Pipeline Transportation Service Companies
| Northern Natural Gas Co (Skellytown, TX)
Primarily Serving: Amarillo, TX - Lubbock, TX - Lawton, OK - Wichita Falls, TX |
| Northern Natural Gas Co (Omaha, NE)
Primarily Serving: Bellevue, NE - Council Bluffs, IA - Lincoln, NE - Sioux City, IA |
| Northern Natural Gas Co (Palmyra, NE)
Primarily Serving: Lincoln, NE - Bellevue, NE - Omaha, NE - Council Bluffs, IA |
| Northern Natural Gas Co (Minooka, IL)
Primarily Serving: Joliet, IL - Bolingbrook, IL - Aurora, IL - Naperville, IL |
| Northern Natural Gas Co (Bellevue, NE)
Primarily Serving: Council Bluffs, IA - Omaha, NE - Lincoln, NE - Sioux City, IA |
| Northern Natural Gas Co (Welcome, MN)
Primarily Serving: Lakeville, MN - Burnsville, MN - Eden Prairie, MN - Minnetonka, MN |
| Northern Pipeline Construction (Peoria, AZ)
Primarily Serving: Glendale, AZ - Surprise, AZ - Phoenix, AZ - Avondale, AZ |
| Norwich Petroleum Corp (Oklahoma City, OK)
Primarily Serving: Edmond, OK - Norman, OK - Lawton, OK - Cleveland, OK |
| Oasis Pipe Line Co (Prairie Lea, TX)
Primarily Serving: San Marcos, TX - New Braunfels, TX - Austin, TX - San Antonio, TX |
| Oasis Prairie Lea Compressor (Prairie Lea, TX)
Primarily Serving: San Marcos, TX - New Braunfels, TX - Austin, TX - San Antonio, TX |
| Ohio Oil Gathering Corp (Killbuck, OH)
Primarily Serving: Canton, OH - Akron, OH - Cuyahoga Falls, OH - Columbus, OH |
| Olympic Pipeline Co (Rainier, WA)
Primarily Serving: Graham, WA - Lakewood, WA - Tacoma, WA - Federal Way, WA |
| Olympic Pipeline Co (Mount Vernon, WA)
Primarily Serving: Bellingham, WA - Everett, WA - Redmond, WA - Bellevue, WA |
| Oneok Partners Lp (Tulsa, OK)
Primarily Serving: Broken Arrow, OK - Cleveland, OK - Canadian, OK - Edmond, OK |
| Oneok Texas Field Svc (Lefors, TX)
Primarily Serving: Amarillo, TX - Lubbock, TX - Lawton, OK - Wichita Falls, TX |
| Orange Pipelines (Reedley, CA)
Primarily Serving: Clovis, CA - Visalia, CA - Fresno, CA - Hanford, CA |
| Orion Pipeline Llc (Tyler, TX)
Primarily Serving: Longview, TX - Jefferson, TX - Mesquite, TX - Rowlett, TX |
| Osrwss (Kyle, SD)
Primarily Serving: Rapid City, SD - Cheyenne, WY - Casper, WY - Bismarck, ND |
| Ozark Gas Pipeline Corp (Fort Smith, AR)
Primarily Serving: Fayetteville, AR - Springdale, AR - Rogers, AR - Canadian, OK |
| P & F Svc (Kemmerer, WY)
Primarily Serving: Ogden, UT - Layton, UT - Salt Lake City, UT - Sandy, UT |
| P G & E Gas Transmission Texas (Highlands, TX)
Primarily Serving: Baytown, TX - Pasadena, TX - Houston, TX - League City, TX |
| Paisano Transmission Co (Three Rivers, TX)
Primarily Serving: San Antonio, TX - Corpus Christi, TX - Victoria, TX - New Braunfels, TX |
| Panhandle Eastern Pipeline Co (Maumee, OH)
Primarily Serving: Toledo, OH - Ann Arbor, MI - Taylor, MI - Canton, MI |
| Panhandle Eastern Pipeline Co (Peoria, IL)
Primarily Serving: Normal, IL - Bloomington, IL - Springfield, IL - Decatur, IL |
| Peabody Natural Gas Llc (Golden, CO)
Primarily Serving: Arvada, CO - Westminster, CO - Broomfield, CO - Denver, CO |
