EXHIBIT 12

NORTHWEST PIPELINE GP
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(Thousands of Dollars)

	Years Ended December 31,
	2008		2007		2006		2005		2004
Earnings:
Income before income taxes	$	155,371	$	185,059	$	85,668	$	107,653	$	119,138
Add:
Fixed charges:
Interest on long-term debt		42,290		46,828		43,649		38,164		38,721
Other interest expense		5,571		5,585		3,824		3,389		3,368
Rental expense representative of interest factor		334		521		693		854		1,002
Total fixed charges		48,195		52,934		48,166		42,407		43,091
Total earnings as adjusted	$	203,566	$	237,993	$	133,834	$	150,060	$	162,229
Fixed charges	$	48,195	$	52,934	$	48,166	$	42,407	$	43,091
Ratio of earnings to fixed charges		4.22		4.50		2.78		3.54		3.76