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98-625: State Route 526 ( SR 526 ), also known as the Boeing Freeway , is a state highway in Snohomish County , Washington , United States. The east–west highway travels 4.52 miles (7.27 km) and connects SR 525 in Mukilteo to Interstate 5 (I-5) in southern Everett . The highway serves the Boeing Everett Factory and Paine Field ; it also serves as a main route to

196-511: A diamond interchange and Seaway Boulevard in a semi-directional T interchange , the main access roads to Paine Field and the Boeing factory, respectively, before widening to six lanes as it approaches its eastern terminus, an interchange with I-5 . The freeway travels through a diamond interchange with Evergreen Way, located east of a pedestrian bridge over SR 526 and south of Cascade High School , where traffic heading towards I-5 northbound on

294-467: A left directional exit and traffic heading towards I-5 southbound splits into two lanes, a normal lane and a high-occupancy vehicle lane (HOV lane). SR 526 continues east, briefly paralleling the Interurban Trail , before the freeway travels towards I-5 on flyover ramps and the highway terminates at the northern terminus of SR 99 and the northern terminus of SR 527 . Every year,

392-616: A temperate rainforest . Weeks may pass without a clear day. The western slopes of the Cascade Range receive some of the heaviest annual snowfall (in some places more than 200 inches or 5,100 millimeters water equivalent) in the country. In the rain shadow area east of the Cascades, the annual precipitation is only 6 inches (150 mm). Precipitation then increases again eastward toward the Rocky Mountains (about 120 miles (190 km) east of

490-501: A direct connection being built in 1995 to connect SR 526 to northbound I-5, which previously required the use of a loop ramp on SR 527 . Additional upgrades included a high-occupancy vehicle lane on southbound I-5, along with a corresponding queue ramp on SR 526, and the construction of sound walls along the freeway. Until 2000, SR 526 and 84th St. in Mukilteo was in a continuous alignment. When Paine Field Boulevard ( SR 525 Spur )

588-604: A factory in Everett for its 747 airliner. SR 526 begins as 84th Street Southwest at a signalized intersection with SR 525 , named the Mukilteo Speedway, at Nelsons Corner in Mukilteo . The highway travels east through a residential neighborhood, heading towards an intersection with Paine Field Boulevard, signed as SR 525 Spur , at the Future of Flight Aviation Center and Paine Field . SR 526 turns northeast as

686-606: A general speed limit of 25 mph (40 km/h), many only open to vehicles between the day after Labor Day and April 14, but state law places the beaches under the control of the Washington State Parks and Recreation Commission and only designates them as " public highways ". Most state routes are numbered in a grid, with even-numbered routes running east–west and odd-numbered routes running north–south. Even two-digit routes increase from south to north in three "strips", with SR 4 , SR 6 , and SR 8 in

784-470: A large part of the top of the volcano. The eruption flattened the forest up to 20 km north of the volcano , killed 57 people, flooded the Columbia River and its tributaries with ash and mud, and blanketed large parts of Washington eastward and other surrounding states in ash, making day look like night. Washington is the northwesternmost state of the contiguous United States . It borders Idaho to

882-631: A large region experiences strong rain shadow effects. Semi-arid conditions occur in much of Eastern Washington with the strongest rain shadow effects at the relatively low elevations of the central Columbia Plateau —especially the region just east of the Columbia River from about the Snake River to the Okanagan Highland . Thus, instead of rain forests, much of Eastern Washington is covered with dry grassland , shrub-steppe , and dunes . The average annual temperature ranges from 51 °F (11 °C) on

980-425: A low-pressure cyclone system takes over in the north Pacific Ocean. The air spiraling inward in a counter-clockwise fashion causes Washington's prevailing winds to come from the southwest, and bring cool and overcast weather and a predictably wet season . The term " Pineapple Express " is used colloquially to describe atmospheric river events, where repeated storm systems are directed by this persistent cyclone from

1078-455: A preliminary assessment of the risks and opportunities presented given the possibility of a rise in global temperatures and their effects on Washington state. Rainfall in Washington varies dramatically going from east to west. The Olympic Peninsula's western side receives as much as 160 inches (4,100 mm) of precipitation annually, making it the wettest area of the 48 conterminous states and

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1176-466: A proposal to use the name "State of Washington, Douglass Commonwealth", which would conflict with the current state of Washington. Residents of Washington (known as "Washingtonians") and the Pacific Northwest simply refer to the state as "Washington", and the nation's capital "Washington, D.C.", "the other Washington", or simply "D.C." The 9,300-year-old skeletal remains of Kennewick Man , one of

