A presentation used during the Feb 19, 2013 earnings phone call to present relevant details about NiSource's 2012 results, and to forecast plans for 2013 and beyond.

1. Supplemental Slides
2012 Earnings
February 19, 2013

2. Forward-Looking Statements
This document contains forward-looking statements within the meaning of federal securities laws. These forward-looking
statements are subject to various risks and uncertainties. Factors that could cause actual results to differ materially from
the projections, forecasts, estimates and expectations discussed herein include, among other things, 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 new environmental laws and regulations; the results of material litigation; changes in pension funding
requirements; changes in general economic, capital and commodity market conditions; counter-party credit risk; and the
matters set forth in the “Risk Factors” sections in NiSource’s most recent Form 10-K and subsequent Forms 10-Q, many of
which are beyond the control of NiSource. Readers are cautioned not to place undue reliance on these forward-looking
statements, which speak only as of the date of this presentation. NiSource expressly disclaims a duty to update any of the
forward-looking statements contained in this document.
With regard to Net Operating Earnings Guidance for 2013 – it should be noted that there will likely be differences between net
operating earnings and GAAP earnings for matters including, but not limited to, weather, and other factors. NiSource is not able
to estimate the impact of such items on GAAP earnings and, as such, is not providing earnings guidance on a GAAP basis.
2
2

3. 2012 Key Takeaways
Established Track Record of Execution & Performance
• 2012 financial results squarely in line with earnings guidance
– 2012 EPS: $1.46 per share*
– 2012 total shareholder return: 8.5%
• Solid execution of infrastructure-focused capital investments
• Landmark pipeline modernization settlement achieved
• Deep infrastructure investment inventory identified
– $25B-$30B investment opportunity: $1.5B-$1.8B targeted annual capital spend
– 5-7% annual earnings growth
– 3-5% annual dividend growth
• Financial foundation, discipline to support enhanced growth plan
Building Long-Term, Sustainable Growth
* Net Operating Earnings from Continuing Operations (non-GAAP); For a Reconciliation to GAAP, See Schedule 1 of the Company’s Feb. 19, 2013 Earnings Release
3

4. 2012 Financial Highlights
Financial Results Squarely in Line with 2012 Earnings Guidance
Non-GAAP
2012* 2011* Change*
Net Operating Earnings
$427.2 $368.8 $58.4
from Continuing Operations
Net Operating Earnings Per Share $1.46 $1.32 $0.14
Operating Earnings $1,071.4 $946.3 $125.1
GAAP 2012* 2011* Change*
Income from Continuing Operations $410.6 $294.8 $115.8
Earnings Per Share $1.41 $1.05 $0.36
Operating Income $1,042.7 $890.1 $152.6
Total Shareholder Return Outperforms Utility Indices For Fourth Consecutive Year
* All Results Listed In Millions, Except for EPS; For a Reconciliation to GAAP, See Schedule 1 of the Company’s Feb. 19, 2013 Earnings Release
4

5. NiSource Gas Transmission & Storage – 2012
Highlights Growth, Modernization, Midstream and Minerals Progress
Continued
• Operating earnings $398M in 2012 vs. $360M in 2011*
• Landmark customer modernization settlement achieved
• Several growth projects placed into service; many others advance
• Midstream’s ~$160M, 425 MMcf per day Big Pine Gathering System to be in service by April 2013
• 2013 capital investment projected at ~$700M – includes modernization investment
Looking Ahead:
Project Key Components Status
Pipeline Modernization • 5-year initial settlement term • Approved by FERC
• $1.5B investment during initial settlement term • Projects initiated
• $100M annual maintenance investment
• Part of $4B+ program
Pennant Midstream, LLC • Gathering and processing facilities serving Utica region • Project on schedule and on budget
50/50 Joint Venture with Hilcorp • 400 million cubic feet/day gathering; 200 million cubic feet/day • Projected in-service 2H 2013
processing
• ~$300M initial joint venture investment (gross)
Hilcorp Utica Minerals Arrangement • ~100K combined acres • Test wells drilled in 2012; liquids content
• Acreage dedicated to Pennant Midstream consistent with other area wells
• A working and overriding royalty interest in program
Planned growth, modernization and • Significant and growing inventory of projects outlined • Complete project update outlined in appendix
midstream investments • Primarily focused on capturing market- and supply-driven
growth opportunities
Modernization Settlement Provides Long-Term Stakeholder Benefits
* Non-GAAP. For a Reconciliation to GAAP, See Schedule 2 of the Company’s Feb. 19, 2013 Earnings Release
5

