10-Q

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 September 30, 2011

or

¨ 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 1-33556

SPECTRA ENERGY PARTNERS, LP

(Exact Name of Registrant as Specified in its Charter)

Delaware	41-2232463
(State or other jurisdiction of incorporation)	(IRS Employer Identification No.)

5400 Westheimer Court

Houston, Texas 77056

(Address of principal executive offices, including zip code)

713-627-5400

(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  ¨

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  ¨

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

Large accelerated filer  x    Accelerated  filer  ¨    Non-accelerated filer  ¨    Smaller reporting company  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

At September 30, 2011, there were 96,347,567 Common Units and 1,966,081 General Partner Units outstanding.

SPECTRA ENERGY PARTNERS, LP

FORM 10-Q FOR THE QUARTER ENDED

September 30, 2011

INDEX

		Page
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)		4
	Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2011 and 2010		4
	Condensed Consolidated Balance Sheets as of September 30, 2011 and December 31, 2010		5
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2011 and 2010		7
	Condensed Consolidated Statements of Partners’ Capital for the nine months ended September 30, 2011 and 2010		8
	Notes to Condensed Consolidated Financial Statements		9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		19
Item 3.	Quantitative and Qualitative Disclosures about Market Risk		29
Item 4.	Controls and Procedures		30
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings		31
Item 1A.	Risk Factors		31
Item 6.	Exhibits		31
	Signatures		33

2

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

This document includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements are based on management’s beliefs and assumptions. These forward-looking statements are identified by terms and phrases such as: anticipate, believe, intend, estimate, expect, continue, should, could, may, plan, project, predict, will, potential, forecast, and similar expressions. Forward-looking statements involve risks and uncertainties that may cause actual results to be materially different from the results predicted. Factors that could cause actual results to differ materially from those indicated in any forward-looking statement include, but are not limited to:

• state and federal legislative and regulatory initiatives that affect cost and investment recovery, have an effect on rate structure, and affect the speed at and degree to which competition enters the natural gas industries;

• outcomes of litigation and regulatory investigations, proceedings or inquiries;

• weather and other natural phenomena, including the economic, operational and other effects of hurricanes and storms;

• the timing and extent of changes in interest rates;

• general economic conditions, including the risk of a prolonged economic slowdown or decline, or the risk of delay in a recovery, which can affect the long-term demand for natural gas and related services;

• potential effects arising from terrorist attacks and any consequential or other hostilities;

• changes in environmental, safety and other laws and regulations;

• the development of alternative energy resources;

• results of financing efforts, including the ability to obtain financing on favorable terms, which can be affected by various factors, including credit ratings and general market and economic conditions;

• increases in the cost of goods and services required to complete capital projects;

• growth in opportunities, including the timing and success of efforts to develop domestic pipeline, storage, gathering and other related infrastructure projects and the effects of competition;

• the performance of natural gas transmission, storage and gathering facilities;

• the extent of success in connecting natural gas supplies to transmission and gathering systems and in connecting to expanding gas markets;

• the effect of accounting pronouncements issued periodically by accounting standard-setting bodies;

• conditions of the capital markets during the periods covered by these forward-looking statements; and

• the ability to successfully complete merger, acquisition or divestiture plans; regulatory or other limitations imposed as a result of a merger, acquisition or divestiture; and the success of the business following a merger, acquisition or divestiture.

In light of these risks, uncertainties and assumptions, the events described in the forward-looking statements might not occur or might occur to a different extent or at a different time than Spectra Energy Partners, LP has described. Spectra Energy Partners, LP undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

3

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

SPECTRA ENERGY PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(In millions, except per-unit amounts)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Operating Revenues
Transportation of natural gas	$	47.9	$	42.1	$	129.9	$	125.5
Storage of natural gas and other		5.0		6.9		17.2		21.4
Total operating revenues		52.9		49.0		147.1		146.9
Operating Expenses
Operating, maintenance and other		17.2		16.5		50.3		49.5
Depreciation and amortization		9.7		7.4		24.9		22.2
Property and other taxes		2.8		0.8		8.3		6.0
Total operating expenses		29.7		24.7		83.5		77.7
Operating Income		23.2		24.3		63.6		69.2
Other Income and Expenses
Equity in earnings of unconsolidated affiliates		27.3		18.4		81.9		54.0
Other income and expenses, net		0.9		0.2		2.2		0.4
Total other income and expenses		28.2		18.6		84.1		54.4
Interest Income		—		—		0.3		0.1
Interest Expense		7.7		4.3		17.2		12.2
Earnings Before Income Taxes		43.7		38.6		130.8		111.5
Income Tax Expense		0.2		0.2		0.8		0.8
Net Income	$	43.5	$	38.4	$	130.0	$	110.7
Calculation of Limited Partners’ Interest in Net Income:
Net income	$	43.5	$	38.4	$	130.0	$	110.7
Less:
General partner’s interest in net income		5.4		2.7		14.5		7.4
Limited partners’ interest in net income	$	38.1	$	35.7	$	115.5	$	103.3
Weighted-average limited partner units outstanding—basic and diluted		96.3		80.3		92.0		80.3
Net income per limited partner unit—basic and diluted	$	0.40	$	0.44	$	1.26	$	1.29
Distributions paid per limited partner unit during the periods presented	$	0.465	$	0.43	$	1.375	$	1.26

See Notes to Condensed Consolidated Financial Statements.

4

SPECTRA ENERGY PARTNERS, LP

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In millions)

	September 30, 2011		December 31, 2010
ASSETS
Current Assets
Cash and cash equivalents	$	3.8	$	27.4
Receivables, net		32.8		24.8
Other		9.5		6.8
Total current assets		46.1		59.0
Investments and Other Assets
Investments in unconsolidated affiliates		730.1		728.6
Goodwill and other		460.9		477.0
Total investments and other assets		1,191.0		1,205.6
Property, Plant and Equipment
Cost		1,429.9		1,148.3
Less accumulated depreciation and amortization		225.8		206.8
Net property, plant and equipment		1,204.1		941.5
Regulatory Assets and Deferred Debits		19.3		16.4
Total Assets	$	2,460.5	$	2,222.5

See Notes to Condensed Consolidated Financial Statements.

5

SPECTRA ENERGY PARTNERS, LP

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In millions)

	September 30, 2011		December 31, 2010
LIABILITIES AND PARTNERS’ CAPITAL
Current Liabilities
Accounts payable	$	25.3	$	13.8
Taxes accrued		7.0		3.9
Note payable—affiliates		28.5		34.0
Current maturities of long-term debt		10.0		—
Other		20.1		7.9
Total current liabilities		90.9		59.6
Long-term Debt		649.4		655.8
Deferred Credits and Other Liabilities
Deferred income taxes		7.6		9.0
Other		5.8		3.7
Total deferred credits and other liabilities		13.4		12.7
Commitments and Contingencies
Partners’ Capital
Common units (96.3 million and 89.2 million units issued and outstanding at September 30, 2011 and December 31, 2010, respectively)		1,662.8		1,458.7
General partner units (2.0 million and 1.8 million units issued and outstanding at September 30, 2011 and December 31, 2010, respectively)		39.3		32.9
Accumulated other comprehensive income		4.7		2.8
Total partners’ capital		1,706.8		1,494.4
Total Liabilities and Partners’ Capital	$	2,460.5	$	2,222.5

See Notes to Condensed Consolidated Financial Statements.

6

SPECTRA ENERGY PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(In millions)

	Nine Months Ended September 30,
	2011			2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	130.0		$	110.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		24.9			22.2
Deferred income tax expense		0.7			0.4
Equity in earnings of unconsolidated affiliates		(81.9	)		(54.0	)
Distributions received from unconsolidated affiliates		90.1			59.8
Other		6.7			5.4
Net cash provided by operating activities		170.5			144.5
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(78.0	)		(19.7	)
Investment expenditures		(15.5	)		(18.8	)
Acquisition of Big Sandy		(389.6	)		—
Distributions received from unconsolidated affiliates		5.4			6.1
Purchases of available-for-sale securities		(891.6	)		—
Proceeds from sales and maturities of available-for-sale securities		1,091.1			—
Other		10.6			—
Net cash used in investing activities		(267.6	)		(32.4	)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of long-term debt		499.4			—
Payments for the redemption of long-term debt		(207.2	)		—
Net decrease in revolving credit facility borrowings		(288.6	)		(10.0	)
Proceeds from issuance of units		217.9			—
Proceeds from notes payable—affiliates		14.0			16.0
Payments on notes payable—affiliates		(19.5	)		(10.5	)
Distributions to partners		(138.5	)		(107.8	)
Other		(4.0	)		(1.6	)
Net cash provided by (used in) financing activities		73.5			(113.9	)
Net decrease in cash and cash equivalents		(23.6	)		(1.8	)
Cash and cash equivalents at beginning of period		27.4			12.2
Cash and cash equivalents at end of period	$	3.8		$	10.4
Supplemental Disclosures
Property, plant and equipment noncash accruals	$	10.7		$	0.7
Deemed contributions from General Partner for services provided		—			1.4

See Notes to Condensed Consolidated Financial Statements.

7

SPECTRA ENERGY PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS’ CAPITAL

(Unaudited)

(In millions)

	Partners’ Capital									Accumulated Other Comprehensive Income (Loss)			Total
	Limited Partners						General Partner
	Common			Subordinated
December 31, 2010	$	1,458.7		$	—		$	32.9		$	2.8		$	1,494.4
Net income		115.5			—			14.5			—			130.0
Unrealized mark-to-market net loss on hedges		—			—			—			(0.1	)		(0.1	)
Reclassification of cash flow hedges into earnings		—			—			—			2.0			2.0
Issuance of units		213.4			—			4.5			—			217.9
Attributed deferred tax benefit		0.8			—			—			—			0.8
Distributions to partners		(125.9	)		—			(12.6	)		—			(138.5	)
Other		0.3			—			—			—			0.3
September 30, 2011	$	1,662.8		$	—		$	39.3		$	4.7		$	1,706.8
December 31, 2009	$	1,015.0		$	308.5		$	27.2		$	(2.2	)	$	1,348.5
Net income		85.0			18.3			7.4			—			110.7
Unrealized mark-to-market net loss on hedges		—			—			—			(2.0	)		(2.0	)
Reclassification of cash flow hedges into earnings		—			—			—			3.5			3.5
Attributed deferred tax benefit		0.4			0.1			—			—			0.5
Distributions to partners		(74.0	)		(27.2	)		(6.6	)		—			(107.8	)
Contributions from general partner		—			—			1.4			—			1.4
Conversion of subordinated units to common units		299.7			(299.7	)		—			—			—
Other		0.2			—			—			—			0.2
September 30, 2010	$	1,326.3		$	—		$	29.4		$	(0.7	)	$	1,355.0

See Notes to Condensed Consolidated Financial Statements.

8

SPECTRA ENERGY PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. General

The terms “we,” “our,” “us” and “Spectra Energy Partners” as used in this report refer collectively to Spectra Energy Partners, LP and its subsidiaries unless the context suggests otherwise. These terms are used for convenience only and are not intended as a precise description of any separate legal entity within Spectra Energy Partners.

Nature of Operations. Spectra Energy Partners, LP, through its subsidiaries and equity affiliates is engaged in the transportation and gathering of natural gas through interstate pipeline systems that are located in the southeastern quadrant of the United States, and the storage of natural gas in underground facilities that are located in southeast Texas, south central Louisiana and southwest Virginia.

Acquisitions. On July 1, 2011, we completed the acquisition of Big Sandy Pipeline, LLC (Big Sandy) from EQT Corporation (EQT) for approximately $390 million in cash. The Big Sandy natural gas pipeline system connects Appalachian and Huron Shale natural gas supplies to markets in the mid-Atlantic and northeast portions of the United States. See Note 2 for further information on this acquisition.

Basis of Presentation. The Condensed Consolidated Financial Statements include our accounts and the accounts of our majority-owned subsidiaries where we have control. These interim financial statements should be read in conjunction with the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2010, and reflect all normal recurring adjustments that are, in our opinion, necessary to fairly present our results of operations and financial position. Amounts reported in the Condensed Consolidated Statements of Operations are not necessarily indicative of amounts expected for the respective annual periods.

During the third quarter of 2011, we identified errors in our previously issued Condensed Consolidated Statements of Cash Flows related to the accounting for rollovers of outstanding borrowings under our revolving bank credit facility. These non-cash rollovers were previously accounted for as cash activities and resulted in the overstatement of both Proceeds from Issuance of Long-Term Debt and Payments for the Redemption of Long-Term Debt for the nine months ended September 30, 2010. Cash and Cash Equivalents and Net Cash Provided By (Used In) Financing Activities as previously reported are not affected by the errors. We evaluated materiality from both a qualitative and a quantitative perspective and concluded that the errors are immaterial to our previously issued Condensed Consolidated Statements of Cash Flows.

In addition to making this correction, effective with the third quarter of 2011, we have elected to present cash borrowings and repayments under our revolving bank credit facility on a net basis for all periods presented as Net Decrease in Revolving Credit Facility Borrowings. As these periodic borrowings and repayments are generally of significant amounts and had terms of 90 days or less, we believe our current presentation provides users with more meaningful and relevant information about our long-term debt financing activities.

The correction and change in presentation reflected on the Condensed Consolidated Statement of Cash Flows are as follows:

Nine Months Ended September 30, 2010	Proceeds From the Issuance of Long- Term Debt			Payments for the Redemption of Long-Term Debt
	(in millions)
As previously reported	$	2,146.0		$	2,156.0
Less non-cash activity		(2,120.0	)		(2,120.0	)
As corrected		26.0			36.0
Less revolving credit facility activity		(26.0	)		(36.0	)
Long-term debt activity	$	—		$	—

9

Use of Estimates. To conform with generally accepted accounting principles (GAAP) in the United States, we make estimates and assumptions that affect the amounts reported in the Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements. Although these estimates are based on our best available knowledge at the time, actual results could differ.

2. Acquisitions

Big Sandy. On July 1, 2011, we completed the acquisition of Big Sandy from EQT for approximately $390 million in cash. Big Sandy’s primary asset is a 68-mile Federal Energy Regulatory Commission (FERC)-regulated natural gas pipeline system in eastern Kentucky with capacity of 171,000 dekatherms per day. The Big Sandy natural gas pipeline system connects Appalachian and Huron Shale natural gas supplies to markets in the mid-Atlantic and northeast portions of the United States. EQT will be the main shipper on the pipeline, with over 80% of the pipeline’s capacity. With 100% fee-based revenues and a weighted average contract life of 15 years, the acquisition of Big Sandy strengthens our portfolio of fee-based natural gas assets and is consistent with our strategy of growth through third-party acquisitions.

The assets and liabilities of Big Sandy were recorded at their respective fair values as of the purchase date and the results of operations were included in the Condensed Consolidated Financial Statements beginning as of the effective date of the acquisition. Since Big Sandy records assets and liabilities resulting from the rate making process, the fair values of the individual assets and liabilities are considered to approximate their carrying values. Big Sandy is part of the Gas Transportation and Storage segment.

The following table summarizes the preliminary fair values of the assets and liabilities acquired as of July 1, 2011. Subsequent adjustments may be recorded upon the completion of the valuation and the final determination of the purchase price allocation.

	Purchase Price Allocation
	(in millions)
Cash purchase price	$	390.0
Working capital adjustments		(0.4	)
Total purchase price		389.6
Property, plant and equipment		196.2
Current liabilities		(0.4	)
Total assets acquired/liabilities assumed	$	195.8
Goodwill	$	193.8

The purchase price is greater than the sum of fair values of the net assets acquired, resulting in goodwill as noted above. The goodwill reflects the value of strong cash flows from stable long-term contracts. Pro forma results of operations reflecting the acquisition of Big Sandy as if the acquisition had occurred as of the beginning of the periods presented in this report do not materially differ from actual reported results.

Gulfstream Natural Gas System, L.L.C. (Gulfstream). On November 30, 2010, we acquired an additional 24.5% interest in Gulfstream from a subsidiary of Spectra Energy Corp (Spectra Energy) for approximately $330.0 million, consisting of approximately $66.0 million in newly issued units, the assumption of $7.4 million in debt owed to Spectra Energy Capital LLC, a subsidiary of Spectra Energy and $256.6 million in cash, which was funded through borrowings under our credit facility. The acquisition increased our interest in Gulfstream to 49%.