1274-504: A state; the creation of Idaho Territory in 1863 established the final eastern border. A Washington state constitution was drafted and ratified in 1878, but it was never officially adopted. Although never approved by the United States Congress, the 1878 constitution is an important historical document that shows the political thinking of the time; it was used extensively during the drafting of Washington state's 1889 constitution,

1372-583: A three-man commission ruling in favor of the United States in 1872. The border established by the Oregon Treaty and finalized by the arbitration in 1872 remains the boundary between Washington and British Columbia . The growing population of Oregon Territory north of the Columbia River formally requested a new territory. As a result of the Monticello Convention , held in present-day Cowlitz County ,

1470-439: A varied range of bird species. This range includes raptors, shorebirds, woodland birds, grassland birds, ducks, and others. There have also been a large number of species introduced to Washington, dating back to the early 18th century, including horses and burros. The channel catfish , lamprey , and sturgeon are among the 400 known freshwater fishes . Along with the Cascades frog, there are several forms of snakes that define

1568-476: A wagon road connecting Mukilteo to Lowell (now part of Everett) by the county government. SSH 1I was designated in 1937 along the route of Mukilteo Boulevard and a new highway connecting Mukilteo to U.S. Route 99 (US 99) in Lynnwood , traveling in a 10.63-mile (17.11 km) circular arc . SSH 1I was split into SR 525 from Lynnwood to Mukilteo and SR 526 from Mukilteo to Everett during

1666-482: Is an extremely important business throughout much of Eastern Washington, as the soil is highly productive and irrigation , aided by dams along the Columbia River, is fairly widespread. The spread of population in Eastern Washington is dominated by access to water, especially rivers. The main cities are all located alongside rivers or lakes; most of them are named after the river or lake they adjoin. Farther east,

1764-405: Is the only U.S. state named after a president. Confusion between the state of Washington and the city of Washington, D.C., led to renaming proposals during the statehood process for Washington in 1889, including David Dudley Field II 's suggestion to name the new state "Tacoma"; these proposals failed to garner support. Washington, D.C.'s, own statehood movement in the 21st century has included

1862-499: The Blue Mountains and the eastern sides of the Cascades. Mammals native to the state include the bat , black bear , bobcat , cougar , coyote , deer , elk , gray wolf , hare , moose , mountain beaver , muskrat , opossum , pocket gopher , rabbit , raccoon , river otter , skunk , and tree squirrel . Because of the wide range of geography, the state of Washington is home to several different ecoregions, which allow for

1960-435: The Blue Mountains . The state of Washington has a temperate climate. The eastern half of Washington has a semi-arid to warm-summer mediterranean climate , while the western side of Washington as well as the coastal areas of the state have a cool oceanic climate or warm-summer mediterranean climate. Major factors determining Washington's climate include the large semi-permanent low pressure and high pressure systems of

2058-532: The Canadian province of British Columbia to the north. Washington is part of a region known as the Pacific Northwest , a term which always refers to at least Washington and Oregon, and may or may not include some or all the following, depending on the user's intent: Idaho, western Montana , northern California , British Columbia, and Alaska . The high mountains of the Cascade Range run north-south, bisecting

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2156-559: The Cascade Mountains westward, Western Washington has a mostly Mediterranean climate , with mild temperatures and wet winters, autumns and springs, and relatively dry summers. The Cascade Range has several volcanoes , which reach altitudes significantly higher than the rest of the mountains. From north to south, these major volcanoes are Mount Baker , Glacier Peak , Mount Rainier , Mount St. Helens , and Mount Adams . All are active volcanoes. Mount Rainier—the tallest mountain in

2254-675: The Columbia District . Fur trapper James Sinclair , on orders from Sir George Simpson , Governor of the Hudson's Bay Company, led some 200 settlers from the Red River Colony west in 1841 to settle on Hudson Bay Company farms near Fort Vancouver . The party crossed the Rockies into the Columbia Valley , near present-day Radium Hot Springs , British Columbia, then traveled south-west down

2352-784: The Continental Divide to the Pacific Ocean as part of the Anglo–American Convention of 1818 , which established the 49th parallel as the international boundary west from Lake of the Woods to the Rocky Mountains . Resolution of the territorial and treaty issues west to the Pacific was deferred until a later time. In 1819, Spain ceded its rights north of the 42nd parallel to the United States. Negotiations with Great Britain over

