##### 









UNITED STATES


SECURITIES AND EXCHANGE COMMISSION


Washington, D.C. 20549





Form 10-K/A


(Amendment No. 1)


(Mark One)


x


ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)


OF THE SECURITIES EXCHANGE ACT OF 1934


For the fiscal year ended December 31, 2004


OR


o


TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)


OF THE SECURITIES EXCHANGE ACT OF 1934


For the transition period
from           to           .


Commission file number 1-7320


ANR Pipeline Company




|                                                                                                      |  |                                                   
|----------------------------------------------------------------------------------------------------- |  | --------------------------------------------------
|Delaware(State or other jurisdiction of
    incorporation or organization)                            |  | 38-1281775(I.R.S. Employer
    Identification No.)
|El Paso Building
    1001 Louisiana Street
    Houston, Texas(Address of principal executive offices) |  | 77002(Zip Code)                                   

Telephone Number: (713) 420-2600


Securities registered pursuant to Section 12(b) of the
Act:


|                                                                                        |  |  |  |                        
|--------------------------------------------------------------------------------------- |  |  |  | -----------------------
|                                                                                        |  |  |  | Name of each exchange  
|Title of each class                                                                     |  |  |  | on which registered    
|                                                                                        |  |  |  |                        
|9.625% Debentures, due 2021
    7.375% Debentures, due 2024 7% Debentures,
    due 2025 |  |  |  | New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:
None


þ o


þ


o þ


State the aggregate market
value of the voting stock held by non-affiliates of the
registrant: None


Indicate the number of shares
outstanding of each of the registrants classes of common
stock, as of the latest practicable date.




ANR PIPELINE COMPANY MEETS THE
CONDITIONS OF GENERAL INSTRUCTION I(1)(a) AND (b) TO
FORM 10-K AND IS THEREFORE FILING THIS REPORT WITH A
REDUCED DISCLOSURE FORMAT AS PERMITTED BY SUCH INSTRUCTION.


Documents Incorporated by Reference: None










---



##### 



EXPLANATORY NOTE






ii



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##### 



PART IV





ITEM 15. EXHIBITS AND FINANCIAL STATEMENT
SCHEDULES


(a) The following documents are filed as part of this
report:






|                                                        |  |      |    | 
|------------------------------------------------------- |  | ---- | -- | 
|                                                        |  | Page |   
|                                                        |  |      |   
|Consolidated Statements of Income                       |  |      | 16 | 
|Consolidated Balance Sheets                             |  |      | 17 | 
|Consolidated Statements of Cash Flows                   |  |      | 18 | 
|Consolidated Statements of Stockholders Equity         |  |      | 19 | 
|Notes to Consolidated Financial Statements              |  |      | 20 | 
|Report of Independent Registered Public Accounting Firm |  |      | 35 | 



|                                                 |                                                         |      |  |    | 
|------------------------------------------------ | ------------------------------------------------------- | ---- |  | -- | 
|                                                 |                                                         | Page | 
|                                                 |                                                         |      | 
|Great Lakes Gas Transmission Limited Partnership |                                                         |      |  |   
|                                                 | Report of Independent Registered Public Accounting Firm |      |  | 39 | 
|                                                 | Consolidated Statements of Income and Partners Capital |      |  | 40 | 
|                                                 | Consolidated Balance Sheets                             |      |  | 41 | 
|                                                 | Consolidated Statements of Cash Flows                   |      |  | 42 | 
|                                                 | Notes to Consolidated Financial Statements              |      |  | 43 | 



|                                                |  |  |    | 
|----------------------------------------------- |  |  | -- | 
|Schedule II  Valuation and Qualifying Accounts |  |  | 36 | 



| |                                                                                                                                                                     
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | All other schedules are omitted because they are not applicable,
    or the required information is disclosed in the financial
    statements or accompanying notes.

|                 |  |  |    | 
|---------------- |  |  | -- | 
|3. Exhibits list |  |  | 47 | 

