History of Washington (state) result, the law went into effect on June 7, 2006. The Washington legislature introduced more advanced converge of domestic partnerships in 2008. History of Washington (state) The history of Washington includes thousands of years of Native American history before Europeans and Americans arrived and began to establish territorial claims. The region was part of Oregon Territory from 1848 to 1853, after which it was separated from Oregon and established as Washington Territory. In 1889, Washington became the 42nd state of the United States. Archaeological evidence shows that the Pacific Northwest was one of the first populated areas in North America.
Pacific, Washington from the Mud Mountain Dam caused even greater flooding, inundating more than a hundred homes. Pacific is located at (47.263272, -122.247831). According to the United States Census Bureau, the city has a total area of , of which, is land and is water. The lower White River, also known as the Stuck River, runs through the east side of Pacific, between Auburn, Washington and Sumner, Washington. As of the census of 2010, there were 6,606 people, 2,269 households, and 1,605 families residing in the city. The population density was . There were 2,422 housing units at an average density of