Company:  NISOURCE INC/DE (NI)
Form Type:  10-K
Filing Date:  2/27/2009 
CIK:  0001111711 
Address:  801 EAST 86TH AVE 
City, State, Zip:  MERRILLVILLE, Indiana 46410-6272 
Telephone:  (219) 647-5200 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$13.74  
Change: 
-0.06 (-0.44%)  
Trade Time: 
Nov 20  
Market Cap: 
$3.79B
Description of Business
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  FORM 10-K
    PART I
      ITEM 1. BUSINESS
      ITEM 1A. RISK FACTORS
      ITEM 1B. UNRESOLVED STAFF COMMENTS
      ITEM 2. PROPERTIES
      ITEM 3. LEGAL PROCEEDINGS
      ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
        NAME AND TITLE
    PART II
      ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED ...
      ITEM 6. SELECTED FINANCIAL DATA
      ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
      ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
        REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
        REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
        INCOME STATEMENT
        BALANCE SHEET
        BALANCE SHEET
        CASH FLOW
        STOCKHOLDERS EQUITY
        STOCKHOLDERS EQUITY
        BALANCE SHEET
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        BALANCE SHEET
        BALANCE SHEET
        BALANCE SHEET
      ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ...
      ITEM 9A. CONTROLS AND PROCEDURES
      ITEM 9B. OTHER INFORMATION
    PART III
      ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
      ITEM 11. EXECUTIVE COMPENSATION
      ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND ...
      ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND ...
      ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES
    PART IV
      ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES
    SIGNATURES
    EXHIBIT INDEX
  EXHIBIT 10.1
  EXHIBIT 10.2
  EXHIBIT 10.3
  EXHIBIT 10.10
  EXHIBIT 10.12
  EXHIBIT 10.13
  EXHIBIT 10.17
  EXHIBIT 10.22
  EXHIBIT 10.23
  EXHIBIT 10.24
  EXHIBIT 10.28
  EXHIBIT 10.30
  EXHIBIT 12
  EXHIBIT 21
    SUBSIDIARIES
  EXHIBIT 23
    CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
  EXHIBIT 31.1
    Certification Pursuant to
  EXHIBIT 31.2
    Certification Pursuant to
  EXHIBIT 32.1
    Certification Pursuant to
  EXHIBIT 32.2
    Certification Pursuant to