38



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##### 



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


















39



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##### 



GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP


CONSOLIDATED STATEMENTS OF


INCOME AND PARTNERS CAPITAL


|                        |                                                              |                         |         |          |      |   |         |          |   |   |         |          |  
|----------------------- | ------------------------------------------------------------ | ----------------------- | ------- | -------- | ---- | - | ------- | -------- | - | - | ------- | -------- | -
|                        |                                                              | Years Ended December 31 |        
|                        |                                                              |                         |        
|                        |                                                              | 2004                    |         |          | 2003 |   |         | 2002     |  
|                        |                                                              |                         |         |          |      |   |         |          |  
|                        |                                                              | (Thousands of Dollars)  |        
|Transportation Revenues |                                                              | $                       | 284,327 |          |      | $ | 279,208 |          |   | $ | 277,515 |         
|Operating Expenses      |                                                              |                         |         |          |      |   |         |          |   |   |         |         
|                        | Operation and Maintenance                                    |                         |         | 34,723   |      |   |         | 43,052   |   |   |         | 37,075   |  
|                        | Depreciation                                                 |                         |         | 57,756   |      |   |         | 57,238   |   |   |         | 56,916   |  
|                        | Income Taxes Payable by Partners                             |                         |         | 47,058   |      |   |         | 40,530   |   |   |         | 45,400   |  
|                        | Property and Other Taxes                                     |                         |         | 23,265   |      |   |         | 24,929   |   |   |         | 14,393   |  
|                        |                                                              |                         |         |          |      |   |         |          |  
|                        |                                                              |                         | 162,802 |          |      |   | 165,749 |          |   |   | 153,784 |         
|                        |                                                              |                         |         |          |      |   |         |          |  
|Operating Income        |                                                              |                         | 121,525 |          |      |   | 113,459 |          |   |   | 123,731 |         
|Other Income (Expense)  |                                                              |                         |         |          |      |   |         |          |   |   |         |         
|                        | Interest on Long Term Debt                                   |                         |         | (37,718  | )    |   |         | (40,239  | ) |   |         | (44,539  | )
|                        | Other, Net                                                   |                         |         | 1,373    |      |   |         | 1,102    |   |   |         | 3,850    |  
|                        |                                                              |                         |         |          |      |   |         |          |  
|                        |                                                              |                         | (36,345 | )        |      |   | (39,137 | )        |   |   | (40,689 | )       
|                        |                                                              |                         |         |          |      |   |         |          |  
|Net Income              |                                                              | $                       | 85,180  |          |      | $ | 74,322  |          |   | $ | 83,042  |         
|                        |                                                              |                         |         |          |      |   |         |          |  
|Partners Capital       |                                                              |                         |         |          |      |   |         |          |   |   |         |         
|                        | Balance at Beginning of Year                                 |                         | $       | 452,007  |      |   |         | 445,512  |   |   |         | 443,640  |  
|                        | Contributions by General Partners                            |                         |         | 29,398   |      |   |         | 22,459   |   |   |         | 25,432   |  
|                        | Net Income                                                   |                         |         | 85,180   |      |   |         | 74,322   |   |   |         | 83,042   |  
|                        | Current Income Taxes Payable by Partners Charged to Earnings |                         |         | 31,536   |      |   |         | 24,238   |   |   |         | 27,801   |  
|                        | Distributions to Partners                                    |                         |         | (177,620 | )    |   |         | (114,524 | ) |   |         | (134,403 | )
|                        |                                                              |                         |         |          |      |   |         |          |  
|                        | Balance at End of Year                                       |                         | $       | 420,501  |      |   | $       | 452,007  |   |   | $       | 445,512  |  
|                        |                                                              |                         |         |          |      |   |         |          |  

The accompanying notes are an integral part of these
statements.


