UNITED STATES SECURITIES AND EXCHANGE COMMISSION
 Washington, D.C. 20549
 ________________
  Form 10-Q
  (Mark One)R
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period ended March 31, 2011OR£
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from                                                      to
 
 Commission File Number 1-2700
 ________________
  El Paso Natural Gas Company
 (Exact Name of Registrant as Specified in Its Charter)
 Delaware
74-0608280(State or Other Jurisdiction

of Incorporation or Organization)
(I.R.S. Employer

Identification No.)El Paso Building1001 Louisiana Street

Houston, Texas
77002(Address of Principal Executive Offices)
(Zip Code)
 
 Telephone Number: (713) 420-2600
 
 Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes R   No £
 
 Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes £   No £
 
 Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.
 
 Large accelerated filer £Accelerated filer £Non-accelerated filer RSmaller reporting company £
 (Do not check if a smaller reporting company)
 
 Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes £ No R
 
 Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.
 
 Common stock, par value $1 per share. Shares outstanding on May 6, 2011: 1,000
 
 EL PASO NATURAL GAS COMPANY MEETS THE CONDITIONS OF GENERAL INSTRUCTION H(1)(a) AND (b) TO FORM 10-Q AND IS THEREFORE FILING THIS REPORT WITH A REDUCED DISCLOSURE FORMAT AS PERMITTED BY SUCH INSTRUCTION.
 
 
 
 EL PASO NATURAL GAS COMPANY


TABLE OF CONTENTS





Caption
PagePART I — Financial InformationItem  1.
Financial Statements
1Item  2.
Management’s Discussion and Analysis of Financial Condition and Results of Operations
9Item  3.
Quantitative and Qualitative Disclosures About Market Risk
*Item  4.
Controls and Procedures
12PART II — Other InformationItem  1.
Legal Proceedings
13Item  1A.
Risk Factors
13Item  2.
Unregistered Sales of Equity Securities and Use of Proceeds
*Item  3.
Defaults Upon Senior Securities
*Item  4.
(Removed and Reserved)
13Item  5.
Other Information
13Item  6.
Exhibits
14Signatures
15


____________


*
We have not included a response to this item in this document since no response is required pursuant to the  reduced disclosure format permitted by General Instruction H to Form 10-Q.






Below is a list of terms that are common to our industry and used throughout this document:/d  =  per day

BBtu  =  billion British thermal unitsWhen we refer to “us”, “we”, “our” or “ours”, we are describing El Paso Natural Gas Company and/or our subsidiaries.
 
         i
 
 Table of Contents







PART I — FINANCIAL INFORMATION





Item 1. Financial Statements





EL PASO NATURAL GAS COMPANY





CONDENSED CONSOLIDATED STATEMENTS OF INCOME


(In millions)


(Unaudited)





Quarter Ended

March 31,2011


2010Operating revenues

$
124


$
145Operating expensesOperation and maintenance


46



44Depreciation and amortization


23



21Taxes, other than income taxes


8



877



73Operating income


47



72Other income (expense), net


1



(1
)Interest and debt expense


(22
)


(23
)Affiliated interest income, net


3



4Income before income taxes


29



52Income tax expense


11



20Net income

$
18


$
32





See accompanying notes.




























1
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EL PASO NATURAL GAS COMPANY





CONDENSED CONSOLIDATED BALANCE SHEETS


(In millions, except share amounts)


(Unaudited)





March 31,

2011


December 31,

2010ASSETSCurrent assetsCash and cash equivalents

$
—


$
—Accounts and notes receivableCustomer, net of allowance of $2 in 2011 and 2010


10



4Affiliates


3



6Other


29



20Materials and supplies


47



48Deferred income taxes


10



9Prepaids


10



15Regulatory assets


9



8Other


1



3Total current assets


119



113Property, plant and equipment, at cost


3,973



3,970Less accumulated depreciation and amortization


1,504



1,484Total property, plant and equipment, net


2,469



2,486Other assetsNote receivable from affiliate


867



836Other


106



110973



946Total assets

$
3,561


$
3,545LIABILITIES AND STOCKHOLDER’S EQUITYCurrent liabilitiesAccounts payableTrade