2450-558: The Evergreen Point Bridge , Hood Canal Bridge , and Lake Washington Bridge . The Washington State Ferries , except the route to Sidney, British Columbia , were legally included in the state highway system in 1994; a new State Route 339 was created at that time for the passenger-only Seattle-Vashon Ferry . According to the Washington State Department of Licensing , ocean beaches are legally state highways with

2548-528: The Kootenai River and Columbia River. Despite such efforts, Britain eventually ceded all claims to land south of the 49th parallel to the United States in the Oregon Treaty on June 15, 1846. In 1836, a group of missionaries, including Marcus Whitman , established several missions and Whitman's own settlement Waiilatpu, in what is now southeastern Washington state, near present-day Walla Walla County , in

2646-595: The San Juan Islands is heavily inhabited by killer , gray, and humpback whales. In Eastern Washington, the flora is vastly different. Tumbleweeds and sagebrush dominate the landscape throughout large parts of the countryside. Russian olives and other trees are common alongside riverbanks; however, apart from the riversides, large swaths of Eastern Washington have no naturally existing trees at all (though many trees have been planted and are irrigated by people, of course). A wider variety of flora can be found in both

2744-792: The Santiago , part of a two-ship flotilla with the Sonora . He claimed the coastal lands up to Prince William Sound for Spain as part of their claimed rights under the Treaty of Tordesillas , which they maintained made the Pacific a "Spanish lake" and all its shores part of the Spanish Empire. Soon thereafter, the smallpox epidemic of the 1770s devastated the Native American population. In 1778, British explorer Captain James Cook sighted Cape Flattery , at

2842-547: The State of Washington , is a state in the Pacific Northwest region of the United States. It is often referred to as Washington state to distinguish it from the national capital , both named after George Washington (the first U.S. president ). Washington borders the Pacific Ocean to the west, Oregon to the south, Idaho to the east, and shares an international border with the Canadian province of British Columbia to

2940-463: The U.S. Congress passed legislation to create Washington Territory . It was signed into law by President Millard Fillmore on March 2, 1853. The boundary of Washington Territory initially extended farther east than the present state, including what is now the Idaho Panhandle and parts of western Montana, and picked up more land to the southeast that was left behind when Oregon was admitted as

3038-601: The United States Congress during the creation of Washington Territory in 1853; the territory was to be named "Columbia", for the Columbia River and the Columbia District , but Kentucky representative Richard H. Stanton found the name too similar to the District of Columbia (the national capital, itself containing the city of Washington), and proposed naming the new territory after President Washington. Washington

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3136-421: The Washington State Department of Transportation (WSDOT) conducts a series of surveys on its highways in the state to measure traffic volume. This is expressed in terms of annual average daily traffic (AADT), which is a measure of traffic volume for any average day of the year. In 2013, WSDOT calculated that the busiest section of SR 526 was its interchange with Evergreen Way, carrying 75,000 vehicles, while

3234-689: The girders and supports of two of the overpasses from roosting pigeons , requiring cleanup by a hazmat crew and the installation of gel discs underneath the overpasses to deter all birds from them. The entire highway is in Snohomish County . State highways in Washington All state highways are designated by the Washington State Legislature and codified in the Revised Code of Washington (RCW), namely Chapter 47.17 RCW. These routes are defined generally by termini and points along

3332-510: The state of Washington . SR 526 was established during the 1964 state highway renumbering as the successor to SSH 1I between Mukilteo and Everett . The highways were preceded by the Mukilteo-Everett wagon road that was opened on August 14, 1914, traveling east along Possession Sound between Mukilteo and Everett, later renamed to Mukilteo Boulevard during the 1920s. The boulevard route had previously been surveyed in 1882 for

3430-585: The "deep freeze" winters of 1883–1884, 1915–1916, 1949–1950, and 1955–1956, among others. During these events, Western Washington experienced up to 6 feet (1.8 m) of snow, sub-zero (−18 °C) temperatures, three months with snow on the ground, and lakes and rivers frozen over for weeks. Seattle's lowest officially recorded temperature is 0 °F (−18 °C) set on January 31, 1950, but low-altitude areas approximately three hours away from Seattle have recorded lows as cold as −48 °F (−44 °C). The Southern Oscillation greatly influences weather during

3528-510: The 1905 numbering. The state legislature adopted new standards for designating state highways in 1990, following a three-year study from the Road Jurisdiction Committee. Among the changes were recommending highways serving state parks and ferry terminals be added to the system. A major restructure was passed by the legislature in 1991 and took effect on April 1, 1992. Washington (state) Washington , officially

