Mortenson Construction says 2012 was its best year for wind-farm construction, cementing its position as the nation's No. 1 wind energy contractor.
The Golden Valley-based company's U.S. wind energy group erected about 1,200 turbines at 21 wind projects in eight states, the company said. That's an 83 percent increase, based on total output, compared with 2011.
The boom, and a coming slowdown, result from the U.S. government's stop-and-go incentives for wind power. Last year, wind developers pushed contractors to complete projects before a tax credit expired on Dec. 31. But turbine manufacturers cut back, fearing slack business in 2013.
Tim Maag, vice president and general manager for Mortenson's U.S. wind energy group, said he is pleased that Congress extended the tax credit on Jan. 2. But he said wind farm construction probably will lag for a few months, then pick up later in the year.
"The supply chain for the turbine manufacturers has been severely disrupted by the lack of clarity and uncertainty," Maag said in an interview.
Since it entered the wind industry in 1995, Mortenson has built 124 projects across North America, including most of the wind power in Minnesota. Its latest wind farm was EDF Renewable Energy's Bobcat Bluff, serving about 45,000 households in Texas.
The trade journal Engineering News-Record in September named Mortenson the top U.S. wind farm contractor with $725 million in construction revenue for 2011-- more than twice that of its closest competitor. Mortenson also builds wind farms in Canada.
DAVID SHAFFER