UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

             (Date of report)                       MAY 4, 2006
             (Date of earliest event reported)      APRIL 28, 2006

                         NORTHERN BORDER PARTNERS, L.P.
             (Exact name of registrant as specified in its charter)


          DELAWARE                      1-12202                   93-1120873
(State or other jurisdiction          (Commission               (IRS Employer
      of incorporation)               File Number)           Identification No.)


                       13710 FNB PARKWAY, OMAHA, NEBRASKA
                    (Address of principal executive offices)

                                   68154-5200
                                   (Zip code)

                                 (402) 492-7300
              (Registrant's telephone number, including area code)

                                 NOT APPLICABLE
          (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[ ] Written communication pursuant to Rule 425 under the Securities Act
    (17 CFR 230.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Securities Act
    (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))


ITEM 2.03  CREATION OF A DIRECT FINANCIAL OBLIGATION OR AN OBLIGATION UNDER AN
           OFF-BALANCE SHEET ARRANGEMENT OF A REGISTRANT.


           Guardian Financial Obligations

           On April 28, 2006, Northern Border Partners, L.P. acquired the
           remaining interests in Guardian bringing our ownership interest to
           100%.

           In November 2001, Guardian entered into a master shelf agreement with
           certain financial institutions that authorized the issuance of senior
           notes in an aggregate principal amount not to exceed $170 million.
           Between November 2001 and November 2002, Guardian issued ten senior
           notes with principal payments due annually beginning June 30, 2003
           through 2022. Interest rates on the notes range from 7.61 percent to
           8.27 percent with an average rate of 7.85 percent. As of May 4, 2006,
           approximately $154.5 million of these senior notes remain
           outstanding. Guardian cannot issue additional notes under this master
           shelf agreement.

           In November 2001, Guardian secured a $10 million credit line that
           authorized the issuance of senior floating rate revolving notes.
           These notes have a floating rate based on either a United States
           dollar prime commercial lending rate or certain United States deposit
           rates in the London interbank market plus a spread. At Guardian's
           option, these rates may be reset at one-month, three-month, or
           six-month periods. As of May 4, 2006, Guardian had one note
           outstanding under the credit line in the amount of $1.5 million, with
           an interest rate of 5.94 percent and due November 8, 2007.

           Guardian's master shelf and revolving note agreements contain certain
           financial, operational and legal covenants. Among other things,
           Guardian is required to maintain a minimum interest coverage ratio
           and a maximum debt ratio. The agreements require the maintenance of a
           ratio of (1) EBITDA (net income plus interest expense, income taxes
           and depreciation and amortization) to interest expense of not less
           than 1.5 to 1 and (2) total indebtedness to EBITDA of not greater
           than 6.75 to 1. Upon any breach of these covenants, amounts
           outstanding under the note agreements may become due and payable
           immediately by Guardian. The debt outstanding under these agreements
           is non-recourse to Northern Border Partners. At May 4, 2006, Guardian
           was in compliance with its financial covenants.


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ITEM 9.01  FINANCIAL STATEMENTS AND EXHIBITS.

           The total amount of securities of the Partnership authorized under
           any instrument with respect to long-term debt not filed as an exhibit
           does not exceed 10% of the total assets of the Partnership and its
           subsidiaries on a consolidated basis. The Partnership agrees, upon
           request of the Securities and Exchange Commission, to furnish copies
           of any or all of such instruments to the Securities and Exchange
           Commission.


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                                    SIGNATURE

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

                                                Northern Border Partners, L.P.

Date:  May 4, 2006                         By:  /s/ Jim Kneale
                                                --------------
                                                Jim Kneale
                                                Executive Vice President and
                                                Chief Financial Officer
                                                (Principal Financial Officer)


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