3626-453: The 1964 state highway renumbering. The eastern terminus of SR 526, an interchange with I-5 in Everett, was completed in February 1965 and later became the southern terminus of SR 529 until 1991. The interchange was later converted to a single-point urban interchange in 2007 as part of a WSDOT project to improve I-5 through Everett. Planning for a new freeway to carry SR 526

3724-604: The Idaho border). The Olympic mountains and Cascades compound this climatic pattern by causing orographic lift of the air masses blown inland from the Pacific Ocean, resulting in the windward side of the mountains receiving high levels of precipitation and the leeward side receiving low levels. This occurs most dramatically around the Olympic Mountains and the Cascade Range. In both cases, the windward slopes facing southwest receive high precipitation and mild, cool temperatures. While

3822-644: The Interior had a different subsistence-based culture based on hunting, food-gathering and some forms of agriculture, as well as a dependency on salmon from the Columbia and its tributaries. The area has been known to host megathrust earthquakes in the past, the last being the Cascadia earthquake of 1700 . The first recorded European landing on the Washington coast was by Spanish Captain Don Bruno de Heceta in 1775, on board

3920-579: The Northwest Coast to explorers and traders from other nations, most notably Britain and Russia as well as the fledgling United States. American captain Robert Gray (for whom Grays Harbor County is named) then discovered the mouth of the Columbia River. He named the river after his ship, the Columbia . Beginning in 1792, Gray established trade in sea otter pelts. The Lewis and Clark Expedition entered

4018-768: The Oregon Trail, wandered north to settle in the Puget Sound area. Spanish and Russian claims to the region were ceded in the early 19th century through a series of treaties. The Spanish signed the Adams–Onís Treaty of 1819, and the Russians the Russo-American Treaty of 1824 and 1825 . The Oregon Question remained contested between the United Kingdom and the United States until the 1846 Oregon Treaty established

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4116-468: The Pacific Ocean consisting of numerous islands, deep fjords and bays carved out by glaciers. The remainder of the state consists of deep temperate rainforests in the west; mountain ranges in the west, center, northeast, and far southeast; and a semi-arid basin region in the east, center, and south, given over to intensive agriculture. Washington is the second most populous state on the West Coast and in

4214-481: The Pacific coast to 40 °F (4 °C) in the northeast. The lowest temperature recorded in the state was −48 °F (−44 °C) in Winthrop and Mazama . The highest recorded temperature in the state was 120 °F (49 °C) at Hanford on June 29, 2021. Both records were set east of the Cascades. Western Washington is known for its mild climate, considerable fog, frequent cloud cover, long-lasting drizzles in

4312-411: The Puget Sound lowlands are known for clouds and rain in the winter, the western slopes of the Cascades receive larger amounts of precipitation, often falling as snow at higher elevations. Mount Baker , near the state's northern border, is one of the snowiest places in the world. In 1999, it set the world record for snowfall in a single season—1,140 inches (95 ft; 29 m). East of the Cascades,

4410-464: The Western United States, after California . Mount Rainier , an active stratovolcano , is the state's highest elevation at 14,411 feet (4,392 meters), and is the most topographically prominent mountain in the contiguous U.S. Washington is a leading lumber producer, the largest producer of apples, hops, pears, blueberries, spearmint oil, and sweet cherries in the U.S., and ranks high in

4508-503: The border between British North America and the United States along the 49th parallel until the Strait of Georgia . Vague wording in the treaty left the ownership of the San Juan Islands in doubt; during the so-called Pig War , both nations agreed to a joint military occupation of the islands. Kaiser Wilhelm I of the German Empire was selected as an arbitrator to end the dispute, with

4606-413: The city of Mukilteo and the state-run ferry to Whidbey Island . SR 526 was established during the 1964 state highway renumbering as the successor to Secondary State Highway 1I (SSH 1I) between Mukilteo and Everett. Its original route followed a wagon road traveling along Possession Sound that opened in 1914; it was moved onto its current route in 1967 after Boeing announced its intention to build

4704-518: The climate becomes less arid, with annual rainfall increasing as one goes east to 21.2 inches (540 mm) in Pullman, near the Washington–Idaho border. The Okanogan Highlands and the rugged Kettle River Range and Selkirk Mountains cover much of the state's northeastern quadrant. The Palouse southeast region of Washington was grassland that has been mostly converted into farmland, and extends to

4802-680: The cold season. During the El Niño phase, the jet stream enters the U.S. farther south through California, therefore late fall and winter are drier than normal with less snowpack. The La Niña phase reinforces the jet stream through the Pacific Northwest, causing Washington to have more rain and snow than average. In 2006, the Climate Impacts Group at the University of Washington published The Impacts of Climate change in Washington's Economy ,