$
75


$
82Affiliates


13



25Other


11



11Taxes payable


42



28Accrued interest


28



18Accrued liabilities


33



24Other


35



27Total current liabilities


237



215Long-term debt


1,113



1,113Other liabilitiesDeferred income taxes


410



408Other


70



75480



483Commitments and contingencies (Note 3)Stockholder’s equityCommon stock, par value $1 per share; 1,000 shares authorized, issued and outstanding


—



—Additional paid-in capital


1,268



1,268Retained earnings


463



466Total stockholder’s equity


1,731



1,734Total liabilities and stockholder’s equity

$
3,561


$
3,545





See accompanying notes.





2
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EL PASO NATURAL GAS COMPANY





CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS


(In millions)


(Unaudited)





Quarter Ended

March 31,2011


2010Cash flows from operating activitiesNet income

$
18


$
32Adjustments to reconcile net income to net cash from operating activitiesDepreciation and amortization


23



21Deferred income taxes


1



10Other non-cash income items


9



8Asset and liability changes


24



41Net cash provided by operating activities


75



112Cash flows from investing activitiesCapital expenditures


(23
)


(21
)Net change in note receivable from affiliate


(31
)


(91
)Other


—



1Net cash used in investing activities


(54
)


(111
)Cash flows from financing activitiesDividends paid to parent


(21
)


—Net cash used in financing activities


(21
)


—Net change in cash and cash equivalents


—



1Cash and cash equivalentsBeginning of period


—



—End of period

$
—


$
1





See accompanying notes.
































3
 Table of Contents


EL PASO NATURAL GAS COMPANY





NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS


(Unaudited)





1. Basis of Presentation and Significant Accounting Policies





Basis of Presentation





We prepared this Quarterly Report on Form 10-Q under the rules and regulations of the United States Securities and Exchange Commission. As an interim period filing presented using a condensed format, it does not include all of the disclosures required by U.S. generally accepted accounting principles, and you should read this report along with our 2010 Annual Report on Form 10-K. The financial statements as of March 31, 2011, and for the quarters ended March 31, 2011 and 2010, are unaudited. The condensed consolidated balance sheet as of December 31, 2010, was derived from the audited balance sheet filed in our 2010 Annual Report on Form 10-K. In our opinion, we have made adjustments, all of which are of a normal, recurring nature to fairly present our interim period results. Due to the seasonal nature of our business, information for interim periods may not be indicative of our operating results for the entire year. Our disclosures in this Form 10-Q are an update to those provided in our 2010 Annual Report on Form 10-K.





Significant Accounting Policies





There were no changes in the significant accounting policies described in our 2010 Annual Report on Form 10-K and no significant accounting pronouncements issued but not yet adopted as of March 31, 2011.





2. Financial Instruments


At March 31, 2011 and December 31, 2010, the carrying amounts of cash and cash equivalents and trade receivables and payables represent fair value because of the short-term nature of these instruments. At March 31, 2011 and December 31, 2010, we had an interest bearing note receivable from El Paso Corporation (El Paso) of $867 million and $836 million due upon demand, with a variable interest rate of 1.5% at each balance sheet date. While we are exposed to changes in interest income based on changes to the variable interest rate, the fair value of this note receivable approximates its carrying value due to the note being due on demand and the market-based nature of the interest rate.




In addition, the carrying amounts of our long-term debt and their estimated fair values, which are based on quoted market prices for the same or similar issues, are as follows:





March 31, 2011


December 31, 2010Carrying

Amount


Fair

Value


Carrying

Amount


Fair

Value(In millions)Long-term debt, including current maturities

$
1,113


$
1,251


$
1,113


$
1,258





3. Commitments and Contingencies





Legal Proceedings





Bank of America. We are a named defendant, along with Burlington Resources, Inc. (Burlington), now a subsidiary of ConocoPhillips Company, in a class action lawsuit styledBank of America, et al. v. El Paso Natural Gas and Burlington Resources Oil and Gas Company, L.P., filed in October 2003 in the District Court of Kiowa County, Oklahoma asserting royalty underpayment claims related to specified shallow wells in Oklahoma, Texas and New Mexico. The Plaintiffs assert that royalties were underpaid starting in the 1980s when the purchase price of gas was lowered below the Natural Gas Policy Act maximum lawful prices.  The Plaintiffs have not alleged an amount of damages against any defendant.  We believe that our actions in the 1980s were proper in light of a declining market.  We also contend that we are entitled to an indemnity from Burlington under our 1992 separation agreement for all claims related to royalty payments, which Burlington denies.  The Plaintiffs assert that royalties were further underpaid by Burlington as a result of post-production cost deductions taken starting in the late 1990s.  We have no liability for the post-production claims as they pertain to periods after our separation from Burlington.  This action was transferred to Washita County District Court in 2004. A tentative settlement reached in November 2005 was rejected by the court in June 2007. A class certification hearing occurred in April 2009.  The court certified a Texas and Oklahoma class of royalty owners and stayed the claims pertaining to New Mexico wells.  The class certification has been appealed to the Oklahoma Court of Appeals. The Plaintiffs have proceeded with discovery of the post-production claims against Burlington.  Our costs and legal exposure related to this lawsuit are not currently determinable.





4
 Table of Contents


In addition to the above proceeding, we and our affiliates are named defendants in numerous legal proceedings and claims that arise in the ordinary course of our business. For each of these matters, we evaluate the merits of the case or claim, our exposure to the matter, possible legal or settlement strategies and the likelihood of an unfavorable outcome. If we determine that an unfavorable outcome is probable and can be estimated, we establish the necessary accruals. While the outcome of these matters, including those discussed above, cannot be predicted with certainty, and there are still uncertainties related to the costs we may incur, based upon our evaluation and experience to date, we believe we have established appropriate reserves for these matters. It is possible, however, that new information or future developments could require us to reassess our potential exposure related to these matters and adjust our accruals accordingly, and these adjustments could be material. As of March 31, 2011, we had approximately $8 million accrued, which has not been reduced by $8 million of related insurance receivables, for all of our outstanding legal proceedings.





Environmental Matters





We are subject to federal, state and local laws and regulations governing environmental quality and pollution control. These laws and regulations require us to remove or remedy the effect of the disposal or release of specified substances at current and former operating sites. At March 31, 2011, our accrual was approximately $15 million for expected remediation costs and associated onsite, offsite and groundwater technical studies and for related environmental legal costs; however, we estimate that our exposure could be as high as $29 million. Our accrual includes $14 million for environmental contingencies related to properties we previously owned.





Our environmental remediation projects are in various stages of completion. Our recorded liabilities reflect our current estimates of amounts we will spend to remediate these sites. However, depending on the stage of completion or assessment, the ultimate extent of contamination or remediation required may not be known. As additional assessments occur or remediation efforts continue, we may incur additional liabilities.





Superfund Matters. Included in our recorded environmental liabilities are projects where we have received notice that we have been designated or could be designated as a Potentially Responsible Party (PRP) under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), commonly known as Superfund, or state equivalents for three active sites. Liability under the federal CERCLA statute may be joint and several, meaning that we could be required to pay in excess of our pro rata share of remediation costs. We consider the financial strength of other PRPs in estimating our liabilities. Accruals for these issues are included in the environmental reserve discussed above.





For 2011, we estimate that our total remediation expenditures will be approximately $3 million, most of which will be expended under government directed clean-up plans.  In addition, we expect to make capital expenditures for environmental matters of approximately $3 million in the aggregate for the remainder of 2011 through 2015, including capital expenditures associated with the impact of the Environmental Protection Agency (EPA) rule on emissions of hazardous air pollutants from reciprocating internal combustion engines which are subject to regulations with which we have to be in compliance by October 2013.