The Gulfstream acquisition represented a transaction between entities under common control, but did not represent a change in reporting entity as Gulfstream is accounted for as an equity method investment.

10

Accordingly, the Condensed Consolidated Financial Statements and related information presented herein include the results of the acquisition of additional interest in Gulfstream as of the date of the acquisition.

The additional 24.5% interest in Gulfstream was recorded at the historical book value of Spectra Energy of $179.9 million, including $2.5 million of additional equity interest in Gulfstream’s other comprehensive income. The $150.1 million excess purchase price over the book value of net assets acquired was recorded as a reduction to Partners’ Capital, and the $66.0 million of common and general partner units issued were recorded as increases to Partners’ Capital.

Following the acquisition of Gulfstream, we issued 6.9 million of our common units to the public, representing limited partner interests. The net proceeds from this offering were approximately $221.0 million, including our general partner’s proportionate unit purchase after deducting the underwriting fees. The proceeds were used to repay the $7.4 million loan assumed in the Gulfstream acquisition. The remaining $209.0 million in net proceeds (other than proceeds from our general partner) were used to purchase qualifying investment grade securities, which were assigned as collateral to secure the new term loan of an approximately equal principal amount. The proceeds of the term loan were used to repay revolving borrowings, which were incurred to fund a portion of the consideration of the Gulfstream acquisition. The approximately $4.6 million in proceeds from our general partner’s proportionate unit purchase were used for general partnership purposes.

3. Business Segments

Our Gas Transportation and Storage segment aligns our operations with the chief operating decision maker’s view of the business. This business segment is considered to be our sole reportable segment.

The Gas Transportation and Storage segment provides interstate transportation, storage and gathering services of natural gas, and the storage and redelivery of liquefied natural gas for customers in the southeastern quadrant of the United States. Substantially all of our operations are subject to the FERC and the Department of Transportation’s (DOT) rules and regulations. This segment includes East Tennessee Natural Gas, LLC (East Tennessee), Ozark Gas Transmission, L.L.C. (Ozark Gas Transmission) and Ozark Gas Gathering, L.L.C. (Ozark Gas Gathering) (collectively, hereafter referred to as “Ozark”), Saltville Gas Storage, L.L.C. (Saltville), and Big Sandy.

The remainder of our operations is presented as “Other.” While it is not considered a business segment, Other mainly includes our equity investments in Gulfstream and Market Hub Partners Holding (Market Hub) and unallocated corporate costs.

Gulfstream provides interstate natural gas pipeline transportation from Pascagoula, Mississippi and Mobile, Alabama across the Gulf of Mexico into Florida for customers in central and southern Florida. Gulfstream’s operations are subject to the rules and regulations of the FERC and DOT.

Market Hub owns and operates two natural gas storage facilities, Moss Bluff and Egan, which are located in southeast Texas and south central Louisiana, respectively. Market Hub’s operations are subject to the rules and regulations of DOT. Moss Bluff is also subject to the rules and regulations of the Texas Railroad Commission, while Egan is also subject to the rules and regulations of the FERC.

Management evaluates segment performance based on earnings before interest and taxes (EBIT) from continuing operations. On a segment basis, EBIT represents all profits from continuing operations (both operating and non-operating) before deducting interest and income taxes.

11

Business Segment Data

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Operating revenues
Gas Transportation and Storage	$	52.9	$	49.0	$	147.1	$	146.9
Other		—		—		—		—
Total operating revenues	$	52.9	$	49.0	$	147.1	$	146.9
Segment EBIT
Gas Transportation and Storage	$	25.9	$	26.0	$	73.1	$	76.2
Other		25.5		16.9		74.6		47.4
Total EBIT		51.4		42.9		147.7		123.6
Interest income		—		—		0.3		0.1
Interest expense		7.7		4.3		17.2		12.2
Earnings before income taxes	$	43.7	$	38.6	$	130.8	$	111.5

4. Regulatory Matters

Ozark Gas Transmission. As a result of a FERC rate proceeding, Ozark Gas Transmission filed a Cost and Revenue Study in early 2011. A settlement agreement reached with parties involved in the proceeding was approved by the FERC with an effective date of October 1, 2011. The effects of this matter will not have a material impact on our future consolidated results of operations, financial position or cash flows.

5. Income Taxes

As a result of our master limited partnership structure, we are not subject to federal income tax, but certain portions of our operations are subject to Tennessee state income tax. We recognized a $3 million increase in uncertain tax positions during the nine months ended September 30, 2011. Although uncertain, no material increases or decreases in uncertain tax benefits are expected to occur prior to September 30, 2012. Market Hub is liable for Texas income (margin) tax under a tax sharing agreement with Spectra Energy.

6. Comprehensive Income

Components of comprehensive income are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	(in millions)
Net income	$	43.5		$	38.4		$	130.0		$	110.7
Unrealized mark-to-market net loss on hedges		(0.1	)		(0.5	)		(0.1	)		(2.0	)
Reclassification of cash flow hedges into earnings		0.3			1.1			2.0			3.5
Total comprehensive income	$	43.7		$	39.0		$	131.9		$	112.2

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7. Net Income Per Limited Partner Unit and Cash Distributions

The following table presents our net income per limited partner unit calculations.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions, except per unit amounts)
Net income	$	43.5	$	38.4	$	130.0	$	110.7
Less:
General partner’s interest in net income—2%		0.9		0.7		2.6		2.2
General partner’s interest in net income attributable to incentive distribution rights		4.5		2.0		11.9		5.2
Limited partners’ interest in net income	$	38.1	$	35.7	$	115.5	$	103.3
Weighted average limited partner units outstanding—basic and diluted		96.3		80.3		92.0		80.3
Net income per limited partner unit—basic and diluted	$	0.40	$	0.44	$	1.26	$	1.29

The partnership agreement requires that, within 45 days after the end of each quarter, we distribute all of our Available Cash, as defined, to unitholders of record on the applicable record date.

Available Cash. Available Cash, for any quarter, consists of all cash on hand at the end of that quarter:

• less the amount of cash reserves established by the general partner to:

• provide for the proper conduct of business,

• comply with applicable law, any debt instrument or other agreement, or

• provide funds for distributions to the unitholders and to the general partner for any one or more of the next four quarters,

• plus, if the general partner so determines, all or a portion of cash on hand on the date of determination of Available Cash for the quarter.

Incentive Distribution Rights. The general partner holds incentive distribution rights in accordance with the partnership agreement as follows:

	Total Quarterly Distribution	Marginal Percentage Interest in Distributions
	Target Per-Unit Amount	Common and Subordinated Unitholders			General Partner
Minimum Quarterly Distribution	$0.30		98	%		2	%
First Target Distribution	up to $0.345		98	%		2	%
Second Target Distribution	above $0.345 up to $0.375		85	%		15	%
Third Target Distribution	above $0.375 up to $0.45		75	%		25	%
Thereafter	above $0.45		50	%		50	%

To the extent these incentive distributions are made to our general partner, there will be more Available Cash proportionately allocated to our general partner than to holders of common units. Our distribution paid in August 2011 was $0.465 per unit.

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8. Investments in Unconsolidated Affiliates

During the fourth quarter of 2010, we purchased an additional 24.5% interest in Gulfstream from a subsidiary of Spectra Energy, for a total interest of 49%. See Note 2 for further discussion. The equity earnings related to the additional 24.5% interest are included in our results from the date of the acquisition.

As of September 30, 2011, our investments in unconsolidated affiliates consist of a 49% interest in Gulfstream and a 50% interest in Market Hub, both of which are accounted for using the equity method.

For the nine months ended September 30, 2011, we received total distributions of $56.0 million from Gulfstream, of which $50.6 million were included in Cash Flows From Operating Activities—Distributions Received From Unconsolidated Affiliates and $5.4 million were included in Cash Flows From Investing Activities—Distributions Received From Unconsolidated Affiliates. For the nine months ended September 30, 2010, we received total distributions of $29.4 million, of which $23.3 million were included in Cash Flows From Operating Activities—Distributions Received From Unconsolidated Affiliates and $6.1 million were included in Cash Flows From Investing Activities—Distributions Received From Unconsolidated Affiliates.

We received distributions from Market Hub of $39.5 million during the nine months ended September 30, 2011 and $36.5 million during the same period in 2010, all of which were included in Cash Flows From Operating Activities—Distributions Received From Unconsolidated Affiliates.

Investments in Unconsolidated Affiliates

	September 30, 2011		December 31, 2010
	(in millions)
Gulfstream	$	363.9	$	368.1
Market Hub		366.2		360.5
Total	$	730.1	$	728.6

Equity in Earnings of Unconsolidated Affiliates

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Gulfstream	$	16.2	$	8.2	$	48.4	$	23.7
Market Hub		11.1		10.2		33.5		30.3
Total	$	27.3	$	18.4	$	81.9	$	54.0

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Summarized Financial Information of Unconsolidated Affiliates

(Presented at 100%)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Gulfstream
Operating revenues	$	69.7	$	69.5	$	205.0	$	203.5
Operating expenses		18.7		18.4		53.8		54.8
Operating income		51.0		51.1		151.2		148.7
Net income		33.0		33.8		98.8		96.9
Market Hub
Operating revenues	$	31.0	$	29.2	$	92.1	$	88.1
Operating expenses		8.6		9.0		24.9		28.1
Operating income		22.4		20.2		67.2		60.0
Net income		22.3		20.3		67.1		60.6

9. Goodwill

We completed our annual goodwill impairment test as of April 1, 2011 and no impairments were identified. All of our goodwill is in our Gas Transportation and Storage segment.

We primarily use a discounted cash flow analysis to determine fair value for our reporting unit. Key assumptions in the determination of fair value include the use of an appropriate discount rate and estimated future cash flows. In estimating cash flows, we incorporate expected long-term growth rates in key markets served by our operations, regulatory stability, and the ability to renew contracts, as well as other factors that affect our revenue, expense and capital expenditure projections.

Changes in the balance of goodwill since December 31, 2010 follow (in millions):

Balance at December 31, 2010	$	267.9
Increase due to the acquisition of Big Sandy (a)		193.8
Balance at September 30, 2011	$	461.7

(a) See Note 2 for further discussion.

10. Marketable Securities

In the fourth quarter of 2010, we invested a portion of the proceeds from the equity issuance following the Gulfstream acquisition in commercial paper. These investments which totaled $209.0 million as of December 31, 2010, were pledged as collateral against the term loan and are classified as Other Investments on the Condensed Consolidated Balance Sheet. See Note 2 for additional information on the acquisition of additional interest in Gulfstream. The estimated fair value of long-term investments classified as available-for-sale was $209.0 million at December 31, 2010. There were no gross unrealized holding gains or losses as of December 31, 2010.

In June 2011, the term loan was repaid using proceeds from the issuance of unsecured senior notes, and the related investments were liquidated. See Note 11 for additional information on the repayment of the term loan.

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11. Debt and Credit Facility

	Expiration Date		Credit Facility Capacity		Outstanding as of September 30, 2011
Credit Facility Summary					Revolving Credit
			(in millions)
Spectra Energy Partners, LP		2012	$	500.0	$	10.0

The credit facility prohibits us from making distributions of Available Cash to unitholders if any default or event of default, as defined in the credit agreement, exists. In addition, the credit facility contains covenants, among others, limiting our ability to make other restricted distributions or dividends on account of the purchase, redemption, retirement, acquisition, cancellation or termination of partnership interests, and is also subject to certain financial covenants.

These financial covenants include a financial leverage ratio. The terms of the credit agreement require us to maintain a ratio of total debt to Adjusted Earnings Before Interest, Taxes, Depreciation and Amortization (EBITDA), as defined in the credit agreement, of 5.0 or less. As of September 30, 2011, the ratio was 2.6. As of September 30, 2011, we were in compliance with the covenants of the credit facility. The credit facility does not contain provisions that trigger an acceleration of indebtedness based solely on the occurrence of a material adverse change in our financial condition or results of operations. Adjusted EBITDA is a non-GAAP measure. Because Adjusted EBITDA excludes some, but not all, items that affect net income and is defined differently by companies in our industry, our definition of Adjusted EBITDA may not be comparable to similarly titled measures of other companies. Adjusted EBITDA should not be considered an alternative to net income, operating income, cash from operations or any other measure of financial performance or liquidity presented in accordance with GAAP.

On October 18, 2011, we entered into a $700 million revolving credit agreement (Credit Agreement) which will mature on October 18, 2016 and may be extended for up to two additional one-year periods at our request. The Credit Agreement contains a sublimit of $250 million for issuances of letters of credit, $150 million of which may be denominated in alternative currencies. The Credit Agreement also provides for up to $350 million in additional revolving commitments, which may consist of incremental term loans that, at our election, automatically increase the aggregate amount of the revolving commitments upon any prepayment thereof.

Unsecured Senior Notes. On June 9, 2011, we issued $500.0 million aggregate principal amount of unsecured senior notes, including $250.0 million 2.95% senior notes due in 2016 and $250.0 million 4.60% senior notes due in 2021. Interest on the notes will be payable semi-annually in arrears on June 15 and December 15 of each year, commencing on December 15, 2011. Net proceeds from this offering were used to repay all of the outstanding borrowings under our term loan, a significant portion of the funds borrowed under the credit facility, with the remaining balance used for general partnership purposes.

These notes are governed by an indenture, dated as of June 9, 2011, between us and Wells Fargo Bank, National Association, the trustee, as supplemented. The aggregate principal amount of debt securities which may be issued under this indenture is unlimited. The debt securities may be issued from time to time in one or more additional series in fully registered forms. The indenture contains covenants that limit our ability to create liens on principal properties, engage in sale and leaseback transactions, merge or consolidate with another entity or sell, lease or transfer substantially all of our properties or assets to another entity.

We may redeem all or some of these notes, in whole or in part, at any time prior to the date that is one month prior to the maturity date of the 2016 notes or three months prior to the maturity date of the 2021 notes, at stated redemption prices. The notes rank equally in right of payment with all of our existing and future senior indebtedness, effectively junior in right of payment to our existing and future secured indebtedness to the extent of the value of the collateral securing that indebtedness and senior to any subordinated debt that we may incur.

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Term Loan. As of December 31, 2010, the term loan had a balance of $207.2 million and was secured by qualifying investment-grade securities in an amount equal to or greater than the outstanding principal amount of the loan. The term loan was repaid in June 2011 with proceeds from the issuance of the unsecured senior notes.

East Tennessee Notes Payable. In addition to the credit facility and unsecured senior notes, long-term debt includes East Tennessee’s 5.71% unsecured notes payable totaling $150.0 million as of both September 30, 2011 and December 31, 2010. East Tennessee’s debt agreement contains financial covenants which limit the amount of debt that can be outstanding as a percentage of total capital. Failure to maintain the covenants could require East Tennessee to immediately pay down the outstanding balance. As of September 30, 2011, East Tennessee was in compliance with those covenants. In addition, the debt agreement allows for acceleration of payments or termination of the agreements due to nonpayment, or to the acceleration of other significant indebtedness. The debt agreement does not contain provisions that trigger an acceleration of indebtedness based solely on the occurrence of a material adverse change in our financial condition or results of operations.

12. Fair Value Measurements

As of September 30, 2011, there were no assets and liabilities measured at fair value on a recurring basis.

The following table presents, for each of the fair value hierarchy levels, assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2010.

Description	Condensed Consolidated Balance Sheet Caption	December 31, 2010
		Total		Level 1		Level 2		Level 3
		(in millions)
Corporate debt securities	Other investments	$	209.0	$	—	$	209.0	$	—
Total Assets		$	209.0	$	—	$	209.0	$	—
Interest rate swap liabilities	Current liabilities—other	$	2.0	$	—	$	2.0	$	—
Interest rate swap liabilities	Deferred credits and other liabilities—other		0.7		—		0.7		—
Total Liabilities		$	2.7	$	—	$	2.7	$	—

Level 1

Level 1 valuations represent quoted unadjusted prices for identical instruments in active markets.