4900-693: The contiguous 48 states. Western Washington also is home of the Olympic Mountains , far west on the Olympic Peninsula , which support dense forests of conifers and areas of temperate rainforest . These deep forests, such as the Hoh Rainforest , are among the only rainforests in the continental United States. While Western Washington does not always experience a high amount of rainfall as measured in total inches of rain per year, it does consistently have more rainy days per year than most other places in

4998-503: The contract in May 1968. The first part of the section, spanning 2 miles (3.2 km) between 20th Avenue West (now Seaway Boulevard) and US 99 (now Evergreen Way), opened on April 23, 1969; the whole section was opened by the end of the year. The western end of Casino Road was truncated at Airport Road, which was extended from 100th Street Southwest to the highway in connecting it with Post Road (now SR 96 ) at its interchange with I-5; this allowed

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5096-524: The country. Eastern Washington —the part of the state east of the Cascades—has a relatively dry climate, in distinct contrast to the west side. It includes large areas of semiarid steppe and a few truly arid deserts in the rain shadow of the Cascades; the Hanford reservation receives an average annual precipitation of 6 to 7 inches (150 to 180 mm). Despite the limited amount of rainfall, agriculture

5194-530: The east, bounded mostly by the meridian running north from the confluence of the Snake River and Clearwater River (about 117°02'23" west), except for the southernmost section where the border follows the Snake River. Oregon is to the south, with the Columbia River forming the western part and the 46th parallel forming the eastern part of the Oregon–Washington border. During Washington's partition from Oregon,

5292-522: The entrance to the Strait of Juan de Fuca , but Cook did not realize the strait existed. It was not discovered until Charles William Barkley , captain of the Imperial Eagle , sighted it in 1787. The straits were further explored by Spanish explorers Manuel Quimper in 1790 and Francisco de Eliza in 1791, and British explorer George Vancouver in 1792. The British–Spanish Nootka Convention of 1790 ended Spanish claims of exclusivity and opened

5390-408: The excluded section of Casino Road to connect with the rest of the highway. A ramp directly connecting northbound I-5 with westbound SR 526 was subsequently opened on November 13, 1970. When Boeing expanded their factory in the early 1990s to accommodate 777 production, the state of Washington required that Boeing pay for upgrades to the connection between SR 526 and I-5. These upgrades resulted in

5488-401: The factory at the time; Boeing's selection of the factory site was contingent on the road's reconstruction into a four-lane highway. However, the federal Economic Development Administration denied Everett's request for a funding grant towards the highway, leading the state to fund the construction despite facing a budget shortfall itself. While the state waited for sufficient funding to commence

5586-588: The first one or two digits of a route it connects to and adding another digit or two. In some cases, instead of using the two-digit route's actual number, a number that would fit the grid is used instead. Three-digit routes have been numbered as follows: After passing several early laws designating state roads starting in 1893, the Washington State Legislature created the State Highway Board in 1905 and appropriated funds to construct - but not maintain - twelve numbered "state roads" in sparsely settled areas of

5684-460: The four-lane continuation of Paine Field Boulevard, curving north around the north–south runway of Paine Field and south of Japanese Gulch , into the city of Everett . The highway becomes the controlled-access Boeing Freeway and passes under the Boeing Access Road, a taxiway that connects the Boeing Everett Factory to Paine Field. SR 526 continues east and intersects Airport Road in

5782-461: The improvement project is slated for 2022, with work concluding in 2024. A different seismic retrofitting project involving the wrapping of steel "jackets" on the columns of bridges carrying SR 526 over Airport Road, Hardeson Road, and Casino Road, along with an on-ramp from Seaway Boulevard to eastbound SR 526, began in February 2023 and was completed that December; during preparations for the project, WSDOT contractor crews found excessive excrement on

5880-418: The least busiest section of the highway was its western terminus at SR 525, carrying 8,500 vehicles. SR 526 is designated as part of the National Highway System for its whole length, classifying it as important to the national economy, defense, and mobility. WSDOT designates the entire route of SR 526 as a Highway of Statewide Significance, which includes highways that connect major communities in

5978-468: The main routes, as is U.S. Route 101 Alternate . WSDOT has also defined some spurs that mainly serve to provide full access between intersecting routes. Although most state highways as defined by law are open to traffic, State Route 109 dead-ends at Taholah , State Route 501 has a gap in the middle, and State Routes 35 , 168 , 230 , 276 , and most of SR 171 , 213 , and 704 , have not been constructed. Notable sections of state highways include

