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1. summary of Significant accounting policies

The management of Enerplus Resources Fund ("Enerplus" or the "Fund") prepares the financial statements in accordance with Canadian generally accepted accounting principles ("GAAP"). A reconciliation between Canadian GAAP and United States of America GAAP is disclosed in Note 15. The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingencies, if any, as at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The following significant accounting policies are presented to assist the reader in evaluating these consolidated financial statements and, together with the following notes, should be considered an integral part of the consolidated financial statements.

(a) Organization and Basis of Accounting

The Fund is an open-end investment trust created under the laws of the Province of Alberta operating pursuant to the Amended and Restated Trust Indenture between EnerMark Inc., its wholly-owned subsidiary, Enerplus Resources Corporation ("ERC") and CIBC Mellon Trust Company as Trustee. The beneficiaries of the Fund (the "unitholders") are holders of the trust units issued by the Fund. As a trust under the Income Tax Act (Canada), Enerplus is limited to holding and administering permitted investments and making distributions to the unitholders.

The Fund's financial statements include the accounts of the Fund and its subsidiaries on a consolidated basis. All inter-entity transactions have been eliminated.

(b) Revenue Recognition

Revenue associated with the sale of crude oil, natural gas and natural gas liquids is recognized when title passes from the Fund to its customers based on volumes delivered and contractual delivery points and price. A portion of the properties acquired through the March 5, 2003 acquisition of PCC Energy Inc. and PCC Energy Corp. are subject to a royalty arrangement with a private company that is structured as a net profits interest. The results from operations included in the Fund's consolidated financial statements for these properties are reduced for this net profits interest.

(c) Property, Plant and Equipment ("PP&E")

The Fund follows the full cost method of accounting for petroleum and natural gas properties under which all acquisition and development costs are capitalized on a country by country cost centre basis. Such costs include land acquisition, geological, geophysical and drilling costs for productive and non-productive wells and directly related overhead charges. Repairs, maintenance and operational costs that do not extend or enhance the recoverable reserves are charged to earnings. Proceeds from the sale of petroleum and natural gas properties are applied against the capitalized costs. Gains and losses are not recognized upon disposition of oil and natural gas properties unless such a disposition would alter the rate of depletion by 20% or more. Net costs related to operating and administrative activities during the development of large capital projects are capitalized until commercial production has commenced.

(d) Impairment Test

A limit is placed on the aggregate carrying value of PP&E (the "impairment test"). The Fund performs an impairment test on a country by country basis. An impairment loss exists when the carrying amount of the country's PP&E exceeds the estimated undiscounted future net cash flows associated with the country's proved reserves. If an impairment loss is determined to exist, the costs carried on the balance sheet in excess of the discounted future net cash flows associated with the country's proved and probable reserves are charged to income. Reserves are determined pursuant to National Instrument 51-101 "Standards of Disclosure for Oil and Gas Activities".


(e) Depletion and Depreciation

The provision for depletion and depreciation of oil and natural gas assets is calculated on a country by country basis using the unit-of-production method, based on the country's share of estimated proved reserves before royalties. Reserves and production are converted to equivalent units on the basis of 6 Mcf = 1 bbl, reflecting the approximate relative energy content.

(f) Goodwill

The Fund, when appropriate, recognizes goodwill relating to corporate acquisitions when the total purchase price exceeds the fair value of the net identifiable assets and liabilities of the acquired companies. The goodwill balance is assessed for impairment annually at year-end or as events occur that could result in an impairment. To assess impairment, the fair values of the Canadian and U.S. reporting units are compared to their respective book values. If the fair value is less than the book value, a second test is performed to determine the amount of impairment. The amount of impairment is measured by allocating the fair value of the reporting unit to its identifiable assets and liabilities as if they had been acquired in a business combination for a purchase price equal to their fair value. If goodwill determined in this manner is less than the carrying value of goodwill, an impairment loss is recognized in the period in which it occurs. Goodwill is stated at cost less impairment and is not amortized.

(g) Asset Retirement Obligations

The Fund recognizes as a liability the estimated fair value of the future retirement obligations associated with PP&E. The fair value is capitalized and amortized over the same period as the underlying asset. The Fund estimates the liability based on the estimated costs to abandon and reclaim its net ownership interest in all wells and facilities and the estimated timing of the costs to be incurred in future periods. This estimate is evaluated on a periodic basis and any adjustment to the estimate is prospectively applied. As time passes, the change in net present value of the future retirement obligation is expensed through accretion. Retirement obligations settled during the period reduce the future retirement liability. No gains or losses on retirement activities were realized, due to settlements approximating the estimates.

(h) Income Taxes

The Fund is a taxable entity under the Income Tax Act (Canada) and is taxable only on Canadian income that is not distributed or distributable to the Fund's unitholders. In the Trust structure, payments made between the Canadian operating entities and the Fund, ultimately transfers both income and future income tax liability to the unitholders. The future income tax liability associated with Canadian assets recorded on the balance sheet is recovered over time through these payments. As the Canadian operating entities transfer all of their Canadian taxable income to the Fund, no provision for current Canadian income tax has been made by any Canadian operating entity.

The U.S. operating entity is subject to U.S. income taxes on its taxable income determined under U.S. income tax rules and regulations. Repatriation of funds from U.S. operations will also be subject to applicable withholding taxes as required under U.S. tax law. A provision has been setup to reflect these current U.S. income taxes.

