Table of Contents

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

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

For the quarterly period ended March 31, 2014

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:  001-35358

TC PipeLines, LP

(Exact name of registrant as specified in its charter)

877-290-2772

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes x                    No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes x                    No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o                    No x

As of April 29, 2014, there were 62,327,766 of the registrant’s common units outstanding.

Table of Contents

TC PIPELINES, LP

Page No.

TABLE OF CONTENTS

All amounts are stated in United States dollars unless otherwise indicated.

2

Table of Contents

DEFINITIONS

The abbreviations, acronyms, and industry terminology used in this quarterly report are defined as follows:

Unless the context clearly indicates otherwise, TC PipeLines, LP and its subsidiaries are collectively referred to in this quarterly report as “we,” “us,” “our” and “the Partnership.” We use “our pipeline systems” and “our pipelines” when referring to the Partnership’s ownership interests in Gas Transmission Northwest LLC (GTN), Northern Border Pipeline Company (Northern Border), Bison Pipeline LLC (Bison), Great Lakes Gas Transmission Limited Partnership (Great Lakes), North Baja Pipeline, LLC (North Baja) and Tuscarora Gas Transmission Company (Tuscarora).

3

Table of Contents

PART I

FORWARD-LOOKING STATEMENTS AND CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

This report includes certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements are identified by words and phrases such as: “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “forecast,” “should,” “predict,” “could,” “will,” “may,” and other terms and expressions of similar meaning. The absence of these words, however, does not mean that the statements are not forward-looking. These statements are based on management’s beliefs and assumptions and on currently available information and include, but are not limited to, statements regarding anticipated financial performance, future capital expenditures, liquidity, market or competitive conditions, regulations, organic or strategic growth opportunities, contract renewals and ability to market open capacity, business prospects, outcome of regulatory proceedings and cash distributions to unitholders.

Forward-looking statements involve risks and uncertainties that may cause actual results to differ materially from the results predicted. Factors that could cause actual results and our financial condition to differ materially from those contemplated in forward-looking statements include, but are not limited to:

These are not the only factors that could cause actual results to differ materially from those expressed or implied in any forward-looking statement. Other factors described elsewhere in this document, or factors that are unknown or unpredictable, could also have material adverse effects on future results. These and other risks are described in greater detail in Part I, Item 1A. “Risk Factors” in our Form 10-K for the year ended December 31, 2013. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors. All forward-looking statements are made only as of the date made and except as required by applicable law, we undertake no obligation to update any forward-looking statements to reflect new information, subsequent events or other changes.

4

Table of Contents

PART I – FINANCIAL INFORMATION

Item 1.                                 Financial Statements

TC PIPELINES, LP

CONSOLIDATED STATEMENT OF INCOME

(a)       Recast as discussed in Note 2.

TC PIPELINES, LP

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME

(a)       Recast as discussed in Note 2.

The accompanying notes are an integral part of these consolidated financial statements.

5

Table of Contents

TC PIPELINES, LP

CONSOLIDATED BALANCE SHEET

The accompanying notes are an integral part of these consolidated financial statements.

6

Table of Contents

TC PIPELINES, LP

CONSOLIDATED STATEMENT OF CASH FLOWS

(a)       Recast as discussed in Note 2.

The accompanying notes are an integral part of these consolidated financial statements.

7

Table of Contents

TC PIPELINES, LP

CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS’ EQUITY

(a)       Losses related to cash flow hedges reported in Accumulated Other Comprehensive Loss and expected to be reclassified to Net Income in the next 12 months are estimated to be $1 million. These estimates assume constant interest rates over time; however, the amounts reclassified will vary based on actual value of interest rates at the date of settlement.

The accompanying notes are an integral part of these consolidated financial statements.

8

Table of Contents

TC PIPELINES, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1        ORGANIZATION

TC PipeLines, LP and its subsidiaries are collectively referred to herein as the Partnership. The Partnership was formed by TransCanada PipeLines Limited, a wholly-owned subsidiary of TransCanada Corporation (TransCanada Corporation together with its subsidiaries collectively referred to herein as TransCanada), to acquire, own and participate in the management of energy infrastructure assets in North America.