Level 2 Valuation Techniques

Fair values of our financial instruments that are actively traded in the secondary market, primarily corporate debt securities, are determined based on market-based prices. These valuations may include inputs such as quoted market prices of the exact or similar instruments or alternative pricing sources that may include models or matrix pricing tools, with reasonable levels of price transparency.

For interest rate swaps, we utilize data obtained from multiple sources for the determination of fair value. Both the future cash flows for the fixed-leg and floating-leg of our swaps are discounted to present value. In addition, credit default swap rates are used to develop the adjustments for credit risk embedded in our positions. We believe that since some of the inputs and assumptions for the calculations of fair value are derived from observable market data, a Level 2 classification is appropriate.

Financial Instruments There was no material change in fair value from December 31, 2010 for financial instruments recorded and carried at book value. Judgment is required in interpreting market data to develop the estimates of fair value.

During the 2011 and 2010 periods, there were no adjustments to assets and liabilities measured at fair value on a nonrecurring basis.

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13. Commitments and Contingencies

Environmental. We are subject to various federal, state and local laws and regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. We believe there are no matters outstanding that upon resolution will have a material effect on our consolidated results of operations, financial position or cash flows.

Litigation. We are involved in legal, tax and regulatory proceedings in various forums arising in the ordinary course of business, including matters regarding contracts and payment claims, some of which may involve substantial monetary amounts. We have insurance coverage for certain of these losses should they be incurred. We believe that the final disposition of these proceedings will not have a material effect on our consolidated results of operations, financial position or cash flows.

Legal costs related to the defense of loss contingencies are expensed as incurred. We had no material reserves recorded as of September 30, 2011 or December 31, 2010 related to litigation.

14. Risk Management and Hedging Activities

We are exposed to the impact of changes in interest rates as a result of our issuance of variable and fixed-rate debt. We manage our interest rate exposure by limiting our variable-rate exposures and by monitoring the effects of market changes in interest rates.

We also use “pay fixed—receive floating” interest rate swaps to mitigate our exposure to variable interest rates on loans outstanding under our revolving credit facility. In September 2011, we settled our remaining floating-to-fixed interest rate swaps on $40.0 million of loans outstanding under the revolving credit facility in conjunction with the pay down of our credit facility. As of September 30, 2011, we did not have any derivatives outstanding.

15. Sale of Common Units

On June 14, 2011, we issued 7.2 million common units to the public representing limited partner interests. The net proceeds from this offering were $217.9 million, including our general partner’s proportionate unit purchase of 0.1 million general partner units after deducting the underwriting discount and offering expenses. The net proceeds from this issuance were used to fund a portion of the purchase price of the Big Sandy acquisition, see Note 2 for additional information.

16. New Accounting Pronouncement

There were no significant accounting pronouncements adopted during the nine months ended September 30, 2011 that had a material impact on our consolidated results of operations, financial position or cash flows.

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

INTRODUCTION

Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with the Condensed Consolidated Financial Statements.

Executive Overview

For the three months ended September 30, 2011, we reported net income of $43.5 million compared to $38.4 million for the comparable period in 2010. The increase reflected increased equity earnings from Gulfstream resulting from the acquisition of an additional 24.5% interest in November 2010, partially offset by expected lower contract volumes at Ozark. For the nine months ended September 30, 2011 and 2010, we reported net income of $130.0 million and $110.7 million, respectively. The increase was due primarily to increased equity earnings from Gulfstream resulting from the acquisition of an additional 24.5% interest in November 2010. For the nine months ended September 30, 2011, cash available for distribution was $174.4 million.

In 2011 there have been several significant financing transactions that increased our overall financial flexibility. See Liquidity and Capital Resources—Financing Cash Flows for discussion of these transactions.

On July 1, 2011, we acquired all of the ownership interests of Big Sandy for approximately $390 million in cash. The primary asset acquired is the Big Sandy Pipeline, a FERC-regulated natural gas pipeline system in eastern Kentucky. Big Sandy Pipeline has 171,000 dekatherms per day of capacity and is 68 miles in length. EQT will be the main shipper on the pipeline, with over 80 percent of the pipeline’s capacity.

The East Tennessee Natural Gas Northeastern Tennessee Project (NET) was placed into service on September 1, 2011 as planned. The Market Hub expansion projects went into service during the second quarter 2011; capital expenditures will continue to be incurred throughout the remainder of the year and 2012 for final completion of the facilities. We initially estimated total capital expansion expenditures of approximately $140 million in 2011. As a result of cost of savings anticipated on organic growth projects, we now estimate 2011 capital expansion expenditures of approximately $110 million.

A cash distribution of $0.47 per limited partner unit was declared on October 26, 2011 and is payable on November 14, 2011, representing a 1.1% increase over the previous distribution of $0.465 per limited partner unit paid in August 2011. The Spectra Energy Partners board evaluates each individual quarterly distribution decision based on an assessment of growth in cash available for distribution. Growth in our cash available for distribution over time is dependent on identification of incremental opportunities for organic expansion, third party acquisitions or acquisitions from Spectra Energy.

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RESULTS OF OPERATIONS

	Three Months Ended September 30,							Nine Months Ended September 30,
	2011		2010		Increase (Decrease)			2011		2010		Increase (Decrease)
	(in millions)
Operating revenues	$	52.9	$	49.0	$	3.9		$	147.1	$	146.9	$	0.2
Operating, maintenance and other expense		20.0		17.3		2.7			58.6		55.5		3.1
Depreciation and amortization		9.7		7.4		2.3			24.9		22.2		2.7
Operating income		23.2		24.3		(1.1	)		63.6		69.2		(5.6	)
Equity in earnings of unconsolidated affiliates (a)		27.3		18.4		8.9			81.9		54.0		27.9
Other income and expenses, net		0.9		0.2		0.7			2.2		0.4		1.8
Interest income		—		—		—			0.3		0.1		0.2
Interest expense		7.7		4.3		3.4			17.2		12.2		5.0
Earnings before income taxes		43.7		38.6		5.1			130.8		111.5		19.3
Income tax expense		0.2		0.2		—			0.8		0.8		—
Net income	$	43.5	$	38.4	$	5.1		$	130.0	$	110.7	$	19.3
Net cash provided by operating activities	$	51.4	$	50.8	$	0.6		$	170.5	$	144.5	$	26.0
Adjusted EBITDA (b)		32.9		31.7		1.2			88.5		91.4		(2.9	)
Cash Available for Distribution (b)		69.3		50.4		18.9			174.4		139.5		34.9

(a) During the fourth quarter of 2010, we purchased an additional 24.5% interest in Gulfstream which is accounted for as an equity method investment. The equity earnings related to the additional interests are recorded prospectively from the date of acquisition.

(b) See “Reconciliation of Non-GAAP Measures” for a reconciliation of this measure to its most directly comparable financial measures calculated and presented in accordance with GAAP.

Three Months Ended September 30, 2011 compared to same period in 2010

Operating Revenues. The $3.9 million increase was driven by $8.4 million related to the July 2011 acquisition of the Big Sandy assets and $1.9 million from the NET project placed in service in September 2011, partially offset by an anticipated decrease at Ozark of $4.2 million from lower contracted volumes and rates, and $1.2 million resulting from lower throughput volumes.

Operating, Maintenance and Other Expense. The $2.7 million increase was driven primarily by a $2.4 million increase in operating costs associated with the Big Sandy acquisition.

Depreciation and Amortization. The $2.3 million increase was driven mainly by the acquisition of the Big Sandy assets.

Equity in Earnings of Unconsolidated Affiliates. The $8.9 million increase includes an $8.0 million increase in earnings from Gulfstream and a $0.9 million increase from Market Hub. During the fourth quarter of 2010, we purchased an additional 24.5% interest in Gulfstream from a subsidiary of Spectra Energy, increasing our ownership in Gulfstream to 49%. The additional ownership interest contributed an $8.1 million increase to Gulfstream earnings compared to the prior year quarter.

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The following discussion explains the factors affecting the earnings of Gulfstream and Market Hub, each representing 100% of the earnings drivers of those entities.

	Three Months Ended September 30,
	2011			2010		Increase (Decrease)
	(in millions)
Gulfstream
Operating revenues	$	69.7		$	69.5	$	0.2
Operating, maintenance and other expense		9.8			9.6		0.2
Depreciation and amortization		8.9			8.8		0.1
Other income and (expenses), net		(0.3	)		0.1		(0.4	)
Interest expense		17.7			17.4		0.3
Net income	$	33.0		$	33.8	$	(0.8	)
Spectra Energy Partners’ share	$	16.2		$	8.2	$	8.0

Gulfstream—Owned 49.0%

Revenue increases of $2.6 million related to the Phase V expansion project that went in-service April 1, 2011 were offset by lower interruptible, short term firm, and park and loan revenue due to more favorable weather conditions in 2010.

	Three Months Ended September 30,
	2011		2010		Increase (Decrease)
	(in millions)
Market Hub
Operating revenues	$	31.0	$	29.2	$	1.8
Operating, maintenance and other expense		5.9		5.4		0.5
Depreciation and amortization		2.7		3.6		(0.9	)
Interest income		—		0.1		(0.1	)
Income tax expense		0.1		—		0.1
Net income	$	22.3	$	20.3	$	2.0
Spectra Energy Partners’ share	$	11.1	$	10.2	$	0.9

Market Hub—Owned 50%

Market Hub’s net income increased $2.0 million for the three-month period ended September 30, 2011 compared to the same period in 2010. The increase was driven mainly by:

• a $1.8 million increase in revenues driven by the completion of the phase-in of expansion projects, partially offset by lower contract renewal rates, and

• a $0.9 million decrease in depreciation expense due to a change in the estimated useful life of storage facilities, partially offset by

• a $0.5 million increase in operating, maintenance and other expenses mainly due to lower net fuel recoveries.

Other Income and Expenses net. The $0.7 million increase is primarily due to an increase in the equity portion of allowance for funds used during construction (AFUDC) related to higher capital expenditures in 2011 on the NET project.

Interest Expense. The $3.4 million increase is due to the issuance of $500.0 million of unsecured senior notes on June 9, 2011.

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Nine Months Ended September 30, 2011 compared to same period in 2010

Operating Revenues. An $8.4 million increase associated with the acquisition of the Big Sandy assets in July 2011, a $2.2 million increase at East Tennessee mostly due to increased contracted volumes related to the Glade Springs expansion project and higher fees due to colder weather in the first quarter of 2011, and a $1.9 million increase related to the NET expansion project placed in-service September 1, 2011, were offset by an anticipated decrease in Ozark’s contracted volumes and rates of $8.9 million and $2.1 million of reduced throughput at Ozark.

Operating, Maintenance and Other Expense. The $3.1 million increase was driven mainly by:

• a $2.4 million increase in operating costs due to the acquisition of the Big Sandy assets, and

• a $0.9 million increase due to transaction costs associated with the acquisition of Big Sandy.

Depreciation and Amortization. The $2.7 million increase was driven primarily by the acquisition of the Big Sandy assets in July 2011.

Equity in Earnings of Unconsolidated Affiliates. The $27.9 million increase includes a $24.7 million increase in earnings from Gulfstream and a $3.2 million increase in earnings from Market Hub. During the fourth quarter of 2010, we purchased an additional 24.5% interest in Gulfstream from a subsidiary of Spectra Energy, increasing our ownership in Gulfstream to 49%. The additional interest accounted for $24.2 million of the increase in Gulfstream earnings compared to the prior year.

The following discussion explains the factors affecting the equity earnings of Gulfstream and Market Hub, each representing 100% of the earnings drivers of those entities.

	Nine Months Ended September 30,
	2011		2010		Increase (Decrease)
	(in millions)
Gulfstream
Operating revenues	$	205.0	$	203.5	$	1.5
Operating, maintenance and other expense		27.3		28.5		(1.2	)
Depreciation and amortization		26.5		26.3		0.2
Other income and expenses, net		—		0.6		(0.6	)
Interest expense		52.4		52.4		—
Net income	$	98.8	$	96.9	$	1.9
Spectra Energy Partners’ share	$	48.4	$	23.7	$	24.7

Gulfstream—Owned 49.0%

Gulfstream’s net income increased $1.9 million for the nine-month period ended September 30, 2011 compared to the same period in 2010. The increase was driven mainly by:

• a $1.5 million increase in revenues mainly due to a $5.1 million increase associated with the Phase V expansion project that went in-service on April 1, 2011, partially offset by $2.7 million of higher interruptible, short term firm revenue and park and loan revenue in 2010 due to more favorable weather conditions and

• a $1.2 million decrease in operating, maintenance and other expense related mainly to $2.3 million lower ad valorem and other tax expense mainly due to a favorable 2010 valuation true-up in the first quarter of 2011 and a sales and use tax adjustment, partially offset by a $0.6 million increase in higher administrative expenses, partially offset by

• a $0.6 million decrease in other income and expenses primarily due to higher capital work performed on behalf of a customer in 2010.

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	Nine Months Ended September 30,
	2011		2010		Increase (Decrease)
	(in millions)
Market Hub
Operating revenues	$	92.1	$	88.1	$	4.0
Operating, maintenance and other expense		16.9		17.4		(0.5	)
Depreciation and amortization		8.0		10.7		(2.7	)
Other income and expenses, net		—		0.6		(0.6	)
Interest income		0.1		0.2		(0.1	)
Income tax expense		0.2		0.2		—
Net income	$	67.1	$	60.6	$	6.5
Spectra Energy Partners’ share	$	33.5	$	30.3	$	3.2

Market Hub—Owned 50%

Market Hub’s net income increased $6.5 million for the nine-month period in 2011 compared to the same period in 2010. The increase was driven mainly by:

• a $4.0 million increase in revenues driven by the continued phase-in of expansion projects, partially offset by lower contract renewal rates,

• a $2.7 million decrease in depreciation expense due to a change in the estimated useful life of storage facilities, partially offset by

• a $0.6 million decrease in other income and expenses primarily due to a 2010 right-of-way granted to a third party at Moss Bluff.

Other Income and Expenses, net. The $1.8 million increase is primarily due to an increase in the equity portion of AFUDC related to higher capital expenditures in 2011 on the NET project.

Interest Expense. The $5.0 million increase is due to the issuance of $500.0 million of unsecured senior notes on June 9, 2011.

Matters Affecting Future Results

Our interstate pipeline operations are subject to pipeline safety regulation administered by the Pipeline and Hazardous Materials Safety Administration (PHMSA) of the U.S. Department of Transportation. These laws and regulations require us to comply with a significant set of requirements for the design, construction, maintenance and operation of our interstate pipelines.

In August 2011, the PHMSA initiated an Advance Notice of Proposed Rulemaking announcing its consideration of substantial revisions in its regulations to increase pipeline safety. Legislative proposals have been introduced in Congress that would strengthen the PHMSA’s enforcement and penalty authority, and expand the scope of its oversight. The PHMSA also has issued an Advisory Bulletin which among other things, advises pipeline operators that if they are relying on design, construction, inspection, testing, or other data to determine the pressures at which their pipelines should operate, the records of that data must be traceable, verifiable and complete. Such legislative and regulatory changes may have a material adverse effect on our operations, earnings, financial condition and cash flows through more stringent and comprehensive safety regulations and higher penalties for the violation of those regulations.

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Adjusted EBITDA and Cash Available for Distribution

Adjusted EBITDA

We define our Adjusted Earnings Before Interest, Taxes, Depreciation and Amortization (EBITDA) as Net Income plus Interest Expense, Income Taxes and Depreciation and Amortization less our Equity in Earnings of Gulfstream and Market Hub, Interest Income, and Other Income and Expenses, Net, which primarily consists of non-cash AFUDC. Adjusted EBITDA is a non-GAAP measure. Because Adjusted EBITDA excludes some, but not all, items that affect net income and is defined differently by companies in our industry, our definition of Adjusted EBITDA may not be comparable to similarly titled measures of other companies. Adjusted EBITDA should not be considered an alternative to Net Income, Operating Income, cash from operations or any other measure of financial performance or liquidity presented in accordance with GAAP.