40



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##### 



GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP


CONSOLIDATED BALANCE SHEETS


|                                |                                             |                        |           |           |      |   |           |           | 
|------------------------------- | ------------------------------------------- | ---------------------- | --------- | --------- | ---- | - | --------- | --------- | 
|                                |                                             | As of December 31      |          
|                                |                                             |                        |          
|                                |                                             | 2004                   |           |           | 2003 |  
|                                |                                             |                        |           |           |      |  
|                                |                                             | (Thousands of Dollars) |          
|ASSETS                         
|Current Assets                  |                                             |                        |           |           |      |   |           |          
|                                | Cash and Cash Equivalents                   |                        | $         | 59,034    |      |   | $         | 40,156    | 
|                                | Accounts Receivable                         |                        |           | 44,137    |      |   |           | 34,747    | 
|                                | Materials and Supplies, at Average Cost     |                        |           | 10,043    |      |   |           | 10,020    | 
|                                | Prepayments and Other                       |                        |           | 5,146     |      |   |           | 3,511     | 
|                                |                                             |                        |           |           |      |  
|                                |                                             |                        | 118,360   |           |      |   | 88,434    |          
|Gas Utility Plant               |                                             |                        |           |           |      |   |           |          
|                                | Property, Plant and Equipment               |                        |           | 2,015,202 |      |   |           | 2,011,279 | 
|                                | Less Accumulated Depreciation               |                        |           | 919,287   |      |   |           | 870,356   | 
|                                |                                             |                        |           |           |      |  
|                                |                                             |                        | 1,095,915 |           |      |   | 1,140,923 |          
|                                |                                             |                        |           |           |      |  
|                                |                                             | $                      | 1,214,275 |           |      | $ | 1,229,357 |          
|                                |                                             |                        |           |           |      |  
|LIABILITIES & PARTNERS CAPITAL
|Current Liabilities             |                                             |                        |           |           |      |   |           |          
|                                | Current Maturities of Long Term Debt        |                        | $         | 10,000    |      |   | $         | 10,000    | 
|                                | Accounts Payable                            |                        |           | 27,984    |      |   |           | 14,850    | 
|                                | Property and Other Taxes                    |                        |           | 24,107    |      |   |           | 25,077    | 
|                                | Accrued Interest and Other                  |                        |           | 13,580    |      |   |           | 14,025    | 
|                                |                                             |                        |           |           |      |  
|                                |                                             |                        | 75,671    |           |      |   | 63,952    |          
|Long Term Debt                  |                                             |                        | 460,000   |           |      |   | 470,000   |          
|Other Liabilities               |                                             |                        |           |           |      |   |           |          
|                                | Amounts Equivalent to Deferred Income Taxes |                        |           | 256,959   |      |   |           | 241,281   | 
|                                | Other                                       |                        |           | 1,144     |      |   |           | 2,117     | 
|                                |                                             |                        |           |           |      |  
|                                |                                             |                        | 258,103   |           |      |   | 243,398   |          
|                                |                                             |                        |           |           |      |  
|Partners Capital               |                                             |                        | 420,501   |           |      |   | 452,007   |          
|                                |                                             |                        |           |           |      |  
|                                |                                             | $                      | 1,214,275 |           |      | $ | 1,229,357 |          
|                                |                                             |                        |           |           |      |  

The accompanying notes are an integral part of these
statements.


