EXHIBIT 21.1

BOARDWALK PIPELINE PARTNERS, LP

Subsidiaries of the Registrant

December 31, 2011

Name of Subsidiary	Organized Under Laws of	Business Names
Boardwalk Operating GP, LLC	Delaware
Boardwalk Pipelines, LP	Delaware
Texas Gas Transmission, LLC	Delaware	Texas Gas
Gulf South Pipeline Company, LP	Delaware	Gulf South
GS Pipeline Company, LLC	Delaware
Gulf Crossing Pipeline Company LLC	Delaware	Gulf Crossing
Boardwalk Midstream, LP	Delaware
Boardwalk Field Services, LLC	Delaware	Field Services