Adjusted EBITDA is used as a supplemental financial measure by our management and by external users of our financial statements to assess:

• the financial performance of assets without regard to financing methods, capital structure or historical cost basis;

• the ability to generate cash sufficient to pay interest on indebtedness and to make distributions to partners; and

• operating performance and return on invested capital as compared to those of other publicly traded limited partnerships that own energy infrastructure assets, without regard to financing methods and capital structure.

Significant drivers of variances in Adjusted EBITDA between the periods presented are substantially the same as those previously discussed under Results of Operations.

Cash Available for Distribution

We define Cash Available for Distribution as our Adjusted EBITDA plus Cash Available for Distribution from Gulfstream and Market Hub and net preliminary project costs, less net cash paid for interest expense, cash paid for income tax expense, and maintenance capital expenditures, excluding the impact of reimbursable projects. Cash Available for Distribution does not reflect changes in working capital balances. Cash Available for Distribution for Gulfstream and Market Hub is defined on a basis consistent with us. Cash Available for Distribution should not be viewed as indicative of the actual amount of cash we plan to distribute for a given period.

Cash Available for Distribution is a non-GAAP measure and should not be considered an alternative to Net Income, Operating Income, cash from operations or any other measure of financial performance or liquidity presented in accordance with GAAP. Cash Available for Distribution excludes some, but not all, items that affect Net Income and Operating Income and these measures may vary among other companies. Therefore, Cash Available for Distribution as presented may not be comparable to similarly titled measures of other companies.

Significant drivers of variances in Cash Available for Distribution between the periods presented are substantially the same as those previously discussed under Results of Operations. Other drivers include the timing of certain cash outflows, such as capital expenditures for maintenance and the scheduled payments of interest.

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Spectra Energy Partners

Reconciliation of Net Income to Non-GAAP “Adjusted EBITDA” and “Cash Available for Distribution”

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Net income	$	43.5	$	38.4	$	130.0	$	110.7
Add:
Interest expense		7.7		4.3		17.2		12.2
Income tax expense		0.2		0.2		0.8		0.8
Depreciation and amortization		9.7		7.4		24.9		22.2
Less:
Equity in earnings of Gulfstream		16.2		8.2		48.4		23.7
Equity in earnings of Market Hub		11.1		10.2		33.5		30.3
Interest income		—		—		0.3		0.1
Other income and expenses, net		0.9		0.2		2.2		0.4
Adjusted EBITDA		32.9		31.7		88.5		91.4
Add:
Cash Available for Distribution from Gulfstream		29.4		14.7		69.6		34.3
Cash Available for Distribution from Market Hub		11.8		11.4		36.5		34.7
Preliminary project costs, net		—		—		—		—
Less:
Cash paid for interest expense, net		0.8		2.0		8.9		9.7
Cash paid for income tax expense		—		0.2		—		0.7
Maintenance capital expenditures		4.0		5.2		11.3		10.5
Cash Available for Distribution	$	69.3	$	50.4	$	174.4	$	139.5

Spectra Energy Partners

Reconciliation of Net Cash Provided by Operating Activities to Non-GAAP “Adjusted EBITDA” and “Cash Available for Distribution”

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	(in millions)
Net cash provided by operating activities	$	51.4		$	50.8		$	170.5		$	144.5
Interest income		—			—			(0.3	)		(0.1	)
Interest expense		7.7			4.3			17.2			12.2
Income tax expense—current		—			0.1			0.1			0.4
Distributions received from Gulfstream and Market Hub		(23.5	)		(18.1	)		(90.1	)		(59.8	)
Changes in operating working capital and other		(2.7	)		(5.4	)		(8.9	)		(5.8	)
Adjusted EBITDA		32.9			31.7			88.5			91.4
Add:
Cash Available for Distribution from Gulfstream		29.4			14.7			69.6			34.3
Cash Available for Distribution from Market Hub		11.8			11.4			36.5			34.7
Preliminary project costs, net		—			—			—			—
Less:
Cash paid for interest expense, net		0.8			2.0			8.9			9.7
Cash paid for income tax expense		—			0.2			—			0.7
Maintenance capital expenditures		4.0			5.2			11.3			10.5
Cash Available for Distribution	$	69.3		$	50.4		$	174.4		$	139.5

25

Gulfstream

Reconciliation of Non-GAAP “Adjusted EBITDA” and “Cash Available for Distribution”

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011		2010
	(in millions)
Net income	$	33.0		$	33.8	$	98.8	$	96.9
Add:
Interest expense		17.7			17.4		52.4		52.4
Depreciation and amortization		8.9			8.8		26.5		26.3
Less:
Other income and (expenses), net		(0.3	)		0.1		—		0.6
Adjusted EBITDA—100%		59.9			59.9		177.7		175.0
Add:
Preliminary project costs, net		0.3			0.2		0.7		0.4
Less:
Cash paid for interest expense, net		—			—		35.2		35.1
Maintenance capital expenditures		0.2			0.3		1.1		0.5
Cash Available for Distribution—100%	$	60.0		$	59.8	$	142.1	$	139.8
Adjusted EBITDA—Spectra Energy Partners’ Share (a)	$	29.3		$	14.7	$	87.0	$	42.9
Cash Available for Distribution—Spectra Energy Partners’ Share (a)		29.4			14.7		69.6		34.3

(a) During the fourth quarter of 2010, we purchased an additional 24.5% interest in Gulfstream which is accounted for as an equity method investment. The equity earnings related to the additional interest was recorded as of the date of the acquisition.

Market Hub

Reconciliation of Non-GAAP “Adjusted EBITDA” and “Cash Available for Distribution”

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011			2010
	(in millions)
Net income	$	22.3	$	20.3	$	67.1		$	60.6
Add:
Interest expense		—		—		—			—
Income tax expense		0.1		—		0.2			0.2
Depreciation and amortization		2.7		3.6		8.0			10.7
Less:
Interest income		—		0.1		0.1			0.2
Other income and expenses, net		—		—		—			0.6
Adjusted EBITDA—100%		25.1		23.8		75.2			70.7
Less:
Cash paid (received) for interest expense, net		—		—		(0.1	)		(0.1	)
Cash paid for income tax expense		—		—		—			—
Maintenance capital expenditures		1.6		0.9		2.4			1.4
Cash Available for Distribution—100%	$	23.5	$	22.9	$	72.9		$	69.4
Adjusted EBITDA—50%	$	12.5	$	11.9	$	37.6		$	35.4
Cash Available for Distribution—50%		11.8		11.4		36.5			34.7

26

Goodwill Impairment Test

We completed our annual goodwill impairment test as of April 1, 2011 and no impairments were identified. All of our goodwill is in our Gas Transportation and Storage segment. The carrying amount of goodwill increased from $267.9 million at December 31, 2010 to $461.7 million at September 30, 2011 primarily due to the acquisition of Big Sandy on July 1, 2011.

We primarily use a discounted cash flow analysis to determine fair value for our reporting unit. Key assumptions in the determination of fair value include the use of an appropriate discount rate and estimated future cash flows. In estimating cash flows, we incorporate expected long-term growth rates in key markets served by our operations, regulatory stability, and the ability to renew contracts, as well as other factors that affect our revenue, expense and capital expenditure projections.

The long-term growth rates used for our reporting unit reflect continued expansion of our assets, driven by new natural gas supplies such as shale gas and increasing demand for natural gas transportation capacity on our pipeline systems primarily as a result of forecasted growth in natural gas fired electric generation plants. We assumed a long-term growth rate of 3% for our 2011 goodwill impairment analysis. Had we assumed a 100 basis point lower growth rate for our reporting unit, there would have been no impairment of goodwill.

We continue to monitor the effects of the economic downturn that global economies are currently facing on the long-term cost of capital utilized to calculate our reporting unit fair values. In evaluating our reporting unit for our 2011 goodwill impairment analysis, we assumed a weighted-average cost of capital that market participants would use in evaluating our business of 8.4%. Had we assumed a 100 basis point increase in the weighted-average cost of capital for our reporting unit, there would have been no impairment of goodwill.

Based on the results of our annual impairment testing, the fair value of our reporting unit at April 1, 2011 significantly exceeded its carrying value. No triggering events or changes in circumstances occurred during the period April 1, 2011 (our testing date) through September 30, 2011 that would warrant re-testing for goodwill impairment.

LIQUIDITY AND CAPITAL RESOURCES

We will rely upon cash flows from operations, including cash distributions received from Gulfstream and Market Hub, and various financing transactions, to fund our liquidity and capital requirements for the next 12 months. As of September 30, 2011, we had negative net working capital of $44.8 million compared to a negative $0.6 million of working capital as of December 31, 2010. The September 30, 2011 and the December 31, 2010 balances included $28.5 million and $34.0 million, respectively for the note payable on demand to Market Hub. As of September 30, 2011, the decrease in net working capital was due mainly to the increase in capital accruals related to expansion projects and reclassification of current maturities of long-term debt of $10.0 million.

We have access to a credit facility, with available capacity of $490.0 million at September 30, 2011, and additional borrowings available under the note payable with Market Hub of $21.5 million, which are used to manage working capital requirements. Given that we expect to continue to pursue expansion opportunities over the next several years, capital resources may continue to include commercial paper, short-term borrowings under our current credit facility and possibly securing additional sources of capital including debt and/or equity.

In October 2011, we executed a new $700.0 million credit facility to replace our existing $500.0 million credit facility which was due to expire in July 2012. After executing the new credit facility, we established a commercial paper program providing for the issuance of up to $700.0 million of commercial paper to fund our short-term borrowing needs, including the initial funding of capital expenditures. Our new credit facility, which expires in October 2016, is available to repay our commercial paper, if necessary. Amounts outstanding under the commercial paper program reduce the borrowings available under our credit facility.

27

Operating Cash Flows

Net cash provided by operating activities totaled $170.5 million in the first nine months of 2011 compared to $144.5 million during the same period in 2010. This increase was driven primarily by distributions received from Gulfstream related to the additional 24.5% interest acquired in November 2010.

Investing Cash Flows

Cash flows used in investing activities totaled $267.6 million in the first nine months of 2011 compared to $32.4 million of cash used in the same period in 2010. The change was driven mainly by:

• $389.6 million for the acquisition of Big Sandy in 2011, and

• a $58.3 million increase in capital expenditures primarily due to the NET expansion project at East Tennessee which went into service in September of 2011, partially offset by

• $199.5 million of net proceeds in 2011 from the liquidation of available-for-sale securities that were held as collateral for our term loan.

Capital and Investment Expenditures

	Nine Months Ended September 30,
	2011		2010
	(in millions)
Capital Expenditures
Gas Transportation and Storage	$	78.0	$	19.7
Investment Expenditures
Gulfstream		3.8		2.7
Market Hub		11.7		16.1
Total capital and investment expenditures	$	93.5	$	38.5

Capital and investment expenditures for the nine months ended September 30, 2011 totaled $93.5 million and included $82.5 million for expansion projects and $11.0 million for maintenance and other projects.

We initially estimated total capital and investment expenditures of approximately $152 million, of which $140 million was expected to be used for expansion projects and $12 million for maintenance and other projects. Our 2011 organic growth projects have experienced significant cost savings. As a result, we estimate 2011 expansion expenditures of approximately $110 million, excluding the acquisition of Big Sandy discussed below. Given our objective of growth through acquisitions and expansions of existing assets, we anticipate that we will continue to invest significant amounts of capital to grow and acquire assets. Expansion capital expenditures may vary significantly based on investment opportunities.

On July 1, 2011, we acquired all of the ownership interests of Big Sandy for approximately $390 million in cash. See Note 2 of Notes to Condensed Consolidated Financial Statements for further discussion.

We continue to evaluate customers’ needs for incremental expansion opportunities at East Tennessee, Gulfstream and Market Hub. In addition, we are assessing the needs of our Ozark customers for additional transportation services. We expect that significant natural gas infrastructure, including both natural gas transportation and storage with links to growing gas supplies and markets, will be needed over time to serve growth in gas-fired power generation, oil-to-gas conversions, industrial development and attachments to new gas supply.

28

Financing Cash Flows

Net cash provided by financing activities totaled $73.5 million in the first nine months of 2011 compared to $113.9 million cash used in the same period in 2010. This change was driven mainly by:

• $217.9 million of proceeds from the 2011 issuance of common units, partially offset by

• $30.7 million increase in distributions to partners in 2011 compared to the same period in 2010, as a result of increased distribution rates and limited partner units outstanding and higher incentive distribution rights as a result of higher available cash for distribution.

The net result of financing transactions in the 2011 was a slight decrease of $1.9 million to total debt outstanding.

On June 9, 2011, we issued $500.0 million aggregate principal amount of unsecured senior notes, including $250.0 million 2.95% senior note due 2016 and $250.0 million 4.60% senior notes due 2021. The net proceeds from the offering were used to repay all of the outstanding borrowings under our term loan and a significant portion of the funds borrowed under our credit facility. The remaining balance of the proceeds was used for general partnership purposes.

On June 14, 2011, we issued 7.2 million common units to the public, representing limited partner interests, and 0.1 million general partner units to Spectra Energy resulting in net proceeds of $217.9 million and a reduction in Spectra Energy’s ownership interest in us from 69% to 64%. The proceeds from this offering were used to fund a portion of the purchase price of Big Sandy on July 1, 2011.

Available Credit Facility and Restrictive Debt Covenants. In October 2011, we entered into a new $700.0 million credit facility which replaced our $500.0 million credit facility. Our new credit facility expires in 2016 and replaces the facility that was scheduled to expire in 2012. See Note 11 of Notes to Condensed Consolidated Financial Statements for a discussion of the available credit facility and related financial and other covenants.

Credit Ratings. In June 2011, we received senior unsecured credit ratings of BBB/Stable from Standard and Poor’s and Fitch Ratings and Baa3/Stable from Moody’s investor services. Our credit ratings are dependent upon, among other factors, our ability to generate sufficient cash to fund capital and investment expenditures, our results of operations, market conditions, the leverage of Spectra Energy and other factors. Our credit ratings could impact our ability to raise capital in the future, impact the cost of capital and, as a result, have an impact on our liquidity.

Cash Distributions. As previously discussed, a cash distribution of $0.47 per limited partner unit was declared in October 2011, payable on November 14, 2011, representing a 1.1% increase over the previous distribution of $0.465 per limited partner unit and the sixteenth consecutive quarterly increase.

Other Financing Matters. We have an effective shelf registration statement on file with the Securities and Exchange Commission (SEC) to register the issuance of unspecified amounts of limited partner common units and various debt securities.

OTHER ISSUES

New Accounting Pronouncement. See Note 16 of Notes to Condensed Consolidated Financial Statements for discussion.

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

Our exposure to market risk is described in Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2010. We believe the exposure to market risk has not changed materially.

29

Item 4. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed by us in the reports we file or submit under the Securities Exchange Act of 1934 (Exchange Act) is recorded, processed, summarized, and reported, within the time periods specified by the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to provide reasonable assurance that information required to be disclosed by us in the reports we file or submit under the Exchange Act is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Under the supervision and with the participation of the management of Spectra Energy Partners (DE) GP, LP (our General Partner), including the Chief Executive Officer and Chief Financial Officer, we have evaluated the effectiveness of our disclosure controls and procedures (as such term is defined in Rule 13a-15(e) and 15d-15(e) under the Exchange Act) as of September 30, 2011, and, based upon this evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that these controls and procedures are effective at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

Under the supervision and with the participation of the management of our General Partner, including the Chief Executive Officer and Chief Financial Officer, we have evaluated changes in internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the fiscal quarter ended September 30, 2011 and found no change that has materially affected, or is reasonably likely to materially affect, internal control over financial reporting.

30

PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

We have no material pending legal proceedings that are required to be disclosed hereunder. For information regarding other legal proceedings and environmental matters, see Note 13 of Notes to Condensed Consolidated Financial Statements, which information is incorporated by reference into this Part II.

Item 1A. Risk Factors.

In addition to the other information set forth in this report, careful consideration should be given to the factors discussed in Part I, “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2010, which could materially affect our financial condition or future results. Other than the risk factor below, there have been no material changes to those risk factors.

