Exhibit 99.1

		801 E. 86th Avenue
		Merrillville, IN 46410

October 29, 2010

FOR ADDITIONAL INFORMATION
Media		Investors
Mike Banas		Randy Hulen
Communications Manager		Managing Director, Investor Relations
(219) 647-5581		(219) 647-5688
mbanas@nisource.com		rghulen@nisource.com

NiSource Reports Third Quarter Results, Raises 2010 Outlook

	•		Solid results drive increase in 2010 net operating earnings guidance
	•		Significant progress advancing Indiana regulatory agenda
	•		Strategic pipeline and midstream growth projects move forward

MERRILLVILLE, Ind. — NiSource Inc. (NYSE: NI) today announced net operating earnings from continuing operations (non-GAAP) of $10.3 million, or 4 cents per share, for the three months ended September 30, 2010, a decrease from $19.4 million, or 7 cents per share, for the third quarter of 2009. Operating earnings (non-GAAP) were $109.9 million for the recent three months compared to $134.8 million for the same period in 2009.

On a GAAP basis, NiSource reported income from continuing operations for the three months ended September 30, 2010, of $33.4 million, or 12 cents per share, compared with a loss of $13.2 million, or 5 cents per share, in the same period a year ago. Operating income was $123.3 million for the third quarter of 2010 compared with $93.6 million in the year-ago period. Schedules 1 and 2 of this news release contain a reconciliation of net operating earnings and operating earnings from continuing operations to GAAP.

The company’s third quarter results benefited from increased electric industrial margins and off-system sales, as well as increased gas distribution revenues due to regulatory and infrastructure programs. These revenue increases were offset by anticipated increases in operating expenses, taxes and depreciation addressed in the segment discussions below.

NiSource President and Chief Executive Officer Robert C. Skaggs, Jr. noted that third quarter operating earnings were expected to be somewhat below 2009 levels due to the items mentioned above. However, he emphasized that the company’s overall 2010 financial performance is expected to exceed the net operating earnings outlook of $1.10 to $1.20 per share (non-GAAP) provided earlier in the year.

“Based on NiSource’s solid year-to-date results and continued gradual economic recovery in some of our key markets, we are increasing our 2010 net operating earnings outlook to $1.20 to $1.25 per share. In addition, we are reiterating NiSource’s commitment to growing earnings annually by 3 to 5 percent on a long term, sustainable basis,” Skaggs said.

“NiSource’s improved earnings outlook reflects the core strength of our team’s 2010 performance and signs of resilience in some of our key markets,” Skaggs said. “We are confident we will deliver on this improved outlook as we continue to execute on our balanced strategy to meet the needs of our customers and enhance shareholder value through long-term, infrastructure investment-driven growth.”

Building flexibility to fund infrastructure investments

NiSource enhanced its ability to invest in new infrastructure improvements and growth opportunities through the successful execution of a $400 million equity offering of common stock in September. The offering, structured under a 24-month forward sale agreement, was fully subscribed under favorable pricing terms.

“For some time, we have highlighted the deep inventory of attractive infrastructure investment opportunities available to NiSource’s three business units — amounting to approximately $1 billion annually — and we’ve emphasized our focus on building the financial capability to take advantage of those opportunities,” Skaggs said.

“We also made clear, that as we managed the funding of these investments, we would do so in a manner consistent with our commitments to create long-term shareholder value, maintain our dividend and preserve our investment grade credit rating,” Skaggs continued. “The successful equity offering meets these key criteria and positions the company to sustainably grow long-term earnings at the upper end of our targeted range.”

Milestone regulatory advancements in Indiana

NiSource’s Indiana team achieved several significant regulatory milestones during the third quarter as part of its commitment to enhance customer service, restore appropriate earnings levels and position the companies for continued growth.

	•		On Aug. 25, Northern Indiana Public Service Company’s (NIPSCO) electric business received an order from the Indiana Utility Regulatory Commission (IURC) on the company’s 2008 electric base rate case. The order, which is subject to rehearing and appeals processes, is in line with the company’s expectations and sets the stage for restoring NIPSCO’s electric earnings to an appropriate level by 2012.
	•		As previously discussed, NIPSCO plans to submit a follow-up electric rate case filing with the IURC in the fourth quarter of this year. The filing is expected to address items that have changed since the company’s 2008 rate filing, including factors related to the economic downturn, changes in customer usage and operating conditions, and efforts to enhance customer programs and rate design.
	•		On Aug. 24, parties in NIPSCO’s gas base rate case filed a unanimous settlement proposal with the IURC. The proposal, if approved, will result in an overall rate decrease for customers while enhancing operating earnings and preserving the company’s rate base. The settlement also proposes enhancements in rate design and continued strong support for low-income customer assistance, energy efficiency and conservation programs. A decision by the IURC is expected in the fourth quarter.

“The third quarter marked several significant milestones in NIPSCO’s efforts to enhance customer service, invest in Indiana’s critical energy infrastructure and chart a course for long-term growth,” Skaggs noted. “Going forward, our Indiana team is committed to working with all stakeholders in a constructive and collaborative fashion to continue addressing the needs of Indiana consumers and investors.”