41



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##### 



GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP


CONSOLIDATED STATEMENTS OF CASH FLOWS


|                                                                                            |                                                              |                                                                  |                          |          |        |        |          |          |        |        |          |          |        |        |  
|------------------------------------------------------------------------------------------- | ------------------------------------------------------------ | ---------------------------------------------------------------- | ------------------------ | -------- | ------ | ------ | -------- | -------- | ------ | ------ | -------- | -------- | ------ | ------ | -
|                                                                                            |                                                              | Years Ended December 31                                          |                         
|                                                                                            |                                                              |                                                                  |                         
|                                                                                            |                                                              | 2004                                                             |                          |          | 2003   |        |          | 2002     |       
|                                                                                            |                                                              |                                                                  |                          |          |        |        |          |          |       
|                                                                                            |                                                              | (Thousands of Dollars)                                           |                         
|Cash Flow Increase (Decrease) from:                                                         |                                                              |                                                                  |                          |          |        |        |          |          |        |        |          |         
|Operating Activities                                                                        |                                                              |                                                                  |                          |          |        |        |          |          |        |        |          |         
|                                                                                            | Net Income                                                   |                                                                  | $                        | 85,180   |        |        | $        | 74,322   |        |        | $        | 83,042   |       
|                                                                                            | Adjustments to Reconcile Net Income to Operating Cash Flows: |                                                                  |                          |          |        |        |          |          |        |        |          |          |       
|                                                                                            |                                                              | Depreciation                                                     |                          |          | 57,756 |        |          |          | 57,238 |        |          |          | 56,916 |       
|                                                                                            |                                                              | Amounts Equivalent to Deferred Income Taxes                      |                          |          | 15,678 |        |          |          | 16,983 |        |          |          | 18,241 |       
|                                                                                            |                                                              | Allowance for Funds Used During Construction                     |                          |          | (157   | )      |          |          | (398   | )      |          |          | (500   | )     
|                                                                                            |                                                              | Changes in Current Assets and Liabilities:                       |                          |          |        |        |          |          |        |        |          |          |        |       
|                                                                                            |                                                              |                                                                  | Accounts Receivable      |          |        | (9,390 | )        |          |        | 1,529  |          |          |        | (6,250 | )
|                                                                                            |                                                              |                                                                  | Accounts Payable         |          |        | 13,134 |          |          |        | (1,642 | )        |          |        | 2,148  |  
|                                                                                            |                                                              |                                                                  | Property and Other Taxes |          |        | (970   | )        |          |        | (1,687 | )        |          |        | (1,131 | )
|                                                                                            |                                                              |                                                                  | Other                    |          |        | (3,076 | )        |          |        | (337   | )        |          |        | 678    |  
|                                                                                            |                                                              |                                                                  |                          |          |        |        |          |          |       
|                                                                                            |                                                              |                                                                  | 158,155                  |          |        |        | 146,008  |          |        |        | 153,144  |         
|Investment in Utility Plant                                                                 |                                                              |                                                                  | (12,591                  | )        |        |        | (27,277  | )        |        |        | (34,292  | )       
|Financing Activities                                                                        |                                                              |                                                                  |                          |          |        |        |          |          |        |        |          |         
|                                                                                            | Repayment of Long Term Debt                                  |                                                                  |                          | (10,000  | )      |        |          | (41,500  | )      |        |          | (47,250  | )     
|                                                                                            | Contributions by General Partners                            |                                                                  |                          | 29,398   |        |        |          | 22,459   |        |        |          | 25,432   |       
|                                                                                            | Current Income Taxes Payable by Partners Charged to Earnings |                                                                  |                          | 31,536   |        |        |          | 24,238   |        |        |          | 27,801   |       
|                                                                                            | Distribution to Partners                                     |                                                                  |                          | (177,620 | )      |        |          | (114,524 | )      |        |          | (134,403 | )     
|                                                                                            |                                                              |                                                                  |                          |          |        |        |          |          |       
|                                                                                            |                                                              |                                                                  | (126,686                 | )        |        |        | (109,327 | )        |        |        | (128,420 | )       
|Change in Cash and Cash Equivalents                                                         |                                                              |                                                                  | 18,878                   |          |        |        | 9,404    |          |        |        | (9,568   | )       
|Cash and Cash Equivalents:                                                                  |                                                              |                                                                  |                          |          |        |        |          |          |        |        |          |         
|                                                                                            | Beginning of Year                                            |                                                                  |                          | 40,156   |        |        |          | 30,752   |        |        |          | 40,320   |       
|                                                                                            |                                                              |                                                                  |                          |          |        |        |          |          |       
|                                                                                            | End of Year                                                  |                                                                  | $                        | 59,034   |        |        | $        | 40,156   |        |        | $        | 30,752   |       
|                                                                                            |                                                              |                                                                  |                          |          |        |        |          |          |       
|Supplemental Disclosure of Cash Flow Information
    Cash Paid During the Year for Interest |                                                              |                                                                  |                          |          |        |        |          |          |        |        |          |         
|                                                                                            |                                                              | (Net of Amounts Capitalized of $48, $150 and $214, Respectively) |                          | $        | 37,903 |        |          | $        | 40,576 |        |          | $        | 45,004 |       
|                                                                                            |                                                              |                                                                  |                          |          |        |        |          |          |       

The accompanying notes are an integral part of these
statements.


42



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##### 



GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




|  |                            
|- | ---------------------------
|1 | Organization and Management





|                         |                                                                                               |             |  |       |      |  |  |       | 
|------------------------ | --------------------------------------------------------------------------------------------- | ----------- |  | ----- | ---- |  |  | ----- | 
|                         |                                                                                               | Ownership % | 
|                         |                                                                                               |             | 
|Partner (Parent Company) |                                                                                               | 2004        |  |       | 2003 | 
|                         |                                                                                               |             |  |       |      | 
|General Partners:        |                                                                                               |             |  |       |      |  |  |      
|                         | El Paso Great Lakes, Inc. (El Paso Corporation)                                               |             |  | 46.61 |      |  |  | 46.33 | 
|                         | TransCanada GL, Inc. (TransCanada PipeLines Ltd.)                                             |             |  | 46.61 |      |  |  | 46.33 | 
|Limited Partner:         |                                                                                               |             |  |       |      |  |  |      
|                         | Great Lakes Gas Transmission Company (TransCanada PipeLines Ltd.
    and El Paso Corporation) |             |  | 6.78  |      |  |  | 7.34  | 