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6076-418: The manufacture of warships. Seattle was the point of departure for many soldiers in the Pacific, several of whom were quartered at Fort Lawton, which later became Discovery Park . In Eastern Washington, the Hanford Works atomic energy plant was opened in 1943 and played a major role in the construction of atomic bombs . After the end of World War II, and with the beginning of the civil rights movement ,

6174-466: The next few decades failed to settle upon a compromise boundary and the Oregon boundary dispute was highly contested between Britain and the United States. Disputed joint occupancy by Britain and the U.S. lasted for several decades. With American settlers pouring into Oregon Country , Hudson's Bay Company , which had previously discouraged settlement because it conflicted with the fur trade, reversed its position in an attempt to maintain British control of

6272-409: The north Pacific Ocean, the continental air masses of North America, and the Olympic and Cascade mountains. In the spring and summer, a high-pressure anticyclone system dominates the north Pacific Ocean, causing air to spiral out in a clockwise fashion. For Washington, this means prevailing winds from the northwest bring relatively cool air and a predictably dry season . In the autumn and winter,

6370-420: The north. Olympia is the state capital , and the most populous city is Seattle . Washington is the 18th-largest state , with an area of 71,362 square miles (184,830 km ), and the 13th-most populous state, with more than 7.8 million people. The majority of Washington's residents live in the Seattle metropolitan area , the center of transportation, business, and industry on Puget Sound , an inlet of

6468-419: The oldest and most complete human remains found in North America, were discovered in Washington in the 1990s. The region has been home to many established tribes of indigenous peoples for thousands of years. They are notable for their ornately carved welcome figures, canoes, long houses and masks. Prominent among their industries were salmon fishing and, notably among the Makah , whale hunting. The peoples of

6566-418: The one and only official Constitution of the State of Washington. Washington became the 42nd state of the United States on November 11, 1889. Early prominent industries in the new state included agriculture and lumber. In Eastern Washington, the Yakima River Valley became known for its apple orchards, while the growth of wheat using dry farming techniques became particularly productive. Heavy rainfall to

6664-452: The original plan for the border followed the Columbia River east until the confluence with the Snake, and then would have followed the Snake River east; this was changed to keep Walla Walla 's fertile farmland in Washington. To the west of Washington lies the Pacific Ocean. Its northern border lies mostly along the 49th parallel , and then via marine boundaries through the Strait of Georgia , Haro Strait , and Strait of Juan de Fuca , with

6762-533: The production of apricots, asparagus, dry edible peas, grapes, lentils, peppermint oil, and potatoes. Livestock, livestock products, and commercial fishing—particularly of salmon, halibut, and bottomfish —are also significant contributors to the state's economy. Washington ranks second only to California in wine production. Manufacturing industries in Washington include aircraft, missiles, shipbuilding, and other transportation equipment, food processing, metals, and metal products, chemicals, and machinery. The state

6860-406: The production of electricity. This culminated in 1941 with the completion of the Grand Coulee Dam , the largest concrete structure in the United States and the largest dam in the world at its construction. During World War II, the state became a focus for war industries. While the Boeing Company produced many heavy bombers , ports in Seattle, Bremerton , Vancouver , and Tacoma were available for

6958-465: The project, Boeing constructed a temporary four-lane highway across the factory and parallel to Casino Road in June 1967 to relieve congestion on the latter road; at the same time, the section of Casino Road between Nelsons Corner and the west end of the controlled-access highway section was expanded to four lanes. Construction of the permanent four-lane, 3.5-mile (5.6 km) controlled-access highway section commenced shortly after Peter Kiewit Sons won

7056-522: The rest of the country, and for a time, it possessed a large shipbuilding industry. The region around eastern Puget Sound developed heavy industry during the period including World War I and World War II , and the Boeing company became an established icon in the area. During the Great Depression , a series of hydroelectric dams were constructed along the Columbia River as part of a project to increase

7154-407: The route; WSDOT may otherwise choose the details, and may bypass the designated points as long as the road serves the general vicinity. WSDOT's duties include "locating, designing, constructing, improving, repairing, operating, and maintaining" these state highways, including bridges and other related structures. Within cities and towns, the local governments are responsible for certain aspects of

7252-566: The same time many white patients recovered, they held "medicine man" Marcus Whitman personally responsible, and executed Whitman and twelve other white settlers. This was called the Whitman massacre in 1847. This event triggered the Cayuse War between settlers and Indians. Fort Nisqually , a farm and trading post of the Hudson's Bay Company and the first European settlement in the Puget Sound area,