The Fund follows 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 temporary differences between the amounts reported in the financial statements of the Fund's corporate subsidiaries and their respective tax bases, using substantively enacted income tax rates. The effect of a change in these income tax rates on future income tax liabilities and assets is recognized in income during the period that the change occurs.

(i) Financial Instruments

The Fund is exposed to market risks resulting from fluctuations in commodity prices and interest rates in the normal course of operations. The Fund uses various types of financial instruments to manage these market risks. Prior to December 31, 2005, the Fund designated certain commodity contracts and interest rate swaps as qualified hedges. Effective December 31, 2005, the Fund elected to stop designating commodity contracts as qualified hedges. The fair value of the former commodity hedges has been recorded as a financial liability with an offset to deferred financial assets. The deferred financial asset will be amortized over the remaining lives of the associated financial contracts. The fair value of the financial liability will be determined at each period end with any resulting change in fair value being taken into income in that period.

The gain or loss in fair value of all financial contracts that had not previously qualified for hedge accounting are taken into income during the period of change and charged to deferred credits or deferred charges on the balance sheet.

Proceeds or costs realized from holding interest rate swaps are recognized at the time each transaction under a contract is settled and is recorded in interest expense. The Fund has designated the interest rate swaps as qualified hedges and these swaps are evaluated quarterly to ensure they effectively hedge the underlying interest rate.

(j) Foreign Currency Translation

The Fund's U.S. operations are self-sustaining. Assets and liabilities of these operations are translated into Canadian dollars at period end exchange rates, while revenues and expenses are converted using average rates for the period. Gains and losses from the translation into Canadian dollars are deferred and included in the foreign currency translation adjustment as part of unitholders' equity.

Other monetary assets and liabilities, not related to the Fund's U.S. operations, are translated into Canadian dollars at rates of exchange in effect at the balance sheet date. The other assets and related depreciation, depletion and amortization, other liabilities, revenue and other expenses are translated into Canadian dollars at rates of exchange in effect at the respective transaction dates. The resulting exchange gains or losses are included in earnings.

2. CHANGES IN ACCOUNTING POLICIES

Unit Based Compensation

Generally accepted accounting principles require the Fund to estimate the fair value of unit options issued under its unit based compensation programs and recognize this amount as compensation expense in the income statement over the respective vesting period with a credit to contributed surplus. Prior to October 1, 2005, the Fund measured unit based compensation based on the intrinsic value of the rights and recognized the amount in income over the vesting period. After the rights vested, changes in the intrinsic value were recognized in income in the period of change. The intrinsic value was determined as the excess of the trust unit price over the exercise price of the right at the date of exercise, or the date of the financial statements for the unexercised rights. The change in value was reflected in general and administrative expenses ("G&A") and contributed surplus. Cash received upon exercise of the rights and the related amount of contributed surplus was credited to unitholders' capital.

On October 1, 2005 the Fund retroactively adopted the fair value method of accounting for the trust unit rights incentive plan to January 1, 2003. Under this method, the fair value of the rights is determined on the date in which fair value can reasonably be determined, generally being the grant date. This amount is charged to earnings over the vesting period of the rights, with a corresponding increase in contributed surplus. When rights are exercised, the proceeds, together with the amount recorded in contributed surplus, are recorded to unitholders' capital. The impact of the adoption on our 2003 and 2004 reported earnings was not material and therefore prior period financial statements have not been restated.

For the year ended December 31, 2005, the fair value methodology resulted in a compensation expense of $3,040,000 compared to an $18,688,000 compensation expense calculated under the intrinsic methodology.

3. DEFERRED FINANCIAL ASSETS AND DEFERRED CREDITS

Current Deferred Financial Assets ($ thousands)  
Deferred financial asset as at December 31, 2004 $ -
Deferred financial asset recorded upon termination of hedging relationships (1) 49,874
Deferred financial asset as at December 31, 2005 $ 49,874
(1) Represents the fair value of financial contracts on December 31, 2005 for which hedge accounting is no longer applied. This deferred financial asset will be amortized over the remaining lives of the associated financial contracts.

Current Deferred Credits ($ thousands)  
Deferred credits as at December 31, 2004 $ 42,303
Financial contract assumed through Lyco acquisition 1,014
Financial liability recorded upon termination of hedging relationships (1) 49,874
Change in fair value - other financial contracts (2) (35,823)
Deferred credits as at December 31, 2005 $ 57,368
(1) Represents the fair value of financial contracts on December 31, 2005 for which hedge accounting is no longer applied. (2) Changes in the fair value of financial contracts that do not qualify for hedge accounting are taken into income during the period as other financial contracts and reflected as an increase or decrease in the deferred financial liability.
The following table summarizes the income statement effects of other financial contracts:

Other Financial Contracts ($ thousands) 2005 2004
Change in fair value $ (35,823) $ 21,288
Amortization of deferred financial assets 3,144 17,872
Realized cash costs, net 115,343 78,053
Other financial contracts $ 82,664 $ 117,213


During the year ended December 31, 2005, the Fund realized cash costs of $27,256,000 (net gains and losses) from financial contracts that qualified as hedges compared to cash costs of $18,167,000 during 2004.

