Company:  NISOURCE INC/DE (NI)
Form Type:  10-Q
Filing Date:  5/1/2009 
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-Q
    PART I
      ITEM 1. FINANCIAL STATEMENTS
        BALANCE SHEET
        BALANCE SHEET
        CASH FLOW
        INCOME STATEMENT
        BALANCE SHEET
      ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
      ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
    PART II
      ITEM 1. LEGAL PROCEEDINGS
      ITEM 1A. RISK FACTORS
      ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF ...
      ITEM 3. DEFAULTS UPON SENIOR SECURITIES
      ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
      ITEM 5. OTHER INFORMATION
      ITEM 6. EXHIBITS
    SIGNATURE
  EXHIBIT 10.1
  EXHIBIT 10.2
  EXHIBIT 31.1
    Certification Pursuant to
  EXHIBIT 31.2
    Certification Pursuant to
  EXHIBIT 32.1
    Certification Pursuant to
  EXHIBIT 32.2
    Certification Pursuant to