NOTE 2        SIGNIFICANT ACCOUNTING POLICIES

The accompanying financial statements and related notes have been prepared in accordance with United States generally accepted accounting principles (GAAP) and amounts are stated in U.S. dollars. The results of operations for the three months ended March 31, 2014 and 2013 are not necessarily indicative of the results that may be expected for the full fiscal year. The accompanying financial statements should be read in conjunction with the financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2013. That report contains a more comprehensive summary of the Partnership’s major accounting policies. In the opinion of management, the accompanying financial statements contain all of the appropriate adjustments, all of which are normally recurring adjustments unless otherwise noted, considered necessary to present fairly the financial position of the Partnership, the results of operation and cash flows for the respective periods. Our significant accounting policies are consistent with those disclosed in Note 2 of the financial statements in our Annual Report on Form 10-K for the year ended December 31, 2013. Certain items from that Note are repeated or updated below as necessary to assist in understanding the accompanying financial statements.

(a) Basis of Presentation

The Partnership consolidates its investments in GTN, Bison, North Baja and Tuscarora, over which it is able to exercise control. To the extent there are interests owned by other parties, these interests are included in non-controlling interests. The Partnership uses the equity method of accounting for its investments in Northern Border and Great Lakes, over which it is able to exercise significant influence.

On July 1, 2013, the Partnership acquired an additional 45 percent membership interest in each of GTN and Bison (the 2013 Acquisition) from subsidiaries of TransCanada which resulted in a 70 percent ownership in each of GTN and Bison. The 2013 Acquisition was accounted for as a transaction between entities under common control, similar to a pooling of interests, whereby the assets and liabilities of GTN and Bison were recorded at TransCanada’s carrying value and the Partnership’s historical financial information was recast to consolidate GTN and Bison for all periods presented.

(b) Use of Estimates

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Although management believes these estimates are reasonable, actual results could differ from these estimates.

NOTE 3        INVESTMENTS IN UNCONSOLIDATED AFFILIATES

Northern Border and Great Lakes are regulated by FERC and are operated by TransCanada. The Partnership uses the equity method of accounting for its interests in its equity investees.

9

Table of Contents

(a)                Equity earnings from Northern Border is net of the 12-year amortization of a $10 million transaction fee paid to the operator of Northern Border at the time of the Partnership’s additional 20 percent interest acquisition in April 2006.

Northern Border

The Partnership recorded no undistributed earnings from Northern Border for the three months ended March 31, 2014 and 2013.

The summarized financial information for Northern Border is as follows:

Great Lakes

The Partnership made an equity contribution to Great Lakes of $4 million in the first quarter of 2014. This amount represents the Partnership’s 46.45 percent share of a $9 million cash call from Great Lakes to make a scheduled debt repayment.

The Partnership recorded no undistributed earnings from Great Lakes for the three months ended March 31, 2014 and 2013.

10

Table of Contents

The summarized financial information for Great Lakes is as follows:

NOTE 4        CREDIT FACILITIES AND LONG-TERM DEBT

The Partnership’s Senior Credit Facility consists of a $500 million senior revolving credit facility with a banking syndicate, maturing November 20, 2017, under which $370 million was outstanding at March 31, 2014 (December 31, 2013 - $380 million), leaving $130 million available for future borrowing.

The London Interbank Offered Rate (LIBOR) based interest rate on the Senior Credit Facility averaged 1.42 percent for the three months ended March 31, 2014 (2013 – 1.46 percent). The LIBOR-based interest rate was 1.41 percent at March 31, 2014 (December 31, 2013 – 1.42 percent).

The LIBOR-based interest rate on the Term Loan Facility averaged 1.42 percent for the three months ended March 31, 2014. After hedging activity, the interest rate incurred on the Term Loan Facility averaged 1.83 percent for three months ended March 31, 2014. Prior to hedging activities, the LIBOR-based interest rate was 1.41 percent at March 31, 2014 (December 31, 2013 – 1.42 percent).