4. ASSET RETIREMENT OBLIGATIONS

Total future asset retirement obligations were estimated by management based on the Fund's net ownership interest in wells and facilities, estimated costs to abandon and reclaim the wells and facilities and the estimated timing of the costs to be incurred in future periods. The Fund has estimated the net present value of its total asset retirement obligations to be $110,606,000 at December 31, 2005 compared to $105,978,000 at December 31, 2004 based on a total liability of $422,045,000 and $383,942,000 respectively. These payments are expected to be made over the next 66 years with the majority of costs incurred between 2026 and 2035. To calculate the present value of the asset retirement obligations for 2005 the Fund used a weighted credit-adjusted rate of approximately 6.3% (2004 - 6.5%) and an inflation rate of 2.0% for both years. Settlements during the year approximated our estimates and as a result, no gains or losses were recognized.

Following is a reconciliation of the asset retirement obligations:

($ thousands) 2005 2004
Asset retirement obligations, beginning of year $105,978 $63,936
Changes in estimates 8,764 23,100
Acquisition and development activity 6,791 23,723
Dispositions (9,413) (3,000)
Retirement obligations settled (7,829) (6,826)
Accretion expense 6,315 5,045
Asset retirement obligations, end of year $110,606 $105,978


5. PROPERTY, PLANT AND EQUIPMENT

($ thousands) 2005 2004
Property, plant and equipment $5,306,137 $4,305,584
Accumulated depletion, depreciation and accretion (1,655,810) (1,276,577)
Net property, plant and equipment $3,650,327 $3,029,007


Capitalized development G&A of $11,571,000 (2004 - $8,451,000) is included in PP&E and the depletion and depreciation calculation includes future capital costs of $464,423,000 (2004 - $279,700,000) included in our reserve reports. Excluded from PP&E for the depletion and depreciation calculation is $61,795,000 (2004 - $28,574,000) related to the Joslyn development project that has not commenced commercial production.

An impairment test calculation was performed on a country by country basis on the PP&E values at December 31, 2005 in which the estimated undiscounted future net cash flows associated with the proved reserves exceeded the carrying amount of the Fund's PP&E.

The following table outlines benchmark prices and the exchange rate used in the impairment tests for both Canadian and U.S. cost centres at December 31, 2005:

Year WTI Crude Oil (1) US$/bbl Exchange Rate US$/CDN$ Edm Light Crude (1) CDN$/bbl Natural Gas 30 day spot @ AECO (1) CDN$/Mcf
2006 $60.81 $0.85 $70.07 $11.58
2007 61.61 0.85 70.99 10.84
2008 54.60 0.85 62.73 8.95
2009 50.19 0.85 57.53 7.87
2010 47.76 0.85 54.65 7.57
Thereafter + 1.5% 0.85 + 1.5% *
(1) Actual prices used in the impairment test were adjusted for commodity price differentials specific to the Fund * Escalation varies after 2010

6. PROPERTY ACQUISITIONS

Assets of Sleeping Giant LLC ("Sleeping Giant")

On October 4, 2005 the Fund acquired all ownership interests and retired the debt of Sleeping Giant, a private U.S. company holding additional working interests in certain properties of Lyco Energy Corporation for total cash consideration of $111,914,000 which was financed through existing credit facilities. The fair value of this consideration was allocated to cash and positive working capital assumed of $5,754,000 and PP&E of $106,160,000. This acquisition has been accounted for as an asset acquisition. The operating results of Sleeping Giant subsequent to October 4, 2005 are included in the Fund's consolidated financial statements.

Assets of ChevronTexaco Corporation ("ChevronTexaco")

On June 30, 2004 the Fund acquired certain oil and natural gas properties from ChevronTexaco. Total consideration was $467,199,000 financed concurrently by subscription receipts issued on June 15, 2004 and available lines of credit. Results from operations have been included in Enerplus' financial results from June 30, 2004 forward.



7. CORPORATE ACQUISITIONS

The allocation to the fair value of the assets acquired and liabilities assumed plus the future income tax cost are summarized as follows:

($ thousands) 2005 Lyco 2005 TriLoch 2004 Ice Energy
Property, plant and equipment $ 506,379 $ 77,786 $ 130,544
Goodwill (with no tax base) 179,019 18,450 29,082
Future income taxes (179,019) (18,450) (29,082)


506,379 77,786 130,544
Cash 27,231 - -
Non-cash working capital deficiency (31,664) (399) (9,373)
Net assets acquired $ 501,946 $ 77,387 $ 121,171


Goodwill is comprised of the following:

($ thousands)  
Goodwill as at December 31, 2004 $ 29,082
Lyco acquisition 179,019
TriLoch acquisition 18,450
Foreign exchange (1) (5,317)
Goodwill as at December 31, 2005 $ 221,234
(1) The foreign exchange results from the translation of the Lyco goodwill at the period end rate.

Lyco Energy Corporation ("Lyco")

On August 30, 2005 the Fund acquired all the outstanding common shares and retired the debt including all outstanding mandatorily redeemable preferred shares of Lyco, a private U.S. company operating in the states of Montana and North Dakota. Total consideration was approximately $501,946,000, and the Fund assumed a net working capital deficiency of $4,433,000. Goodwill of $179,019,000 was recorded based on the excess of the consideration paid over the value assigned to the identifiable assets and liabilities including the future income tax liability. The acquisition, which was financed through an equity offering and available credit facilities, has been accounted for using the purchase method of accounting for business combinations. Results from the operations of Lyco subsequent to August 30, 2005 are included in the Fund's consolidated financial statements.

