Sierra Pacific Industries owns and manages about 2 million acres of timberland in California and Washington. Through its network of sawmills the company produces millwork, lumber, and wood fiber products, fencing, aluminum-clad and wood patio doors, and windows. SPI also operates cogeneration plants that recycle wood waste into electricity for its plants; excess electricity is sold to local energy service providers. In addition to the timber business, the company is involved in residential and commercial real estate. SPI traces its roots to the late 1920s when it was founded by R. H. "Curly" Emmerson. The Emmerson family continues to own and operate SPI.
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