It is possible that new information or future developments could require us to reassess our potential exposure related to environmental matters. We may incur significant costs and liabilities in order to comply with existing environmental laws and regulations. It is also possible that other developments, such as increasingly strict environmental laws, regulations and orders of regulatory agencies, as well as claims for damages to property and the environment or injuries to employees and other persons resulting from our current or past operations, could result in substantial costs and liabilities in the future. As this information becomes available, or other relevant developments occur, we will adjust our accrual amounts accordingly. While there are still uncertainties related to the ultimate costs we may incur, based upon our evaluation and experience to date, we believe our reserves are adequate.















5
 Table of Contents


Rates and Regulatory Matters





EPNG Rate Case. In April 2010, the Federal Energy Regulatory Commission (FERC) approved an uncontested partial offer of settlement which increased our base tariff rates, effective January 1, 2009.  As part of the settlement, we made refunds of approximately $76 million, plus interest, in 2010.  The settlement resolved all but four issues in the proceeding.  In January 2011, the Presiding Administrative Law Judge issued a decision that for the most part found against us on the four issues.  We will appeal those decisions to the FERC and may also seek review of any of the FERC’s decisions to the U.S. Court of Appeals.  Although the final outcome is not currently determinable, we believe our accruals established for this matter are adequate based on the expected final outcome.





In September 2010, we filed a new rate case with the FERC proposing an increase in base tariff rates as permitted under the settlement of the previous rate case.  In October 2010, the FERC issued an order accepting and suspending the effective date of the proposed rates to April 1, 2011, subject to refund, the outcome of a hearing and other proceedings.  At this time, the outcome of this matter is not determinable.





Other Regulatory Matter.In October 2010, we filed with the FERC to permanently abandon two compressor stations and temporarily idle nine compressor stations along our south mainline system in 2011.  This was done to better align our capacity to the current lower level of contract demand resulting from, in part, the weakened economic conditions along this line.  Our intent is to bring the idled facilities back into service over the next several years as market demand improves.  In our 2011 rate case, we did not seek to earn a return on the original investment in the idled facilities.  We will continue to incur related operating costs and depreciation expense until the compressor stations are idled.  In April 2011, the FERC denied our request to temporarily idle the nine compressor stations.  Currently, we are evaluating whether to appeal the FERC’s decision and the outcome is uncertain.





Other Matter





Tuba City Uranium Milling Facility. For a period of approximately ten years beginning in the mid to late 1950s, Rare Metals Corporation of America, a historical affiliate, conducted uranium mining and milling operations in the vicinity of Tuba City, Arizona, under a contract with the United States government as part of the Cold War nuclear program. The site of the Tuba City uranium mill, which is on land within the Navajo Indian Reservation, reverted to the Navajo Nation after the mill closed in 1966. The tailings at the mill site were encapsulated and a ground water remediation system was installed by the U.S. Department of Energy (DOE) under the Federal Uranium Mill Tailings Radiation Control Act of 1978. In May 2007, we filed suit against the DOE and other federal agencies requesting a judicial determination that the DOE was fully and legally responsible for any remediation of any waste associated with historical uranium production activity at two sites in the vicinity of the mill facilities near Tuba City, Arizona. In March 2009, the United States District Court for the District of Columbia issued an opinion dismissing one of our claims, which has been affirmed by the Court of Appeals for the D.C. Circuit. Also in March 2009, following our close cooperation with the Navajo Nation in joint legislative efforts, President Obama signed the Fiscal Year 2009 Omnibus Appropriations Act, which appropriated $5 million toward the final remediation by the DOE of one of the two sites that are the subject of our lawsuit. The DOE has assigned to the Navajo Nation the obligation to remediate the site. We anticipate that the Navajo Nation will perform the remediation in the near future, and we are continuing to maintain the interim exposure control measures we have installed at the site.  Additionally, the EPA and Bureau of Indian Affairs (BIA) have entered into an administrative order of consent, pursuant to which the BIA will conduct a remedial investigation/feasibility study at the second site involved in the lawsuit.  Finally, the EPA is currently assessing the environmental condition of all former uranium mines on the Navajo Indian Reservation to determine the need for further environmental response activities.  There are approximately 500 abandoned uranium mine sites on the Navajo Indian Reservation, 16 of which were operated by the historical affiliate.