TriLoch Resources Inc. ("TriLoch")

On July 1, 2005 the Fund acquired all the outstanding common shares of TriLoch, a public Alberta corporation operating in southern Alberta, in exchange for 1,632,516 trust units of the Fund with a recorded value of $69,088,000. The trust unit value was based on the weighted average price of the Fund's trust units on the Toronto Stock Exchange during the five day trading period surrounding the announcement of the TriLoch transaction. Total consideration was $77,387,000 consisting of units, deal costs and the retirement of TriLoch's bank indebtedness. The Fund also assumed a working capital deficiency of $399,000. Goodwill of $18,450,000 has been recorded as a result of the excess of the consideration paid over the value allocated to the identifiable assets and liabilities including the future income tax liability. This acquisition has been accounted for using the purchase method of accounting for business combinations. Results from the operations of TriLoch subsequent to July 1, 2005 are included in the Fund's consolidated financial statements.

Ice Energy Limited ("Ice Energy")

On January 7, 2004 the Fund acquired all of the outstanding common shares of Ice Energy for total consideration of $121,171,000. The excess of the consideration paid over the fair value of the identifiable assets and liabilities resulted in the recording of $29,082,000 of goodwill. Available lines of credit financed the acquisition, which has been accounted for using the purchase method of accounting for business combinations. Results from operations of Ice Energy subsequent to January 7, 2004 are included in the Fund's consolidated financial statements.

8. LONG-TERM DEBT

($ thousands) 2005 2004
Bank credit facilities (a) $328,632 $ 251,669
Senior notes (b)    
US $175 million (issued June 19, 2002) 268,328 268,328
US $54 million (issued October 1, 2003) 62,958 64,994
Total long-term debt $659,918 $584,991


(a) Unsecured Bank Credit Facilities

In November 2004 the Fund negotiated an $850,000,000 unsecured covenant based three year term facility. Enerplus has the ability to extend the facility each year or repay the entire balance at the end of the three year term. During 2005, the facility was extended until November 2008. At December 31, 2005, Enerplus had available credit of $521,368,000 under this facility. The facility is extendible each year with a bullet payment required at the end of the three year term. Various borrowing options are available under the facility including prime rate based advances and banker's acceptance loans. This facility carries floating interest rates that are expected to range between 60.0 and 115.0 basis points over Bankers Acceptance rates, depending on Enerplus' ratio of senior debt to earnings before interest, taxes and non-cash items. The effective interest rate on the facilities for the year ended December 31, 2005 was 3.4% (2004 - 3.1%).

(b)   Senior Unsecured Notes

On October 1, 2003 Enerplus issued US$54,000,000 senior unsecured notes that mature October 1, 2015. The notes have a coupon rate of 5.46% priced at par with interest paid semi-annually on April 1 and October 1 of each year. Principal payments are required in five equal installments beginning October 1, 2011 and ending October 1, 2015. Costs incurred in connection with issuing the notes in the amount of $475,000 are classified as deferred charges on the balance sheet and are being amortized as a part of depletion, depreciation, amortization and accretion ("DDA&A") over the term of the notes. At December 31, 2005, the amount remaining to be amortized associated with these costs was $386,000 (2004 - $425,000). The notes are subject to fluctuations in foreign exchange rates.

On June 19, 2002 Enerplus issued US$175,000,000 senior unsecured notes that mature June 19, 2014. The notes have a coupon rate of 6.62% priced at par, with interest paid semi-annually on June 19 and December 19 of each year. Principal payments are required in five equal installments beginning June 19, 2010 and ending June 19, 2014. Costs incurred in connection with issuing the notes in the amount of $1,892,000 are classified as deferred charges on the balance sheet and are being amortized to DDA&A over the term of the notes. At December 31, 2005, the amount remaining to be amortized was $1,335,000 (2004 - $1,492,000). Concurrent with the issuance of the notes on June 19, 2002, the Fund entered into a cross currency swap with a syndicate of financial institutions. Under the terms of the swap, the amount of the notes was fixed for purposes of interest and principal repayments at a notional amount of CDN$268,328,000. Interest payments are made on a floating rate basis, set at the rate for three-month Canadian banker's acceptances, plus 1.18%.

The bank credit facilities and the senior notes (the "Combined Facilities") are the legal obligation of EnerMark Inc. and are guaranteed by its subsidiaries. Payments with respect to the Combined Facilities have priority over payments to the Fund and over claims of and future distributions to the unitholders. However, unitholders have no direct liability beyond their equity investment should cash flow be insufficient to repay the Combined Facilities.

