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664:" system on the old bridge began in 2011; tolling on the new bridge was in place from its opening in 2016. The tolls are projected to generate $ 1.2 billion by 2056 to pay off bonds for the project as well as bridge operations and maintenance, debt service, future repairs, insurance, and deferred sales tax. The toll varies by time of day as well as day of week and applies in each direction. Rates are reviewed annually to cover all operational costs and debt service. For standard two axle passenger vehicles, the rate tops out as of 2020 at $ 4.30 during commuting hours ($ 2 additional for pay by mail) from a minimum of $ 1.25 between 11 p.m. and 5 a.m. Major holidays are assessed at the weekend rate. More than two axle vehicles are surcharged $ 2.15 per axle.
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stabilize the weight of the bridge; and two "cross" pontoons, weighing 10,100 short tons (9,200 t), are sited at each end of the floating span at transitional spans, which connect the deck to fixed bridges and approaches using hinges to move up to 24 inches (61 cm) for fluctuations in lake water levels moving the pontoons. All the pontoons are designed with watertight compartments that are monitored remotely with sensors to detect leaks that could lead to catastrophic failure.
403:(WSDOT) would still close the floating bridge to traffic. Although the original bridge carried two lanes of traffic in each direction, it did not include shoulders or pedestrian and bicycle infrastructure. The lack of a shoulder led to traffic congestion in the event of an accident, which would block one or two lanes in a given direction and block emergency services from accessing the bridge.
581:
109:
613:(HOV lane) per direction. It includes shoulders and a 14-foot-wide (4.3 m) pedestrian/bicycle path on the north side, unlike the 1963 bridge. Congestion on the old bridge was blamed on lack of shoulders, where disabled vehicles would cause severe backups. Ornamental elements include four sentinel towers rising 43 feet (13 m) above the bridge deck at the approaches, and
520:
The bridge features advanced monitoring devices and new maintenance facilities. Beneath the bridge is a three-story high brick building used to control and monitor various life support and utility systems on the bridge. A backup generator sits on the ground level to power all systems in case of power
709:
interchange, and was not fully traversable for bicyclists and pedestrians. The new westbound approach bridge opened in August 2017, with later revisions to extend the HOV lane towards the
Montlake interchange. The bridge's multi-use bike and pedestrian path partially opened in July 2016, with access
544:
cables and are divided into three types: 45 587-short-ton (533 t) fluke anchors used in softer soils deep in the lakebed; eight 107-short-ton (97 t) gravity anchors used in solid soils nearer to the shore; and five 10-foot-diameter (3.0 m), 79-to-92-foot-long (24 to 28 m) drilled
480:
that wrapped around parts of the pontoons. The repairs were made by the contractor at the direction of WSDOT from
December 2013 to June 2014 and cost a total of approximately $ 208 million, using up the majority of the program's reserve funds. As a result of the pontoon issues, the estimated opening
471:
of the concrete. A state investigative report by concrete expert John Reilly blamed the WSDOT Bridge and
Structures Office (BSO) for the error. The BSO did most of the pontoon design in-house, instead of delegating those details and the financial risk to contracting teams. The goal was to allow bids
548:
To ensure storm resistance in the event of water seeping into the pontoons, each pontoon is outfitted with a leak detection system with a float switch that sits about 3 inches (7.6 cm) off the floor. If the pontoon is breached, an alarm will sound inside the maintenance building. From there, a
561:
sections that are elevated 20 feet (6.1 m) above the concrete pontoons that forms the lower deck which essentially creates "a bridge on top of a bridge". Unlike the older bridge, maintenance vehicles can now access the pontoons from beneath the upper roadway deck without interrupting traffic.
411:
Planning of the replacement bridge started in 1997 with a cross-lake study conducted by the state
Department of Transportation. The study followed several others in the late 20th century to find solutions to traffic on the SR 520 floating bridge, with most proposals rejected after heavy opposition
511:
The new bridge was designed to be more stable in stronger winds and raised the bridge deck much higher above the surface of the lake than the old bridge. Unlike the original floating bridge, where the road surface is directly on pontoons connected end-to-end, the new bridge featured pontoons laid
466:
In 2012, WSDOT identified cracks and other problems with the first batch of completed pontoons, estimating that it would cost $ 400 million to repair cracks and other flaws that would bring down the bridge's predicted lifespan below the desired 75 years. The problems were originally speculated to
536:
Of the pontoons, 21 are longitudinal pontoons that support the deck and structure and are 360 by 75 by 28 feet (109.7 m × 22.9 m × 8.5 m) and weigh 11,000 short tons (10,000 t); 54 smaller supplemental pontoons, weighing 2,500 short tons (2,300 t), are used to
651:
extension with two options (both requiring 30 additional pontoons): one option would be 116 feet (35 m) wide with two lanes each direction, plus light rail to replace the HOV lanes; the other 150-foot-wide (46 m) option would retain the HOV lanes, two general purpose lanes in each
574:
to comply with local building codes. The original deck design called for three support columns but was later revised to two due to aesthetic issues. Moreover, the lighting mounted on top of the deck had to be positioned to minimize light pollution as well as its effect on aquatic habitat.