We are subject to pipeline safety laws and regulations, compliance with which may require significant capital expenditures, increase our cost of operations and affect or limit our business plans.

Our interstate pipeline operations are subject to pipeline safety regulation administered by the Pipeline and Hazardous Materials Safety Administration (the PHMSA) of the U.S. Department of Transportation. These laws and regulations require us to comply with a significant set of requirements for the design, construction, maintenance and operation of our interstate pipelines. These regulations, among other things, include requirements to monitor and maintain the integrity of our pipelines. The regulations determine the pressures at which our pipelines can operate.

In 2010, serious pipeline incidents on systems unrelated to ours focused the attention of Congress and the public on pipeline safety. Legislative proposals have been introduced in Congress that would strengthen the PHMSA’s enforcement and penalty authority, and expand the scope of its oversight. In August 2011, the PHMSA initiated an Advance Notice of Proposed Rulemaking announcing its consideration of substantial revisions in its regulations to increase pipeline safety. The PHMSA also has issued guidance that states it will focus near-term enforcement efforts on recordkeeping and integrity management, following urgent National Transportation Safety Board recommendations related to pipeline pressure and recordkeeping. Because it is uncertain what legislation or regulatory changes will be enacted, we cannot determine the impact that such legislation or regulatory changes may have on our operations or financial condition at this time. Pipeline failures or failure to comply with applicable regulations could result in reduction of allowable operating pressures as authorized by the PHMSA, which would reduce available capacity on our pipelines. Should any of these risks materialize, it may have a material adverse effect on our operations, earnings, financial condition and cash flows.

Item 6. Exhibits.

Any agreements included as exhibits to this Form 10-Q may contain representations and warranties by each of the parties to the applicable agreement. These representations and warranties have been made solely for the benefit of the other parties to the applicable agreement and:

• were not intended to be treated as categorical statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate;

• may have been qualified by disclosures that were made to the other party in connection with the negotiation of the applicable agreement;

• may apply contract standards of “materiality” that are different from “materiality” under the applicable securities laws; and

• were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement.

31

We acknowledge that, notwithstanding the inclusion of the foregoing cautionary statements, we are responsible for considering whether additional specific disclosures of material information regarding material contractual provisions are required to make the statements in this Form 10-Q not misleading.

(a) Exhibits

Exhibit Number
10.1	Credit Agreement, dated as of October 18, 2011, among Spectra Energy Partners, LP, the Initial Lenders and Issuing Banks named therein, and Citibank, N.A., as Administrative Agent (filed as Exhibit No. 10.1 to Form 8-K of Spectra Energy Partners, LP on October 20, 2011).
*10.2	Second Amendment to Limited Liability Company Agreement of Gulfstream Natural Gas System, L.L.C., dated as of September 9, 2011.
*31.1	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*32.1	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*32.2	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*101.INS	XBRL Instance Document.
*101.SCH	XBRL Taxonomy Extension Schema.
*101.CAL	XBRL Taxonomy Extension Calculation Linkbase.
*101.DEF	XBRL Taxonomy Extension Definition Linkbase.
*101.LAB	XBRL Taxonomy Extension Label Linkbase.
*101.PRE	XBRL Taxonomy Extension Presentation Linkbase.

* Filed herewith

32

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 thereunto duly authorized.

	SPECTRA ENERGY PARTNERS, LP
	By:	Spectra Energy Partners (DE) GP, LP, its general partner
	By:	Spectra Energy Partners GP, LLC, its general partner
Date: November 8, 2011		/S/    GREGORY J. RIZZO
		Gregory J. Rizzo President and Chief Executive Officer
Date: November 8, 2011		/S/    LAURA BUSS SAYAVEDRA
		Laura Buss Sayavedra Vice President and Chief Financial Officer

33

EX-10.2

EXHIBIT 10.2

Execution Copy

Second Amendment to

Limited Liability Company Agreement

of Gulfstream Natural Gas System, L.L.C.

This Second Amendment to Limited Liability Company Agreement of Gulfstream Natural Gas System, L.L.C. (this “Amendment”) is entered into as of September 9, 2011, by and between Spectra Energy Southeast Pipeline Corporation (“SESP”), WGP Gulfstream Pipeline Company, L.L.C. (“WGPG”), Spectra Energy Partners, LP (“SEP”), and Williams Partners Operating LLC (“WPO”).

Recitals

SESP, WGPG, SEP and WPO are the Members of Gulfstream Natural Gas System, L.L.C., a Delaware limited liability company (the “Company”), and are parties to the Second Amended and Restated Limited Liability Company Agreement of Gulfstream Natural Gas System, L.L.C. dated as of February 28, 2007, as amended March 22, 2010 (as so amended, the “Agreement”).

SESP, WGPG, SEP and WPO desire to amend the Agreement as hereinafter set forth.

NOW THEREFORE, SESP, WGPG, SEP and WPO hereby agree as follows:

1. Any capitalized term used but not defined in this Amendment shall have the meaning ascribed to such term in the Agreement.

2. The Parties hereby agree to amend the Agreement by deleting subsections (I) and (II) of Section 3.03(b)(iv)(E) of the Agreement in its entirety and replacing them with the following:

“(I) Tax Termination Make-Whole Payments. In connection with any Dispositions (including, without limitation, Deemed Tax Dispositions) by any Member hereunder, the Parties desire to address the possibility of a constructive termination of the Company under §708(b)(1)(B) of the Code (a “Tax Termination”) and to allocate responsibility for any damages resulting therefrom.

(1) In the event a Member (“Transferring Member”) Disposes of any portion of its Membership Interest which when combined with all other Dispositions of Membership Interests of the Company by all Members during the twelve-month period preceding such Disposition results in a Tax Termination, such Transferring Member shall pay to the other Members who are Members at the date of the Tax Termination an amount equal to the Damages (as defined below). Notwithstanding the foregoing in this subsection (1), no payments under this subsection (1) shall be due from a Transferring Member (i) for any Disposition of any Membership Interest pursuant to exercise of a Preferential Right, (ii) for any Disposition of any Membership Interest where such Disposition is in connection with a transaction, or a series of related transactions, where all of the selling Members are Affiliates of each other and all of the buying Members are already Members at the time of the sale and not Affiliates of any of the selling Members, or (iii) for any Disposition of any Membership Interest where such Disposition is in connection with a transaction, or a series of related transactions, where all of the selling Members collectively are selling 100% of the Membership Interests in the Company and all of the buying parties are not already Members at the time of the sale and not Affiliates of any of the selling Members.

(2) “Damages” shall be deemed to mean, with respect to any Tax Termination, an amount equal to the sum of (a) a damage amount (the “Damage Amount”) calculated as the product of (i) the difference between (A) the net present value as of the date of such Tax Termination, using a discount rate of 7%, of the amount of tax depreciation allocable to a Member from the Company for each future taxable period calculated as if such Tax Termination had not occurred but with all other facts unchanged, minus (B) the net present value as of the date of such Tax Termination, using a discount rate of 7%, of the amount of tax depreciation allocable to such Member from the Company for each future taxable period calculated taking into account such Tax Termination, and (ii) the sum of the highest marginal federal income tax rate as a percentage of taxable income applicable to a U.S. corporation for the taxable year in which the Tax Termination occurs, and 4% (as a proxy for applicable state income taxes) (collectively, the “Aggregate Tax Rate”); and (b) a gross-up amount calculated as (i) the Damage Amount divided by 1.0 minus the Aggregate Tax Rate, (ii) minus the Damage Amount.

(3) A Transferring Member shall make any payment required under clause (1) above to the other Members within twenty (20) days after the end of the month in which the relevant Tax Termination occurs.

(4) Article 11 hereof shall govern any Dispute regarding the amount of Damages payable under this subsection (I) of Section 3.03(b)(iv)(E).

(II) Intentionally Omitted.”

3. Except as modified herein, the Agreement remains in full force and effect, and all references therein to the “Agreement” shall be deemed to mean the Agreement as amended by this Amendment. This Amendment is governed by and shall be construed in accordance with the law of the State of Delaware, excluding any conflict-of-laws rule or principle that might refer to the governance of construction of this Amendment to the law of another jurisdiction. This Amendment may be executed in one or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Execution of this Amendment by facsimile signature shall be deemed to be, and shall have the same effect as, execution by original signature.

Signature page follows.

2

IN WITNESS WHEREOF, duly authorized representatives of the Members hereby execute multiple originals of this Second Amendment to Limited Liability Company Agreement of Gulfstream Natural Gas System, L.L.C. as of the date first above written.

SPECTRA ENERGY SOUTHEAST PIPELINE CORPORATION
By:	/s/ R. Mark Fiedorek
Name:	R. Mark Fiedorek
Title:	President
SPECTRA ENERGY PARTNERS, LP
By: Spectra Energy Partners GP, LLC, on behalf of
Spectra Energy Partners (DE) GP, LP, its General Partner
By:	/s/ Laura Buss Sayavedra
Name:	Laura Buss Sayavedra
Title:	Vice President and Chief Financial Officer
WGP GULFSTREAM PIPELINE COMPANY, L.L.C.
By:	/s/ Randall L. Barnard
Name:	Randall L. Barnard
Title:	Senior Vice President
WILLIAMS PARTNERS OPERATING LLC
By:	Williams Partners L.P., its sole member
By:	Williams Partners GP LLC, its general partner
By:	/s/ Randall L. Barnard
Name:	Randall L. Barnard
Title:	Senior Vice President

3

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Gregory J. Rizzo, certify that:

1) I have reviewed this quarterly report on Form 10-Q of Spectra Energy Partners, LP;

2) Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3) Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4) The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5) The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2011	/S/    GREGORY J. RIZZO
	Gregory J. Rizzo President and Chief Executive Officer Spectra Energy Partners GP, LLC General Partner of Spectra Energy Partners (DE) GP, LP General Partner of Spectra Energy Partners, LP

EX-31.2

EXHIBIT 31.2

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Laura Buss Sayavedra, certify that:

1) I have reviewed this quarterly report on Form 10-Q of Spectra Energy Partners, LP;

2) Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3) Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4) The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5) The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2011	/S/    LAURA BUSS SAYAVEDRA
	Laura Buss Sayavedra Vice President and Chief Financial Officer Spectra Energy Partners GP, LLC General Partner of Spectra Energy Partners (DE) GP, LP General Partner of Spectra Energy Partners, LP

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Spectra Energy Partners, LP on Form 10-Q for the period ending September 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gregory J. Rizzo, President and Chief Executive Officer of Spectra Energy Partners GP, LLC, general partner of Spectra Energy Partners (DE) GP, LP, general partner of Spectra Energy Partners, LP, certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Spectra Energy Partners, LP.

Date: November 8, 2011	/S/    GREGORY J. RIZZO
	Gregory J. Rizzo President and Chief Executive Officer Spectra Energy Partners GP, LLC General Partner of Spectra Energy Partners (DE) GP, LP General Partner of Spectra Energy Partners, LP

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Spectra Energy Partners, LP on Form 10-Q for the period ending September 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Laura Buss Sayavedra, Vice President and Chief Financial Officer of Spectra Energy Partners GP, LLC, general partner of Spectra Energy Partners (DE) GP, LP, general partner of Spectra Energy Partners, LP, certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Spectra Energy Partners, LP.

Date: November 8, 2011	/S/    LAURA BUSS SAYAVEDRA
	Laura Buss Sayavedra Vice President and Chief Financial Officer Spectra Energy Partners GP, LLC General Partner of Spectra Energy Partners (DE) GP, LP General Partner of Spectra Energy Partners, LP

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Debt and Credit Facility - Additional Information (Detail) (USD $) In Millions, unless otherwise specified									1 Months Ended
	Sep. 30, 2011	Jun. 09, 2011	Dec. 31, 2010	Jun. 09, 2011 Senior Notes 2.95 Percent Due 2016	Jun. 09, 2011 Senior Notes 4.60 Percent Due 2021	Sep. 30, 2011 East Tennessee 5.71 Percent Unsecured Notes	Dec. 31, 2010 East Tennessee 5.71 Percent Unsecured Notes	Oct. 18, 2011 Maximum New Credit Facilities	Oct. 18, 2011 New Credit Facilities	Oct. 18, 2011 New Credit Facilities Letter of Credit	Oct. 18, 2011 New Credit Facilities Letter of Credit Multicurrency
Debt Instrument [Line Items]
Ratio of total debt to adjusted earnings before interest, taxes, depreciation and amortization (EBITDA)	5.0
Ratio of total debt to adjusted earnings before interest, taxes, depreciation and amortization (EBITDA), current	2.6
Maximum borrowing capacity under the revolving credit agreement									$ 700	$ 250	$ 150
Revolving credit agreement Maturity date									2016-10-18
Additional revolving commitments								350
Unsecured senior notes issued		500.0		250.0	250.0
Notes payable						150.0	150.0
Debt instrument, interest rate, stated percentage				2.95%	4.60%	5.71%	5.71%
Debt Instrument Maturity Year				2016	2021
Term borrowings			$ 207.2

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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 3.8	$ 27.4
Receivables, net	32.8	24.8
Other	9.5	6.8
Total current assets	46.1	59.0
Investments and Other Assets
Investments in unconsolidated affiliates	730.1	728.6
Goodwill and other	460.9	477.0
Total investments and other assets	1,191.0	1,205.6
Property, Plant and Equipment
Cost	1,429.9	1,148.3
Less accumulated depreciation and amortization	225.8	206.8
Net property, plant and equipment	1,204.1	941.5
Regulatory Assets and Deferred Debits	19.3	16.4
Total Assets	2,460.5	2,222.5
Current Liabilities
Accounts payable	25.3	13.8
Taxes accrued	7.0	3.9
Note payable-affiliates	28.5	34.0
Current maturities of long-term debt	10.0
Other	20.1	7.9
Total current liabilities	90.9	59.6
Long-term Debt	649.4	655.8
Deferred Credits and Other Liabilities
Deferred income taxes	7.6	9.0
Other	5.8	3.7
Total deferred credits and other liabilities	13.4	12.7
Commitments and Contingencies
Partners' Capital
Common units (96.3 million and 89.2 million units issued and outstanding at September 30, 2011 and December 31, 2010, respectively)	1,662.8	1,458.7
General partner units (2.0 million and 1.8 million units issued and outstanding at September 30, 2011 and December 31, 2010, respectively)	39.3	32.9
Accumulated other comprehensive income	4.7	2.8
Total partners' capital	1,706.8	1,494.4
Total Liabilities and Partners' Capital	$ 2,460.5	$ 2,222.5

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) In Millions	Sep. 30, 2011	Dec. 31, 2010
Common units, units issued	96.3	89.2
Common units, units outstanding	96.3	89.2
General partner units, units issued	2.0	1.8
General partner units, units outstanding	2.0	1.8

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Sale of Common Units - Additional Information (Detail) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Jun. 14, 2011	Dec. 31, 2010
Capital Unit [Line Items]
Common partners units issued	96.3	7.2	89.2
Net proceeds received from issuance of common units	$ 217.9
General partners units issued	2.0	0.1	1.8

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General (Tables)

9 Months Ended

Sep. 30, 2011

Correction and Changes in Presentation Reflected on Condensed Consolidated Statement of Cash Flows

The correction and change in presentation reflected on the Condensed Consolidated Statement of Cash Flows are as follows:

Nine Months Ended September 30, 2010	Proceeds From the Issuance of Long- Term Debt			Payments for the Redemption of Long-Term Debt
	(in millions)
As previously reported	$	2,146.0		$	2,156.0
Less non-cash activity		(2,120.0	)		(2,120.0	)
As corrected		26.0			36.0
Less revolving credit facility activity		(26.0	)		(36.0	)
Long-term debt activity	$	—		$	—

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Document and Entity Information	9 Months Ended
	Sep. 30, 2011
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Trading Symbol	SEP
Entity Registrant Name	SPECTRA ENERGY PARTNERS, LP
Entity Central Index Key	0001394074
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	96,347,567
Entity General Partner, Units Outstanding	1,966,081

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Marketable Securities - Additional Information (Detail) (Investments And Other Assets, USD $) In Millions	Dec. 31, 2010
Investments And Other Assets
Gain (Loss) on Investments [Line Items]
Available for sale securities marketable securities	$ 209.0

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Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2011

Components of Comprehensive Income

Components of comprehensive income are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	(in millions)
Net income	$	43.5		$	38.4		$	130.0		$	110.7
Unrealized mark-to-market net loss on hedges		(0.1	)		(0.5	)		(0.1	)		(2.0	)
Reclassification of cash flow hedges into earnings		0.3			1.1			2.0			3.5
Total comprehensive income	$	43.7		$	39.0		$	131.9		$	112.2

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Changes in Balance of Goodwill (Detail) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011
Goodwill [Line Items]
Beginning Balance	$ 267.9
Increase due to the acquisition of Big Sandy	193.8	[1]
Ending Balance	$ 461.7

[1] See Note 2 for further discussion.

