Wind turbine, 100 feet tall, on horizon for Cottage Grove

A Cottage Grove resident is planning to generate his own electricity -- and then some.

January 22, 2010 at 5:41PM

At about this time next year, when another brisk Alberta clipper sails down from Canada to spike fresh chill in the wintry air, John Kooyman expects to be basking in a windfall.

Over objections of a neighbor, Kooyman won approval from the Cottage Grove City Council this month to install a residential wind turbine on his 5-acre lot on the city's western edge.

The turbine, which will produce about double what his home needs for electricity, will be 100 feet tall, with three 13-foot blades. By comparison, that 113-foot total height is slightly taller than the 103-foot turbine on the campus of Macalester College. Both are dwarfed by the 166-foot model installed at the headquarters of Great River Energy's company headquarters in Maple Grove. And the giant wind turbines at Xcel Energy Co.'s Grand Meadow wind farm top 250 feet, with 122-foot blades.

Kooyman studied Macalester's turbine carefully before going ahead.

"Actually, my father-in-law was the one who got me interested in this -- he's kind of a forward-thinker," Kooyman said. He expects to start laying the foundation for the Canadian-built turbine this spring, and have it going by summer.

"I think more and more people are thinking about sustainable resources and cutting back on their energy use," Kooyman said. "We're realizing that less pollution is a better thing."

At the same time, he added, "I'm no eco-angel -- maybe about a tenth of the light bulbs in my house are the [compact flourescents]. I have an old truck that gets maybe 13 miles to the gallon. I do a lot of bad things, but this will hopefully offset that."

A study of his property found the wind speed averages about 13 1/2 miles per hour, Kooyman said. Once the wind speed hits 12 mph, the 10-kilowatt turbine reaches its full capacity. That yields an estimated 24,000 kilowatts a year, which Kooyman figures is about twice the amount he needs for his home. The leftover electricity will be sold back to Xcel Energy Co.

Kooyman isn't looking to make a financial killing -- "I'm hoping to do OK," he said -- and estimates the turbine will take about 13 years to pay for itself. It's expected to operate for 30 years.

John Bailey, of Bailey's Nurseries, told both the city's Planning Commission and City Council that he fears the structure, and the swooshing noise it produces, will scare developers from two parcels of land the company owns north of Kooyman's property. There is no nursery stock on the land, and the company would like to sell the property.

The 40- and 20-acre plots are zoned as agricultural, but Cottage Grove's comprehensive plan envisions low-density residential sites for development -- about three houses per acre.

Tyler Hanson, an engineer with Cedar Creek Energy, a Coon Rapids renewable energy company that developed Kooyman's project, said residential wind turbines are gaining popularity in areas where the towers are feasible. In Kooyman's case, the open acreage, elevation and distance from neighbors made it ideal.

The swooshing noise from the blades, he added, would rarely reach the maximum of 52 decibels (equivalent to light traffic from 100 feet away) in a sustained wind of about 25 mph. In severe winds, the turbine can simply be shut off, Hanson added.

Kooyman said he understands Bailey's concerns about potential harm to his property value, but is confident they will be allayed with time. As far as noise is concerned, he is not worried, adding: "I'll be the closest resident" living near the turbine.

Ryan Schroeder, Cottage Grove's city administrator, said the turbine's approval fits with the city's goal of being out front on environmental issues. Cottage Grove was the first metro-area city, for example, to take an inventory of environmentally sensitive areas.

The effects of Kooyman's turbine may offer a guide for future decisions on similar projects, he said, though none are in the works.

"We're kind of looking forward to evaluating whether it's benign or not," Schroeder said.

Jim Anderson • 612-673-7199

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Jim Anderson

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