9. Foreign Exchange

($ thousands) 2005 2004
Unrealized foreign exchange gain on translation of U.S. dollar denominated senior notes $(2,036) $(4,795)
Realized foreign exchange loss/(gain) 3,713 (223)
Foreign exchange loss/(gain) $1,677 $(5,018)


The US$54,000,000 senior unsecured notes that are exposed to foreign currency fluctuations are translated into Canadian dollars at the exchange rate in effect at the balance sheet date. Foreign exchange gains and losses are included in the determination of net income for the year.   10. FUND CAPITAL

(a) Unitholders' Capital

Trust Units

Authorized: Unlimited number of trust units

(thousands) 2005 2004
Issued: Units Amount Units Amount
Balance before Contributed Surplus, beginning of year 104,124 $2,826,641 94,349 $2,510,011
Issued for cash:        
Pursuant to public offerings 10,638 466,885 8,800 286,248
Pursuant to rights plans 805 24,737 648 16,947
Trust unit rights incentive plan (non- cash) - exercised - 2,163 - 1,396
DRIP*, net of redemptions 339 15,613 302 11,114
Issued for acquisition of corporate and property interests (non-cash) 1,633 69,062 25 925


117,539 3,405,101 104,124 2,826,641
Contributed Surplus (Trust Unit Rights Plan) - 5,513 - 4,636
Balance, end of year 117,539 $3,410,614 104,124 $2,831,277
* Distribution Reinvestment and Unit Purchase Plan

Contributed surplus ($ thousands) 2005 2004
Balance, beginning of year $ 4,636 $ 1,364
Trust unit rights incentive plan (non-cash) - exercised (2,163) (1,396)
Trust unit rights incentive plan (non-cash) - expensed 3,040 4,668
Balance, end of year $ 5,513 $ 4,636


On August 9, 2005 the Fund completed a Canadian equity offering of 10,637,500 subscription receipts at a price of $46.25 per subscription receipt for gross proceeds of $491,984,000 ($466,885,000 net of issuance costs). The subscription receipts were exchanged for an equal number of trust units on August 30, 2005 upon the closing of the Lyco transaction. The holders of the subscription receipts received the August 2005 cash distribution of $0.37 per trust unit and this amount has been included in cash distributions to unitholders.

On July 1, 2005 the Fund issued 1,632,516 trust units pursuant to the acquisition of TriLoch valued at $42.32 per trust unit, being the weighted average trading price of the Fund's trust units on the Toronto Stock Exchange during the five day trading period surrounding the announcement of the TriLoch transaction, for a recorded value of $69,088,000 ($69,062,000 net of issuance costs).

On June 15, 2004 Enerplus completed an equity offering of 8,800,000 subscription receipts at a price of $34.30 per subscription receipt for gross proceeds of $301,840,000 ($286,248,000 net of issuance costs). The subscription receipts were exchanged for trust units on June 30, 2004 upon closing of the ChevronTexaco asset acquisition. The holders of the subscription receipts received the June 2004 cash distribution of $0.35 per trust unit and this amount has been included in cash distributions to unitholders.

Pursuant to the monthly Distribution Reinvestment and Unit Purchase Plan ("DRIP"), Canadian unitholders are entitled to reinvest cash distributions in additional trust units of the Fund. Trust units are issued at 95% of the weighted average market price on the Toronto Stock Exchange for the 20 trading days preceding a distribution payment date without service charges or brokerage fees. Eligible unitholders are also entitled to make optional cash payments to acquire additional trust units, however the 5% discount does not apply.

Trust units are redeemable by unitholders at approximately 85% of the current market price. Redemptions are limited to $500,000 during any rolling two calendar months. Redemption requests in excess of $500,000 can be paid using investments of the Fund or a non-interest bearing instrument.

(b) Trust Unit Rights Incentive Plan

As at December 31, 2005 a total of 2,621,000 rights issued pursuant to the Trust Unit Rights Incentive Plan ("Rights Plan") at an average exercise price of $42.80 were outstanding. This represents 2.2% of the total trust units outstanding of which 643,000 rights with an average exercise price of $32.46 were exercisable. Under the Rights Plan, distributions per trust unit to Enerplus unitholders in a calendar quarter which represent a return of more than 2.5% of the net PP&E of Enerplus at the end of such calendar quarter, may result in a reduction in the exercise price of the rights. Results for the year ended December 31, 2005 reduced the exercise price of the outstanding rights by $1.64 per trust unit of which a $0.41 reduction is effective January 2006 and a $0.48 reduction is effective April 2006. Plan members have the choice to exercise rights using the original exercise price or a reduced strike price, should a reduction take place. In certain circumstances, it may be more advantageous to use the original exercise price as it could effectively lower the plan member's tax rate on the transaction.

The Fund uses a binomial lattice option-pricing model to calculate the estimated fair value of rights granted under the plan. The following assumptions were used to arrive at the estimate of fair value:



2005
2004
Dividend yield
8.97%
10.45%
Right's exercise price reduction
$1.43
$1.05
Volatility
21.46%
20.77%
Risk-free interest rate
3.70%
3.63%
Forfeiture rate
4.60%
5.80%


The fair value of the rights granted under the plan ranged between 7% and 10% of the underlying market price of a trust unit on the grant date.

During the year the Fund expensed $3,040,000 of unit based compensation expense using the fair value method. The remaining future fair value of the rights of $6,380,000 at December 31, 2005 will be recognized in earnings over the remaining vesting period of the rights.