2     Summary of Significant
Accounting Policies


Principles of Consolidation and Basis of Presentation










Regulation


Accounting for the Effects of
Certain Types of Regulation


Accounts Receivable




43



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##### 





Gas Utility Plant and Depreciation






Asset Retirement Obligations




Income Taxes






3     Affiliated Company
Transactions




|                         |                                           |                |        |         |      |  |        |         |  |  |        |         | 
|------------------------ | ----------------------------------------- | -------------- | ------ | ------- | ---- |  | ------ | ------- |  |  | ------ | ------- | 
|                         |                                           | (In Thousands) |       
|                         |                                           |                |       
|                         |                                           | 2004           |        |         | 2003 |  |        | 2002    | 
|                         |                                           |                |        |         |      |  |        |         | 
|Accounts receivable      |                                           | $              | 12,827 |         |      |  | 16,062 |         |  |  | 15,989 |        
|Accounts payable         |                                           |                | 1,845  |         |      |  | 1,135  |         |  |  | 622    |        
|Transportation revenues: |                                           |                |        |         |      |  |        |         |  |  |        |        
|                         | TransCanada PipeLines Ltd. and affiliates |                |        | 164,810 |      |  |        | 166,578 |  |  |        | 163,442 | 
|                         | El Paso Corporation and affiliates        |                |        | 20,581  |      |  |        | 23,877  |  |  |        | 24,875  | 





44



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##### 







|                |  |                |          |   |      |  |            |      |  |  |            |  
|--------------- |  | -------------- | -------- | - | ---- |  | ---------- | ---- |  |  | ---------- | -
|                |  | (In Thousands) |         
|                |  |                |         
|                |  | 2004           |          |   | 2003 |  |            | 2002 | 
|                |  |                |          |   |      |  |            |      | 
|Pension         |  | $              | (743,000 | ) |      |  | (2,600,000 | )    |  |  | (5,400,000 | )
|Post-Retirement |  |                | 202,000  |   |      |  | 204,000    |      |  |  | 236,000    |  



|  |     
|- | ----
|4 | Debt

|                                                                                  |                                              |                |         |         |      |  |         |         | 
|--------------------------------------------------------------------------------- | -------------------------------------------- | -------------- | ------- | ------- | ---- |  | ------- | ------- | 
|                                                                                  |                                              | (In Thousands) |        
|                                                                                  |                                              |                |        
|                                                                                  |                                              | 2004           |         |         | 2003 | 
|                                                                                  |                                              |                |         |         |      | 
|Senior Notes, unsecured, interest due semiannually, principal
    due as follows: |                                              |                |         |         |      |  |         |        
|                                                                                  | 8.74% series, due 2003 to 2011               |                | $       | 70,000  |      |  |         | 80,000  | 
|                                                                                  | 9.09% series, due 2012 to 2021               |                |         | 100,000 |      |  |         | 100,000 | 
|                                                                                  | 6.73% series, due 2009 to 2018               |                |         | 90,000  |      |  |         | 90,000  | 
|                                                                                  | 6.95% series, due 2019 to 2028               |                |         | 110,000 |      |  |         | 110,000 | 
|                                                                                  | 8.08% series, due 2021 to 2030               |                |         | 100,000 |      |  |         | 100,000 | 
|                                                                                  |                                              |                |         |         |      | 
|                                                                                  |                                              |                | 470,000 |         |      |  | 480,000 |        
|                                                                                  | Less current maturities                      |                |         | 10,000  |      |  |         | 10,000  | 
|                                                                                  |                                              |                |         |         |      | 
|                                                                                  | Total long term debt less current maturities |                | $       | 460,000 |      |  |         | 470,000 | 
|                                                                                  |                                              |                |         |         |      | 







45



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|  |                                 
|- | --------------------------------
|5 | Income Taxes Payable by Partners



|         |         |                |        |        |      |  |        |        |  |  |        |        | 
|-------- | ------- | -------------- | ------ | ------ | ---- |  | ------ | ------ |  |  | ------ | ------ | 
|         |         | (In Thousands) |       
|         |         |                |       
|         |         | 2004           |        |        | 2003 |  |        | 2002   | 
|         |         |                |        |        |      |  |        |        | 
|Current  |         |                |        |        |      |  |        |        |  |  |        |       
|         | Federal |                | $      | 30,187 |      |  |        | 23,201 |  |  |        | 26,612 | 
|         | State   |                |        | 1,349  |      |  |        | 1,037  |  |  |        | 1,189  | 
|         |         |                |        |        |      |  |        |        | 
|         |         |                | 31,536 |        |      |  | 24,238 |        |  |  | 27,801 |       
|         |         |                |        |        |      |  |        |        | 
|Deferred |         |                |        |        |      |  |        |        |  |  |        |       
|         | Federal |                |        | 14,833 |      |  |        | 15,556 |  |  |        | 16,808 | 
|         | State   |                |        | 689    |      |  |        | 736    |  |  |        | 791    | 
|         |         |                |        |        |      |  |        |        | 
|         |         |                | 15,522 |        |      |  | 16,292 |        |  |  | 17,599 |       
|         |         |                |        |        |      |  |        |        | 
|         |         | $              | 47,058 |        |      |  | 40,530 |        |  |  | 45,400 |       
|         |         |                |        |        |      |  |        |        | 





