Exhibit 12

GAS TRANSMISSION NORTHWEST CORPORATION

RATIO OF EARNINGS TO FIXED CHARGES

	2003		2002		2001		2000		1999
	(Dollars in Millions)
Earnings
Income from Continuing Operations	$	53.9	$	79.0	$	76.4	$	58.4	$	61.5
Adjustments:
Income taxes		34.9		43.7		34.5		37.4		37.6
Fixed charges (as below)		39.9		38.9		38.0		40.9		42.8
Total adjusted earnings	$	128.7	$	161.6	$	148.9	$	136.7	$	141.9
Fixed charges:
Net interest expense	$	39.2	$	35.2	$	37.0	$	40.4	$	41.7
Adjustments:
Interest component of rents		0.3		0.4		0.3		0.1		0.0
AFUDC debt		0.4		3.3		0.7		0.4		1.1
Total fixed charges	$	39.9	$	38.9	$	38.0	$	40.9	$	42.8
Ratio of earnings to fixed charges		3.2		4.2		3.9		3.3		3.3