GTN’s Senior Notes provisions contain a covenant that limits total debt to no greater than 70 percent of total capitalization.

11

Table of Contents

Series D Senior Notes are secured by Tuscarora’s transportation contracts, supporting agreements and substantially all of Tuscarora’s property. The note purchase agreements contain certain provisions that include, among other items, limitations on additional indebtedness and distributions to partners.

At March 31, 2014, the Partnership was in compliance with its financial covenants, in addition to the other covenants which include restrictions on entering into mergers, consolidations and sales of assets, granting liens, material amendments to the Second Amended and Restated Agreement of Limited Partnership (Partnership Agreement), incurring additional debt and distributions to unitholders.

The principal repayments required on the long-term debt are as follows:

NOTE 5        NET INCOME PER COMMON UNIT

Net income per common unit is computed by dividing net income attributable to controlling interests, after deduction of the General Partner’s allocation and net income attributed to GTN’s and Bison’s former parent, by the weighted average number of common units outstanding. The General Partner’s allocation is equal to an amount based upon the General Partner’s effective two percent general partner interest, plus an amount equal to incentive distributions. Incentive distributions are paid to the General Partner if quarterly cash distributions on the common units exceed levels specified in the Partnership Agreement.

Net income per common unit was determined as follows:

(a)       Recast as discussed in Note 2.

(b)       Net income allocated to partners excludes net income attributed to GTN’s and Bison’s former parent as it was allocated to TransCanada and was not allocable to either the general partner or common units.

NOTE 6        CASH DISTRIBUTIONS

For the three months ended March 31, 2014, the Partnership distributed $0.81 per common unit (2013 – $0.78 per common unit) for a total of $52 million (2013 - $43 million). The distributions paid for the three months ended March 31, 2014 and 2013 included no incentive distributions to the General Partner.

12

Table of Contents

NOTE 7        CHANGE IN OPERATING WORKING CAPITAL

(a)       Recast as discussed in Note 2.

NOTE 8        RELATED PARTY TRANSACTIONS

The Partnership does not have any employees. The management and operating functions are provided by the General Partner. The General Partner does not receive a management fee in connection with its management of the Partnership. The Partnership reimburses the General Partner for all costs of services provided, including the costs of employee, officer and director compensation and benefits, and all other expenses necessary or appropriate to the conduct of the business of, and allocable to, the Partnership. Such costs include (i) overhead costs (such as office space and equipment) and (ii) out-of-pocket expenses related to the provision of such services. The Partnership Agreement provides that the General Partner will determine the costs that are allocable to the Partnership in any reasonable manner determined by the General Partner in its sole discretion. Total costs charged to the Partnership by the General Partner were $1 million for the three months ended March 31, 2014 (2013 – $1 million).

As operator, TransCanada’s subsidiaries provide capital and operating services to our pipeline systems. TransCanada’s subsidiaries incur costs on behalf of our pipeline systems, including, but not limited to, employee salary and benefit costs, and property and liability insurance costs.

Capital and operating costs charged to our pipeline systems for the three months ended March 31, 2014 and 2013 by TransCanada’s subsidiaries and amounts payable to TransCanada’s subsidiaries at March 31, 2014 and December 31, 2013 are summarized in the following tables:

(a)       Represents 100 percent of the costs.

(b)       Recast as discussed in Note 2.

13

Table of Contents

(a)       Represents 100 percent of the costs.

Great Lakes’ earns transportation revenues from TransCanada and its affiliates under contracts, some of which are provided at discounted rates and some at maximum recourse rates. Great Lakes earned $22 million of transportation revenues under these contracts for the three months ended March 31, 2014 (2013 - $21 million). These amounts represent 47 percent of total revenues earned by Great Lakes for the three months ended March 31, 2014 (2013 – 59 percent).

