Complex sentence: After spending several years near the Ballard Locks, "Surveyor" was moved to the Tyee Marina in Commencement Bay at Tacoma, Washington, where she remained as of April 2015, apparently serving as a windbreak for the marina under the designation "OSS 2".
Split into simpler sentences: After spending several years near the Ballard Locks, she was moved to the Tyee Marina in Commencement Bay, Tacoma, Washington where she remains as of April 2015. She appears to be serving as a windbreak for the marina under the designation "OSS 2".