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SEC Edgar

NORTHERN ILLINOIS GAS CO /IL/ /NEW/

SIC 4922 · Natural Gas Transmission
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NORTHERN ILLINOIS GAS CO /IL/ /NEW/

CIK:0000110104|SEC Filings

INDENTURES

EX-4.12
supplementalindent012511.htm
Feb 24, 2011
EX-4.01
supplementalindent072309.htm
Jul 31, 2009
EX-4.11
c49594exv4w11.htm
Feb 25, 2009
EX-4.01
supplementalindenture.htm
Nov 3, 2008
EX-4.11
supplemental_indenture.htm
Feb 23, 2007
EX-4.18
dex418.txt
Jul 20, 2001
EX-4.19
dex419.txt
Jul 20, 2001
EX-4.17
0003.txt
Mar 12, 2001
EX-4.19
EX-4.19.txt
Mar 19, 1999
EX-4.19
EX-4.19.txt
Dec 17, 1998
EX-4.01
EX-4.01.txt
Aug 12, 1998
EX-4.19
EX-4.19.txt
Mar 26, 1998
EX-4.20
EX-4.20.txt
Dec 18, 1997
EX-4.01
EX-4.01.txt
Nov 13, 1997
EX-4.01
EX-4.01.txt
Aug 8, 1997