Revenue from TransCanada and its affiliates of $11 million is included in the Partnership’s equity earnings from Great Lakes for the three months ended March 31, 2014 (2013 - $10 million). At March 31, 2014, $11 million was included in Great Lakes’ receivables in regards to the transportation contracts with TransCanada and its affiliates (December 31, 2013 - $11 million).

In 2013, the Partnership accrued $25 million of additional consideration in accordance with the 2013 Acquisition with respect to Carty Lateral. This amount was payable to a subsidiary of TransCanada and was included in accounts payable to affiliates as of March 31, 2014 and December 31, 2013. On April 11, 2014, the Partnership made a $25 million payment with respect to the Carty Lateral consideration. It was financed by cash on hand and a draw on the Senior Credit Facility.

NOTE 9        FAIR VALUE MEASUREMENTS

(a) Fair Value Hierarchy

Under Accounting Standards Codification (ASC) 820, Fair Value Measurements and Disclosures, fair value measurements are characterized in one of three levels based upon the input used to arrive at the measurement. The three levels of the fair value hierarchy are as follows:

·      Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access at the measurement date.

·      Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.

·      Level 3 inputs are unobservable inputs for the asset or liability.

When appropriate, valuations are adjusted for various factors including credit considerations. Such adjustments are generally based on available market evidence. In the absence of such evidence, management’s best estimate is used.

(b) Fair Value of Financial Instruments

The carrying value of cash and cash equivalents, accounts receivable and other, accounts payable and accrued liabilities, accounts payable to affiliates and accrued interest approximate their fair values because of the short maturity or duration of these instruments, or because the instruments bear a variable rate of interest or a rate that approximates current rates. The fair value of the Partnership’s long-term debt is estimated by discounting the future cash flows of each instrument at estimated current borrowing rates. The fair value of interest rate derivatives is calculated using the income approach which uses period-end market rates and applies a discounted cash flow valuation model.

14

Table of Contents

The estimated fair value of the Partnership’s long-term debt as at March 31, 2014 and December 31, 2013 are as follows:

Long-term debt is recorded at amortized cost and classified in Level II of the fair value hierarchy for fair value disclosure purposes. Interest rate derivative assets and liabilities are classified in Level II for all periods presented where the fair value is determined by using valuation techniques that refer to observable market data or estimated market prices.

Market risk is the risk that changes in market interest rates may result in fluctuations in the fair values or cash flows of financial instruments. The Partnership’s floating rate debt is subject to LIBOR benchmark interest rate risk. The Partnership uses interest rate derivatives to manage its exposure to interest rate risk. We regularly assess the impact of interest rate fluctuations on future cash flows and evaluate hedging opportunities to mitigate our interest rate risk.

The interest rate swaps are structured such that the cash flows of the derivative instruments match those of the variable rate of interest on the Term Loan Facility. The Partnership hedged interest payments on $150 million of variable-rate Term Loan Facility with interest rate swaps effective September 3, 2013 and maturing July 1, 2018, at a weighted average fixed interest rate of 2.79 percent. At March 31, 2014 and December 31, 2013, the fair value of the interest rate swaps accounted for as cash flow hedges was less than $1 million (both on a gross and net basis). The Partnership did not record any amounts in net income related to ineffectiveness for interest rate hedges for the three months ended March 31, 2014 (2013 – nil). The change in fair value of interest rate derivative instruments recognized in other comprehensive income was less than $1 million for the three months ended March 31, 2014 (2013 – nil). For the three months ended March 31, 2014, the net realized loss related to the interest rate swaps was $1 million and was included in financial charges and other (2013 – nil).

The Partnership has no master netting agreements; however, contracts contain provisions with rights of offset. The Partnership has elected to present the fair value of derivative instruments with the right to offset on a gross basis in the balance sheet. Had the Partnership elected to present these instruments on a net basis, there would be no effect on the consolidated balance sheet as of March 31, 2014 and December 31, 2013.

