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 (Date of earliest event reported)  March 10, 2015

TC PipeLines, LP

(Exact name of registrant as specified in its charter)

Delaware	001-35358	52-2135448
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

700 Louisiana Street, Suite 700
Houston, Texas	77002-2761
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (877) 290-2772

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:

o  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

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

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

Item 1.01Entry into a Material Definitive Agreement

On March 10, 2015, TC PipeLines, LP (the “Partnership”) and TC PipeLines GP, Inc. entered into an underwriting agreement (the “Underwriting Agreement”) with SunTrust Robinson Humphrey, Inc. and RBS Securities Inc., as representatives for the several underwriters, relating to the sale of $350,000,000 aggregate principal amount of the Partnership’s 4.375% Senior Notes due 2025.

The Underwriting Agreement contains customary representations, warranties and agreements of the Partnership and certain affiliates, and customary conditions to closing, indemnification rights, obligations of the parties and termination provisions. The foregoing description of the Underwriting Agreement is qualified in its entirety by reference to the Underwriting Agreement, a copy of which is filed as Exhibit 1.1, and is incorporated herein by reference.

Item 8.01Other Events.

On March 13, 2015, the Partnership completed its sale of $350,000,000 aggregate principal amount of its 4.375% Senior Notes due 2025. For further information concerning the notes, refer to the exhibits attached to this report.

Item 9.01Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.
1.1	Underwriting Agreement, dated March 10, 2015 in connection with the offering of $350,000,000 aggregate principal amount of 4.375% Senior Notes due 2025.
4.1	Second Supplemental Indenture, dated as of March 13, 2015 relating to the issuance of $350,000,000 aggregate principal amount of 4.375% Senior Notes due 2025.
4.2	Specimen of 4.375% Senior Notes due 2025 (included as Exhibit A to the Supplemental Indenture filed as Exhibit 4.1).
5.1	Opinion of Orrick, Herrington & Sutcliffe LLP regarding the legality of the notes.
23.1	Consent of Orrick, Herrington & Sutcliffe LLP (included in Exhibit 5.1).

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SIGNATURES

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.

	TC PipeLines, LP
	By: TC PipeLines GP, Inc.,
	its general partner
	By:	/s/ Jon A. Dobson
Dated: March 13, 2015		Jon A. Dobson
		Secretary

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EXHIBIT INDEX

Exhibit No.
1.1	Underwriting Agreement, dated March 10, 2015 in connection with the offering of $350,000,000 aggregate principal amount of 4.375% Senior Notes due 2025.
4.1	Second Supplemental Indenture, dated as of March 13, 2015 relating to the issuance of $350,000,000 aggregate principal amount of 4.375% Senior Notes due 2025.
4.2	Specimen of 4.375% Senior Notes due 2025 (included as Exhibit A to the Supplemental Indenture filed as Exhibit 4.1).
5.1	Opinion of Orrick, Herrington & Sutcliffe LLP regarding the legality of the notes.
23.1	Consent of Orrick, Herrington & Sutcliffe LLP (included in Exhibit 5.1).

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