Pipeline growth projects in Marcellus Shale region advance

During the quarter, NiSource’s Gas Transmission & Storage Operations (NGT&S) continued to advance strategic infrastructure investments linked to the Marcellus Shale production region in Appalachia.

	•		On Aug. 12, NGT&S announced a partnership with UGI Energy Services, Inc., to develop a new natural gas pipeline providing Marcellus Shale producers in Pennsylvania improved access to high-value markets. The project, which is in the evaluation and development stage, could provide as much as 500,000 dekatherms per day (Dth/d) of additional transportation capacity for natural gas production in north-central Pennsylvania and southern New York.
	•		On Sept. 27, NGT&S announced commencement of service under the nearly $80 million Majorsville expansion in southwestern Pennsylvania. The project, developed jointly with MarkWest Liberty Midstream & Resources L.L.C., is the first integrated gathering and processing system serving Marcellus production in northern West Virginia. Fully contracted, the pipeline and compression assets allow NGT&S to gather and deliver more than 325,000 Dth/d of Marcellus production gas to the new MarkWest Liberty Majorsville processing plant.
	•		The team also is advancing additional Marcellus projects, including the $14 million Line WB Expansion and the $18 million Clendenin Project, projected to be in service by Jan. 2011 and second quarter 2011 respectively.
	•		On Oct. 28, Columbia Gulf Transmission filed its first rate case in more than 14 years with the Federal Energy Regulatory Commission. The filing seeks an increase in revenues of approximately $50 million per year, reflecting updated costs and operating conditions. Rates are anticipated to be placed into effect, subject to refund, in mid-2011.

“The NGT&S team is executing on our strategy to grow the business through thoughtful, customer-driven projects leveraging our geographic presence in the Marcellus Shale region, including pursuing opportunities to transport production gas to processing facilities and market centers,” Skaggs said. “At the same time, we’re maximizing value from our existing assets by managing long-term contracts, expanding our customer base and maintaining safe and reliable operations.”

Continued execution of infrastructure and regulatory programs

NiSource’s Gas Distribution Operations (NGD) continues to execute its strategy of combining long-term infrastructure replacement programs with complementary regulatory initiatives.

	•		NGD continues to proactively advance replacement and upgrades of its infrastructure to ensure a safe and reliable distribution system. This includes significant, revenue-producing programs at our largest utilities, Columbia Gas of Ohio, Columbia Gas of Pennsylvania and Columbia Gas of Massachusetts (formerly known as Bay State Gas Company).
	•		The Pennsylvania Public Utility Commission (PUC) approved a Columbia Gas of Pennsylvania base rate case settlement on August 18, with new rates effective on Oct. 1. In addition to increasing the company’s base revenues, the approval increases funding of the company’s Emergency Repair Program and begins offering rebates to moderate-income customers who participate in its Income Qualified Energy Efficiency Program.
	•		Columbia Gas of Virginia’s rate case, pending before the Virginia State Corporation Commission, proposes an increase in revenues of $13 million and changes to the company’s rate design, including increases to fixed monthly customer charges and the introduction of a weather normalization adjustment. Hearings are scheduled for Nov. 16, with new rates anticipated to be effective January 1, 2011.

“Infrastructure and customer programs continue to advance at NGD,” Skaggs said. “In addition to enhancing our ability to provide safe, reliable and responsive service to our millions of natural gas customers, these core programs continue to produce predictable, long-term and low-risk earnings growth.”

2010 earnings guidance increased

As noted above, NiSource is increasing its full-year guidance to $1.20 to $1.25 per share of net operating earnings (non-GAAP). As outlined in the company’s Feb. 1, 2010 earnings release, due to the unpredictability of weather and other factors, NiSource is not providing GAAP earnings guidance.

Third Quarter 2010 Operating Earnings — Segment Results (non-GAAP)

NiSource’s consolidated third-quarter 2010 operating earnings (non-GAAP) were $109.9 million, compared to $134.8 million for the same period in 2009. Refer to Schedule 2 for the items included in 2010 and 2009 GAAP operating income but excluded from operating earnings.

Operating earnings for NiSource’s business segments for the quarter ended September 30, 2010, are discussed below.

Gas Distribution Operations reported an operating earnings loss for the current quarter of $40.7 million compared to an operating earnings loss of $30.0 million in the third quarter of 2009. Net revenues, excluding the impact of regulatory trackers, increased $8.5 million, primarily attributable to regulatory and service programs. The increase in regulatory and service programs was largely due to Columbia Gas of Ohio’s previously announced change from a volumetric to straight fixed-variable rate design. Additionally, Columbia Gas of Ohio implemented new rates under its approved infrastructure replacement program. The increase in revenue was partially offset by a decrease in commercial and residential margins as well as a decrease in off-system sales.

Operating expenses, excluding trackers, were $19.2 million higher than the comparable 2009 period. The increase was primarily attributable to higher employee and administration costs, including the impacts of the previously deferred 2009 pension costs by Columbia Gas of Ohio.