While the outcome of these matters cannot be predicted with certainty, based on current information, we do not expect the ultimate resolution of these matters to have a material adverse effect on our financial position, operating results or cash flows. It is possible that new information or future developments could require us to reassess our potential exposure related to these matters. The impact of these changes may have a material effect on our results of operations, our financial position, and our cash flows in the periods these events occur.











6
 Table of Contents





4.  Accounts Receivable Sales Program





We participate in an accounts receivable sales program where we sell receivables in their entirety to a third party financial institution (through a wholly-owned special purpose entity).  The sale of these accounts receivable (which are short-term assets that generally settle within 60 days) qualify for sale accounting.  The third party financial institution involved in our accounts receivable sales program acquires interests in various financial assets and issues commercial paper to fund those acquisitions.  We do not consolidate the third party financial institution because we do not have the power to control, direct or exert significant influence over its overall activities since our receivables do not comprise a significant portion of its operations.





In connection with our accounts receivable sales, we receive a portion of the sales proceeds up front and receive an additional amount upon the collection of the underlying receivables (which we refer to as a deferred purchase price).  Our ability to recover the deferred purchase price is based solely on the collection of the underlying receivables.  The table below contains information related to our accounts receivable sales program.





Quarter Ended

March 31,2011


2010(In millions)Accounts receivable sold to the third-party financial institution(1)

$
128


$
156Cash received for accounts receivable sold under the program


76



93Deferred purchase price related to accounts receivable sold


52



63Cash received related to the deferred purchase price


44



44
  (1) During the quarters ended March 31, 2011 and 2010, losses recognized on the sale of accounts receivable were immaterial.  March 31,



December 31,2011



2010(In millions)Accounts receivable sold and held by third-party financial institution

$
45


$
42Uncollected deferred purchase price related to accounts receivable sold(1)


21



13


____________


(1)  Initially recorded at an amount which approximates its fair value using observable inputs other than quoted prices in active markets.





The deferred purchase price related to the accounts receivable sold is reflected as other accounts receivable on our balance sheet.  Because the cash received up front and the deferred purchase price relate to the sale or ultimate collection of the underlying receivables, and are not subject to significant other risks given their short term nature, we reflect all cash flows under the accounts receivable sales program as operating cash flows on our statement of cash flows.  Under the accounts receivable sales program, we service the underlying receivables for a fee.  The fair value of this servicing agreement, as well as the fees earned, were not material to our financial statements for the quarters ended March 31, 2011 and 2010.





5. Transactions with Affiliates





Cash Management Program.  We participate in El Paso’s cash management program which matches short-term cash surpluses and needs of participating affiliates, thus minimizing total borrowings from outside sources. El Paso uses the cash management program to settle intercompany transactions between participating affiliates. We have historically advanced cash to El Paso in exchange for an affiliated note receivable that is due upon demand.  At March 31, 2011 and December 31, 2010, we had a note receivable from El Paso of $867 million and $836 million. At March 31, 2011, we have classified this receivable as noncurrent on our balance sheet as we do not anticipate using it in the next twelve months considering available cash sources and needs.  The interest rate on this note is variable and was 1.5% at March 31, 2011 and December 31, 2010.





In the first quarter of 2011, we utilized $21 million of our notes receivable from the cash management program to pay a dividend to our parent.




7
 Table of Contents





Income Taxes.  El Paso files consolidated U.S. federal and certain state tax returns which include our taxable income. In certain states, we file and pay taxes directly to the state taxing authorities. At March 31, 2011 and December 31, 2010, we had federal and state income taxes payable of $34 million and $24 million. The majority of these balances, as well as our deferred income taxes, will become payable to El Paso.





Other Affiliate Balances.  At March 31, 2011 and December 31, 2010, we had contractual deposits from our affiliates of $9 million included in other current liabilities on our balance sheets.





