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When a 2003-vintage wind farm in southwestern Minnesota became obsolete, its owner Allete Clean Energy tore it down and built anew. But there was one snag: Most of the blades
It's a problem the wind industry is grappling with as more turbines reach retirement.
Xcel and others are trying to recycle older turbine blades, but many are still thrown away as construction junk.
Mortenson Construction funds improvements.