Gas Transmission and Storage Operations reported operating earnings for the current quarter of $76.4 million compared to operating earnings of $100.2 million in the third quarter of 2009. Net revenues, excluding the impact of trackers, decreased by $7.8 million, driven by decreases in revenues from shorter term transportation and storage services and mineral rights lease revenues. These decreases were partially offset by higher demand and commodity margin revenues.

Operating expenses, excluding the impact of trackers, increased $13.6 million compared to the third quarter of 2009. This increase was the result of an increase in maintenance and other outside service costs and employee and administration expenses, including pension costs.

Equity earnings decreased by $2.4 million primarily due to lower earnings at Millennium Pipeline, primarily because of higher interest expense.

Electric Operations reported operating earnings of $80.0 million versus operating earnings of $69.6 million from the same quarter last year. Net revenues, excluding trackers, increased by $17.4 million primarily as a result of increased industrial margins and higher off-system sales.

Operating expenses, excluding the impact of trackers, increased by $7.0 million due primarily to increased employee and administration costs, higher electric generation costs and higher taxes (property and other).

Corporate and Other Operations reported an operating earnings loss of $5.8 million for the current quarter compared to a loss of $5.0 million in the third quarter of 2009.

In the first quarter of 2010, the company eliminated the “Other” segment. NiSource’s decision to wind down the unregulated natural gas marketing activities will impact the results from Other Operations. Results previously recorded as “Other” are now included within “Corporate and Other Operations.”

Other Items

Interest expense decreased by $7.4 million primarily due to the December 2009 term loan repayment, the maturity of the company’s November 2009 floating rate note, and lower short-term interest rates. The benefits were partially offset by incremental interest expense associated with the issuance of December 2009 long-term debt and the effect of the adoption of new accounting requirements related to the company’s accounts receivable facilities.

Other-net was essentially flat for the third quarter of 2010 compared to the third quarter of 2009.

The effective tax rate of net operating earnings was 28.5 percent compared to 39.8 percent for the same period last year. During the third quarter of 2010, a rate settlement was approved that reduced income tax expense for accelerated tax deductions on property differences.

Nine-Month Period 2010 Operating Earnings — Segment Results (non-GAAP)

NiSource’s consolidated operating earnings (non-GAAP) for the nine months ended September 30, 2010, were $669.0 million, compared to $621.6 million for the same period in 2009. Refer to Schedule 2 for the items included in 2010 and 2009 GAAP operating income but excluded from operating earnings.

Operating earnings for NiSource’s business segments for the nine months ended September 30, 2010 are discussed below.

Gas Distribution Operations reported operating earnings of $229.9 million compared to $214.8 million reported for the nine months ended September 30, 2009. Net revenues, excluding the impact of regulatory trackers, increased $28.0 million, primarily attributable to regulatory and service programs and off-system sales. The increase to regulatory and service programs is primarily a result of recent rate case outcomes as well as Columbia Gas of Ohio’s implementation of new rates under its approved infrastructure replacement program. These increased revenues were partially offset by a decrease in commercial and residential margins as well as decreased forfeited discounts and late payments.

Operating expenses, excluding trackers, were $12.9 million higher than the comparable period, as a result of an increase in employee and administration expenses and depreciation costs. These increases were partially offset by a decrease in uncollectible expense.

Gas Transmission and Storage Operations reported operating earnings of $277.2 million versus operating earnings of $292.2 million as of September 30, 2009. Net revenues, excluding trackers, increased $14.1 million primarily attributable to increases in demand margin revenues, recognition of revenue related to a previously deferred gain for native gas contributed to Hardy Storage Company (Hardy Storage) from Columbia Gas Transmission following Hardy Storage securing permanent financing, and fees received from a contract buyout. Additionally, net revenue increased due to an increase in mineral rights royalty revenue. The increase in net revenues was partially offset by decreases in revenues from shorter term transportation and storage services as well as mineral rights lease revenue.

Operating expenses, excluding the impact of trackers, increased by $30.8 million, primarily due to increased maintenance and outside service costs, higher employee and administration expenses, and increased depreciation costs. These increases were partially offset by decreases in legal and bad debt reserves.

Equity earnings increased by $1.7 million primarily due to lower interest charges at Millennium Pipeline.

Electric Operations reported operating earnings of $174.5 million for the nine months ended September 30, 2010, compared with operating earnings of $126.8 million for the prior year period. Net revenues increased by $59.9 million primarily from increased industrial and residential margins, higher off-system sales, and returns associated with environmental investments. These increases were partially offset by a increase in revenue credits.

Operating expenses, excluding the impact of trackers, increased by $12.2 million due primarily to property taxes and environmental costs. Additionally, the increase is due to higher depreciation costs. These increases were partially offset by a decrease in uncollectible accounts.

Corporate and Other Operations reported an operating earnings loss of $12.6 million for the nine month period ended September 30, 2010, compared to an operating earnings loss of $12.2 million for the nine month period ended September 30, 2009.