NOTE 10      ACCOUNTS RECEIVABLE AND OTHER

NOTE 11      SUBSEQUENT EVENTS

On April 25, 2014, the board of directors of our General Partner declared the Partnership’s first quarter 2014 cash distribution in the amount of $0.81 per common unit payable on May 15, 2014 to unitholders of record as of May 5, 2014.

GTN declared its first quarter 2014 distribution of $36 million on April 7, 2014, of which the Partnership will receive its 70 percent share or $25 million on May 1, 2014.

15

Table of Contents

Northern Border declared its first quarter 2014 distribution of $52 million on April 16, 2014, of which the Partnership will receive its 50 percent share or $26 million on May 1, 2014.

Bison declared its first quarter 2014 distribution of $16 million on April 7, 2014, of which the Partnership will receive its 70 percent share or $11 million on May 1, 2014.

Great Lakes declared its first quarter 2014 distribution of $29 million on April 7, 2014, of which the Partnership will receive its 46.45 percent share or $13 million on May 1, 2014.

On April 11, 2014, the Partnership made a $25 million payment to a subsidiary of TransCanada in accordance with the 2013 Acquisition with respect to the Carty Lateral. It was financed by cash on hand and a draw on the Senior Credit Facility (refer to note 8).

16

Table of Contents

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

The following discussion and analysis should be read in conjunction with the unaudited financial statements and notes included in Item 1. “Financial Statements” of this Quarterly Report on Form 10-Q, as well as our Annual Report on Form 10-K for the year ended December 31, 2013.

RECENT BUSINESS DEVELOPMENTS

Cash Distributions – On April 25, 2014, the board of directors of our General Partner declared the Partnership’s first quarter 2014 cash distribution in the amount of $0.81 per common unit, payable on May 15, 2014 to unitholders of record as of May 5, 2014.

Outlook of Our Business

In 2014, the Partnership’s portfolio of six FERC-regulated interstate natural gas pipelines, five of which are backed by long-term, ship-or-pay contracts, is expected to deliver higher Partnership Cash flows as compared to 2013 primarily due to the increased membership interests in GTN and Bison. Great Lakes is expected to continue to contract largely on a short-term, short-haul basis; however, the higher recourse rates resulting from its recent settlement with shippers provide it with a greater opportunity to generate additional revenues as market conditions allow. Due to the effects of extended cold weather in the winter of 2013/14, management expects transportation revenues from our current pipeline systems to be modestly higher in 2014 when compared to 2013.

HOW WE EVALUATE OUR OPERATIONS

We evaluate our business primarily on the basis of the underlying operating results for each of our pipeline systems along with a measure of Partnership cash flows. This measure does not have a standardized meaning prescribed by GAAP. It is, therefore, considered to be a non-GAAP measure and is unlikely to be comparable to similar measures presented by other entities. Refer to Partnership Cash Flows for additional information.

RESULTS OF OPERATIONS

Critical Accounting Policies and Estimates

The preparation of financial statements in accordance with GAAP requires us to make estimates and assumptions with respect to values or conditions, which cannot be known with certainty, that affect the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements. Such estimates and assumptions also affect the reported amounts of revenue and expenses during the reporting period. Although we believe these estimates and assumptions are reasonable, actual results could differ. There were no significant changes to the Partnership’s critical accounting policies and estimates during the three months ended March 31, 2014.

Information about our critical accounting policies and estimates is included under Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2013.

Net Income Attributable to Controlling Interests

To supplement our financial statements, we have presented a comparison of the earnings contribution components from each of our investments. We have presented net income attributable to controlling interests in this format to enhance investors’ understanding of the way management analyzes our financial performance. The presentation of this additional information is not meant to be considered in isolation or as a substitute for results prepared in accordance with GAAP.

17

Table of Contents

(a) Financial information was recast to consolidate GTN and Bison for the period presented.

First Quarter 2014 Compared with First Quarter 2013

For the three months ended March 31, 2014, net income attributable to controlling interests increased by $14 million to $57 million compared to $43 million in the first quarter of 2013. This increase was primarily due to higher equity earnings from Northern Border and Great Lakes partially offset by higher Partnership expenses.

