Mark Thies
Analyst · Paul Ridzon with KeyBanc
Thank you, Scott, and good morning, everyone. For 2011, utility earnings contributed $1.56 per diluted share, an increase of $0.01 from $1.55 last year, primarily as a result of increased gross margin. Net income from our utility operations increased $4.2 million in 2011 as compared to 2010 and the increase in earnings per share contribution was limited by dilution from common stock issuances.
Our utility earnings for 2011 were positively impacted by an increase in gross margin primarily due to higher retail loads caused by colder weather during the first quarter and power supply costs below the amount included in base retail rates as well as general rate increases. The increase in gross margin was partially offset by an increase in other operating expenses, depreciation and amortization and taxes other than income tax.
For the fourth quarter of 2011, our utility operations contributed $0.38 per diluted share compared to $0.45 in 2010. The decrease in the quarterly net income was primarily due to a decrease in gross margin as well as an increase in depreciation and amortization and taxes other than income tax. The decrease in gross margin was primarily due to the timing of the recognition of the Energy Recovery Mechanism in Washington, as we recognized most of the benefit under the ERM in the first 9 months of 2011.
And in the fourth quarter of 2011, we recognized just $0.7 million under the Energy Recovery Mechanism. As part of the rate case settlement, in 2010, there were no deferrals under the ERM and allowable costs for the Lancaster plant were limited to $6.8 million. But during the fourth quarter of 2010, our power supply costs were $8.4 million below the level included in base retail rates in Washington.
As a result of better-than-expected hydroelectric generation and purchased power and natural gas fuel costs below the amount included in base rates, we recognized $6.4 million of benefit under the Energy Recovery Mechanism in Washington in 2011. For 2010, our power supply costs were $7.1 million below the level included in base rates in Washington.
Avista's share of Ecova net income for 2011 increased as compared to last year, as Scott mentioned, with an earnings contribution of $9.7 million compared to $7.4 million in the prior year. On a quarterly basis, Ecova's share -- or Avista's share of Ecova's net income was $2.7 million for the fourth quarter, an increase from $1.5 million last year.
Revenues for 2011 increased $35.8 million as compared to last year and totaled $138 million. Ecova's organic revenue growth was approximately 13% from 2010 to 2011. In December of 2011, Ecova expanded its committed line of credit from -- to $60 million from $40 million. Ecova may further expand this facility in 2012. There were $35 million of borrowings outstanding under Ecova's credit agreement at December 31.
The $80 million of total net cash paid for the November 2011 acquisition of Prenova and the January 2012 acquisition of LPB Energy Management, was funded by Ecova through borrowings under its committed credit agreement, a $20 million equity infusion from certain existing shareholders and available cash.
Earnings from our other businesses were slightly negative for 2011, but the positive side, earnings from METALfx manufacturing business in California was $1.4 million, up from $0.8 million in 2010. Our losses on investments were $0.5 million in '11, compared to $3.3 million in 2010. And the loss for 2010 included a $2.2 million impairment of our investment in a fuel cell business.
As of December 31, we had $310 million of available liquidity under our $400 million committed line of credit, with $61 million of cash borrowings and $29 million of letters of credit outstanding. In December, this facility was amended to extend the expiration date to February 2017 and to improve the pricing terms. You'll recall, we first entered into this agreement in February of 2011.
In December 2011, we also issued $85 million of 4.45% First Mortgage Bonds due in 2041, with certain institutional investors in the private placement market. The net proceeds from the sale of bonds were used to repay a portion of borrowings outstanding under our $400 million credit agreement. We expect to issue up to $100 million of long-term debt in 2012.
Also in 2011, we issued $26.5 million of common stock, including $19.5 million under our sales agency agreement. We expect to issue up to $45 million of common stock in 2012 to maintain an appropriate capital structure. We have about 200,000 shares available to be issued under the current sales agency agreement, and we expect to expand this agreement for a significant portion of our 2012 common stock issuances.
We contributed $26 million to our pension plan and the pension plan funding deficit increased significantly in 2011, primarily due to a decrease in the discount rate used in determining the benefit obligation. We expect to contribute a total of $176 million or $44 million per year to the pension plan in the period 2012 through 2015. We are confirming our 2012 guidance for the consolidated earnings to be in the range of a $1.65 to $1.85 per diluted share.
We expect Avista Utilities to contribute in the range of $1.51 to $1.66 per diluted share for 2012. We expect our 2012 utility earnings to be positively impacted by the general rate increases, and we expect them to be limited by slow load growth due to a weak economy as Scott mentioned, a delay in the recovery of capital investments and operating expenses as well as increased operating costs including pensions and other post-retirement benefit costs.
Our range for Avista Utilities encompasses expected variability in power supply cost in the application of the ERM to that variability. The midpoint of our utility guidance range does not include any benefit or expense under the ERM. However, we are expecting a benefit under the ERM in 2012 within the 90% customer, 10% company sharing band.
It is important to note that the forecast of our position in the ERM can vary significantly due to a variety of factors, including low level of hydroelectric generation and retail loads as well as changes in purchased power and natural gas fuel prices. Our outlook for Avista Utilities assumes among other variables, normal precipitation, temperatures and hydroelectric generation.
For 2012, we expect Ecova to contribute in the range of $0.16 to $0.19 per diluted share, and other businesses to be between a breakeven and a loss of $0.02 per diluted share. I will now turn the call back over to Jason.