704:
Traffic on the new bridge was shifted over in two stages, beginning with westbound traffic on April 11 and ending with eastbound traffic on April 25. Initially, the bridge narrowed from 6 lanes to 4 lanes at the end of the floating span, over 1.2 miles (1.9 km) east of the
427:
Funding was allocated to major phases of the project at different times. The western portions of the project in
Seattle were the last to be funded. The $ 4.5 billion in funding comes largely from the state gas tax earmarked for highways, tolling, and federal highway funds.
357:). The 7,578-foot-long (2,310 m) floating span consisted of 33 pontoons and cost $ 24.7 million to construct (equivalent to $ 246 million in 2024); the bridge carried four lanes of traffic, separated by a curb that was later replaced with a simple
512:
north–south, perpendicular to the direction of vehicular traffic, and a road surface on a platform raised 20 feet (6.1 m) above the water. This design now includes shoulders and a protected pedestrian and bicycle path across the viaduct.
728:
which plans to reuse the individual pontoons for floating decks and other projects. An unaffiliated contest was held in 2012 seeking ideas for the 33 pontoons of the old bridge, with solutions ranging from a "floating
595:. The western approach is split between the original low-level roadway for eastbound traffic and a high-level viaduct for westbound traffic, bicyclists, and pedestrians. The land straight ahead past the bridge is
472:
to be submitted sooner. The states top bridge engineer, Jugesh Kapur was ultimately let go over the error and another
Department of Transportation employee was demoted. A floating, 660-short-ton (600 t)
2174:
841:
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In March 2015, two construction accidents on the bridge slowed construction for reevaluation of safety measures: a contractor was killed after a high fall on the east highrise; and a crane-lifted load of
443:
New (left) and old (right) bridges in 2015 showing difference in decks: old road surface is directly on pontoons laid end-to-end, but new road surface is raised above pontoons laid perpendicular to road.
1228:. SR 520 Bridge Replacement and HOV Program: Final Environmental Impact Statement and Section 4(f) and 6(f) Evaluations (Report). Washington State Department of Transportation. June 2011. Archived from
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1322:
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Public transportation and high-occupancy vehicle (HOV) use were incorporated in the bridge design. The bridge includes HOV lanes with priority for transit. A 2008 WSDOT report included five core
2228:
17:
724:
for disposal and recycling; in March 2016, the city rejected the plan, citing the possible release of toxins in the pontoon's concrete. The pontoons were sold to a recycling company based in
2604:
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1600:
2143:
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stem from shortcuts allegedly taken by the contractor to complete pontoons to meet set deadlines; the proposed solutions to fix the pontoons included adding high-tension steel cables and
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connecting the
Eastside (Kirkland, Redmond, and Bellevue) to Downtown Seattle and the University District, with a base frequency of 15 minutes, increasing up to 7 minutes at peak times.
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2353:
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proposed increasing toll rates to introduce nighttime tolling by 2017. The toll rate increase and nighttime toll was approved by the commission and implemented on July 1, 2017.
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1222:
1693:
72:
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on the bridge and the
Interstate 5 express lanes the following day. As part of the opening ceremonies, the bridge was certified as the world's longest floating bridge by
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1959:
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and attended by an estimated 40,000 to 50,000 people. The ceremony also included a community fun run and walk on the bridge, and a bicycle ride hosted by the
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standards, with vulnerabilities in its hollow support structures that could have failed in a major earthquake. Additionally, near the end of its lifetime,
1312:
943:
How Much Is That in Real Money? A Historical Price Index for Use as a
Deflator of Money Values in the Economy of the United States: Addenda et Corrigenda
914:
3008:
2235:
1564:
1864:
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1087:
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area, bridge replacement was explored as early as 1969, when building a parallel span was explored and rejected. The
Eastside is also served by the
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361:; at the center was a drawspan that opened for large vessels traversing the lake. The original bridge would also close to traffic during sustained
2600:
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1590:
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2135:
1509:
880:
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1985:
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1764:
1351:
785:
400:
164:
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The bridge deck was lifted into place in August 2015, and the final concrete pour was finished in October 2015, completing the bridge deck.
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588:
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The first stage of the SR 520 floating bridge replacement project was the construction of 77 concrete pontoons in 2011 and 2012 by
395:
and strong winds were able to compromise the aging drawspan, anchor cables, and pontoons, leading to structural failure in a major
50:
1685:
963:
How Much Is That in Real Money? A Historical Price Index for Use as a Deflator of Money Values in the Economy of the United States
644:, accompanied by landscaped lids with parking and lawns, in 2014 for increased compatibility with the bridge's planned HOV lanes.