6. Electric Operations – 2012 Highlights
Continuing to Deliver on Core Customer, Reliability and Environmental Initiatives
• Operating earnings $238M in 2012 vs. $202M in 2011*
• Environmental investments continue to advance
• Electric transmission projects approved and moving forward
• 2013 capital investment projected at ~$435M, focused primarily on environmental and reliability investments
Looking Ahead:
Highlight Key Components Status
Electric Generating Plant • $800M+ in total environmental investments • Schahfer construction on
Environmental Investments • Schahfer Flue Gas Desulfurization (FGD) investments: Units 14 & 15 schedule, on budget
• Michigan City FGD: Unit 12 • Michigan City FGD approved;
• Enhanced mercury and particulate controls planning and engineering in
progress
Electric Transmission System • 100-mile, 345-KV transmission project • First public outreach meetings
Enhancement – Reynolds to • $250M-$300M investment completed in early February 2013
Topeka Project • Projected in-service latter part of decade
Electric Transmission System • 66-mile, 765-KV transmission project • Preliminary planning in progress
Enhancement – Reynolds to • $300M-$400M investment (NIPSCO portion $150M - $200M)
Greentown (Joint Project) • Projected in-service latter part of decade
Long-term Infrastructure • Environmental investments to upgrade generation fleet: $700M - • Complete program update
Investments $1.4B opportunity outlined in appendix
• Electric transmission system improvements: $500M - $1B opportunity
• Modernize electric infrastructure: $3B - $4B opportunity
A Deep Inventory of Long-Term Investment Opportunities
* Non-GAAP. For a Reconciliation to GAAP, See Schedule 2 of the Company’s Feb. 19, 2013 Earnings Release
6

7. NiSource Gas Distribution – 2012 Highlights
Long-Term Infrastructure Investments, Customer Programs & Regulatory Initiatives
• Operating earnings $441M in 2012 vs. $425M in 2011*
• Revenues up $37M, reflecting regulatory and infrastructure programs**
• Columbia Gas of Massachusetts base rate case decision issued Nov. 30, 2012
• 2013 capital investment projected at ~$655M – includes ~$475M in growth and tracked investment
Looking Ahead
Highlight Key Components Status
Columbia Gas of Pennsylvania • Filed Sept. 28, 2012 • Settlement to be submitted for
Base Rate Case • Settlement in principle reached with parties on Feb. 8, 2013 approval to the PUC on or before
• Filed case reflects a fully projected test year and March 18, 2013
infrastructure investment recovery mechanism for • Rates projected to be in effect in July
investments through mid-2014 2013
• Filed case requested an annual revenue increase of $77
million
Columbia Gas of Pennsylvania • Distribution System Improvement Charge (DSIC) filing to • Decision expected Q1 2013
Base DISC Filing capture infrastructure investments from the later part of
2012
Infrastructure • Expanded ~$10B long-term program across service territory • Complete program update outlined in
Modernization appendix
A Growing Investment Inventory
* Non-GAAP. For a Reconciliation to GAAP, See Schedule 2 of the Company’s Feb. 19, 2013 Earnings Release
** Revenues Exclude Trackers
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8. Key Takeaways for 2013
NiSource: A Compelling Investment
• Sustainable long-term growth
– 2013 EPS guidance: $1.50 to $1.60 per share*
– Mid-point represents 6% growth over 2012 EPS
• Enhanced $1.8B capital investment program
• Deep, balanced infrastructure investment inventory across all
business units
• Balanced, transparent approach to funding capital requirements
• Unwavering commitment to investment-grade credit, strong liquidity
Solid Long-Term Trajectory to Grow Earnings, Increase Shareholder Value
* Net Operating Earnings Per Share from Continuing Operations (non-GAAP)
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9. Appendix
2012 Earnings
February 19, 2013