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Comprehensive Income

9 Months Ended

Sep. 30, 2011

Comprehensive Income

6. Comprehensive Income

Components of comprehensive income are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	(in millions)
Net income	$	43.5		$	38.4		$	130.0		$	110.7
Unrealized mark-to-market net loss on hedges		(0.1	)		(0.5	)		(0.1	)		(2.0	)
Reclassification of cash flow hedges into earnings		0.3			1.1			2.0			3.5
Total comprehensive income	$	43.7		$	39.0		$	131.9		$	112.2

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Net Income Per Limited Partner Unit and Cash Distributions (Tables)

9 Months Ended

Sep. 30, 2011

Net Income Per Limited Partner Unit Calculations

The following table presents our net income per limited partner unit calculations.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions, except per unit amounts)
Net income	$	43.5	$	38.4	$	130.0	$	110.7
Less:
General partner’s interest in net income—2%		0.9		0.7		2.6		2.2
General partner’s interest in net income attributable to incentive distribution rights		4.5		2.0		11.9		5.2
Limited partners’ interest in net income	$	38.1	$	35.7	$	115.5	$	103.3
Weighted average limited partner units outstanding—basic and diluted		96.3		80.3		92.0		80.3
Net income per limited partner unit—basic and diluted	$	0.40	$	0.44	$	1.26	$	1.29

Incentive Distribution Rights in Accordance with Partnership Agreement

The general partner holds incentive distribution rights in accordance with the partnership agreement as follows:

	Total Quarterly Distribution	Marginal Percentage Interest in Distributions
	Target Per-Unit Amount	Common and Subordinated Unitholders			General Partner
Minimum Quarterly Distribution	$0.30		98	%		2	%
First Target Distribution	up to $0.345		98	%		2	%
Second Target Distribution	above $0.345 up to $0.375		85	%		15	%
Third Target Distribution	above $0.375 up to $0.45		75	%		25	%
Thereafter	above $0.45		50	%		50	%

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Investments in Unconsolidated Affiliates - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Nov. 30, 2010
Schedule of Equity Method Investments [Line Items]
Operating Activities-Distributions Received From Unconsolidated Affiliates	$ 90.1	$ 59.8
Investing Activities-Distributions Received From Unconsolidated Affiliates	5.4	6.1
Gulfstream
Schedule of Equity Method Investments [Line Items]
Percentage of additional ownership interests acquired			24.50%
Percentage of investments in unconsolidated affiliates which are accounted for using the equity method	49.00%		49.00%
Distributions Received From Unconsolidated Affiliates	56.0	29.4
Operating Activities-Distributions Received From Unconsolidated Affiliates	50.6	23.3
Investing Activities-Distributions Received From Unconsolidated Affiliates	5.4	6.1
Market Hub Partners LLC
Schedule of Equity Method Investments [Line Items]
Percentage of investments in unconsolidated affiliates which are accounted for using the equity method	50.00%
Operating Activities-Distributions Received From Unconsolidated Affiliates	$ 39.5	$ 36.5

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Components of Comprehensive Income (Detail) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net income	$ 43.5	$ 38.4	$ 130.0	$ 110.7
Unrealized mark-to-market net loss on hedges	(0.1)	(0.5)	(0.1)	(2.0)
Reclassification of cash flow hedges into earnings	0.3	1.1	2.0	3.5
Total comprehensive income	$ 43.7	$ 39.0	$ 131.9	$ 112.2

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Business Segments (Tables)

9 Months Ended

Sep. 30, 2011

Business Segment Data

Business Segment Data

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Operating revenues
Gas Transportation and Storage	$	52.9	$	49.0	$	147.1	$	146.9
Other		—		—		—		—
Total operating revenues	$	52.9	$	49.0	$	147.1	$	146.9
Segment EBIT
Gas Transportation and Storage	$	25.9	$	26.0	$	73.1	$	76.2
Other		25.5		16.9		74.6		47.4
Total EBIT		51.4		42.9		147.7		123.6
Interest income		—		—		0.3		0.1
Interest expense		7.7		4.3		17.2		12.2
Earnings before income taxes	$	43.7	$	38.6	$	130.8	$	111.5

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Debt and Credit Facility

9 Months Ended

Sep. 30, 2011

Debt and Credit Facility

11. Debt and Credit Facility

	Expiration Date		Credit Facility Capacity		Outstanding as of September 30, 2011
Credit Facility Summary					Revolving Credit
			(in millions)
Spectra Energy Partners, LP		2012	$	500.0	$	10.0

The credit facility prohibits us from making distributions of Available Cash to unitholders if any default or event of default, as defined in the credit agreement, exists. In addition, the credit facility contains covenants, among others, limiting our ability to make other restricted distributions or dividends on account of the purchase, redemption, retirement, acquisition, cancellation or termination of partnership interests, and is also subject to certain financial covenants.

These financial covenants include a financial leverage ratio. The terms of the credit agreement require us to maintain a ratio of total debt to Adjusted Earnings Before Interest, Taxes, Depreciation and Amortization (EBITDA), as defined in the credit agreement, of 5.0 or less. As of September 30, 2011, the ratio was 2.6. As of September 30, 2011, we were in compliance with the covenants of the credit facility. The credit facility does not contain provisions that trigger an acceleration of indebtedness based solely on the occurrence of a material adverse change in our financial condition or results of operations. Adjusted EBITDA is a non-GAAP measure. Because Adjusted EBITDA excludes some, but not all, items that affect net income and is defined differently by companies in our industry, our definition of Adjusted EBITDA may not be comparable to similarly titled measures of other companies. Adjusted EBITDA should not be considered an alternative to net income, operating income, cash from operations or any other measure of financial performance or liquidity presented in accordance with GAAP.

On October 18, 2011, we entered into a $700 million revolving credit agreement (Credit Agreement) which will mature on October 18, 2016 and may be extended for up to two additional one-year periods at our request. The Credit Agreement contains a sublimit of $250 million for issuances of letters of credit, $150 million of which may be denominated in alternative currencies. The Credit Agreement also provides for up to $350 million in additional revolving commitments, which may consist of incremental term loans that, at our election, automatically increase the aggregate amount of the revolving commitments upon any prepayment thereof.

Unsecured Senior Notes. On June 9, 2011, we issued $500.0 million aggregate principal amount of unsecured senior notes, including $250.0 million 2.95% senior notes due in 2016 and $250.0 million 4.60% senior notes due in 2021. Interest on the notes will be payable semi-annually in arrears on June 15 and December 15 of each year, commencing on December 15, 2011. Net proceeds from this offering were used to repay all of the outstanding borrowings under our term loan, a significant portion of the funds borrowed under the credit facility, with the remaining balance used for general partnership purposes.

These notes are governed by an indenture, dated as of June 9, 2011, between us and Wells Fargo Bank, National Association, the trustee, as supplemented. The aggregate principal amount of debt securities which may be issued under this indenture is unlimited. The debt securities may be issued from time to time in one or more additional series in fully registered forms. The indenture contains covenants that limit our ability to create liens on principal properties, engage in sale and leaseback transactions, merge or consolidate with another entity or sell, lease or transfer substantially all of our properties or assets to another entity.

We may redeem all or some of these notes, in whole or in part, at any time prior to the date that is one month prior to the maturity date of the 2016 notes or three months prior to the maturity date of the 2021 notes, at stated redemption prices. The notes rank equally in right of payment with all of our existing and future senior indebtedness, effectively junior in right of payment to our existing and future secured indebtedness to the extent of the value of the collateral securing that indebtedness and senior to any subordinated debt that we may incur.

Term Loan. As of December 31, 2010, the term loan had a balance of $207.2 million and was secured by qualifying investment-grade securities in an amount equal to or greater than the outstanding principal amount of the loan. The term loan was repaid in June 2011 with proceeds from the issuance of the unsecured senior notes.

East Tennessee Notes Payable. In addition to the credit facility and unsecured senior notes, long-term debt includes East Tennessee’s 5.71% unsecured notes payable totaling $150.0 million as of both September 30, 2011 and December 31, 2010. East Tennessee’s debt agreement contains financial covenants which limit the amount of debt that can be outstanding as a percentage of total capital. Failure to maintain the covenants could require East Tennessee to immediately pay down the outstanding balance. As of September 30, 2011, East Tennessee was in compliance with those covenants. In addition, the debt agreement allows for acceleration of payments or termination of the agreements due to nonpayment, or to the acceleration of other significant indebtedness. The debt agreement does not contain provisions that trigger an acceleration of indebtedness based solely on the occurrence of a material adverse change in our financial condition or results of operations.

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Acquisitions

9 Months Ended

Sep. 30, 2011

Acquisitions

2. Acquisitions

Big Sandy. On July 1, 2011, we completed the acquisition of Big Sandy from EQT for approximately $390 million in cash. Big Sandy’s primary asset is a 68-mile Federal Energy Regulatory Commission (FERC)-regulated natural gas pipeline system in eastern Kentucky with capacity of 171,000 dekatherms per day. The Big Sandy natural gas pipeline system connects Appalachian and Huron Shale natural gas supplies to markets in the mid-Atlantic and northeast portions of the United States. EQT will be the main shipper on the pipeline, with over 80% of the pipeline’s capacity. With 100% fee-based revenues and a weighted average contract life of 15 years, the acquisition of Big Sandy strengthens our portfolio of fee-based natural gas assets and is consistent with our strategy of growth through third-party acquisitions.

The assets and liabilities of Big Sandy were recorded at their respective fair values as of the purchase date and the results of operations were included in the Condensed Consolidated Financial Statements beginning as of the effective date of the acquisition. Since Big Sandy records assets and liabilities resulting from the rate making process, the fair values of the individual assets and liabilities are considered to approximate their carrying values. Big Sandy is part of the Gas Transportation and Storage segment.

The following table summarizes the preliminary fair values of the assets and liabilities acquired as of July 1, 2011. Subsequent adjustments may be recorded upon the completion of the valuation and the final determination of the purchase price allocation.

	Purchase Price Allocation
	(in millions)
Cash purchase price	$	390.0
Working capital adjustments		(0.4	)
Total purchase price		389.6
Property, plant and equipment		196.2
Current liabilities		(0.4	)
Total assets acquired/liabilities assumed	$	195.8
Goodwill	$	193.8

The purchase price is greater than the sum of fair values of the net assets acquired, resulting in goodwill as noted above. The goodwill reflects the value of strong cash flows from stable long-term contracts. Pro forma results of operations reflecting the acquisition of Big Sandy as if the acquisition had occurred as of the beginning of the periods presented in this report do not materially differ from actual reported results.

Gulfstream Natural Gas System, L.L.C. (Gulfstream). On November 30, 2010, we acquired an additional 24.5% interest in Gulfstream from a subsidiary of Spectra Energy Corp (Spectra Energy) for approximately $330.0 million, consisting of approximately $66.0 million in newly issued units, the assumption of $7.4 million in debt owed to Spectra Energy Capital LLC, a subsidiary of Spectra Energy and $256.6 million in cash, which was funded through borrowings under our credit facility. The acquisition increased our interest in Gulfstream to 49%.

The Gulfstream acquisition represented a transaction between entities under common control, but did not represent a change in reporting entity as Gulfstream is accounted for as an equity method investment. Accordingly, the Condensed Consolidated Financial Statements and related information presented herein include the results of the acquisition of additional interest in Gulfstream as of the date of the acquisition.

The additional 24.5% interest in Gulfstream was recorded at the historical book value of Spectra Energy of $179.9 million, including $2.5 million of additional equity interest in Gulfstream’s other comprehensive income. The $150.1 million excess purchase price over the book value of net assets acquired was recorded as a reduction to Partners’ Capital, and the $66.0 million of common and general partner units issued were recorded as increases to Partners’ Capital.

Following the acquisition of Gulfstream, we issued 6.9 million of our common units to the public, representing limited partner interests. The net proceeds from this offering were approximately $221.0 million, including our general partner’s proportionate unit purchase after deducting the underwriting fees. The proceeds were used to repay the $7.4 million loan assumed in the Gulfstream acquisition. The remaining $209.0 million in net proceeds (other than proceeds from our general partner) were used to purchase qualifying investment grade securities, which were assigned as collateral to secure the new term loan of an approximately equal principal amount. The proceeds of the term loan were used to repay revolving borrowings, which were incurred to fund a portion of the consideration of the Gulfstream acquisition. The approximately $4.6 million in proceeds from our general partner’s proportionate unit purchase were used for general partnership purposes.

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Summary of Preliminary Fair Values of Assets and Liabilities Acquired (Detail) (Big Sandy, USD $) In Millions	Jul. 01, 2011
Big Sandy
Purchase Price Allocation
Cash purchase price	$ 390.0
Working capital adjustments	(0.4)
Total purchase price	389.6
Property, plant and equipment	196.2
Current liabilities	(0.4)
Total assets acquired/liabilities assumed	195.8
Goodwill	$ 193.8

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Investments in Unconsolidated Affiliates

9 Months Ended

Sep. 30, 2011

Investments in Unconsolidated Affiliates

8. Investments in Unconsolidated Affiliates

During the fourth quarter of 2010, we purchased an additional 24.5% interest in Gulfstream from a subsidiary of Spectra Energy, for a total interest of 49%. See Note 2 for further discussion. The equity earnings related to the additional 24.5% interest are included in our results from the date of the acquisition.

As of September 30, 2011, our investments in unconsolidated affiliates consist of a 49% interest in Gulfstream and a 50% interest in Market Hub, both of which are accounted for using the equity method.

For the nine months ended September 30, 2011, we received total distributions of $56.0 million from Gulfstream, of which $50.6 million were included in Cash Flows From Operating Activities—Distributions Received From Unconsolidated Affiliates and $5.4 million were included in Cash Flows From Investing Activities—Distributions Received From Unconsolidated Affiliates. For the nine months ended September 30, 2010, we received total distributions of $29.4 million, of which $23.3 million were included in Cash Flows From Operating Activities—Distributions Received From Unconsolidated Affiliates and $6.1 million were included in Cash Flows From Investing Activities—Distributions Received From Unconsolidated Affiliates.

We received distributions from Market Hub of $39.5 million during the nine months ended September 30, 2011 and $36.5 million during the same period in 2010, all of which were included in Cash Flows From Operating Activities—Distributions Received From Unconsolidated Affiliates.

Investments in Unconsolidated Affiliates

	September 30, 2011		December 31, 2010
	(in millions)
Gulfstream	$	363.9	$	368.1
Market Hub		366.2		360.5
Total	$	730.1	$	728.6

Equity in Earnings of Unconsolidated Affiliates

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Gulfstream	$	16.2	$	8.2	$	48.4	$	23.7
Market Hub		11.1		10.2		33.5		30.3
Total	$	27.3	$	18.4	$	81.9	$	54.0

Summarized Financial Information of Unconsolidated Affiliates

(Presented at 100%)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Gulfstream
Operating revenues	$	69.7	$	69.5	$	205.0	$	203.5
Operating expenses		18.7		18.4		53.8		54.8
Operating income		51.0		51.1		151.2		148.7
Net income		33.0		33.8		98.8		96.9
Market Hub
Operating revenues	$	31.0	$	29.2	$	92.1	$	88.1
Operating expenses		8.6		9.0		24.9		28.1
Operating income		22.4		20.2		67.2		60.0
Net income		22.3		20.3		67.1		60.6

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2011

Commitments and Contingencies

13. Commitments and Contingencies

Environmental. We are subject to various federal, state and local laws and regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. We believe there are no matters outstanding that upon resolution will have a material effect on our consolidated results of operations, financial position or cash flows.