Affiliate Revenues and Expenses. We enter into transactions with our affiliates within the ordinary course of business. For a further discussion of our affiliated transactions, see our 2010 Annual Report on Form 10-K. The following table shows revenues and charges from our affiliates for the quarters ended March 31:





2011


2010(In millions)Revenues

$
4


$
5Operation and maintenance expenses


18



18Reimbursements of operating expenses


2



2
































8
 Table of Contents





Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations





The information required by this Item is presented in a reduced disclosure format pursuant to General Instruction H to Form 10-Q. In addition, this Item updates, and should be read in conjunction with the information disclosed in our 2010 Annual Report on Form 10-K, and the financial statements and notes presented in Item 1 of this Quarterly Report on Form 10-Q.





Results of Operations





Beginning January 1, 2011, our management uses segment earnings before interest expense and income taxes (Segment EBIT) as a measure to assess the operating results and effectiveness of our business. We believe Segment EBIT is useful to investors to provide them with the same measure used by our management to evaluate our performance and so that investors may evaluate our operating results without regard to our financing methods.  We define Segment EBIT as net income adjusted for items such as (i) interest and debt expense, (ii) affiliated interest income, and (iii) income taxes.  Segment EBIT may not be comparable to measures used by other companies. Additionally, Segment EBIT should be considered in conjunction with net income, income before income taxes and other performance measures such as operating income or operating cash flows. Below is a reconciliation of our Segment EBIT to net income, our throughput volumes and an analysis and discussion of our results for the quarter ended March 31, 2011 compared with the same period in 2010.





Operating Results:

2011


2010(In millions,

except for volumes)Operating revenues

$
124


$
145Operating expenses


(77
)


(73
)Operating income


47



72Other income (expense), net


1



(1
)Segment EBIT


48



71Interest and debt expense


(22
)


(23
)Affiliated interest income, net


3



4Income taxes


(11
)


(20
)Net income

$
18


$
32Throughput volumes (BBtu/d)(1)


3,054



3,340


____________


(1)
Throughput volumes exclude throughput transported by the Mojave system on behalf of EPNG.




VarianceSegment EBIT Analysis:

Operating

Revenue


Operating

Expense


Other


TotalFavorable/(Unfavorable)(In millions)Reservation and other services revenues

$
(21
)

$
—


$
—


$
(21
)Operating and general and administrative expenses


—



(3
)


—



(3
)Other(1)


—



(1
)


2



1Total impact on Segment EBIT

$
(21
)

$
(4
)

$
2


$
(23
)


____________


(1)
Consists of individually insignificant items.





Reservation and Other Services Revenues.  During the quarter ended March 31, 2011, our reservation and other services revenues decreased due to the nonrenewal of expiring contracts as a result of reduced basis differentials and lower throughput volumes as a result of storage withdrawals in California and increased competition in our California and Arizona market areas which unfavorably impacted our Segment EBIT by $21 million when compared with the prior period.





Operating and General and Administrative Expenses.  During the first quarter of 2010, we received an insurance reimbursement of approximately $3 million related to a litigation matter settled in 2009.





9
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Regulatory Matters





EPNG Rate Case.  In April 2010, the FERC approved an uncontested partial offer of settlement which increased our base tariff rates effective January 1, 2009.  As part of the settlement we made refunds of approximately $76 million, plus interest, in 2010.  The settlement resolved all but four issues in the proceeding.  In January 2011, the Presiding Administrative Law Judge issued a decision that for the most part found against us on the four issues.  We will appeal those decisions to the FERC and may also seek review of any of the FERC’s decisions to the U.S. Court of Appeals.  Although the final outcome is not currently determinable, we believe our accruals established for this matter are adequate based on the expected final outcome.





In September 2010, we filed a new rate case with the FERC proposing an increase in base tariff rates as permitted under the settlement of the previous rate case.  These new base tariff rates would increase revenue by approximately $100 million annually over previously effective tariff rates.  In October 2010, the FERC issued an order accepting and suspending the effective date of the proposed rates to April 1, 2011, subject to refund, the outcome of a hearing and other proceedings.  At this time, the outcome of this matter is not determinable.





Although these rate cases are intended to address significant factors leading to the loss in revenues or increased costs, they will not eliminate all ongoing business risks.





