EXHIBIT 12

GAS TRANSMISSION NORTHWEST CORPORATION

EXHIBIT 12 - RATIO OF EARNINGS TO FIXED CHARGES

($ in millions)

	For the Six Months Ended
Ratio of Earnings to Fixed Charges	June 30, 2004		June 30, 2003
Earnings
Net income	$	29.1	$	29.3
Adjustments:
Income taxes		18.5		19.0
Fixed charges (as below)		19.4		20.2
Total adjusted earnings	$	67.0	$	68.5
Fixed charges:
Net interest expense	$	19.0	$	19.8
Adjustments:
Interest component of rents		0.1		0.2
AFUDC debt		0.2		0.2
Total fixed charges	$	19.4	$	20.2
Ratio of earnings to fixed charges		3.5		3.4