7350-465: The section between Seaway Boulevard and the eastern terminus of the route. Such improvements include the construction of a new eastbound lane, the widening of the Seaway Boulevard eastbound on-ramp to the route, the addition of a ramp meter for the direct ramp to I-5 north, and the modification of the signal lights at the eastern terminus intersection with SR 99 and SR 527. The start of construction on

7448-652: The six crossings of the Cascade Range - the Columbia River Gorge ( SR 14 ), White Pass ( US 12 ), Chinook Pass ( SR 410 ), Snoqualmie Pass ( I-90 ), Stevens Pass ( US 2 ), and the North Cascades Highway ( SR 20 ). Of the 13 public road crossings of the Canada–US border in Washington, nine are on state highways. Major bridges include the Tacoma Narrows Bridge and three floating bridges :

7546-399: The state highway system in 1913, when they formed a two-tiered system of primary and secondary roads. Primary roads were completely controlled by the state, including maintenance, and received only names, while secondary roads kept their numbers and county maintenance. Unlike the earlier state roads, these primary roads mostly followed existing passable county roads. A 1923 restructuring of

7644-497: The state on October 10, 1805. Explorer David Thompson , on his voyage down the Columbia River, camped at the confluence with the Snake River on July 9, 1811, and erected a pole and a notice claiming the territory for Great Britain and stating the intention of the North West Company to build a trading post at the site. Britain and the United States agreed to what has since been described as "joint occupancy" of lands west of

7742-457: The state's growing Black or African American population's wages were 53% above the national average. The early diversification of Washington through the Great Migration led to successful efforts at reducing discrimination in the workplace. In 1950, Seattle's first black representative for the state's legislature was elected. At the 1970 U.S. census , the black population grew to 7.13% of

7840-485: The state's land area, mostly west of the northern Cascades. Approximately two-thirds of Washington's forested area is publicly owned, including 64 percent of federal land. Common trees and plants in the region are camassia , Douglas fir, hemlock, penstemon , ponderosa pine, western red cedar , and many species of ferns. The state's various areas of wilderness offer sanctuary, with substantially large populations of shorebirds and marine mammals. The Pacific shore surrounding

7938-530: The state. (Main highways in more populated areas would continue to be entirely under county control, though sometimes built with 50% state aid .) Six of these highways were east–west crossings of the Cascades; others included a portion of Chuckanut Drive and a road around the west side of the Olympic Peninsula . Under a 1909 law, the State Highway Board surveyed a connected network of proposed state roads, The legislature added most of these routes to

8036-407: The state. In addition to Western Washington and Eastern Washington , residents call the two parts of the state the "Westside" and the "Eastside", "Wet side" and "Dry side", or "Timberland" and "Wheatland", the latter pair more commonly in the names of region-specific businesses and institutions. These terms reflect the geography, climate, and industry of the land on both sides of the Cascades. From

8134-554: The state— is 50 miles (80 km) south of the city of Seattle, from which it is prominently visible. The U.S. Geological Survey considers 14,411-foot-tall (4,392 m) Mount Rainier the most dangerous volcano in the Cascade Range, due to its proximity to the Seattle metropolitan area , and most dangerous in the continental U.S. according to the Decade Volcanoes list. It is also covered with more glacial ice than any other peak in

8232-619: The streets maintained as parts of a state highway, including their grade and the portion not used for highway purposes. All routes, even Interstate and U.S. Highways, are defined as "state route number" plus the number; for instance, Interstate 5 is "state route number 5" and U.S. Route 395 is "state route number 395". Also included in the RCW are "state route number 20 north" (signed as State Route 20 Spur ) and "state route number 97-alternate" (signed as U.S. Route 97 Alternate ). Some other spurs, such as State Route 503 Spur , are defined as part of

8330-475: The system reassigned numbers to almost all the primary state highways, which were soon marked on signs. In 1937, the old primary/secondary split was abolished, and a new system of primary and secondary state highways was created, all to be maintained by the state in the same manner. The old state roads all kept their numbers as new primary state highways, and secondary state highways were created as alphanumeric branches of those primary highways (for instance SSH 8D

8428-622: The territory of both the Cayuse and the Nez Perce Indian tribes. Whitman's settlement would in 1843 help the Oregon Trail , the overland emigration route to the west, get established for thousands of emigrants in the following decades. Whitman provided medical care for the Native Americans, but when Indian patients—lacking immunity to new, "European" diseases—died in striking numbers, while at

8526-469: The total population. In 1970, the state was one of only four U.S. states to have been providing legal abortions before the 1973 Supreme Court decision in Roe v. Wade which loosened abortion laws nationwide. On May 18, 1980, following a period of heavy tremors and small eruptions, the north face of Mount St. Helens slid off in the largest landslide in recorded history before erupting violently , destroying