Activity for the rights issued pursuant to the Rights Plan is as follows:


2005 2004


Number of Rights (000's) Weighted Average Exercise Price (1) Number of Rights (000's) Weighted Average Exercise Price (1)
Trust unit rights outstanding        
Beginning of year 2,401 $34.33 2,192 $30.05
Granted 1,125 53.07 1,002 40.22
Exercised (805) 30.72 (644) 26.16
Cancelled (100) 37.15 (149) 30.94
End of year 2,621 42.80 2,401 34.33
Rights exercisable at the end of the year 643 $32.46 551 $27.84
(1) Exercise price reflects grant prices less reduction in strike price discussed above.

The following table summarizes information with respect to outstanding Unit Rights as at December 31, 2005. Unit rights vest between one and three years and expire between four and six years.

Rights Outstanding at December 31, 2005 (000's) Original Exercise Price Exercise Price after Price Reductions Expiry Date December 31 Rights Exercisable at December 31, 2005 (000's)
14 $ 24.50 $ 20.31 2007 14
1 26.40 22.33 2008 1
2 27.33 23.33 2008 2
162 26.09 22.23 2008 162
33 27.70 24.04 2009 11
47 33.00 29.65 2009 26
31 36.00 33.03 2009 18
404 37.62 35.04 2009 199
33 40.70 38.51 2010 7
51 37.25 35.43 2010 -
88 38.83 37.41 2010 8
645 40.80 39.73 2010 195
121 45.55 44.80 2011 -
132 44.86 44.46 2011 -
169 49.75 49.75 2011 -
688 56.93 56.93 2011 -
2,621 $ 44.03 $ 42.80   643


Non-cash compensation costs of $3,040,000 ($0.03 per unit) related to the rights issued since January 1, 2003 have been charged to G&A expense during 2005 compared to $4,668,000 ($0.05 per unit) during 2004. The following table outlines the estimated compensation cost associated with the rights issued during 2002 and the pro forma effects on net income and net income per unit, had the Canadian Institute of Chartered Accountants Handbook ("CICA") section 3870 been applied retroactive to 2002.

($ thousands, except per unit amounts) 2005 2004
Net income as reported $432,041 $258,316
Compensation expense for rights issued in 2002 (160) (4,734)
Pro forma net income $431,881 $253,582
Net income per trust unit - basic    
Reported $3.96 $2.60
Pro forma $3.96 $2.55
Net income per trust unit - diluted    
Reported $3.95 $2.60
Pro forma $3.95 $2.55


(b)   Basic and Diluted per Trust Unit Calculations   Net income per trust unit has been determined based on the following:  
(thousands) 2005 2004
Weighted average units 109,083 99,273
Dilutive impact of rights 288 143
Diluted trust units 109,371 99,416


In calculating the weighted average number of diluted units outstanding for the year ended December 31, 2005, we excluded 132,511 rights (2004 - 40,929), because their exercise price was greater than the annual average unit market price in those periods. During the last two years, outstanding rights were the only potential dilutive instrument.

11. INCOME TAXES

(a) Enerplus Resources Fund

The Fund is an inter-vivos trust for income tax purposes. As such, the Fund's income that is not allocated to the Fund's unitholders is taxable. The Fund intends to allocate all income to unitholders.

For 2005, the Fund had taxable income of $451,000,000 (2004 - $381,000,000) or $4.05 per trust unit (2004 - $3.77 per trust unit). Taxable income of the Fund is comprised of dividend, royalty, interest and partnership income, less deductions for Canadian oil and gas property expense ("COGPE") and trust unit issue costs.

The amounts of COGPE and issue costs remaining in the Fund at December 31, 2005 are $466,700,000 and $40,109,000 respectively (2004 - $506,985,000 and $32,297,000).

(b) Corporate Subsidiaries

The future income tax liability on the balance sheet arises as a result of the following temporary differences:

($ thousands) 2005 2004
Excess of net book value of property, plant and equipment over the underlying tax bases $485,965 $285,606
Asset retirement obligations (37,976) (35,945)
Deferred hedging and other (5,019) (14,110)
Future income tax liability $442,970 $235,551


The provision for income taxes varies from the amounts that would be computed by applying the combined Canadian federal and provincial income tax rates for the following reasons:





($ thousands) 2005 2004
Income before taxes $ 456,619 $ 188,105
Computed income tax expense at the enacted rate of 38.01% (38.86% for 2004) $ 173,564 $ 73,098
Increase (decrease) resulting from:    
Net income attributed to the Fund (172,463) (153,686)
Non-deductible crown royalties 30,652 38,647
Resource allowance (37,047) (35,966)
Amended returns and pool balances 16,544 (105)
Capital taxes 6,486 6,612
Change in tax rate - (5,700)
Tax rate differentials (1) 628 -
Other 6,214 6,889
Provision for (recovery of) income taxes 24,578 (70,211)
(1) The corporate income tax rate in the U.S. is 40.75%.

12. financial instruments

The Fund's financial instruments presented on the balance sheet consist of cash, accounts receivable, deferred financial assets, other current assets, a portion of deferred charges, current liabilities and long-term debt.

