         1,145,125                  1,016,807
     Bonuses (note 3)                                                   5,725,455                          -
     Depletion, depreciation and amortization                           2,039,407                    839,437
                                                                     ------------              -------------
                                                                       12,112,484                  2,591,012

Earnings before other items and income taxes                            5,199,920                  1,987,086

Other income (expense) items:
     Gain on sale of partnership (note 4)                                       -                  8,679,640
     Gain on settlement of derivatives                                  2,186,770                          -
     Interest and other income                                            115,745                    259,322
                                                                     ------------              -------------
                                                                        2,302,515                  8,938,962

Less: Income taxes
     Current                                                            3,355,394                    509,246
     Future                                                              (287,394)                 4,026,210
                                                                     ------------              -------------
                                                                        3,068,000                  4,535,456
                                                                     ------------              -------------
Net earnings                                                         $  4,434,435              $   6,390,592
                                                                     ============              =============

Group's equity, balance beginning of period                          $ 11,711,382              $  11,398,132

     Share capital issued (note 2)                                      1,889,454                          -
     Net earnings for the period                                        4,434,435                  6,390,592
     Distributions paid to related parties on the
       Sale of the partnership                                                  -                 (8,584,521)
     Capital dividends paid                                              (167,015)                (3,729,167)
                                                                     ------------              -------------
                                                                        6,156,874                 (5,923,096)
                                                                     ------------              -------------

Group's Equity, balance end of period                                $ 17,868,256              $   5,475,036
                                                                     ============              =============
</Table>

See accompanying notes to combined financial statements.


                                      30
<Page>

LELAND/WATFORD GROUP
Interim Report for Six Months
 Ended June 30, 2001 and 2000

Combined Statements of Cash Flows
(Canadian Dollars, unaudited)


<Table>
<Caption>
                                                                     SIX MONTHS ENDED        SIX MONTHS ENDED
                                                                         JUNE 30,                JUNE 30,
                                                                          2001                     2000
                                                                     ----------------        ----------------
                                                                                       
Cash provided by (used in):

Operations:
     Net earnings                                                      $ 4,434,435              $ 6,390,592
     Items not involving cash:
       Depletion, depreciation and amortization                          2,039,407                  839,437
       Gain on sale of partnership                                               -               (8,679,640)
       Future income taxes                                                (287,394)               4,026,210
                                                                       -----------              -----------

                                                                         6,186,448                2,576,599

Change in non-cash operating working capital                             3,231,942               (1,923,041)
                                                                       -----------              -----------
                                                                         9,418,390                  653,558

Financing:
     Distributions on the sale of the partnership                                -               (8,584,521)
     Issuance of share capital                                           3,314,832                        -
     Net change in loan payable                                           (560,000)                (549,235)
     Due from related parties                                           (4,283,495)               1,052,007
     Dividend payments                                                    (167,015)              (3,729,167)
                                                                       -----------              -----------
                                                                        (1,695,678)             (11,810,916)

Investing:
     Capital asset additions                                            (8,269,759)              (4,145,217)
     Partners' interest in capital assets on
       the sale of the partnership                                               -                9,127,156
     Proceeds on the sale of partnership                                         -               11,722,882
                                                                       -----------              -----------
                                                                        (8,269,759)              16,704,821

                                                                       -----------              -----------
Change in cash and short-term investments                                 (547,047)               5,547,463

Cash and short-term investments, beginning of period                     7,979,602                        -

                                                                       -----------              -----------
Cash and short-term investments, end of period                         $ 7,432,555              $ 5,547,463
                                                                       ===========              ===========
</Table>

See accompanying notes to combined financial statements.


                                      31
<Page>

LELAND/WATFORD GROUP
Interim Report for Six Months
 Ended June 30, 2001 and 2000

Notes to Interim Financial Statements
(Canadian Dollars, unaudited)



1.   UNAUDITED FINANCIAL STATEMENTS

     The accompanying unaudited combined financial statements have been prepared
     by management in accordance with Canadian generally accepted accounting
     principles. In the opinion of management, the unaudited combined financial
     statements contain all adjustments (consisting only of normal recurring
     items) necessary to present fairly the financial position of Leland Energy
     and Watford Energy Ltd. ("Leland/Watford") as of June 30, 2001, and the
     results of operations and cash flows for the six-month periods presented.
     Certain information and footnote disclosures normally included in financial
     statements prepared in accordance with generally accepted accounting
     principles have been condensed or omitted. The results of operations for
     the periods presented are not necessarily indicative of the results to be
     expected for the full year. Management believes the disclosures made are
     adequate to ensure that the information is not misleading in a material
     respect and suggests that these financial statements be read in conjunction
     with Leland/Watford financial statements for the year ended December 31,
     2000.