10. 2012 to 2013 Earnings Per Share (Non-GAAP)
2013 EPS Guidance Range $1.50 - $1.60*
$0.15 ($0.11)
$0.20 ($0.08) $1.50-$1.60*
($0.05) ($0.02)
$1.46
2012 Regulatory Growth Interest/Taxes/ 2010 Equity Administrative/ Insurance 2013
Actual Initiatives Initiatives Depreciation Forward Uncollectibles/ Guidance
Other
* Projected Net Operating Earnings from Continuing Operations (non-GAAP)
10

11. Capital Expenditures ($M)
2012 Actual & 2013 Forecasted CapEx
$1,815
$1,585 $28
$23
$698
$490
$423 $434
$649 $655
2012 2013
Gas Distribution Electric Gas Transmission and Storage Corporate
2013 Growth & Tracker ~$1,325M (73%) and Age & Condition ~$490M (27%)
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12. Capitalization ($M)
Total Debt to Capitalization 59.3% as of 12/31/12
Actual 12/31/2012 Actual 12/31/2011
Debt Equity Total Debt Equity Total
Long-Term Debt $ 6,819.1 $ - $ 6,819.1 $ 6,267.1 $ - $ 6,267.1
Short-Term Debt 543.6 - 543.6 1,127.7 - 1,127.7
Sale of A/R 233.3 - 233.3 231.7 - 231.7
Current Maturities 507.2 - 507.2 327.3 - 327.3
Common Equity - 5,554.3 5,554.3 - 4,997.3 4,997.3
Total Capitalization
$ 8,103.2 $ 5,554.3 $13,657.5 $ 7,953.8 $ 4,997.3 $12,951.1
Per Balance Sheet
% of Capitalization Per
Balance Sheet 59.3% 40.7% 100.0% 61.4% 38.6% 100.0%
12

13. Current Liquidity ($M)
Actual 12/31/12 Maturity
Committed Credit Facility $ 1,500 May 2017
Less:
Drawn on Credit Facility (44)
Commercial Paper (500)
Letters of Credit (18)
Add:
Cash & Equivalents 36
Net Available Liquidity $ 974
13

14. 2013 Sources & Uses ($M)*
$2,676 $2,676
$17
$48 $69
$121
$154 $304
$488
$1,050
$1,815
$1,286
2013 Sources 2013 Uses
FFO CapEx
LT Financing Maturities
ST Financing Dividends
Proceeds from Sale of Assets Working Capital
DRIP, 401(k) and ESPP Column3
Restricted Cash
* Projected
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15. NGD Infrastructure Investment Update
Modernize Infrastructure
($10B+ Opportunity) 3
8
Annual Investment
1 Columbia Gas of
Ohio $150M - $200M 20+ Years
Tracked: Execution of established Infrastructure Replacement Program (IRP); 2
annual tracker filings with 5-year program renewal (next renewal 2017) 7 9 10
Columbia Gas of 1
2 6
Pennsylvania $100M - $150M 20+ Years
Rate Case/Tracked: Execution of established Infrastructure Replacement
Program; current recovery utilizes forward test year rate case filings Complete
supplemented by periodic DSIC filings under Act 11 4
5 In Execution
Columbia Gas of
3
Massachusetts $25M - $50M 20+ Years In Development
Tracked: Execution of established Infrastructure Replacement Program; annual
tracker filings, program approved in 2009 and expanded in 2012 rate case In Evaluation
Columbia Gas of
4
Virginia $20M - $35M 20+ Years
Tracked: Execution of established Infrastructure Replacement Program; annual
tracker filings with 5-year program renewal (next renewal 2017) Current Regulatory Activity
Columbia Gas of
5
Kentucky $10M - $15M 20+ Years Columbia Gas of
Tracked: Execution of established Infrastructure Replacement Program with 8
Massachusetts
annual tracker filings Completed 2012 rate case in November. Order resulted in $8M annual
Columbia Gas of Revenue increase and enhancement of Infrastructure Program.
6
Maryland $5M - $10M 20+ Years Columbia Gas of Requested Filed: 9/2012
Rate Case/Tracked: Execution of established Infrastructure Replacement 9
Pennsylvania – Rate Case Increase: $77M Effective: 2Q/2013
Program; rate case filings with make whole filings for up to three subsequent First rate case filed under the new Act 11 legislation, case supports ongoing
years infrastructure program in PA with forward test year ending 2Q/2014. Reached
a unanimous settlement in principle in Feb. 2013 – expected to be filed with
7 NIPSCO - Gas TBD TBD
the PUC in March 2013.
Relatively modern gas system, with some opportunity for replacement of aging
infrastructure to improve reliability and system integrity (currently working to Columbia Gas of Requested Filed: 1/2013
10
establish DSIC type legislation under SB 560) Pennsylvania – DSIC Filing Tracker: ~$1M/Qtr Effective: 1Q/2013
Distribution System Improvement Charge (DSIC) filing to capture
infrastructure investments from the later part of 2012 15