The carrying value of cash, accounts receivable, current liabilities and the outstanding bank credit facility balances approximate their fair value. Other current assets are comprised of prepaid expenses and marketable securities. The marketable securities are carried on the balance sheet at the lower of cost and fair value. The fair value of the marketable securities at December 31, 2005 exceeded the cost of these securities by $10,898,000. T he Fund carried US$54,000,000 of fixed rate debt. In addition, it carried US$175,000,000 of fixed rate debt that was converted to CDN$268,328,000 floating rate debt through a cross-currency swap with a syndicate of financial institutions. At December 31, 2005 the fair value of the senior unsecured notes was $64,110,000 (for the US$54,000,000 notes) and $212,025,000 (for the US$175,000,000 notes), see Note 8 . The balance related to derivative instruments that did not qualify for hedge accounting treatment upon adoption of AcG-13 in 2004, was fully amortized at December 31, 2005. At December 31, 2004, this balance was $3,144,000 and was included in deferred charges.

The estimated fair values have been determined based on available market information and appropriate valuation methods. The actual amounts realized may differ from these estimates.

(a) Credit Risk

Most of the Fund's accounts receivable relate to oil and natural gas sales and are exposed to typical industry credit risks. The Fund manages this credit risk by entering into sales contracts with only highly rated entities and reviewing its exposure to individual entities on a regular basis. The Fund is also exposed to certain losses in the event of non-performance by counterparties to derivative financial instruments. This credit risk is managed by the Fund by selecting financially sound counterparties.

(b) Interest Rate Risk

The Fund is exposed to movements in interest rates. Long-term debt is comprised of both variable rate bank facilities and fixed rate senior notes. The Fund monitors the interest rate forward market and through the use of interest rate swaps along with the fixed-rate notes has fixed the interest rate on approximately 21% of its debt. See part (d) below.

(c) Currency Risk

The Fund is exposed to fluctuations in foreign currency as a result of its U.S. operations and the issuance of senior unsecured notes denominated in U.S. dollars. Through the use of a financial swap, the exposure on our US$175,000,000 senior unsecured notes has been converted to Canadian dollar debt. As well, the Fund has indirect exposure to fluctuations in foreign currency as crude oil sales and a portion of natural gas sales are based on U.S. dollar indices. We have not entered into any foreign currency derivatives with respect to oil and natural gas sales.


(d ) Derivative Financial Instruments

The Fund uses certain derivative financial instruments to manage its commodity price, foreign currency and interest rate exposures. The fair values of these instruments are based on an approximation of the amounts that would have been paid to or received from counterparties to settle the instruments outstanding as at December 31, 2005 with reference to forward prices and market valuations provided by third party sources.

The fair values of derivative financial instruments are as follows:

Interest Rate and Cross Currency Swaps   The Fund has entered into interest rate swaps on $75,000,000 of notional debt at rates varying from 3.74% to 4.12% before banking fees that are expected to range between 0.60% and 1.15%. These interest rate swaps mature between June 2006 and January 2007. The fair value of the $75,000,000 interest rate swaps as at December 31, 2005 represents an unrealized cost of $206,000. These swaps have been designated as hedges for accounting purposes.

The fair value of the cross currency swap related to the US$175,000,000 senior unsecured notes as at December 31, 2005 represents an unrealized cost of $62,439,000 where as the fair value of the underlying debt instrument as at December 31, 2005 represents an unrealized gain of $56,303,000. The cross currency swap has been designated as a hedge for accounting purposes.

Crude Oil Instruments

Enerplus has entered into the following financial option contracts to reduce the impact of a downward movement in crude oil prices. Effective December 31, 2005, the Fund elected to stop designating commodity contracts as qualified hedges. The fair value of the financial crude oil contracts that are no longer designated as hedges for accounting purposes results in a liability of $13,321,000 (see Note 3) .

The following table summarizes the Fund's crude oil risk management positions at February 15, 2006 :



  WTI US$/bbl


Daily Volumes bbls/day Sold Call  Purchased Put Sold Put
Term        
January 1, 2006 - June 30, 2006        
3-way option 1,500 $45.80 $31.50 $27.50
Put * 1,500 - $41.50 -
Put 1,500 - - $35.00
January 1, 2006 - June 30, 2006        
Costless Collar * 1,500 $35.35 $30.00 -
Costless Collar * 1,500 $37.00 $30.00 -
January 1, 2006 - December 31, 2006        
Put * 1,500 - $50.00 -
Put 1,500 - - $41.00
January 1, 2006 - December 31, 2006        
Put * 1,500 - $53.00 -
Put 1,500 - - $43.00
January 1, 2006 - December 31, 2006        
Put * 1,500 - $53.00 -
Put 1,500 - - $43.00
* Financial contracts that were treated as hedges during 2005, however the Fund elected to stop designating these contracts as hedges as of December 31, 2005. The Fund did not enter into any new contracts in the fourth quarter of 2005.

Natural Gas Instruments

Enerplus has physical and financial contracts in place on its natural gas production as described below. Effective December 31, 2005, the Fund elected to stop designating commodity contracts as qualified hedges. The fair value of the financial natural gas contracts that are no longer designated as hedges for accounting purposes results in a liability of $36,553,000 (see Note 3) .