2.   GROUP'S EQUITY

     During the six months ended June 30, 2001, the Group issued 3,406,602
     flow-through voting common shares for proceeds aggregating $3,314,832. The
     resource expenditure deductions for income tax purposes related to
     exploratory and development activities funded by flow-through share
     arrangements are renounced to investors in accordance with Canadian tax
     legislation. As such, Canadian generally accepted accounting practices
     require future income tax liabilities and share capital to be adjusted by
     the estimated cost of the renounced tax deductions when the shares are
     issued. This adjustment totaled $1,425,378 relating to the flow-through
     voting common shares issued during the six months ended June 30, 2001.

3.   BONUSES

     Bonuses were accrued at June 30, 2001 in the amount of $5,725,455 for the
     purpose of distributing earnings to the Group prior to closing of the sale
     of the Group to MarkWest Acquisitions Corp.

4.   GAIN ON SALE OF PARTNERSHIP

     For the six months ended June 30, 2000, the Partnership distributed certain
     of its net assets with a net book value totaling $3,569,044 to the
     partners. The Partnership was then subsequently sold, which resulted in a
     gain totaling $8,679,640 for those entities included within the Group that
     collectively owned 25% of the Partnership.

5.   RECONCILIATION TO ACCOUNTING PRINCIPLES GENERALLY ACCEPTED IN THE
     UNITED STATES:

     The Group's combined financial statements have been prepared in accordance
     with accounting principles generally accepted in Canada ("GAAP"), which
     differ in some respects to those in the United States. Any differences in
     accounting principles as they pertain to the accompanying combined
     financial statements were not material except as described below:



                                     32
<Page>

LELAND/WATFORD GROUP
Interim Report for Six Months
 Ended June 30, 2001 and 2000

Notes to Interim Financial Statements
(Canadian Dollars, unaudited)


5.   RECONCILIATION TO ACCOUNTING PRINCIPLES GENERALLY ACCEPTED IN THE
     UNITED STATES (CONTINUED):


<Table>
<Caption>
                                                                              JUNE 30,              JUNE 30,
                                                                                2001                  2000
                                                                           --------------        -------------
                                                                                           
     Net earnings in accordance with Canadian GAAP                         $    4,434,435        $   6,390,592

     Adjustments:
         Accounting for income taxes (a)                                       (1,425,378)                   -

                                                                           --------------        -------------
     Net earnings under U.S. GAAP                                          $    3,009,057        $   6,390,592
                                                                           ==============        =============
</Table>

     Balance sheet items in accordance with U.S. GAAP:

<Table>
<Caption>
                                                                               JUNE 30
                                                                                 2001
                                                                           --------------
                                                                        
     Assets:
         Current assets                                                    $   15,213,303
         Capital assets                                                        22,941,854

                                                                           --------------
                                                                           $   38,155,157
                                                                           ==============

     Liabilities and Group Equity:
         Current liabilities                                               $   14,004,280
         Site restoration                                                         121,268
         Future income taxes (a)                                                6,196,629
         Group's equity                                                        17,832,980

                                                                           --------------
                                                                           $   38,155,157
                                                                           ==============
</Table>

     (a) The Canadian GAAP liability method of accounting for income taxes
         requires the measurement of future income tax liabilities and assets
         using income tax rates that reflect enacted income tax rate reductions
         provided it is more likely than not that the Group will be eligible for
         such enacted rate reductions in the period of reversal. U.S. GAAP
         allows the recording of such rate reductions only when claimed.


                                     33
<Page>

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.

