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Docomomo US/WEWA, promoting modern architecture and design, incorporates in Washington on September 7, 2004.

On September 7, 2004, an organization called Docomomo US/WEWA, dedicated to documenting and conserving buildings, sites, and neighborhoods constructed as part of the modern movement, incorporates as a...

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Washington's First State Parks: Larrabee and the Jackson House

When shipbuilder and former Seattle Mayor Robert Moran offered to donate a vast tract of land on Orcas Island to the State of Washington around 1910, it was thought that Washington's first state park ...

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President Richard M. Nixon signs Executive Order 11670, returning the eastern slopes of Mount Adams to the Yakama Nation, on May 20, 1972.  

On May 20, 1972, President Richard M. Nixon (1913-1994) signs Executive Order 11670, which directs the Secretary of Interior to assume jurisdiction over a 21,000-acre tract of land in the Gifford Pinc...

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Okanogan terrane docks against North American continent 100 million years ago.

About 100 million years ago, in the late Mesozoic Era, the Okanogan terrane (microcontinent) docks against the North American continent. This collision adds to the land mass of North America and exten...

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Vashon glacier begins to melt and recede from Puget Sound region and Columbia Basin around 16,900 years ago.

About 16,900 years ago, the Vashon glacier begins to melt and recede from lands that will come to be known as the Puget Sound region and the Columbia Basin region. By 15,000 years ago, the glacier has...

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Salmon colonize the Puget lowland about 14,900 years ago.

Beginning about 14,900 years ago, salmon begin to colonize Puget Sound. During the last ice age, when a 3,000-foot-thick glacier moved out of Canada and traveled as far south as Olympia, no salmon, or...

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Modern plant communities in the Puget lowland begin to thrive around 7,000 years ago.

Beginning about 7,000 years ago, the climate become more like the modern era, relatively wetter and cooler than in the previous 3,000 years. With this change the ecosystems of the Puget lowland began ...

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Osceola Mudflow from Mount Rainier inundates the White River Valley approximately 5,600 years ago.

Approximately 5,600 years ago, a massive landslide removes .7 cubic miles of earth from the summit of Mount Rainier. The ensuing mudflow, which spreads as far as modern-day Kent, is called the Osceola...

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Landslide blocks the Columbia River in about 1450.

In about 1450, an immense landslide tumbles off Table Mountain in Skamania County and completely blocks the Columbia River, shoving it a mile off course. A lake forms behind the dam extending as far a...

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The Strait of Juan de Fuca is mentioned for the first time in April 1596.

In April 1596, English merchant Michael Lok and Apostolos Valerianos, a Greek pilot and mariner, meet in Venice to discuss a voyage that Valerianos had taken in 1592. The mariner, who was better known...

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Earthquake of enormous magnitude hits the Pacific Northwest coast on January 26, 1700.

On January 26, 1700, at about 9:00 p.m. Pacific Standard Time a gigantic earthquake occurs 60 to 70 miles off the Pacific Northwest coast. The quake violently shakes the ground for three to five minut...

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European horses arrive on the Columbia plateau in the early 1700s.

In the early 1700s, European horses arrive on the Columbian plateau, having moved north through tribal trade networks from Pueblo villages located in present-day New Mexico. The Plateau tribes, who fo...

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