|                                         |  |                |          |   |      |  |          |  
|---------------------------------------- |  | -------------- | -------- | - | ---- |  | -------- | -
|                                         |  | (In Thousands) |         
|                                         |  |                |         
|                                         |  | 2004           |          |   | 2003 | 
|                                         |  |                |          |   |      | 
|Deferred tax assets  other              |  | $              | 4,889    |   |      |  | 5,168    |  
|Deferred tax liabilities  utility plant |  |                | (245,786 | ) |      |  | (230,614 | )
|Deferred tax liabilities  other         |  |                | (16,062  | ) |      |  | (15,835  | )
|                                         |  |                |          |   |      | 
|Net deferred tax liability               |  | $              | (256,959 | ) |      |  | (241,281 | )
|                                         |  |                |          |   |      | 



|  |                
|- | ---------------
|6 | Severance Costs





|  |                
|- | ---------------
|7 | Use Tax Refunds



46



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##### 



ANR PIPELINE COMPANY


EXHIBIT LIST


December 31, 2004




|        |       |  |             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|------- | ----- |  | ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit |       |  |            
|Number  |       |  | Description
|        |       |  |            
|        | 3.A   |  |             | Amended and Restated Certificate of Incorporation dated
    March 7, 2002 (Exhibit 3.A to our 2001 Form 10-K).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|        | 3.B   |  |             | By-laws dated June 24, 2002 (Exhibit 3.B to our 2002
    Form 10-K).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|        | **4.A |  |             | Indenture dated as of February 15, 1994 and First
    Supplemental Indenture dated as of February 15, 1994.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|        | 4.B   |  |             | Indenture dated as of March 5, 2003 between ANR Pipeline
    Company and The Bank of New York Trust Company, N.A.,
    successor to The Bank of New York, as Trustee (Exhibit 4.1
    to our Form 8-K filed March 5, 2003).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|        | 10.A  |  |             | Amended and Restated Credit Agreement dated as of
    November 23, 2004, among El Paso Corporation, ANR
    Pipeline Company, Colorado Interstate Gas Company, El Paso
    Natural Gas Company, Tennessee Gas Pipeline Company, the several
    banks and other financial institutions from time to time parties
    thereto and JPMorgan Chase Bank, N.A., as administrative agent
    and as collateral agent (Exhibit 10.A to our Form 8-K
    filed November 29, 2004).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|        | 10.B  |  |             | Amended and Restated Security Agreement dated as of
    November 23, 2004, made by among El Paso Corporation, ANR
    Pipeline Company, Colorado Interstate Gas Company, El Paso
    Natural Gas Company, Tennessee Gas Pipeline Company, the
    Subsidiary Grantors and certain other credit parties thereto and
    JPMorgan Chase Bank, N.A., not in its individual capacity, but
    solely as collateral agent for the Secured Parties and as the
    depository bank (Exhibit 10.B to our Form 8-K filed
    November 29, 2004).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|        | 10.C  |  |             | $3,000,000,000 Revolving Credit Agreement dated as of
    April 16, 2003 among El Paso Corporation, El Paso Natural
    Gas Company, Tennessee Gas Pipeline Company and ANR Pipeline
    Company, as Borrowers, the Lenders Party thereto, and JPMorgan
    Chase Bank, as Administrative Agent, ABN Amro Bank N.V. and
    Citicorp North America, Inc., as Co-Document Agents, Bank of
    America, N.A. and Credit Suisse First Boston, as Co-Syndication
    Agents, J.P. Morgan Securities Inc. and Citigroup Global Markets
    Inc., as Joint Bookrunners and Co-Lead Arrangers.
    (Exhibit 99.1 to El Paso Corporations Form 8-K
    filed April 18, 2003); First Amendment to the
    $3,000,000,000 Revolving Credit Agreement and Waiver dated
    as of March 15, 2004 among El Paso Corporation, El Paso
    Natural Gas Company, Tennessee Gas Pipeline Company, ANR
    Pipeline Company and Colorado Interstate Gas Company, as
    Borrowers, the Lenders party thereto and JPMorgan Chase Bank, as
    Administrative Agent, ABN AMRO Bank N.V. and Citicorp North
    America, Inc., as Co-Documentation Agents, Bank of America, N.A.
    and Credit Suisse First Boston, as Co-Syndication Agents
    (Exhibit 10.A.1 to our 2003 First Quarter Form 10-Q);
    Second Waiver to the $3,000,000,000 Revolving Credit
    Agreement dated as of June 15, 2004 among El Paso
    Corporation, El Paso Natural Gas Company, Tennessee Gas Pipeline
    Company, ANR Pipeline Company and Colorado Interstate Gas
    Company, as Borrowers, the Lenders party thereto and JPMorgan
    Chase Bank, as Administrative Agent, ABN AMRO Bank N.V. and
    Citicorp North America, Inc., as