(c)  PRO FORMA FINANCIAL INFORMATION

         UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION

The following unaudited pro forma financial information has been prepared to
assist in the analysis of the financial effects of the acquisition of the
Leland/Watford Group ("Leland/Watford") by MarkWest Acquisitions Corp. We
derived this information from the Leland/Watford audited combined financial
statements for the year ended December 31, 2000 and unaudited financial
statements for the six months ended June 30, 2001 and from Markwest's audited
financial statements for the year ended December 31, 2000 and unaudited
financial statements for the six months ended June 30, 2001. The information is
only a summary and you should read it in conjunction with the historical
financial statements and related notes contained in the annual reports and other
information that Markwest has filed with the Securities and Exchange Commission
and with the audited and unaudited financial statements of Leland/Watford
contained herein. The applicable exchange rate is set forth in note (b).

You should consider several factors when comparing the historical financial
information of Markwest and Leland/Watford and to the unaudited pro forma
financial information, including the following:

          o   The unaudited pro forma condensed combined balance sheet gives
              effect to the consolidation as if it had occurred on June 30,
              2001. The unaudited 2000 pro forma combined statement of income
              gives effect to the merger as if it occurred on January 1, 2000.
              The unaudited pro forma combined statement of income for the first
              six months of 2001 also gives effect to the merger as if it
              occurred on January 1, 2000.

          o   The unaudited pro forma information is for illustrative
              purposes only.  If the acquisition had occurred in the past,
              the combined company's financial position and operating results
              might have been different from that presented in the unaudited
              pro forma condensed combined financial statements. In addition,
              the purchase price allocation is preliminary and will be
              finalized following further analysis of the assets acquired and
              liabilities assumed.  You should not rely on the unaudited pro
              forma information as an indication of the financial position or
              operating results that the combined company would have achieved
              if the merger had occurred in the past.  You also should not
              rely on the unaudited pro forma information as an indication of
              future results that the company will achieve after the
              acquisition.


                                      34
<Page>

MARKWEST HYDROCARBON, INC.
UNAUDITED PRO FORMA CONSOLIDATED BALANCE SHEET
JUNE 30, 2001
(IN U.S. DOLLARS, UNLESS OTHERWISE NOTED, AND IN THOUSANDS)


<Table>
<Caption>
                                                          CDN$           US$
                                                       LELAND/(a)      LELAND/(b)   ACQUISITION      MARKWEST
                                        MARKWEST       WATFORD         WATFORD      ADJUSTMENTS      PRO FORMA
                                       ----------      ----------     -----------   -----------      ---------
                                                                                      
Assets

Current assets:
   Cash and cash equivalents           $    2,391       $  7,433       $  4,877       $       -       $  7,268
   Accounts receivable                     15,960          4,196          2,753               -         18,713
   Inventories                              5,248              -              -               -          5,248
   Risk management asset                    1,662              -              -               -          1,662
   Other assets                             1,082          3,584          2,351               -          3,433
                                       ----------       --------       --------       ---------       --------
     Total current assets                  26,343         15,213          9,981               -         36,324
                                       ----------       --------       --------       ---------       --------
Property and equipment:
   Gas processing, gathering,
     storage and marketing
     equipment                             99,058              -              -               -         99,058
   Oil and gas properties and
     equipment                             23,470         28,419         18,646          57,452 (c)     99,568
   Land, buildings & other
     equipment                              6,536            127             83           2,603 (c)      9,222
   Construction in progress                14,730              -              -               -         14,730
                                       ----------       --------       --------       ---------       --------
                                          143,794         28,546         18,729          60,055        222,578

   Less: accumulated depreciation,
       depletion and amortization          31,015          5,604          3,677          (3,677)(c)     31,015
                                       ----------       --------       --------       ---------       --------
     Net property & equipment             112,779         22,942         15,052          63,732        191,563

Risk management asset                         725              -              -               -            725
Intangible assets, net                        253              -              -               -            253
                                       ----------       --------       --------       ---------       --------
     Total assets                      $  140,100       $ 38,155       $ 25,033       $  63,732       $228,865
                                       ==========       ========       ========       =========       ========

Liabilities and shareholders' equity

Current liabilities:
   Accounts payable                    $    8,764       $  3,628       $  2,380       $       -       $ 11,144
   Accrued liabilities                      8,114         10,376          6,808               -         14,922
   Risk management liability                  405              -              -               -            405
                                       ----------       --------       --------       ---------       --------
                                           17,283         14,004          9,188               -         26,471

Deferred income taxes                      12,327          6,161          4,042          25,150 (c)     41,519
Long-term debt                             46,000              -              -          50,306 (c)     96,306
Other liabilities                               -            121             80               -             80

