EXHIBIT 12 CASCADE NATURAL GAS CORPORATION AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED DIVIDEND REQUIREMENTS Twelve Months Ended June 30 Year Ended December 31 ------------------ --------------------------------------- 1994 1993 1993 1992 1991 1990 1989 ------ ------ ------ ------ ------ ------ ------ (dollars in thousands) Fixed charges, as defined: Interest expense 7,187 7,337 7,038 7,478 7,793 8,374 8,063 Amortization of debt issuance expense 579 506 562 402 362 373 370 ------- ------- ------- ------- ------- ------- ------- Total fixed charges 7,766 7,843 7,600 7,880 8,155 8,747 8,433 ------- ------- ------- ------- ------- ------- ------- Earnings, as defined: Net earnings 6,711 8,063 9,103 4,843 7,651 8,376 8,482 Add (deduct): Income taxes 3,946 4,698 5,224 2,817 4,206 4,547 5,178 Cumulative effect of change in accounting method - (209) (209) - - - - Fixed charges 7,766 7,843 7,600 7,880 8,155 8,747 8,433 ------- ------- ------- ------- ------- ------- ------- Total earnings 18,423 20,395 21,718 15,540 20,012 21,670 22,093 ------- ------- ------- ------- ------- ------- ------- Ratio of earnings to fixed charges 2.37 2.60 2.86 1.97 2.45 2.48 2.62 ======= ======= ======= ======= ======= ======= ======= Fixed charges and preferred dividend requirements: Fixed charges 7,766 7,843 7,600 7,880 8,155 8,747 8,433 Preferred dividend requirements 902 934 913 941 229 238 287 ------- ------- ------- ------- ------- ------- ------- Total 8,668 8,777 8,513 8,821 8,384 8,985 8,720 ------- ------- ------- ------- ------- ------- ------- Ratio of earnings to fixed charges and preferred dividend requirements 2.13 2.32 2.55 1.76 2.39 2.41 2.53 ======= ======= ======= ======= ======= ======= =======