8624-415: The tropical Pacific regions a great distance into the Pacific Northwest. Western Washington is very cloudy during much of fall, winter, and early spring. Seattle averages the least sunshine hours of any major city in the United States. Despite Western Washington's marine climate similar to many coastal cities of Europe, there are exceptions such as the "Big Snow" events of 1880, 1881, 1893, and 1916, and

8722-487: The west of the Cascade Range produced dense forests, and the ports along Puget Sound prospered from the manufacturing and shipping of lumber products, particularly the Douglas fir . Other industries that developed in the state included fishing, salmon canning and mining. For a long period, Tacoma had large smelters where gold, silver, copper, and lead ores were treated. Seattle was the primary port for trade with Alaska and

8820-619: The western part of the state, SR 14 , SR 16 , SR 18 , and SR 20 along the Interstate 5 corridor, and SR 22 , SR 24 , SR 26 , SR 28 , and former SR 30 in the east. Odd numbers similarly increase from west to east, with SR 3 , Interstate 5 , SR 7 , SR 9 , SR 11 , SR 17 , SR 21 , SR 23 , SR 25 , SR 27 , and SR 31 following this general progression. ( SR 19 was added in 1991, and lies west of SR 3; SR 35 and SR 41 are extensions of highways in adjacent states.) Three-digit routes (and SR 92 and SR 96 ) are usually numbered by taking

8918-771: The winter and warm, temperate summers. The eastern region, which does not benefit from the general moderating effect of the Pacific Ocean, occasionally experiences extreme climate. Arctic cold fronts in the winter and heat waves in the summer are not uncommon. In the Western region, temperatures have reached as high as 118 °F (48 °C) in Maple Valley during the June 2021 heat wave , and as low as −6 °F (−21 °C) in Longview , and even -8 F (-22 C) in Sammamish . Forests cover about half

9016-478: Was a branch of PSH 8 ). The final renumbering was authorized by law in 1963 and posted in January 1964, when new "sign route" numbers were assigned that matched the inter-state systems and otherwise formed the present grid. Until 1970, these numbers coexisted with the older primary and secondary state highways, when the legislature adopted the sign route numbers as "state routes", finally eliminating all vestiges of

9114-412: Was among the first states to introduce same-sex marriage , and was one of only four states to have provided legal abortions on request before Roe v. Wade in 1973. Washington voters also approved a 2008 referendum on the legalization of physician-assisted suicide , making it one of 10 states to have legalized the practice. Washington was named after President George Washington by an act of

9212-400: Was approved in 1967 during construction of the Boeing factory , which was expected to generate more traffic congestion. The route initially used Casino Road, which was a two-lane road between Nelsons Corner in Mukilteo and Beverly Park in Everett; the eastern terminus was located at its intersection with US 99. The road was plagued with severe congestion as it was the only major arterial serving

9310-476: Was completed in 2000, the alignment was changed to make the SR 526 expressway and Paine Field Boulevard continuous. The new intersection with 84th Street facilitated access to a new Boeing museum, the Future of Flight Aviation Center & Boeing Tour , which opened in 2005. There were proposals in the 1980s and 1990s to realign SR 525 such that it would intersect with SR 526 near the head of Japanese Gulch. The realignment

9408-643: Was formed from the western part of the Washington Territory , which was ceded by the British Empire in the Oregon Treaty of 1846. It was admitted to the Union as the 42nd state in 1889. One of the wealthiest and most socially liberal states in the country, Washington consistently ranks among the top states for highest life expectancy and employment rates. It was one of the first states (alongside Colorado ) to legalize medicinal and recreational cannabis ,

9506-483: Was founded in 1833. Black pioneer George Washington Bush and his Caucasian wife, Isabella James Bush, from Missouri and Tennessee , respectively, led four white families into the territory and founded New Market, now Tumwater , in 1846. They settled in Washington to avoid Oregon 's black exclusion law , which prohibited African Americans from entering the territory while simultaneously prohibiting slavery . After them, many more settlers, migrating overland along

9604-532: Was intended to facilitate a new ferry dock in Mukilteo and to avoid the population center of the city. While the plans for the new dock were finalized, no plans were presented for such a connection, aside from the construction of SR 525 Spur. In response to the increased usage of SR 526, WSDOT considered a complete redesign of the route in 2017. However, after consulting with an advisory group composed of representatives from local city governments, transit agencies, and lobbying firms, WSDOT elected to make improvements to

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