Shareholders' equity:
   Common stock                                87              -              -               -             87
   Additional paid-in capital              42,539          1,989          1,305          (1,305)(c)     42,539
   Retained earnings                       21,136         15,879         10,418         (10,418)(c)     21,136
   Accumulated other
     comprehensive income                   1,279              -              -               -          1,279
  Treasury stock                             (551)             -              -               -           (551)
                                       ----------       --------       --------       ---------       --------
     Total stockholders' equity            64,490         17,868         11,723         (11,723)        64,490

   Total liabilities and
       stockholders' equity            $  140,100       $ 38,155       $ 25,033       $  63,732       $228,865
                                       ==========       ========       ========       =========       ========
</Table>


                                      35
<Page>

MARKWEST HYDROCARBON, INC.
UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
YEAR ENDED DECEMBER 31, 2000
(IN U.S DOLLARS, UNLESS OTHERWISE NOTED, AND IN THOUSANDS)


<Table>
<Caption>
                                                          CDN$           US$
                                                       LELAND/(a)      LELAND/(b)   ACQUISITION      MARKWEST
                                        MARKWEST       WATFORD         WATFORD      ADJUSTMENTS      PRO FORMA
                                       ----------     -----------     -----------   -----------      ---------
                                                                                     
Revenues:
     Gathering, processing and
       marketing                       $  217,393       $      -       $      -               -       $217,393
     Exploration and production             4,161         16,985         11,441               -         15,602
                                       ----------       --------       --------       ---------       --------
       Total revenues                     221,554         16,985         11,441               -        232,995

Expenses:
     Cost of sales                        173,281              -              -               -        173,281
     Operating expenses                    17,339          2,420          1,630               -         18,969
     General and administration             8,761          1,521          1,025               -          9,786
     Depletion, depreciation and
       amortization                         6,314          2,778          1,871           2,637 (d)     10,822
                                       ----------       --------       --------       ---------       --------
       Total operating expenses           205,695          6,719          4,526           2,637        212,858

Income from operations:                    15,859         10,266          6,915          (2,637)        20,137

Other income and expense:
     Interest income                          101            491            331               -            432
     Interest expense                      (3,110)           (60)           (40)         (4,287)(e)     (7,437)
     Gain on sale of assets                 1,000          8,680          5,847               -          6,847
     Other income (expense)                   (84)             -              -               -            (84)
                                       ----------       --------       --------       ---------       --------
   Total other income and expense          (2,093)         9,111          6,138          (4,287)          (242)

Income before taxes                        13,766         19,378         13,053          (6,924)        19,895

Provision for income taxes                  4,888          6,750          4,547          (2,888)(f)      6,547
                                       ----------       --------       --------       ---------       --------
Net income                             $    8,878       $ 12,627       $  8,506       $  (4,036)      $ 13,348
                                       ==========       ========       ========       =========       ========


Weighted average number of
   common shares outstanding
     Basic                                 8,452               -              -               -          8,452
     Diluted                               8,452               -              -               -          8,452

                                       ----------       --------       --------       ---------       --------
Net income per common share
     Basic                                $ 1.05               -              -               -       $   1.58
     Diluted                              $ 1.05               -              -               -       $   1.58
                                       ==========       ========       ========       =========       ========
</Table>

See accompanying notes to pro forma financial statements.


                                     36
<Page>

MARKWEST HYDROCARBON, INC.
UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
SIX MONTHS ENDED JUNE 30, 2001
(IN U.S. DOLLARS, UNLESS OTHERWISE NOTED, AND IN THOUSANDS)

<Table>
<Caption>
                                                          CDN$           US$
                                                       LELAND/(A)      LELAND/(B)   ACQUISITION      MARKWEST
                                        MARKWEST       WATFORD         WATFORD      ADJUSTMENTS      PRO FORMA
                                       ----------     -----------     -----------   -----------      ---------
                                                                                      
Revenues:
     Gathering, processing and
       marketing                       $ 114,058        $      -       $      -               -       $114,058
     Exploration and production            5,036          17,312         11,403               -         16,439
                                       ----------       --------       --------       ---------       --------
       Total revenues                    119,094          17,312         11,403               -        130,497