Other Items

Interest expense decreased by $5.9 million primarily due to the December 2009 term loan repayment, the maturity of the company’s November 2009 floating rate note, and lower short-term interest rates. The benefits were partially offset by incremental interest expense associated with the issuance of December 2009 long-term debt and the effect of the adoption of new accounting requirements related to the company’s accounts receivable facilities.

Other-net increased $9.6 million for the period ended September 30, 2010, compared to the period ended September 30, 2009 primarily due to favorable AFUDC rates and a reclassification of interest expense related to the adoption of new accounting requirements noted above.

The effective tax rate of net operating earnings was 35.6 percent compared to 38.5 percent for the same period last year. During the third-quarter of 2010, a rate settlement was approved that reduced income tax expense for accelerated tax deductions on property differences.

Income from Continuing Operations (GAAP)

As noted above, on a GAAP basis, NiSource reported net income from continuing operations for the three months ended September 30, 2010, of $33.4 million, or 12 cents per share, compared with a net loss from continuing operations of $13.2 million, or 5 cents per share, in the same period a year ago. Operating income was $123.3 million for the third quarter of 2010, compared with $93.6 million in the year-ago period.

On a GAAP basis, NiSource reported net income from continuing operations for the nine months ended September 30, 2010, of $258.8 million, or 93 cents per share, compared with $142.0 million, or 52 cents per share last year. Operating income was $665.9 million for the nine months ended September 30, 2010, versus $553.5 million in the year-ago period.

Refer to Schedule 1 for a complete list of the items included in 2010 and 2009 GAAP income from Continuing Operations but excluded from net operating earnings.

About NiSource

NiSource Inc. (NYSE: NI), based in Merrillville, Ind., is a Fortune 500 company engaged in natural gas transmission, storage and distribution, as well as electric generation, transmission and distribution. NiSource operating companies deliver energy to 3.8 million customers located within the high-demand energy corridor stretching from the Gulf Coast through the Midwest to New England. Information about NiSource and its subsidiaries is available via the Internet at www.nisource.com. NI-F

Forward-Looking Statements

This news release includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Those statements include statements regarding the intent, belief or current expectations of NiSource and its management. Although NiSource believes that its expectations are based on reasonable assumptions, it can give no assurance that its goals will be achieved. Readers are cautioned that the forward-looking statements in this news release are not guarantees of future performance and involve a number of risks and uncertainties, and that actual results could differ materially from those indicated by such forward-looking statements. Important factors that could cause actual results to differ materially from those indicated by such forward-looking statements include, but are not limited to, the following: weather; fluctuations in supply and demand for energy commodities; growth opportunities for NiSource’s businesses; increased competition in deregulated energy markets; the success of regulatory and commercial initiatives; dealings with third parties over whom NiSource has no control; actual operating experience of NiSource’s assets; the regulatory process; regulatory and legislative changes; the impact of potential new environmental laws or regulations; the results of material litigation; changes in pension funding requirements; changes in general economic, capital and commodity market conditions; and counter-party credit risk, and the matters set forth in the “Risk Factors” sections in NiSource’s 2009 Form 10-K and 2010 Forms 10-Q, many of which risks are beyond the control of NiSource. NiSource expressly disclaims a duty to update any of the forward-looking statements contained in this release.

NiSource Inc.
Consolidated Net Operating Earnings (Non-GAAP)
(unaudited)

		Three Months								Nine Months
		Ended September 30,								Ended September 30,
(in millions, except per share amounts)		2010				2009				2010				2009
Net Revenues
Gas Distribution		$	317.5			$	296.7			$	2,129.5			$	2,455.0
Gas Transportation and Storage			270.7				242.4				905.5				898.7
Electric			398.5				342.2				1,056.1				934.6
Other			17.8				20.3				59.5				45.0
Gross Revenues			1,004.5				901.6				4,150.6				4,333.3
Cost of Sales (excluding depreciation and amortization)			296.1				219.2				1,626.9				1,909.8
Total Net Revenues			708.4				682.4				2,523.7				2,423.5
Operating Expenses
Operation and maintenance			354.4				323.7				1,023.1				987.8
Operation and maintenance — trackers			32.9				27.5				177.1				175.0
Depreciation and amortization			149.4				146.3				445.3				434.3
Depreciation and amortization — trackers			3.8				2.4				9.3				6.2
Other taxes			52.4				46.3				158.5				149.5
Other taxes — trackers			9.1				7.3				52.7				58.8
Total Operating Expenses			602.0				553.5				1,866.0				1,811.6
Equity Earnings in Unconsolidated Affiliates			3.5				5.9				11.3				9.7
Operating Earnings			109.9				134.8				669.0				621.6
Other Income (Deductions)
Interest expense, net			(97.6	)			(105.0	)			(294.8	)			(300.7	)
Other, net			2.1				2.4				7.3				(2.3	)
Total Other (Deductions)			(95.5	)			(102.6	)			(287.5	)			(303.0	)
Operating Earnings From Continuing Operations
Before Income Taxes			14.4				32.2				381.5				318.6
Income Taxes			4.1				12.8				135.8				122.6
Net Operating Earnings from Continuing Operations			10.3				19.4				245.7				196.0
GAAP Adjustment			23.1				(32.6	)			13.1				(54.0	)
GAAP Income (Loss) from Continuing Operations		$	33.4			$	(13.2	)		$	258.8			$	142.0
Basic Net Operating Earnings Per Share from Continuing Operations			0.04				0.07				0.89				0.71
GAAP Basic Earnings (Loss) Per Share from Continuing Operations			0.12				(0.05	)			0.93				0.52
Basic Average Common Shares Outstanding			278.1				275.4				277.5				274.8