47



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##### 



|        |       |  |             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|------- | ----- |  | ----------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit |       |  |            
|Number  |       |  | Description
|        |       |  |            
|        |       |  |             | Co-Documentation Agents, Bank of America, N.A. and Credit Suisse
    First Boston, as Co-Syndication Agents (Exhibit 10.A.2 to
    our 2003 Second Quarter Form 10-Q); Second Amendment to the
    $3,000,000,000 Revolving Credit Agreement and Third Waiver
    dated as of August 6, 2004 among El Paso Corporation,
    El Paso Natural Gas Company, Tennessee Gas Pipeline
    Company, ANR Pipeline Company and Colorado Interstate Gas
    Company, as Borrowers, the Lenders party thereto and JPMorgan
    Chase Bank, as Administrative Agent, ABN AMRO Bank N.V. and
    Citicorp North America, Inc., as Co-Documentation Agents, Bank
    of America, N.A. and Credit Suisse First Boston, as
    Co-Syndication Agents. (Exhibit 99.B to our Form 8-K
    filed August 10, 2004).
|        | 21    |  |             | Omitted pursuant to the reduced disclosure format permitted by
    General Instruction I to Form 10-K.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|        | *31.A |  |             | Certification of Chief Executive Officer pursuant to
    sec. 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|        | *31.B |  |             | Certification of Chief Financial Officer pursuant to
    sec. 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|        | *32.A |  |             | Certification of Chief Executive Officer pursuant to
    18 U.S.C. sec. 1350 as adopted pursuant to
    sec. 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|        | *32.B |  |             | Certification of Chief Financial Officer pursuant to
    18 U.S.C. sec. 1350 as adopted pursuant to
    sec. 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

Undertaking




48



---



##### 






SIGNATURES






| |                     
| | --------------------
| | ANR PIPELINE COMPANY



| |    |                       
| | -- | ----------------------
| | By | /s/ Stephen C. Beasley

| |                                              
| | ---------------------------------------------
| |                                              
| | Stephen C. Beasley                           
| | Chairman of the Board, President and Director



|                                               |  |                                                                                                                         |  |                   |  |     
|---------------------------------------------- |  | ----------------------------------------------------------------------------------------------------------------------- |  | ----------------- |  | ----
|                                               |  | Signature                                                                                                               |  | Title             |  | Date
|                                               |  |                                                                                                                         |  |                   |  |     
|                                              
|/s/ Stephen C. Beasley(Stephen
    C. Beasley) |  | Chairman of the Board, President and Director (Principal
    Executive Officer)                                         |  | November 15, 2005
|                                              
|/s/ Greg G. Gruber(Greg
    G. Gruber)         |  | Senior Vice President, Chief Financial Officer, Treasurer and
    Director (Principal Financial and Accounting Officer) |  | November 15, 2005
|                                              
|/s/ Daniel B. Martin(Daniel
    B. Martin)     |  | Senior Vice President and Director                                                                                      |  | November 15, 2005