16. Electric Operations Infrastructure Investment Update
Upgrade Generation Fleet 5,6
($700M - $1.4B Opportunity) 5,6 3,4
3,4 2
1 U14/15 FGDs ~$500M YE’13/YE‘14
Environmental: ECRM (Environmental Cost Recovery
Mechanism)Tracked FGD (Flue Gas Desulfurization) facilities at Schahfer 3,4
Generating Station 5,6 1
2 U12 FGD ~$240M YE’15
Environmental: ECRM Tracked FGD facilities at Michigan City Generating 7
Station
3 NOx Upgrades ~$50M YE’15
Environmental: ECRM Tracked NOx upgrades and monitoring 8
4 MATS $30M - $65M YE’13/YE’14/YE’15 Complete
Environmental: ECRM Tracked projects enhancing mercury and
particulate controls at all coal plants In Execution
5 Water Treatment $25M - $100M YE’17/YE’18
In Development
Environmental: S.B. 251 Tracked projects enhancing wastewater
treatment at all coal plants and water intake modifications at Bailly Station In Evaluation
6 Fly Ash
Improvements $100M - $300M TBD
Environmental: S.B. 251 Tracked projects upgrading ash handling and
disposal at all coal plants
Enhance Transmission System
Modernize Infrastructure ($500M - $1.0B Opportunity)
($3B - $4B Opportunity)
7 Reynolds-Topeka $250M - $300M Later part of Decade
MISO MVP: FERC approved 345Kv transmission project from Reynolds
NIPSCO Electric Substation to Hiple Substation (100 miles) – final route not determined
TBD TBD
Distribution Modernization
Systematic replacement of aging infrastructure to improve reliability Transmission $300M - 400M
8
and system integrity (currently working to establish DSIC type Project II (NI: $150M – $200M) Later part of Decade
legislation under SB 560) MISO MVP – partnership: FERC approved 765Kv transmission project
from Reynolds Substation to Greentown Substation (66 miles) – final
route not determined 16