Expenses:
     Cost of sales                        98,675               -              -               -         98,675
     Operating expenses                    8,997           3,203          2,110               -         11,107
     General and administration            4,283           1,145            754               -          5,037
     Bonuses                                   -           5,725          3,771               -          3,771
     Depletion, depreciation
       and amortization                    3,405           2,039          1,343           2,863 (d)      7,611
                                       ----------       --------       --------       ---------       --------
       Total operating expenses          115,360          12,112          7,978           2,863        126,201

Income from operations:                    3,734           5,200          3,425          (2,863)         4,296

Other income and expense:
     Interest income                          82             118             78               -            160
     Interest expense                     (1,260)             (2)            (1)         (1,756)(e)     (3,017)
     Gain on settlement of hedges              -           2,187          1,441               -          1,441
     Gain on sale of assets                    -               -              -               -              -
     Other income (expense)                 (248)              -              -               -           (248)
                                       ----------       --------       --------       ---------       --------
   Total other income and expense         (1,426)          2,303          1,518          (1,756)        (1,664)

Income before taxes                        2,308           7,503          4,943          (4,619)         2,632

Provision for income taxes                   851           3,068          2,021          (1,926)(f)        946
                                       ----------       --------       --------       ---------       --------
Net income                             $   1,457        $  4,435       $  2,922       ($  2,693)      $  1,686
                                       ==========       ========       ========       =========       ========

Weighted average number of
   common shares outstanding
     Basic                                 8,469               -              -               -          8,469
     Diluted                               8,498               -              -               -          8,469
                                       ----------       --------       --------       ---------       --------
Net income per common share
     Basic                               $  0.17               -              -               -       $   0.20
     Diluted                             $  0.17               -              -               -       $   0.20
                                       ==========       ========       ========       =========       ========
</Table>

See accompanying notes to pro forma financial statements.



                                      37
<Page>


NOTES TO UNAUDITED PRO FORMA FINANCIAL INFORMATION

       (a)        Leland/Watford historical financial statements, prepared in
                  accordance with Canadian generally accepted accounting
                  principles, stated in Canadian dollars.

       (b)        Leland/Watford's historical financial statements have been
                  translated from Canadian dollars to U.S. dollars as follows:

                  Leland/Watford's assets and liabilities were translated to
                  U.S. dollars using the exchange rate in effect at June 30,
                  2001, of $1 Canadian to $0.6561 U.S.

                  Leland/Watford's revenues and expenses for the year ended
                  December 31, 2000, and the six months ended June 30, 2001,
                  were translated to U.S. dollars using the weighted average
                  exchange rate for the period of $1 Canadian to $0.6736 U.S.
                  and $1 Canadian to $0.6587 U.S., respectively.

       (c)        To eliminate the historical book value of Leland/Watford's
                  assets and liabilities and to reflect the purchase of
                  Leland/Watford's stock by MarkWest. The following table recaps
                  the net pro forma adjustments to eliminate the historical book
                  value of Leland/Watford's assets and liabilities and the
                  allocation of the purchase price paid for Leland/Watford to
                  the assets received and the liabilities assumed.

<Table>
<Caption>
                                            ELIMINATION OF                      PURCHASE         NET PRO
                                            LELAND/WATFORD    PURCHASE          PRICE            FORMA
                                            HISTORICAL        PRICE             ALLOCATION       ADJUSTMENT
                                            -------------     -------------     -------------    -------------
                                                                                     
         Current assets                       $ (9,981)                         $  9,981         $      -
         Oil & gas properties                  (18,646)                           76,098           57,452
         Other equipment                           (83)                            2,686            2,603
         Accumulated depreciation,
           depletion & amortization              3,677                                 -            3,677
                                              --------         --------         --------         --------
                                              $(25,033)                         $ 88,766         $ 63,732
                                              ========         ========         ========         ========
         Current liabilities                  $ (9,188)        $  9,188                          $      -
         Long-term debt                              -           50,306                            50,306
         Deferred income taxes (i)              (4,042)          29,192                            25,150
         Other liabilities                         (80)              80                                 -
         Common stock and
           paid-in capital                      (1,305)                                            (1,305)
         Retained earnings                     (10,418)                                           (10,418)
                                              --------         --------         --------         --------
                                              $(25,033)        $ 88,766                          $ 63,732
                                              ========         ========         ========         ========
</Table>

                  The following table reflects the calculation of the purchase
                  price for Leland/Watford:

<Table>
                                                                                            
                  Current liabilities assumed                                                  $    9,188
                  Incremental borrowings by MarkWest                                               50,306
                  Deferred income taxes(i)                                                         29,192
                  Other liabilities assumed                                                            80
                                                                                               ----------
                                                                                               $   88,766
                                                                                               ==========
</Table>

              (i)     The difference between the book and tax basis of the
                      Leland/Watford resulted in a deferred tax adjustment of
                      approximately $29,000.