49



---



##### 



ANR PIPELINE COMPANY


EXHIBIT INDEX


December 31, 2004




|        |       |  |             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|------- | ----- |  | ----------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit |       |  |            
|Number  |       |  | Description
|        |       |  |            
|        | 3.A   |  |             | Amended and Restated Certificate of Incorporation dated
    March 7, 2002 (Exhibit 3.A to our 2001 Form 10-K).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|        | 3.B   |  |             | By-laws dated June 24, 2002 (Exhibit 3.B to our 2002
    Form 10-K).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|        | **4.A |  |             | Indenture dated as of February 15, 1994 and First
    Supplemental Indenture dated as of February 15, 1994.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|        | 4.B   |  |             | Indenture dated as of March 5, 2003 between ANR Pipeline
    Company and The Bank of New York Trust Company, N.A.,
    successor to The Bank of New York, as Trustee (Exhibit 4.1
    to our Form 8-K filed March 5, 2003).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|        | 10.A  |  |             | Amended and Restated Credit Agreement dated as of
    November 23, 2004, among El Paso Corporation, ANR Pipeline
    Company, Colorado Interstate Gas Company, El Paso Natural Gas
    Company, Tennessee Gas Pipeline Company, the several banks and
    other financial institutions from time to time parties thereto
    and JPMorgan Chase Bank, N.A., as administrative agent and as
    collateral agent (Exhibit 10.A to our Form 8-K filed
    November 29, 2004).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|        | 10.B  |  |             | Amended and Restated Security Agreement dated as of
    November 23, 2004, made by among El Paso Corporation, ANR
    Pipeline Company, Colorado Interstate Gas Company, El Paso
    Natural Gas Company, Tennessee Gas Pipeline Company, the
    Subsidiary Grantors and certain other credit parties thereto and
    JPMorgan Chase Bank, N.A., not in its individual capacity, but
    solely as collateral agent for the Secured Parties and as the
    depository bank (Exhibit 10.B to our Form 8-K filed
    November 29, 2004).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|        | 10.C  |  |             | $3,000,000,000 Revolving Credit Agreement dated as of
    April 16, 2003 among El Paso Corporation, El Paso Natural
    Gas Company, Tennessee Gas Pipeline Company and ANR Pipeline
    Company, as Borrowers, the Lenders Party thereto, and JPMorgan
    Chase Bank, as Administrative Agent, ABN Amro Bank N.V. and
    Citicorp North America, Inc., as Co-Document Agents, Bank of
    America, N.A. and Credit Suisse First Boston, as Co-Syndication
    Agents, J.P. Morgan Securities Inc. and Citigroup Global Markets
    Inc., as Joint Bookrunners and Co-Lead Arrangers.
    (Exhibit 99.1 to El Paso Corporations Form 8-K
    filed April 18, 2003); First Amendment to the
    $3,000,000,000 Revolving Credit Agreement and Waiver dated
    as of March 15, 2004 among El Paso Corporation, El Paso
    Natural Gas Company, Tennessee Gas Pipeline Company, ANR
    Pipeline Company and Colorado Interstate Gas Company, as
    Borrowers, the Lenders party thereto and JPMorgan Chase Bank, as
    Administrative Agent, ABN AMRO Bank N.V. and Citicorp North
    America, Inc., as Co- Documentation Agents, Bank of America,
    N.A. and Credit Suisse First Boston, as Co-Syndication Agents
    (Exhibit 10.A.1 to our 2003 First Quarter Form 10-Q);
    Second Waiver to the $3,000,000,000 Revolving Credit
    Agreement dated as of June 15, 2004 among El Paso
    Corporation, El Paso Natural Gas Company, Tennessee Gas Pipeline
    Company, ANR Pipeline Company and Colorado Interstate Gas
    Company, as Borrowers, the Lenders party thereto and JPMorgan
    Chase Bank, as Administrative Agent, ABN AMRO Bank N.V. and
    Citicorp North America, Inc., as Co-Documentation Agents, Bank
    of America, N.A. and Credit Suisse First Boston, as
    Co-Syndication Agents (Exhibit 10.A.2 to our 2003 Second
    Quarter Form 10-Q); Second



---



##### 



|        |       |  |             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|------- | ----- |  | ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit |       |  |            
|Number  |       |  | Description
|        |       |  |            
|        |       |  |             | Amendment to the $3,000,000,000 Revolving Credit Agreement
    and Third Waiver dated as of August 6, 2004 among El Paso
    Corporation, El Paso Natural Gas Company, Tennessee Gas Pipeline
    Company, ANR Pipeline Company and Colorado Interstate Gas
    Company, as Borrowers, the Lenders party thereto and JPMorgan
    Chase Bank, as Administrative Agent, ABN AMRO Bank N.V. and
    Citicorp North America, Inc., as Co-Documentation Agents, Bank
    of America, N.A. and Credit Suisse First Boston, as
    Co-Syndication Agents. (Exhibit 99.B to our Form 8-K
    filed August 10, 2004).
|        | 21    |  |             | Omitted pursuant to the reduced disclosure format permitted by
    General Instruction I to Form 10-K.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|        | *31.A |  |             | Certification of Chief Executive Officer pursuant to
    sec. 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|        | *31.B |  |             | Certification of Chief Financial Officer pursuant to
    sec. 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|        | *32.A |  |             | Certification of Chief Executive Officer pursuant to
    18 U.S.C. sec. 1350 as adopted pursuant to
    sec. 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|        | *32.B |  |             | Certification of Chief Financial Officer pursuant to
    18 U.S.C. sec. 1350 as adopted pursuant to
    sec. 906 of the Sarbanes-Oxley Act of 2002.