Exhibit 12.1

Northwest Pipeline Corporation Computation of Ratio of Earnings to Fixed Charges
(Dollars in Millions)

											For the		For the
											Six Months		Six Months
											Ended		Ended
	For the Year Ended December 31,										June 30,		June 30,
	2001		2002		2003		2004		2005		2005		2006
Earnings:
Income before income taxes	$	107,173	$	129,381	$	117,812	$	123,434	$	111,949	$	57,045	$	52,285
Add:
Interest on long-term debt		25,670		25,577		37,144		38,721		38,164		19,223		19,189
Other interest expense		5,302		2,688		3,388		3,368		3,389		1,715		1,913
Rental expense representative of interest factor		2,020		1,783		1,350		1,002		854		446		367
Total earnings, as adjusted, plus fixed charges	$	140,165	$	159,429	$	159,694	$	166,525	$	154,356	$	78,429	$	73,754
Fixed Charges:
Interest expense on long-term debt	$	25,670	$	25,577	$	37,144	$	38,721	$	38,164	$	19,223	$	19,189
Other interest expense		5,302		2,688		3,388		3,368		3,389		1,715		1,913
Rental expense representative of interest factor		2,020		1,783		1,350		1,002		854		446		367
Total fixed charges	$	32,992	$	30,048	$	41,882	$	43,091	$	42,407	$	21,384	$	21,469
Ratio of earnings to fixed charges		4.25		5.31		3.81		3.86		3.64		3.67		3.44

For the purposes of this ratio (i) earnings consist of income before fixed charges and income taxes for the Company, and (ii) fixed charges consist of interest and debt expense on all indebtedness (without reduction for interest capitalized) and that portion of rental payments on operating leases estimated to represent an interest factor for the Company.