                                      38
<Page>

                  The allocation of the purchase price to the assets acquired
                  was based upon the estimated relative fair value of each
                  asset. MarkWest estimated the fair value of
                  Leland/Watford's current assets, other property, current
                  liabilities and other non-current liabilities to be
                  equivalent to Leland/Watford's historical net book value.
                  The oil and gas properties of Leland/Watford were valued
                  based upon proved and probable oil and gas reserve
                  valuations prepared in conjunction with the acquisition and
                  an internal appraisal was made of the undeveloped leasehold
                  position and seismic of Leland/Watford.

       (d)        The increase in the cost basis assigned to Leland/Watford's
                  oil and gas properties resulted in an increase in the
                  depreciation, depletion and amortization expense.

       (e)        Included in the December 31, 2000 Consolidated Statement of
                  Operations are revenues and net operating income (revenues
                  less royalties and operating expenses) of $541,061 and
                  $431,197 respectively, attributable to the property sold to
                  Gulf Canada Resources Ltd.

       (f)        Interest expense  increased as a result of borrowing
                  approximately $50 million under MarkWest's new bank
                  line of credit.

       (g)        The income tax (provision) benefit was adjusted for the
                  impact of the acquisition and the pro forma adjustments.

       (h)        The following are supplemental information on oil and gas
                  producing activities at December 31, 2000:

<Table>
<Caption>
                                                     MarkWest Leland/           MarkWest Hydrocarbon
                                                     Hydrocarbon       Watford          Pro Forma
                                                     ----------------  -------  --------------------
                                                                      
                  Proved reserves   (Mmcfe)           34,585            26,394            60,979

                  Standardized measure of
                  discounted net cash flow
                  related to proved reserves         $65,050           $46,860          $111,910
</Table>


                                       39
<Page>

ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS

(d)      EXHIBITS.

              The following exhibits are furnished as part of this report.

              2.1   - Share Purchase Agreement between MarkWest Acquisitions
                           Corp. and Kaiser Energy Ltd. (Schedules omitted.
                           MarkWest agrees to provide supplementally a copy
                           of the schedules to the Commission upon request)*

              2.2   - Share Purchase Agreement between MarkWest Acquisitions
                           Corp. and Brian E. Hiebert, Guy C. Grieson, Ian R.
                           De Bie, Gordon A. Maybee, Erin Hiebert, Raylene
                           Grierson, Kathleen De Bie, and Patricia Maybee.
                           (Schedules omitted.  MarkWest agrees to provide
                           supplementally a copy of the schedules to the
                           Commission upon request)*

              10.1  - Bank Credit Agreement between MarkWest Hydrocarbon, Inc.
                           and Bank of America N.A.*

              10.2  - 4th Amended and Restated Credit Agreement among MarkWest
                           Hydrocarbon, Inc., and various lenders**

              10.3  - Canadian Credit Agreement among MarkWest Resources
                           Canada Corp. and various lenders**

              99.1  - Consent of Independent Chartered Accountants--KPMG LLP


              *  Incorporated by reference from the Company's 8-K filed with
                 the Commission on August 27, 2001

              ** Previously filed with Amendment No. 1 to the Form 8-K on
                 October 24, 2001.

                                      40


<Page>


                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

Date:  May 24, 2002                            MarkWest Hydrocarbon, Inc.



                                               By: /s/ Gerald A. Tywoniuk
                                               -------------------------------
                                               Gerald A. Tywoniuk
                                               Chief Financial Officer and
                                               Vice President of Finance
                                               (On Behalf of the Registrant
                                               and as Principal Financial
                                               and Accounting Officer)



                                         41


<Page>


INDEX TO EXHIBITS


<Table>
<Caption>
           EXHIBIT NUMBER                             DESCRIPTION
                                     


                 99.1                      Consent of Independent Chartered Accountants--KPMG
</Table>

                                         42