NiSource Inc.
Segment Operating Earnings (Non-GAAP)

		Three Months								Nine Months
Gas Distribution Operations		Ended September 30,								Ended September 30,
(in millions)		2010				2009				2010				2009
Net Revenues
Sales Revenues		$	431.3			$	386.5			$	2,553.8			$	2,896.0
Less: Cost of gas sold			188.3				154.5				1,385.8				1,744.9
Net Revenues			243.0				232.0				1,168.0				1,151.1
Operating Expenses
Operation and maintenance			176.3				159.9				506.9				497.8
Operation and maintenance — trackers			14.1				13.2				126.1				131.0
Depreciation and amortization			63.9				62.9				189.8				186.2
Other taxes			20.4				18.6				62.6				62.4
Other taxes — trackers			9.0				7.4				52.7				58.9
Total Operating Expenses			283.7				262.0				938.1				936.3
Operating (Loss) Earnings		$	(40.7	)		$	(30.0	)		$	229.9			$	214.8
GAAP Adjustment			(1.8	)			(3.9	)			(18.8	)			(1.6	)
GAAP Operating (Loss) Income		$	(42.5	)		$	(33.9	)		$	211.1			$	213.2

		Three Months								Nine Months
Gas Transmission and Storage Operations		Ended September 30,								Ended September 30,
(in millions)		2010				2009				2010				2009
Net Revenues
Transportation revenues		$	163.7			$	163.0			$	522.6			$	517.3
Storage revenues			49.9				49.0				149.0				142.4
Other revenues			3.9				9.7				19.8				13.4
Net Operating Revenues			217.5				221.7				691.4				673.1
Operating Expenses
Operation and maintenance			82.6				71.8				242.5				218.0
Operation and maintenance — trackers			16.1				12.5				44.3				40.1
Depreciation and amortization			31.8				30.5				94.9				90.1
Other taxes			14.0				12.5				43.8				42.3
Total Operating Expenses			144.5				127.3				425.5				390.5
Equity Earnings in Unconsolidated Affiliates			3.4				5.8				11.3				9.6
Operating Earnings		$	76.4			$	100.2			$	277.2			$	292.2
GAAP Adjustment			(0.2	)			(0.3	)			(0.2	)			(19.8	)
GAAP Operating Income		$	76.2			$	99.9			$	277.0			$	272.4

NiSource Inc.
Segment Operating Earnings (Non-GAAP)

		Three Months								Nine Months
Electric Operations		Ended September 30,								Ended September 30,
(in millions)		2010				2009				2010				2009
Net Revenues
Sales revenues		$	389.8			$	344.1			$	1,051.4			$	939.6
Less: Cost of sales			142.5				116.4				389.9				343.8
Net Revenues			247.3				227.7				661.5				595.8
Operating Expenses
Operation and maintenance			95.2				91.4				276.6				273.5
Operation and maintenance — trackers			2.7				1.7				6.7				3.9
Depreciation and amortization			50.0				49.5				149.7				147.3
Depreciation and amortization — trackers			3.7				2.5				9.3				6.3
Other taxes			15.7				13.0				44.7				38.0
Total Operating Expenses			167.3				158.1				487.0				469.0
Operating Earnings		$	80.0			$	69.6			$	174.5			$	126.8
GAAP Adjustment			15.9				(26.1	)			16.1				(43.0	)
GAAP Operating Income		$	95.9			$	43.5			$	190.6			$	83.8

		Three Months								Nine Months
Corporate and Other Operations		Ended September 30,								Ended September 30,
(in millions)		2010				2009				2010				2009
Operating Loss		$	(5.8	)		$	(5.0	)		$	(12.6	)		$	(12.2	)
GAAP Adjustment			(0.5	)			(10.9	)			(0.2	)			(3.7	)
GAAP Operating Loss		$	(6.3	)		$	(15.9	)		$	(12.8	)		$	(15.9	)