Other Regulatory Matter.In October 2010, we filed with the FERC to permanently abandon two compressor stations and temporarily idle nine compressor stations along our south mainline system in 2011.  This was done to better align our capacity to the current lower level of contract demand resulting from, in part, the weakened economic conditions along this line.  Our intent is to bring the idled facilities back into service over the next several years as market demand improves.  In our 2011 rate case, we did not seek to earn a return on the original investment in the idled facilities.  We will continue to incur related operating costs and depreciation expense until the compressor stations are idled.  In April 2011, the FERC denied our request to temporarily idle the nine compressor stations.  Currently, we are evaluating whether to appeal the FERC’s decision and the outcome is uncertain.





Affiliated Interest Income, Net





Affiliated interest income, net for the quarter ended March 31, 2011 was lower than the same period in 2010 due to lower average advances. The following table shows the average advances due from El Paso and the average short-term interest rates for the quarters ended March 31:





2011


2010(In billions, except for rates)Average advance due from El Paso

$
0.8


$
1.1Average short-term interest rate


1.5
%


1.5
%





Income Taxes





Our effective tax rate of 38 percent for the quarters ended March 31, 2011 and 2010 was higher than the statutory rate of 35 percent primarily due to the effect of state income taxes.




















10
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Liquidity and Capital Resources





Our primary sources of liquidity are cash flows from operating activities and amounts available to us under El Paso’s cash management program while our primary uses of cash are for working capital, capital expenditures and debt service requirements. At March 31, 2011, we had a note receivable from El Paso of $867 million.  We do not intend to settle any amounts owed under this note within the next twelve months and therefore classified it as non-current on our balance sheet.  We periodically evaluate our operating cash flows, after consideration of our capital and other requirements, to determine potential discretionary dividends of our note receivable to our parent.  Based on our evaluation, during the first quarter of 2011, we utilized $21 million of our note receivable from the cash management program to pay a dividend to our parent.  See Item 1, Financial Statements, Note 5, for a further discussion of El Paso’s cash management program.





For the quarter ended March 31, 2011 compared with the same period in 2010, our operating cash flows decreased by approximately $37 million primarily due to lower reservation revenues and the acceleration of the collection of accounts receivable in the first quarter of 2010 due to entering into the accounts receivable sales program.





Our cash capital expenditures for the quarter ended March 31, 2011 and our estimated capital expenditures for the remainder of this year to expand and maintain our systems are listed below:





Quarter Ended

March 31, 2011


2011

Remaining


Total(In millions)Maintenance

$
23


$
65


$
88Expansion


—



2



2$
23


$
67


$
90







We believe we have adequate liquidity available to us to meet our capital requirements and our existing operating needs through cash flows from operating activities and amounts available to us under El Paso’s cash management program.  In addition to the cash management program above, we are eligible to borrow amounts available under El Paso’s $1.5 billion credit agreement and are only liable for amounts we directly borrow. As of March 31, 2011, El Paso had $909 million of capacity remaining and available to us and our affiliates under this credit agreement, and none of the amount outstanding under the facility was issued or borrowed by us.  For a further discussion of this credit agreement, see our 2010 Annual Report on Form 10-K.  While we do not anticipate a need to directly access the financial markets in the remainder of 2011 for any of our operating activities or expansion capital needs based on liquidity available to us, market conditions may impact our ability to act opportunistically.






































11
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Commitments and Contingencies





For a further discussion of our commitments and contingencies, see Item 1, Financial Statements, Note 3 which is incorporated herein by reference and our 2010 Annual Report on Form 10-K.





Item 3. Quantitative and Qualitative Disclosures About Market Risk





Omitted from this report pursuant to the reduced disclosure format permitted by General Instruction H to Form 10-Q.