Litigation. We are involved in legal, tax and regulatory proceedings in various forums arising in the ordinary course of business, including matters regarding contracts and payment claims, some of which may involve substantial monetary amounts. We have insurance coverage for certain of these losses should they be incurred. We believe that the final disposition of these proceedings will not have a material effect on our consolidated results of operations, financial position or cash flows.

Legal costs related to the defense of loss contingencies are expensed as incurred. We had no material reserves recorded as of September 30, 2011 or December 31, 2010 related to litigation.

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Goodwill

9 Months Ended

Sep. 30, 2011

Goodwill

9. Goodwill

We completed our annual goodwill impairment test as of April 1, 2011 and no impairments were identified. All of our goodwill is in our Gas Transportation and Storage segment.

We primarily use a discounted cash flow analysis to determine fair value for our reporting unit. Key assumptions in the determination of fair value include the use of an appropriate discount rate and estimated future cash flows. In estimating cash flows, we incorporate expected long-term growth rates in key markets served by our operations, regulatory stability, and the ability to renew contracts, as well as other factors that affect our revenue, expense and capital expenditure projections.

Changes in the balance of goodwill since December 31, 2010 follow (in millions):

Balance at December 31, 2010	$	267.9
Increase due to the acquisition of Big Sandy (a)		193.8
Balance at September 30, 2011	$	461.7

(a) See Note 2 for further discussion.

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General - Additional Information (Detail) (USD $) In Millions	9 Months Ended		9 Months Ended
	Sep. 30, 2011	Jul. 01, 2011 Big Sandy	Sep. 30, 2011 Maximum
Business Acquisition [Line Items]
Cash purchase price		$ 390.0
Revolving credit facility, description	We have elected to present cash borrowings and repayments under our revolving bank credit facility on a net basis for all periods presented as Net Decrease in Revolving Credit Facility Borrowings. As these periodic borrowings and repayments are generally of significant amounts and had terms of 90 days or less
Revolving credit facility, terms			90 days

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Net Income Per Limited Partner Unit and Cash Distributions

9 Months Ended

Sep. 30, 2011

Net Income Per Limited Partner Unit and Cash Distributions

7. Net Income Per Limited Partner Unit and Cash Distributions

The following table presents our net income per limited partner unit calculations.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions, except per unit amounts)
Net income	$	43.5	$	38.4	$	130.0	$	110.7
Less:
General partner’s interest in net income—2%		0.9		0.7		2.6		2.2
General partner’s interest in net income attributable to incentive distribution rights		4.5		2.0		11.9		5.2
Limited partners’ interest in net income	$	38.1	$	35.7	$	115.5	$	103.3
Weighted average limited partner units outstanding—basic and diluted		96.3		80.3		92.0		80.3
Net income per limited partner unit—basic and diluted	$	0.40	$	0.44	$	1.26	$	1.29

The partnership agreement requires that, within 45 days after the end of each quarter, we distribute all of our Available Cash, as defined, to unitholders of record on the applicable record date.

Available Cash. Available Cash, for any quarter, consists of all cash on hand at the end of that quarter:

• less the amount of cash reserves established by the general partner to:

• provide for the proper conduct of business,

• comply with applicable law, any debt instrument or other agreement, or

• provide funds for distributions to the unitholders and to the general partner for any one or more of the next four quarters,

• plus, if the general partner so determines, all or a portion of cash on hand on the date of determination of Available Cash for the quarter.

Incentive Distribution Rights. The general partner holds incentive distribution rights in accordance with the partnership agreement as follows:

	Total Quarterly Distribution	Marginal Percentage Interest in Distributions
	Target Per-Unit Amount	Common and Subordinated Unitholders			General Partner
Minimum Quarterly Distribution	$0.30		98	%		2	%
First Target Distribution	up to $0.345		98	%		2	%
Second Target Distribution	above $0.345 up to $0.375		85	%		15	%
Third Target Distribution	above $0.375 up to $0.45		75	%		25	%
Thereafter	above $0.45		50	%		50	%

To the extent these incentive distributions are made to our general partner, there will be more Available Cash proportionately allocated to our general partner than to holders of common units. Our distribution paid in August 2011 was $0.465 per unit.

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Risk Management and Hedging Activities - Additional Information (Detail) (Spectra Energy Partners Third Party Pay Fixed Receive Floating, USD $) In Millions	1 Months Ended
	Sep. 30, 2011
Spectra Energy Partners Third Party Pay Fixed Receive Floating
Derivative [Line Items]
Settlement of interest rate swap agreement	$ 40.0

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CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (USD $) In Millions	Total	Limited Partners Common	Limited Partners Subordinated	General Partner	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2009	$ 1,348.5	$ 1,015.0	$ 308.5	$ 27.2	$ (2.2)
Net income	110.7	85.0	18.3	7.4
Unrealized mark-to-market net loss on hedges	(2.0)				(2.0)
Reclassification of cash flow hedges into earnings	3.5				3.5
Attributed deferred tax benefit	0.5	0.4	0.1
Distributions to partners	(107.8)	(74.0)	(27.2)	(6.6)
Contributions from general partner	1.4			1.4
Conversion of subordinated units to common units		299.7	(299.7)
Other	0.2	0.2
Ending Balance at Sep. 30, 2010	1,355.0	1,326.3		29.4	(0.7)
Beginning Balance at Dec. 31, 2010	1,494.4	1,458.7		32.9	2.8
Net income	130.0	115.5		14.5
Unrealized mark-to-market net loss on hedges	(0.1)				(0.1)
Reclassification of cash flow hedges into earnings	2.0				2.0
Issuance of units	217.9	213.4		4.5
Attributed deferred tax benefit	0.8	0.8
Distributions to partners	(138.5)	(125.9)		(12.6)
Other	0.3	0.3
Ending Balance at Sep. 30, 2011	$ 1,706.8	$ 1,662.8		$ 39.3	$ 4.7

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Business Segments

9 Months Ended

Sep. 30, 2011

Business Segments

3. Business Segments

Our Gas Transportation and Storage segment aligns our operations with the chief operating decision maker’s view of the business. This business segment is considered to be our sole reportable segment.

The Gas Transportation and Storage segment provides interstate transportation, storage and gathering services of natural gas, and the storage and redelivery of liquefied natural gas for customers in the southeastern quadrant of the United States. Substantially all of our operations are subject to the FERC and the Department of Transportation’s (DOT) rules and regulations. This segment includes East Tennessee Natural Gas, LLC (East Tennessee), Ozark Gas Transmission, L.L.C. (Ozark Gas Transmission) and Ozark Gas Gathering, L.L.C. (Ozark Gas Gathering) (collectively, hereafter referred to as “Ozark”), Saltville Gas Storage, L.L.C. (Saltville), and Big Sandy.

The remainder of our operations is presented as “Other.” While it is not considered a business segment, Other mainly includes our equity investments in Gulfstream and Market Hub Partners Holding (Market Hub) and unallocated corporate costs.

Gulfstream provides interstate natural gas pipeline transportation from Pascagoula, Mississippi and Mobile, Alabama across the Gulf of Mexico into Florida for customers in central and southern Florida. Gulfstream’s operations are subject to the rules and regulations of the FERC and DOT.

Market Hub owns and operates two natural gas storage facilities, Moss Bluff and Egan, which are located in southeast Texas and south central Louisiana, respectively. Market Hub’s operations are subject to the rules and regulations of DOT. Moss Bluff is also subject to the rules and regulations of the Texas Railroad Commission, while Egan is also subject to the rules and regulations of the FERC.

Management evaluates segment performance based on earnings before interest and taxes (EBIT) from continuing operations. On a segment basis, EBIT represents all profits from continuing operations (both operating and non-operating) before deducting interest and income taxes.

Business Segment Data

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Operating revenues
Gas Transportation and Storage	$	52.9	$	49.0	$	147.1	$	146.9
Other		—		—		—		—
Total operating revenues	$	52.9	$	49.0	$	147.1	$	146.9
Segment EBIT
Gas Transportation and Storage	$	25.9	$	26.0	$	73.1	$	76.2
Other		25.5		16.9		74.6		47.4
Total EBIT		51.4		42.9		147.7		123.6
Interest income		—		—		0.3		0.1
Interest expense		7.7		4.3		17.2		12.2
Earnings before income taxes	$	43.7	$	38.6	$	130.8	$	111.5

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Net Income Per Limited Partner Unit Calculations (Parenthetical) (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
General partner's interest in income, ownership interest percentage	2.00%	2.00%	2.00%	2.00%

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Hierarchy Levels, Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following table presents, for each of the fair value hierarchy levels, assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2010.

Description	Condensed Consolidated Balance Sheet Caption	December 31, 2010
		Total		Level 1		Level 2		Level 3
		(in millions)
Corporate debt securities	Other investments	$	209.0	$	—	$	209.0	$	—
Total Assets		$	209.0	$	—	$	209.0	$	—
Interest rate swap liabilities	Current liabilities—other	$	2.0	$	—	$	2.0	$	—
Interest rate swap liabilities	Deferred credits and other liabilities—other		0.7		—		0.7		—
Total Liabilities		$	2.7	$	—	$	2.7	$	—

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Fair Value Hierarchy Levels, Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Millions	Dec. 31, 2010
Debt Instrument [Line Items]
Fair Value Assets	$ 209.0
Fair Value Liabilities	2.7
Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Fair Value Assets	209.0
Fair Value Liabilities	2.7
Fair Value, Inputs, Level 2 | Interest Rate Swap | Current Liabilities-Other
Debt Instrument [Line Items]
Fair Value Liabilities	2.0
Fair Value, Inputs, Level 2 | Interest Rate Swap | Deferred Credits And Other Liabilities-Other
Debt Instrument [Line Items]
Fair Value Liabilities	0.7
Fair Value, Inputs, Level 2 | Corporate Debt Securities | Other Investments
Debt Instrument [Line Items]
Fair Value Assets	209.0
Interest Rate Swap | Current Liabilities-Other
Debt Instrument [Line Items]
Fair Value Liabilities	2.0
Interest Rate Swap | Deferred Credits And Other Liabilities-Other
Debt Instrument [Line Items]
Fair Value Liabilities	0.7
Corporate Debt Securities | Other Investments
Debt Instrument [Line Items]
Fair Value Assets	$ 209.0

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Regulatory Matters

9 Months Ended

Sep. 30, 2011

Regulatory Matters

4. Regulatory Matters

Ozark Gas Transmission. As a result of a FERC rate proceeding, Ozark Gas Transmission filed a Cost and Revenue Study in early 2011. A settlement agreement reached with parties involved in the proceeding was approved by the FERC with an effective date of October 1, 2011. The effects of this matter will not have a material impact on our future consolidated results of operations, financial position or cash flows.

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Incentive Distribution Rights in Accordance with Partnership Agreement (Detail) (USD $)	9 Months Ended
	Sep. 30, 2011
Minimum Quarterly Distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Total Quarterly Distribution Target Per-Unit Amount	$ 0.30
Marginal Percentage Interest in Distributions Common Unit holders	98.00%
Marginal Percentage Interest in Distributions General Partners Unit holders	2.00%
Maximum | First Target Distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Total Quarterly Distribution Target Per-Unit Amount	$ 0.345
First Target Distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions Common Unit holders	98.00%
Marginal Percentage Interest in Distributions General Partners Unit holders	2.00%
Maximum | Second Target Distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Total Quarterly Distribution Target Per-Unit Amount	$ 0.375
Second Target Distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions Common Unit holders	85.00%
Marginal Percentage Interest in Distributions General Partners Unit holders	15.00%
Second Target Distribution | Above
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Total Quarterly Distribution Target Per-Unit Amount	$ 0.345
Maximum | Third Target Distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Total Quarterly Distribution Target Per-Unit Amount	$ 0.45
Third Target Distribution
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions Common Unit holders	75.00%
Marginal Percentage Interest in Distributions General Partners Unit holders	25.00%
Third Target Distribution | Above
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Total Quarterly Distribution Target Per-Unit Amount	$ 0.375
Target Distribution Thereafter
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Marginal Percentage Interest in Distributions Common Unit holders	50.00%
Marginal Percentage Interest in Distributions General Partners Unit holders	50.00%
Target Distribution Thereafter | Above
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Total Quarterly Distribution Target Per-Unit Amount	$ 0.45

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Investments in Unconsolidated Affiliates (Tables)

9 Months Ended

Sep. 30, 2011

Investments in Unconsolidated Affiliates

Investments in Unconsolidated Affiliates

	September 30, 2011		December 31, 2010
	(in millions)
Gulfstream	$	363.9	$	368.1
Market Hub		366.2		360.5
Total	$	730.1	$	728.6

Equity in Earnings of Unconsolidated Affiliates

Equity in Earnings of Unconsolidated Affiliates

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Gulfstream	$	16.2	$	8.2	$	48.4	$	23.7
Market Hub		11.1		10.2		33.5		30.3
Total	$	27.3	$	18.4	$	81.9	$	54.0

Summarized Financial Information of Unconsolidated Affiliates Presented at 100 Percent

Summarized Financial Information of Unconsolidated Affiliates

(Presented at 100%)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(in millions)
Gulfstream
Operating revenues	$	69.7	$	69.5	$	205.0	$	203.5
Operating expenses		18.7		18.4		53.8		54.8
Operating income		51.0		51.1		151.2		148.7
Net income		33.0		33.8		98.8		96.9
Market Hub
Operating revenues	$	31.0	$	29.2	$	92.1	$	88.1
Operating expenses		8.6		9.0		24.9		28.1
Operating income		22.4		20.2		67.2		60.0
Net income		22.3		20.3		67.1		60.6

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Correction and Changes in Presentation Reflected on Condensed Consolidated Statement of Cash Flows (Detail) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010 As previously reported	Sep. 30, 2010 Non-cash activity	Sep. 30, 2010 As corrected	Sep. 30, 2010 Revolving Credit Facility
Proceeds From the Issuance of Long- Term Debt	$ 499.4	$ 2,146.0	$ (2,120.0)	$ 26.0	$ (26.0)
Payments for the Redemption of Long-Term Debt	$ 207.2	$ 2,156.0	$ (2,120.0)	$ 36.0	$ (36.0)

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Net Income Per Limited Partner Unit and Cash Distributions - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended
	Aug. 31, 2011	Sep. 30, 2011
Earnings Per Share Disclosure [Line Items]
Period after the end of each quarter for the distribution of Available Cash to unitholders on the applicable record date		45 days
Distributions paid to unit holders	$ 0.465

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Debt and Credit Facility (Tables)

9 Months Ended

Sep. 30, 2011

Credit Facility Summary

Debt and Credit Facility

	Expiration Date		Credit Facility Capacity		Outstanding as of September 30, 2011
Credit Facility Summary					Revolving Credit
			(in millions)
Spectra Energy Partners, LP		2012	$	500.0	$	10.0

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Fair Value Measurements

9 Months Ended

Sep. 30, 2011

Fair Value Measurements

12. Fair Value Measurements

As of September 30, 2011, there were no assets and liabilities measured at fair value on a recurring basis.

The following table presents, for each of the fair value hierarchy levels, assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2010.

Description	Condensed Consolidated Balance Sheet Caption	December 31, 2010
		Total		Level 1		Level 2		Level 3
		(in millions)
Corporate debt securities	Other investments	$	209.0	$	—	$	209.0	$	—
Total Assets		$	209.0	$	—	$	209.0	$	—
Interest rate swap liabilities	Current liabilities—other	$	2.0	$	—	$	2.0	$	—
Interest rate swap liabilities	Deferred credits and other liabilities—other		0.7		—		0.7		—
Total Liabilities		$	2.7	$	—	$	2.7	$	—

Level 1

Level 1 valuations represent quoted unadjusted prices for identical instruments in active markets.

Level 2 Valuation Techniques

Fair values of our financial instruments that are actively traded in the secondary market, primarily corporate debt securities, are determined based on market-based prices. These valuations may include inputs such as quoted market prices of the exact or similar instruments or alternative pricing sources that may include models or matrix pricing tools, with reasonable levels of price transparency.