The following table summarizes the Fund's natural gas risk management positions at February 15, 2006:



  AECO CDN$/Mcf


Daily Volumes MMcf/day Sold Call Purchased Put Sold Put Fixed Price and Swaps
Term          
January 1, 2006 - March 31, 2006          
3-way option 9.5 $9.92 $7.12 $5.80 -
Put * 9.5 - $7.91 - -
Put * 9.5 - $7.91 - -
Put * 9.5 - $7.91 - -
January 1, 2006 - October 31, 2006          
Swap * 9.5 - - - $5.47
Swap * 4.8 - - - $5.25
Swap * 4.8 - - - $5.24
Swap * 4.8 - - - $5.28
April 1, 2006 - October 31, 2006          
Put * 9.5 - $7.38 - -
Put * 9.5 - $7.38 - -
Put * 9.5 - $7.38 - -
2006 - 2010          
Physical (escalated pricing) 2.0 - - - $2.52
* Financial contracts that were treated as hedges during 2005, however the Fund elected to stop designating these contracts as hedges as of December 31, 2005. The Fund did not enter into any new contracts in the fourth quarter of 2005. Electricity Instrument

The Fund has an electricity swap contract that fixed the price of electricity on 5MWh of Alberta Power Pool electricity consumption at $49.99/MWh from January 1, 2006 to December 31, 2006. This has been designated as a cash flow hedge and the fair value of this instrument as at December 31, 2005 is an unrealized gain of $1,019,000. Proceeds or costs realized from the electricity hedge are recognized as operating costs.

13. commitments and contingencies

(a) Pipeline Transportation

Enerplus has contracted to transport natural gas with various pipelines totaling 35.3 MMcf/day until 2008; of this amount 5 MMcf/day extends until 2015. Enerplus also has a contract to transport a minimum of 2,480 bbls/day of crude oil from the field to suitable marketing sales points until 2010.

(b) Oil Sands Lease #24

During 2002 the Fund acquired a 16% working interest in the Oil Sands Lease #24 (Joslyn Creek Lease). The acquisition included the assumption of contingent project debt that is comprised of principal of $3,360,000 plus accrued interest to December 31, 2005 of $1,281,000. Interest is accrued at the Bank of Canada prime business rate and is not compounded. The debt is contingent on production hurdles with respect to development on the lease. As it is still too early in the development of this project to determine if these hurdles will be satisfied, the contingent debt has not been accrued in the consolidated financial statements.

(c) Office Lease

Enerplus has office lease commitments for both its Canadian and U.S. operations that expire between November 2009 and January 2011. Annual costs of these lease commitments, which include rent and operating fees, amount to approximately $5,700,000.

(d) Guarantee

(i) Corporate indemnities have been provided by the Fund to all directors and certain officers of its subsidiaries and affiliates for various items including, but not limited to, all costs to settle suits or actions due to their association with the Fund and its subsidiaries and/or affiliates, subject to certain restrictions. The Fund has purchased directors' and officers' liability insurance to mitigate the cost of any potential future suits or actions. Each indemnity, subject to certain exceptions, applies for so long as the indemnified person is a director or officer of one of the Fund's subsidiaries and/or affiliates. The maximum amount of any potential future payment cannot be reasonably estimated.

(ii) The Fund may provide indemnifications in the normal course of business that are often standard contractual terms to counterparties in certain transactions such as purchase and sale agreements. The terms of these indemnifications will vary based upon the contract, the nature of which prevents the Fund from making a reasonable estimate of the maximum potential amounts that may be required to be paid. Management believes the resolution of these matters would not have a material adverse impact on the Fund's liquidity, consolidated financial position or results of operations.

Enerplus has the following minimum annual commitments including long-term debt:



($ thousands) Total
Minimum Annual Commitment Each Year
Total Committed after 2010
2006
2007
2008
2009
2010
Bank credit facility
$328,632
$ -
$ -
$328,632
$ -
$ -
$ -
Senior unsecured notes
331,286
-
-
-
-
35,000
296,286
Pipeline commitments
33,956
6,026
6,026
5,513
2,952
2,444
10,995
Office lease
23,373
5,680
5,651
5,722
5,678
592
50
Total commitments
$717,247
$11,706
$11,677
$339,867
$8,630
$38,036
$307,331


In addition, the Fund is involved in claims and litigation arising in the normal course of business. The resolution of these claims is uncertain and there can be no assurance they will be resolved in favour of the Fund, however management believes the resolution of these matters would not have a material adverse impact on the Fund's liquidity, consolidated financial position or results of operations.

14. Geographical information

Due to the acquisitions of Lyco and Sleeping Giant, the Fund now operates in Canada and the United States.  
As at December 31, 2005 ($ thousands) Oil and Gas Revenue   Capital Assets Goodwill
Canada $ 1,471,473 $ 3,054,078 $ 47,532
United States 79,096 596,249 173,702
Total $ 1,550,569 $ 3,650,327 $ 221,234


As at December 31, 2004 ($ thousands) Oil and Gas Revenue   Capital Assets Goodwill
Canada $ 1,149,765 $ 3,029,007 $ 29,082
United States - - -
Total $ 1,149,765 $ 3,029,007 $ 29,082


15. differences between Canadian and Unites States generally accepted accounting principles

The Fund's consolidated financial statements have been prepared in accordance with Canadian GAAP. These principles, as they pertain to the Fund's consolidated statements differ from United States GAAP ("U.S. GAAP") as follows:

The application of U.S. GAAP would have the following effects on net income as reported:

($ thousands) 2005 2004*
Net income as reported in the Consolidated    
Statement of Income - Canadian GAAP $432,041 $258,316
Adjustments    
Depletion, depreciation, amortization and accretion (Note (a))