NiSource Inc.
Segment Volumes and Statistical Data

		Three Months								Nine Months
		Ended September 30,								Ended September 30,
Gas Distribution Operations		2010				2009				2010				2009
Sales and Transportation (MMDth)
Residential			15.0				16.5				170.2				181.7
Commercial			19.1				16.9				115.1				118.3
Industrial			98.3				75.6				284.3				246.2
Off System			13.7				14.6				56.8				44.7
Other			0.1				0.1				0.8				0.6
Total			146.2				123.7				627.2				591.5
Weather Adjustment			1.1				1.3				14.6				0.3
Sales and Transportation Volumes — Excluding Weather			147.3				125.0				641.8				591.8
Heating Degree Days			72				69				3,370				3,593
Normal Heating Degree Days			88				88				3,596				3,596
% Colder (Warmer) than Normal			(18	%)			(22	%)			(6	%)			(0	%)
Customers
Residential											2,980,557				2,972,887
Commercial											273,371				273,515
Industrial											7,686				7,822
Other											81				80
Total											3,261,695				3,254,304

		Three Months								Nine Months
		Ended September 30,								Ended September 30,
Gas Transmission and Storage Operations		2010				2009				2010				2009
Throughput (MMDth)
Columbia Transmission			191.1				158.4				750.1				736.9
Columbia Gulf			225.0				195.2				625.0				708.4
Crossroads Gas Pipeline			6.5				8.6				20.2				26.0
Intrasegment eliminations			(141.6	)			(114.8	)			(423.2	)			(443.6	)
Total			281.0				247.4				972.1				1,027.7

NiSource Inc.
Segment Volumes and Statistical Data

		Three Months								Nine Months
		Ended September 30,								Ended September 30,
Electric Operations		2010				2009				2010				2009
Sales (Gigawatt Hours)
Residential			1,175.7				843.9				2,833.2				2,445.5
Commercial			1,103.8				1,004.5				2,991.1				2,907.6
Industrial			2,180.0				1,944.5				6,321.8				5,723.4
Wholesale			330.0				208.9				635.7				385.2
Other			47.0				33.3				128.2				112.4
Total			4,836.5				4,035.1				12,910.0				11,574.1
Weather Adjustment			(470.0	)			326.0				(501.7	)			346.5
Sales Volumes — Excluding Weather impacts			4,366.5				4,361.1				12,408.3				11,920.6
Cooling Degree Days			700				318				977				515
Normal Cooling Degree Days			578				578				808				808
% Warmer (Colder) than Normal			21	%			(45	%)			21	%			(36	%)
Electric Customers
Residential											399,556				398,408
Commercial											53,696				53,396
Industrial											2,435				2,444
Wholesale											15				13
Other											741				751
Total											456,443				455,012

NiSource Inc.
Schedule 1 — Reconciliation of Net Operating Earnings to GAAP

		Three Months								Nine Months
		Ended September 30,								Ended September 30,
(in millions, except per share amounts)		2010				2009				2010				2009
Net Operating Earnings from Continuing Operations (Non-GAAP)		$	10.3			$	19.4			$	245.7			$	196.0
Items excluded from operating earnings:
Net Revenues:
Weather — compared to normal			8.8				(24.6	)			(1.3	)			(22.5	)
Revenue adjustment			—				—				(5.7	)			(9.0	)
Unregulated natural gas marketing business			0.9				(0.8	)			5.8				13.2
Operating Expenses:
Restructuring			0.2				(4.8	)			(0.7	)			(24.6	)
Transition charges (IBM Agreement)			—				(0.3	)			—				(3.4	)
Environmental reserve adjustment			6.0				—				6.0				—
Unregulated natural gas marketing business			(1.3	)			(2.4	)			(5.9	)			(8.3	)
Legal reserve			—				(0.6	)			—				(7.0	)
Gain/Loss on sale of assets and asset impairments			(1.2	)			(7.7	)			(1.3	)			(6.5	)
Total items excluded from operating earnings			13.4				(41.2	)			(3.1	)			(68.1	)
Gain on early extinguishment of debt			—				—				—				2.5
Tax effect of above items			(5.5	)			16.4				1.0				19.4
Other income tax adjustments
Income Taxes — Tax Method change			—				(7.8	)			—				(7.8	)
Income Taxes — Rate settlement flow-through			15.2				—				15.2				—
Total other income tax adjustments			15.2				(7.8	)			15.2				(7.8	)
Total items excluded from net operating earnings			23.1				(32.6	)			13.1				(54.0	)
Reported Income (Loss) from Continuing Operations — GAAP		$	33.4			$	(13.2	)		$	258.8			$	142.0
Basic Average Common Shares Outstanding			278.1				275.4				277.5				274.8
Basic Net Operating Earnings Per Share from Continuing Operations			0.04				0.07				0.89				0.71
Items excluded from net operating earnings (after-tax)			0.08				(0.12	)			0.04				(0.19	)
GAAP Basic Earnings (Loss) Per Share from Continuing Operations			0.12				(0.05	)			0.93				0.52

NiSource Inc.
Schedule 2 — Adjustments by Segment from Operating Earnings to GAAP
For Quarter ended September 30,

2010 (in millions)