Item 4. Controls and Procedures





Evaluation of Disclosure Controls and Procedures





As of March 31, 2011, we carried out an evaluation under the supervision and with the participation of our management, including our President and Chief Financial Officer (CFO), as to the effectiveness, design and operation of our disclosure controls and procedures. This evaluation considered the various processes carried out under the direction of our disclosure committee in an effort to ensure that information required to be disclosed in the U.S. Securities and Exchange Commission reports we file or submit under the Securities Exchange Act of 1934, as amended (Exchange Act) is accurate, complete and timely. Our management, including our President and CFO, does not expect that our disclosure controls and procedures or our internal controls will prevent and/or detect all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within our company have been detected. Our disclosure controls and procedures are designed to provide reasonable assurance of achieving their objectives and our President and CFO concluded that our disclosure controls and procedures (as defined in Exchange Act Rules 13a – 15(e) and 15d – 15(e)) were effective as of March 31, 2011.





Changes in Internal Control Over Financial Reporting





There were no changes in our internal control over financial reporting during the first quarter of 2011 that have materially affected or are reasonably likely to materially affect our internal control over financial reporting.




































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PART II — OTHER INFORMATION





Item 1. Legal Proceedings





See Part I, Item 1, Financial Statements, Note 3, which is incorporated herein by reference.





Item 1A. Risk Factors





CAUTIONARY STATEMENTS FOR PURPOSES OF THE “SAFE HARBOR” PROVISIONS OF


THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995





This report contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on assumptions or beliefs that we believe to be reasonable; however, assumed facts almost always vary from actual results, and differences between assumed facts and actual results can be material, depending upon the circumstances. Where, based on assumptions, we or our management express an expectation or belief as to future results, that expectation or belief is expressed in good faith and is believed to have a reasonable basis. We cannot assure you, however, that the stated expectation or belief will occur, be achieved or accomplished. The words “believe,” “expect,” “estimate,” “anticipate,” and similar expressions will generally identify forward-looking statements. All of our forward-looking statements, whether written or oral, are expressly qualified by these cautionary statements and any other cautionary statements that may accompany such forward-looking statements. In addition, we disclaim any obligation to update any forward-looking statements to reflect events or circumstances after the date of this report.





Important factors that could cause actual results to differ materially from estimates or projections contained in forward-looking statements are described in our 2010 Annual Report on Form 10-K under Part I, Item 1A, Risk Factors. There have been no material changes in these risk factors since that report.





Item 2. Unregistered Sales of Equity Securities and Use of Proceeds





Omitted from this report pursuant to the reduced disclosure format permitted by General Instruction H to Form 10-Q.





Item 3. Defaults Upon Senior Securities





Omitted from this report pursuant to the reduced disclosure format permitted by General Instruction H to Form 10-Q.





Item 4. (Removed and Reserved)








Item 5. Other Information





None.

































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Item 6. Exhibits





The Exhibit Index is incorporated herein by reference.





The agreements included as exhibits to this report are intended to provide information regarding their terms and not to provide any other factual or disclosure information about us or the other parties to the agreements. The agreements may contain representations and warranties by the parties to the agreements, including us, solely for the benefit of the other parties to the applicable agreement and:


•
should not in all instances be treated as categorical statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate;•
may have been qualified by disclosures that were made to the other party in connection with the negotiation of the applicable agreement, which disclosures are not necessarily reflected in the agreement;•
may apply standards of materiality in a way that is different from what may be viewed as material to certain investors; and•
were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement and are subject to more recent developments.


Accordingly, these representations and warranties may not describe the actual state of affairs as of the date they were made or at any other time.








































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SIGNATURES





Pursuant to the requirements of the Securities Exchange Act of 1934, El Paso Natural Gas Company has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.








EL PASO NATURAL GAS COMPANYDate: May 6, 2011
/s/ James J. ClearyJames J. Cleary

President

(Principal Executive Officer)Date: May 6, 2011
/s/ John R. SultJohn R. Sult

Executive Vice President and

Chief Financial Officer

(Principal Financial Officer)






















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EL PASO NATURAL GAS COMPANY





EXHIBIT INDEX





Each exhibit identified below is filed as a part of this report.





Exhibit

Number
Description31.A
Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.31.B
Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.32.A
Certification of Principal Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.32.B
Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.










































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