17. NGT&S Regulated Pipeline & Storage Growth Update
$3B-$4B Opportunity
1 Line WB $14M 2Q ’12
Marcellus: Compression – between Loudon, VA & Leach, KY (175 MMcf/Day)
2 Smithfield $14M 2Q ’12
Marcellus: Pipeline and compression modifications – near Smithfield, WV &
Waynesburg, PA (150 MMcf/Day)
4
3 Rimersburg $8M 2Q ’12
Marcellus: Pipeline expansion – North Central PA (19 MMcf/Day)
3
4 Millennium ~$85M (NI: $40M) 2Q ’13 8
Marcellus: Deliver Marcellus supplies to multiple markets with expanded
Complete
7
compression at Minisink (150 MMcf/Day) and Hancock(150 MMcf/Day)
2 In Execution
5 Warren County $35M 2Q ’14 5 9
Gas Generation: Expansion to serve Virginia Power’s new 1,300 MW plant (250 In Development
MMcf/Day) 6
1
6 West Side $200M 4Q ’14
In Evaluation
Marcellus: Transport supply to growing Southeast Markets (~500 MMcf/Day)
7 East Side ~$210M 3Q ’15
Marcellus: Connect northern Marcellus supplies to Northeast and Mid-Atlantic
Markets (~300 MMcf/Day)
8 Quick Link ~$300M 2Q ’16
Utica: ~90 Miles of processed gas transportation in East Ohio (~500 MMcf/Day)
$4B-$5B Opportunity
9 LNG Exports $200M - +$1B 2017+
Marcellus/Utica: Aggregate and deliver supplies to LNG export terminals on Columbia Gas Modernization $300M/Yr Starting ‘13
Atlantic and Gulf Coasts (400 MMcf/Day to 1.6 Bcf/Day)
FERC approved (1/2013) - 5 Year settlement agreement (with
potential extension provisions) to begin a systematic infrastructure
replacement program
9
17

18. NGT&S Midstream & Minerals Growth Update
$1B-$1.5B Opportunity
10 Majorsville $85M 3Q ’10
Marcellus: Gather wet Marcellus gas to processing facility
and provide downstream pipeline market access with
additional pipeline and compression assets
(325 MMcf/Day)
13
12
11 Big Pine 14
Gathering $160M 2Q ’13 11 Complete
Marcellus: ~70 Miles of Pipeline with multiple interstate 10
connections (425 MMcf/Day) In Execution
12 Pennant JV In Development
Phase I $300M (NI = $150M) 2H ’13
Utica: ~50 Miles of Pipeline (400 MMcf/Day) and an NGL In Evaluation
processing facility (200 MMcf/Day)
13
Pennant JV
$300M (NI = $150M) TBD
Phase II
Utica: Pipeline Extension and Additional Processing
Self-Funded Investment
Utica Minerals Drilling Started
14
Arrangement 2H ‘12
Utica: Joint development with Hilcorp to extract value
of ~100k acres of mineral rights – acreage dedicated to
Pennant
Potential Minerals
Opportunities Under Evaluation
Utica: Optimize minerals position in shale region to
leverage downstream infrastructure opportunities
18

19. Key Path Forward 2012 1Q13 2Q13 3Q13 4Q13 1Q14 2Q14 3Q14 4Q14
Markers Completed

Equity Issuance: $400M
(Issued 24M Shares)
Liquidity

LT Debt
Issuances: $500M & $250M(6/2012)
Maturities: $420M(3/2013) & $500M(7/2014)
DRIP: ~$45M/year

Distribution
Columbia Gas of MA – Rate Case
Gas
Columbia Gas of PA – Rate Case
(Settlement / Effective)
Infrastructure Replacement Programs
(~$350M/year)
NIPSCO – FGD’s: U14, U15, U12
(Construction/FGD U14 In-Service )
Electric
Infrastructure Replacement Program (IN - SB560)
(Introduction / Legislative Session Ends)
MISO Transmission Improvement Project
(Engineering / Planning / Construction)
Line WB Expansion
(In-Service) 
Rimersburg Expansion
(In-Service) 
Smithfield Project
(In-Service) 
Utica Minerals Arrangement
(Agreement / Execution) 
Pennant JV – Phase I
(Agreement / In-Service)
GT&S
Big Pine Gathering
(In-Service)
VEPCO Power Plant Transportation Project
(In-Service)
Millennium Pipeline – Minisink & Hancock Expanded
Compression (In-Service)
Columbia Gas Modernization
(FERC Approval / Execution)
West Side Expansion
(In-Service)
East Side Expansion
(In-Service 3Q 2015)