						Gas
		Gas				Transmission								Corporate
		Distribution				and Storage				Electric				& Other				Total
Operating Earnings (Loss)		$	(40.7	)		$	76.4			$	80.0			$	(5.8	)		$	109.9
Net Revenues:
Weather (compared to normal)			(1.1	)			—				9.9				—				8.8
Unregulated natural gas marketing business			—				—				—				0.9				0.9
Total Impact — Net Revenues			(1.1	)			—				9.9				0.9				9.7
Operating Expenses
Restructuring			0.1				—				0.1				—				0.2
Environmental Reserve			—				—				6.0				—				6.0
Gain/Loss on sale of assets and asset impairments			(0.8	)			(0.2	)			(0.1	)			(0.1	)			(1.2	)
Unregulated natural gas marketing business			—				—				—				(1.3	)			(1.3	)
Total Impact — Operating Expenses			(0.7	)			(0.2	)			6.0				(1.4	)			3.7
Total Impact — Operating Income (Loss)		$	(1.8	)		$	(0.2	)		$	15.9			$	(0.5	)		$	13.4
Operating Income (Loss) — GAAP		$	(42.5	)		$	76.2			$	95.9			$	(6.3	)		$	123.3

2009 (in millions)

						Gas
		Gas				Transmission
		Distribution				and Storage				Electric				Corporate				Total
Operating Earnings (Loss)		$	(30.0	)		$	100.2			$	69.6			$	(5.0	)		$	134.8
Net Revenues:
Weather (compared to normal)			(2.3	)			—				(22.3	)			—				(24.6	)
Unregulated natural gas marketing business			—				—				—				(0.8	)			(0.8	)
Total Impact — Net Revenues			(2.3	)			—				(22.3	)			(0.8	)			(25.4	)
Operating Expenses
Restructuring			(1.4	)			(0.2	)			(3.2	)			—				(4.8	)
Transition Charges (IBM Agreement)			(0.2	)			(0.1	)			—				—				(0.3	)
Unregulated natural gas marketing business			—				—				—				(2.4	)			(2.4	)
Legal reserve			—				—				(0.6	)			—				(0.6	)
Gain/Loss on sale of assets and asset impairments			—				—				—				(7.7	)			(7.7	)
Total Impact — Operating Expenses			(1.6	)			(0.3	)			(3.8	)			(10.1	)			(15.8	)
Total Impact — Operating Loss		$	(3.9	)		$	(0.3	)		$	(26.1	)		$	(10.9	)		$	(41.2	)
Operating Income (Loss) — GAAP		$	(33.9	)		$	99.9			$	43.5			$	(15.9	)		$	93.6

NiSource Inc.
Schedule 2 — Adjustments by Segment from Operating Earnings to GAAP
For Nine Months ended September 30,

2010 (in millions)

						Gas
		Gas				Transmission								Corporate
		Distribution				and Storage				Electric				and Other				Total
Operating Earnings (Loss)		$	229.9			$	277.2			$	174.5			$	(12.6	)		$	669.0
Net Revenues:
Weather (compared to normal)			(12.0	)			—				10.7				—				(1.3	)
Revenue sales adjustment			(5.7	)			—				—				—				(5.7	)
Unregulated natural gas marketing business			—				—				—				5.8				5.8
Total Impact — Net Revenues			(17.7	)			—				10.7				5.8				(1.2	)
Operating Expenses
Restructuring			(0.2	)			—				(0.5	)			—				(0.7	)
Environmental Reserve			—				—				6.0				—				6.0
Unregulated natural gas marketing business			—				—				—				(5.9	)			(5.9	)
(Loss) on sale of assets and asset impairments			(0.9	)			(0.2	)			(0.1	)			(0.1	)			(1.3	)
Total Impact — Operating Expenses			(1.1	)			(0.2	)			5.4				(6.0	)			(1.9	)
Total Impact — Operating Income (Loss)		$	(18.8	)		$	(0.2	)		$	16.1			$	(0.2	)		$	(3.1	)
Operating Income (Loss) — GAAP		$	211.1			$	277.0			$	190.6			$	(12.8	)		$	665.9

2009 (in millions)

						Gas
		Gas				Transmission
		Distribution				and Storage				Electric				Corporate				Total
Operating Earnings (Loss)		$	214.8			$	292.2			$	126.8			$	(12.2	)		$	621.6
Net Revenues:
Weather (compared to normal)			1.0				—				(23.5	)			—				(22.5	)
Revenue adjustment			—				—				(9.0	)			—				(9.0	)
Unregulated natural gas marketing business			—				—				—				13.2				13.2
Total Impact — Net Revenues			1.0				—				(32.5	)			13.2				(18.3	)
Operating Expenses
Restructuring			(1.4	)			(20.0	)			(3.2	)			—				(24.6	)
Transition charges (IBM Agreement)			(1.2	)			(1.8	)			(0.3	)			(0.1	)			(3.4	)
Unregulated natural gas marketing business			—				—				—				(8.3	)			(8.3	)
Legal reserve			—				—				(7.0	)			—				(7.0	)
Gain/(Loss) on sale of assets and asset impairments			—				2.0				—				(8.5	)			(6.5	)
Total Impact — Operating Expenses			(2.6	)			(19.8	)			(10.5	)			(16.9	)			(49.8	)
Total Impact — Operating Loss		$	(1.6	)		$	(19.8	)		$	(43.0	)		$	(3.7	)		$	(68.1	)
Operating Income (Loss) — GAAP		$	213.2			$	272.4			$	83.8			$	(15.9	)		$	553.5