Equity earnings from Northern Border were $23 million in the first quarter of 2014, an increase of $7 million compared to the same quarter in 2013. The increase was primarily due to Northern Border selling short-term services to its customers during the coldest periods this quarter.

Equity earnings from Great Lakes were $10 million in the first quarter of 2014, an increase of $8 million compared to the same period in 2013. The increase was primarily due to Great Lakes’ sales of daily capacity during the winter peaks, plus sales of some one year capacity. Additionally, Great Lakes had lower operation and maintenance expenses and property taxes in the first quarter of 2014 compared to the same period in 2013.

Partnership expenses were $10 million in the first quarter of 2014, an increase of $3 million compared to the same period in 2013. The increase was primarily due to interest expense incurred in relation to the $500 million term loan obtained to finance a portion of the 2013 Acquisition.

LIQUIDITY AND CAPITAL RESOURCES

Overview

Our principal sources of liquidity include distributions received from our investments in partially owned affiliates, operating cash flows from our subsidiaries, public offerings of debt and equity, term loans and our bank credit facility. The Partnership funds its operating expenses, debt service and cash distributions primarily with operating cash flow. Long-term capital needs may be met through the issuance of long-term debt and/or equity.

Our pipeline systems’ principal sources of liquidity are cash generated from operating activities, long-term debt offerings, bank credit facilities and equity contributions from their owners. Our pipeline systems have historically funded operating expenses, debt service and cash distributions to their owners primarily with operating cash flow. However, since the fourth quarter of 2010, Great Lakes has funded its debt repayments with cash calls to its owners. Northern Border also funded $62 million of debt repayment in 2013 with a cash call to its owners.

Capital expenditures are funded by a variety of sources, including cash generated from operating activities, borrowings under bank credit facilities, issuance of senior unsecured notes or equity contributions from our pipeline systems’ owners. The ability of our pipeline systems to access the debt capital markets under reasonable terms depends on their financial position and general market conditions.

18

Table of Contents

The Partnership’s pipeline systems monitor the creditworthiness of their customers and have credit provisions included in their tariffs which, although limited by FERC, allow them to request credit support as circumstances dictate.

Our cash flow is based on the distributions from our portfolio of six pipelines. Overall, we believe that our pipeline systems’ ability to obtain financing at reasonable rates, together with a history of consistent cash flow from operating activities, provide a solid foundation to meet future liquidity and capital requirements. We expect to be able to fund our liquidity requirements, including our distributions, at the Partnership level over the next 12 months utilizing our cash flow and our existing Senior Credit Facility if required.

Partnership Cash Flows

The Partnership uses the non-GAAP financial measures “Partnership cash flows” and “Partnership cash flows before General Partner distributions” as they provide a measure of cash generated during the period to evaluate our cash distribution capability. As well, management uses these measures as a basis for recommendations to our General Partner’s board of directors regarding the distribution amount to be declared each quarter. Partnership cash flow information is presented to enhance investors’ understanding of the way that management analyzes the Partnership’s financial performance.

Partnership cash flows include net income attributable to controlling interests, less net income attributed to GTN’s and Bison’s former parent, plus operating cash flows from North Baja and Tuscarora, and cash distributions received from GTN, Northern Border, Bison and Great Lakes, less equity earnings from unconsolidated affiliates and Other Pipes’ net income as previously reported, plus net income attributable to non-controlling interests from consolidated subsidiaries after the 2013 Acquisition, and net of distributions declared to the General Partner. Partnership cash flows before General Partner distributions represent Partnership cash flows prior to distributions paid to the General Partner.

Partnership cash flows and Partnership cash flows before General Partner distributions are provided as a supplement to GAAP financial results and are not meant to be considered in isolation or as substitutes for financial results prepared in accordance with GAAP.

19

Table of Contents

Non-GAAP Measures

Reconciliations of Net Income Attributable to Controlling Interests to Partnership Cash Flows