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KOIN Center is a multi-purpose skyscraper in Portland, Oregon. At a height of 509 feet, it is Portland's third tallest building. It was designed by the firm of Zimmer Gunsul Frasca Partnership and opened in 1984. Photo by J. Todd Copyright 2009 - Oregon Interactive Corporation No portion of this content may be repurposed, reproduced or published by any entity without the express, written permission of Oregon Interactive Corporation.