NiSource Inc.
Consolidated Income Statement (GAAP)
(unaudited)

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
(in millions, except per share amounts)		2010				2009				2010				2009
Net Revenues
Gas Distribution		$	327.0			$	294.4			$	2,122.4			$	2,456.0
Gas Transportation and Storage			270.7				242.3				905.5				898.7
Electric			397.7				320.0				1,056.1				902.2
Other			142.7				118.2				583.9				708.6
Gross Revenues			1,138.1				974.9				4,667.9				4,965.5
Cost of Sales (excluding depreciation and amortization)			420.0				317.9				2,145.4				2,560.2
Total Net Revenues			718.1				657.0				2,522.5				2,405.3
Operating Expenses
Operation and maintenance			382.1				358.6				1,198.8				1,203.4
Depreciation and amortization			153.1				148.8				454.5				440.7
Impairment and loss on sale of assets, net			1.1				7.6				1.2				6.4
Other taxes			62.0				54.2				213.4				210.9
Total Operating Expenses			598.3				569.2				1,867.9				1,861.4
Equity Earnings in Unconsolidated Affiliates			3.5				5.8				11.3				9.6
Operating Income			123.3				93.6				665.9				553.5
Other Income (Deductions)
Interest expense, net			(97.6	)			(105.0	)			(294.8	)			(300.7	)
Other, net			2.1				2.4				7.3				(2.3	)
Gain on early extinguishment of long-term debt			—				—				—				2.5
Total Other Deductions			(95.5	)			(102.6	)			(287.5	)			(300.5	)
Income/(Loss) from Continuing Operations before Income Taxes			27.8				(9.0	)			378.4				253.0
Income Tax (Benefit) Expense			(5.6	)			4.2				119.6				111.0
Income/(Loss) from Continuing Operations			33.4				(13.2	)			258.8				142.0
Income/(Loss) from Discontinued Operations — net of taxes			(0.2	)			0.2				(0.3	)			(11.2	)
Gain (Loss) on Disposition of Discontinued Operations — net of taxes			—				(2.4	)			0.1				(2.6	)
Net Income (Loss)		$	33.2			$	(15.4	)		$	258.6			$	128.2
Basic Earnings (Loss) Per Share
Continuing operations		$	0.12			$	(0.05	)		$	0.93			$	0.52
Discontinued operations			—				—				—				(0.05	)
Basic Earnings (Loss) Per Share		$	0.12			$	(0.05	)		$	0.93			$	0.47
Diluted Earnings (Loss) Per Share
Continuing operations		$	0.12			$	(0.05	)		$	0.93			$	0.51
Discontinued operations			—				—				—				(0.04	)
Diluted Earnings (Loss) Per Share		$	0.12			$	(0.05	)		$	0.93			$	0.47
Dividends Declared Per Common Share		$	0.23			$	0.23			$	0.92			$	0.92
Basic Average Common Shares Outstanding			278.1				275.4				277.5				274.8
Diluted Average Common Shares			279.9				275.4				278.9				277.3

NiSource Inc.
Consolidated Balance Sheets (GAAP)
(unaudited)

		September 30,				December 31,
(in millions)		2010				2009
ASSETS
Property, Plant and Equipment
Utility Plant		$	19,274.3			$	19,041.1
Accumulated depreciation and amortization			(8,445.0	)			(8,387.1	)
Net utility plant			10,829.3				10,654.0
Other property, at cost, less accumulated depreciation			92.2				34.0
Net Property, Plant and Equipment			10,921.5				10,688.0
Investments and Other Assets
Assets of discontinued operations and assets held for sale			8.2				14.6
Unconsolidated affiliates			201.8				165.8
Other investments			144.5				129.2
Total Investments and Other Assets			354.5				309.6
Current Assets
Cash and cash equivalents			10.9				16.4
Restricted cash			276.5				174.7
Accounts receivable (less reserve of $41.3 and $39.6, respectively)			517.8				808.6
Income tax receivable			97.6				24.9
Gas inventory			438.8				384.8
Underrecovered gas and fuel costs			136.1				40.2
Materials and supplies, at average cost			94.6				102.3
Electric production fuel, at average cost			37.1				59.9
Price risk management assets			215.6				173.3
Exchange gas receivable			73.2				72.5
Regulatory assets			194.3				238.3
Assets of discontinued operations and assets held for sale			—				1.4
Prepayments and other			103.0				126.3
Total Current Assets			2,195.5				2,223.6
Other Assets
Price risk management assets			280.2				237.6
Regulatory assets			1,641.0				1,644.1
Goodwill			3,677.3				3,677.3
Intangible assets			311.4				319.6
Postretirement and postemployment benefits assets			20.2				19.8
Deferred charges and other			123.8				152.1
Total Other Assets			6,053.9				6,050.5
Total Assets		$	19,525.4			$	19,271.7