For interest rate swaps, we utilize data obtained from multiple sources for the determination of fair value. Both the future cash flows for the fixed-leg and floating-leg of our swaps are discounted to present value. In addition, credit default swap rates are used to develop the adjustments for credit risk embedded in our positions. We believe that since some of the inputs and assumptions for the calculations of fair value are derived from observable market data, a Level 2 classification is appropriate.

Financial Instruments There was no material change in fair value from December 31, 2010 for financial instruments recorded and carried at book value. Judgment is required in interpreting market data to develop the estimates of fair value.

During the 2011 and 2010 periods, there were no adjustments to assets and liabilities measured at fair value on a nonrecurring basis.

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Income Taxes

9 Months Ended

Sep. 30, 2011

Income Taxes

5. Income Taxes

As a result of our master limited partnership structure, we are not subject to federal income tax, but certain portions of our operations are subject to Tennessee state income tax. We recognized a $3 million increase in uncertain tax positions during the nine months ended September 30, 2011. Although uncertain, no material increases or decreases in uncertain tax benefits are expected to occur prior to September 30, 2012. Market Hub is liable for Texas income (margin) tax under a tax sharing agreement with Spectra Energy.

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Sale of Common Units

9 Months Ended

Sep. 30, 2011

Sale of Common Units

15. Sale of Common Units

On June 14, 2011, we issued 7.2 million common units to the public representing limited partner interests. The net proceeds from this offering were $217.9 million, including our general partner’s proportionate unit purchase of 0.1 million general partner units after deducting the underwriting discount and offering expenses. The net proceeds from this issuance were used to fund a portion of the purchase price of the Big Sandy acquisition, see Note 2 for additional information.

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Net Income Per Limited Partner Unit Calculations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011 PartnershipUnit	Sep. 30, 2010 PartnershipUnit	Sep. 30, 2011 PartnershipUnit	Sep. 30, 2010 PartnershipUnit
Net income	$ 43.5	$ 38.4	$ 130.0	$ 110.7
Limited partners' interest in net income	38.1	35.7	115.5	103.3
Weighted average limited partner units outstanding-basic and diluted	96,300,000	80,300,000	92,000,000	80,300,000
Net income per limited partner unit-basic and diluted	0.40	0.44	1.26	1.29
Less: General partner's interest in net income	5.4	2.7	14.5	7.4
Partnership Interest
Less: General partner's interest in net income	0.9	0.7	2.6	2.2
Incentive Distribution Rights
Less: General partner's interest in net income	$ 4.5	$ 2.0	$ 11.9	$ 5.2

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Goodwill (Tables)

9 Months Ended

Sep. 30, 2011

Changes in Balance of Goodwill

Changes in the balance of goodwill since December 31, 2010 follow (in millions):

Balance at December 31, 2010	$	267.9
Increase due to the acquisition of Big Sandy (a)		193.8
Balance at September 30, 2011	$	461.7

(a) See Note 2 for further discussion.

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 130.0	$ 110.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24.9	22.2
Deferred income tax expense	0.7	0.4
Equity in earnings of unconsolidated affiliates	(81.9)	(54.0)
Distributions received from unconsolidated affiliates	90.1	59.8
Other	6.7	5.4
Net cash provided by operating activities	170.5	144.5
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(78.0)	(19.7)
Investment expenditures	(15.5)	(18.8)
Acquisition of Big Sandy	(389.6)
Distributions received from unconsolidated affiliates	5.4	6.1
Purchases of available-for-sale securities	(891.6)
Proceeds from sales and maturities of available-for-sale securities	1,091.1
Other	10.6
Net cash used in investing activities	(267.6)	(32.4)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of long-term debt	499.4
Payments for the redemption of long-term debt	(207.2)
Net decrease in revolving credit facility borrowings	(288.6)	(10.0)
Proceeds from issuance of units	217.9
Proceeds from notes payable-affiliates	14.0	16.0
Payments on notes payable-affiliates	(19.5)	(10.5)
Distributions to partners	(138.5)	(107.8)
Other	(4.0)	(1.6)
Net cash provided by (used in) financing activities	73.5	(113.9)
Net decrease in cash and cash equivalents	(23.6)	(1.8)
Cash and cash equivalents at beginning of period	27.4	12.2
Cash and cash equivalents at end of period	3.8	10.4
Supplemental Disclosures
Property, plant and equipment noncash accruals	10.7	0.7
Deemed contributions from General Partner for services provided		$ 1.4

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New Accounting Pronouncement

9 Months Ended

Sep. 30, 2011

New Accounting Pronouncement

16. New Accounting Pronouncement

There were no significant accounting pronouncements adopted during the nine months ended September 30, 2011 that had a material impact on our consolidated results of operations, financial position or cash flows.

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Investments in Unconsolidated Affiliates (Detail) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 730.1	$ 728.6
Gulfstream
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	363.9	368.1
Market Hub Partners LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 366.2	$ 360.5

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Acquisitions (Tables)

9 Months Ended

Sep. 30, 2011

Preliminary Fair Values of Assets and Liabilities Acquired

The following table summarizes the preliminary fair values of the assets and liabilities acquired as of July 1, 2011. Subsequent adjustments may be recorded upon the completion of the valuation and the final determination of the purchase price allocation.

	Purchase Price Allocation
	(in millions)
Cash purchase price	$	390.0
Working capital adjustments		(0.4	)
Total purchase price		389.6
Property, plant and equipment		196.2
Current liabilities		(0.4	)
Total assets acquired/liabilities assumed	$	195.8
Goodwill	$	193.8

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General

9 Months Ended

Sep. 30, 2011

General

1. General

The terms “we,” “our,” “us” and “Spectra Energy Partners” as used in this report refer collectively to Spectra Energy Partners, LP and its subsidiaries unless the context suggests otherwise. These terms are used for convenience only and are not intended as a precise description of any separate legal entity within Spectra Energy Partners.

Nature of Operations. Spectra Energy Partners, LP, through its subsidiaries and equity affiliates is engaged in the transportation and gathering of natural gas through interstate pipeline systems that are located in the southeastern quadrant of the United States, and the storage of natural gas in underground facilities that are located in southeast Texas, south central Louisiana and southwest Virginia.

Acquisitions. On July 1, 2011, we completed the acquisition of Big Sandy Pipeline, LLC (Big Sandy) from EQT Corporation (EQT) for approximately $390 million in cash. The Big Sandy natural gas pipeline system connects Appalachian and Huron Shale natural gas supplies to markets in the mid-Atlantic and northeast portions of the United States. See Note 2 for further information on this acquisition.

Basis of Presentation. The Condensed Consolidated Financial Statements include our accounts and the accounts of our majority-owned subsidiaries where we have control. These interim financial statements should be read in conjunction with the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2010, and reflect all normal recurring adjustments that are, in our opinion, necessary to fairly present our results of operations and financial position. Amounts reported in the Condensed Consolidated Statements of Operations are not necessarily indicative of amounts expected for the respective annual periods.

During the third quarter of 2011, we identified errors in our previously issued Condensed Consolidated Statements of Cash Flows related to the accounting for rollovers of outstanding borrowings under our revolving bank credit facility. These non-cash rollovers were previously accounted for as cash activities and resulted in the overstatement of both Proceeds from Issuance of Long-Term Debt and Payments for the Redemption of Long-Term Debt for the nine months ended September 30, 2010. Cash and Cash Equivalents and Net Cash Provided By (Used In) Financing Activities as previously reported are not affected by the errors. We evaluated materiality from both a qualitative and a quantitative perspective and concluded that the errors are immaterial to our previously issued Condensed Consolidated Statements of Cash Flows.

In addition to making this correction, effective with the third quarter of 2011, we have elected to present cash borrowings and repayments under our revolving bank credit facility on a net basis for all periods presented as Net Decrease in Revolving Credit Facility Borrowings. As these periodic borrowings and repayments are generally of significant amounts and had terms of 90 days or less, we believe our current presentation provides users with more meaningful and relevant information about our long-term debt financing activities.

The correction and change in presentation reflected on the Condensed Consolidated Statement of Cash Flows are as follows:

Nine Months Ended September 30, 2010	Proceeds From the Issuance of Long- Term Debt			Payments for the Redemption of Long-Term Debt
	(in millions)
As previously reported	$	2,146.0		$	2,156.0
Less non-cash activity		(2,120.0	)		(2,120.0	)
As corrected		26.0			36.0
Less revolving credit facility activity		(26.0	)		(36.0	)
Long-term debt activity	$	—		$	—

Use of Estimates. To conform with generally accepted accounting principles (GAAP) in the United States, we make estimates and assumptions that affect the amounts reported in the Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements. Although these estimates are based on our best available knowledge at the time, actual results could differ.

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Marketable Securities

9 Months Ended

Sep. 30, 2011

Marketable Securities

10. Marketable Securities

In the fourth quarter of 2010, we invested a portion of the proceeds from the equity issuance following the Gulfstream acquisition in commercial paper. These investments which totaled $209.0 million as of December 31, 2010, were pledged as collateral against the term loan and are classified as Other Investments on the Condensed Consolidated Balance Sheet. See Note 2 for additional information on the acquisition of additional interest in Gulfstream. The estimated fair value of long-term investments classified as available-for-sale was $209.0 million at December 31, 2010. There were no gross unrealized holding gains or losses as of December 31, 2010.

In June 2011, the term loan was repaid using proceeds from the issuance of unsecured senior notes, and the related investments were liquidated. See Note 11 for additional information on the repayment of the term loan.

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Acquisitions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended		9 Months Ended		9 Months Ended
	Jul. 01, 2011 Big Sandy mi DTH	Jul. 01, 2011 EQT Year	Sep. 30, 2011 Gulfstream	Nov. 30, 2010 Gulfstream	Sep. 30, 2011 Gulfstream Spectra Energy Corp
Business Acquisition [Line Items]
Percentage of additional ownership interests acquired				24.50%
Purchase price	$ 389.6			$ 330.0
Acquisition of additional interest units issued				66.0
Acquisition of additional interest liabilities assumed				7.4
Cash purchase price	390.0			256.6
Percentage of ownership interests				49.00%
Length of pipeline	68
Capacity per day	171,000
Percentage of pipeline capacity to be shipped by EQT		80.00%
Percentage of fee based revenues		100.00%
Transportation agreement with EQT (in years)		15
Book value of net assets acquired					179.9
Additional equity interest in Gulfstream's other comprehensive income					2.5
Reduction to Partners' Capital					150.1
Common units issued to the public following the acquisition of Gulfstream			6.9
Net proceeds from public offering			221.0
Proceeds used to repay loan assumed in the Gulfstream acquisition			7.4
Proceeds used to purchase qualifying investment grade securities			209.0
Proceeds from general partner's proportionate unit purchase used for general partnership purposes			$ 4.6

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Risk Management and Hedging Activities

9 Months Ended

Sep. 30, 2011

Risk Management and Hedging Activities

14. Risk Management and Hedging Activities

We are exposed to the impact of changes in interest rates as a result of our issuance of variable and fixed-rate debt. We manage our interest rate exposure by limiting our variable-rate exposures and by monitoring the effects of market changes in interest rates.

We also use “pay fixed—receive floating” interest rate swaps to mitigate our exposure to variable interest rates on loans outstanding under our revolving credit facility. In September 2011, we settled our remaining floating-to-fixed interest rate swaps on $40.0 million of loans outstanding under the revolving credit facility in conjunction with the pay down of our credit facility. As of September 30, 2011, we did not have any derivatives outstanding.

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011 PartnershipUnit	Sep. 30, 2010 PartnershipUnit	Sep. 30, 2011 PartnershipUnit	Sep. 30, 2010 PartnershipUnit
Operating Revenues
Transportation of natural gas	$ 47.9	$ 42.1	$ 129.9	$ 125.5
Storage of natural gas and other	5.0	6.9	17.2	21.4
Total operating revenues	52.9	49.0	147.1	146.9
Operating Expenses
Operating, maintenance and other	17.2	16.5	50.3	49.5
Depreciation and amortization	9.7	7.4	24.9	22.2
Property and other taxes	2.8	0.8	8.3	6.0
Total operating expenses	29.7	24.7	83.5	77.7
Operating Income	23.2	24.3	63.6	69.2
Other Income and Expenses
Equity in Earnings of Unconsolidated Affiliates	27.3	18.4	81.9	54.0
Other income and expenses, net	0.9	0.2	2.2	0.4
Total other income and expenses	28.2	18.6	84.1	54.4
Interest Income			0.3	0.1
Interest Expense	7.7	4.3	17.2	12.2
Earnings Before Income Taxes	43.7	38.6	130.8	111.5
Income Tax Expense	0.2	0.2	0.8	0.8
Net Income	43.5	38.4	130.0	110.7
Calculation of Limited Partners' Interest in Net Income:
Net income	43.5	38.4	130.0	110.7
Less: General partner's interest in net income	5.4	2.7	14.5	7.4
Limited partners' interest in net income	$ 38.1	$ 35.7	$ 115.5	$ 103.3
Weighted-average limited partner units outstanding-basic and diluted	96,300,000	80,300,000	92,000,000	80,300,000
Net income per limited partner unit-basic and diluted	0.40	0.44	1.26	1.29
Distributions paid per limited partner unit during the periods presented	$ 0.465	$ 0.430	$ 1.375	$ 1.260

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Business Segment Data (Detail) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Operating revenues	$ 52.9	$ 49.0	$ 147.1	$ 146.9
Earning before interest and income tax	51.4	42.9	147.7	123.6
Interest Income			0.3	0.1
Interest Expense	7.7	4.3	17.2	12.2
Earnings Before Income Taxes	43.7	38.6	130.8	111.5
Gas Transportation and Storage
Segment Reporting Information [Line Items]
Operating revenues	52.9	49.0	147.1	146.9
Earning before interest and income tax	25.9	26.0	73.1	76.2
All Other Segments
Segment Reporting Information [Line Items]
Earning before interest and income tax	$ 25.5	$ 16.9	$ 74.6	$ 47.4

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Credit Facility Summary (Detail) (Spectra Energy Partners, LP, USD $) In Millions	9 Months Ended
	Sep. 30, 2011
Spectra Energy Partners, LP
Debt Instrument [Line Items]
Expiration Date	2012
Credit Facility Capacity	$ 500.0
Revolving Credit Outstanding	$ 10.0

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Equity in Earnings of Unconsolidated Affiliates (Detail) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Schedule of Equity Method Investments [Line Items]
Equity in Earnings of Unconsolidated Affiliates	$ 27.3	$ 18.4	$ 81.9	$ 54.0
Gulfstream
Schedule of Equity Method Investments [Line Items]
Equity in Earnings of Unconsolidated Affiliates	16.2	8.2	48.4	23.7
Market Hub Partners LLC
Schedule of Equity Method Investments [Line Items]
Equity in Earnings of Unconsolidated Affiliates	$ 11.1	$ 10.2	$ 33.5	$ 30.3

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Summarized Financial Information of Unconsolidated Affiliates Presented at 100 Percent (Detail) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Schedule of Equity Method Investments [Line Items]
Operating revenues	$ 52.9	$ 49.0	$ 147.1	$ 146.9
Operating expenses	29.7	24.7	83.5	77.7
Operating Income	23.2	24.3	63.6	69.2
Net income	43.5	38.4	130.0	110.7
Gulfstream
Schedule of Equity Method Investments [Line Items]
Operating revenues	69.7	69.5	205.0	203.5
Operating expenses	18.7	18.4	53.8	54.8
Operating Income	51.0	51.1	151.2	148.7
Net income	33.0	33.8	98.8	96.9
Market Hub Partners LLC
Schedule of Equity Method Investments [Line Items]
Operating revenues	31.0	29.2	92.1	88.1
Operating expenses	8.6	9.0	24.9	28.1
Operating Income	22.4	20.2	67.2	60.0
Net income	$ 22.3	$ 20.3	$ 67.1	$ 60.6

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Income Taxes - Additional Information (Detail) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011
Investments, Owned, Federal Income Tax Note [Line Items]
Recognized uncertain tax positions	$ 3