| Gas Distribution |
 |
Nicor Gas Service Territory |
 |
Major Gas Main |
 |
Underground Storage Field |
 |
Major Cities |
| Interstate Pipeline Transporters |
 |
Natural Gas Pipeline Company of America |
 |
Northern Natural Gas Company |
 |
Midwestern Gas Transmission Company |
 |
Panhandle Eastern Pipe Line Company |
 |
ANR Pipeline |
 |
Alliance Pipeline |
 |
Northern Border |
 |
Horizon |