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2434:
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336:
324:
28:
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1925:
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1951:
1755:"Inside the world's longest floating bridge: How engineers made Seattle's new Lake Washington span bigger, better and safer"
1403:
350:
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661:
733:" to partial submersion for walking paths. The first pontoon of the old bridge to be disassembled was towed through the
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1433:
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369:
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1826:
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463:. Pontoon assembly and fastening, to form the floating bridge's deck, began in 2014 and concluded in July 2015.
27:
This article is about the present-day bridge that opened in 2016. For the original bridge at this location, see
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loss. Behind the back wall of the building lies a massive retaining wall built in response to steep hills.
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for the project was issued in 2011, allowing for construction of the pontoons to begin the following year.
65:
672:
3018:
2835:
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2082:
1083:
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396:
2488:
2375:
2846:
2706:
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1595:
1534:
1377:"Get in line: Largest pontoons for new SR 520 floating bridge all in final position on Lake Washington"
734:
460:
346:
301:
112:
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2641:
1917:
Washington State Department of Transportation; Sound Transit; King County Metro (December 31, 2008).
1501:
876:
377:
2770:
1981:
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The old bridge was planned to be decommissioned by floating away pontoons to an industrial site in
710:
to the completed sections for an "out-and-back" experience, and fully opened on December 20, 2017.
637:
636:
Existing freeway bus stations (also known as "flyer stops") on the Eastside at Evergreen Point and
317:
1754:
1463:
https://www.seattletimes.com/seattle-news/state-fires-top-bridge-engineer-over-520-pontoon-flaws/
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was launched in November 2013 to assist in repairs of the pontoons, functioning as a portable
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The original Evergreen Point Floating Bridge was designed before the implementation of modern
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The bridge's 58 anchors all feature 3-inch-thick (7.6 cm), 1,000-foot-long (300 m)
2658:
688:
596:
452:
431:
In 2014, the budget for the project was increased by $ 250 million to cover cost overruns.
804:
737:
in July 2016. As of December 2020, several pontoons of the old bridge are anchored in the
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shaft anchors used in conjunction with the gravity anchors to prevent navigation hazards.
8:
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2053:"Goodbye viaduct, hello tunnel: WSDOT plans a celebration of the old and new Feb. 2-3"
760:
In April 2017, the bridge project was awarded the 2017 Grand Conceptor Award from the
2900:
2868:
2863:
2820:
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1317:
1157:(Report). Washington State Department of Transportation. January 2014. Archived from
836:
626:
497:
2007:
2519:"So long: first pontoon from the old SR 520 bridge floating out of Lake Washington"
2380:
1477:(Press release). Washington State Department of Transportation. November 22, 2013.
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937:
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The western half of the SR 520 megaproject, which includes replacement of the
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530:
342:
190:
154:
2800:
2795:
2648:
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1563:(Press release). Washington State Department of Transportation. January 8, 2014.
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bridge and Montlake Boulevard interchange, is scheduled to be completed in 2031.
648:
305:
123:
2629:
2603:(Press release). Washington State Department of Transportation. April 26, 2017.
320:, as well as the world's widest measuring 116 feet (35 m) at its midpoint.
2736:
2521:(Press release). Washington State Department of Transportation. July 20, 2016.
1288:. Washington State Department of Transportation. March 25, 2016. Archived from
697:, at 7,708.49 feet (2,349.55 m) long; the bridge took the record from the
358:
180:
2081:(Press release). Washington State Department of Transportation. Archived from
1379:(Press release). Washington State Department of Transportation. July 8, 2015.
680:
The new bridge was dedicated on April 2, 2016, in a ceremony presided over by
3002:
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2202:. Washington State Department of Transportation. January 2016. Archived from
630:
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that float above the water and are secured by 58 anchors to the lake bottom.
87:
74:
2571:
2234:. Washington State Department of Transportation. August 2015. Archived from
2079:"April grand opening celebration announced for SR 520's new floating bridge"
399:. Even if the storms were below the maximum threshold for failure to occur,
341:
The original Evergreen Point Floating Bridge, also named for state governor
2916:
1821:
1350:. Washington State Department of Transportation. March 2015. Archived from
641:
2167:"New 520 bridge to open in April; walkers, bicyclists get to try it first"
1126:
832:"New 520 bridge to open in April; walkers, bicyclists get to try it first"
1020:
749:
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pump can be lowered into the chamber and controlled from the deck above.
392:
2408:"SR 520 – Floating Bridge and Landings Project: Kenmore Industrial Park"
484:
Construction of the bridge deck, beginning with the eastern approach in
365:
of 50 miles per hour (80 km/h) or higher for more than 15 minutes.
1924:(Report). Washington State Department of Transportation. Archived from
738:
684:
493:
1792:"SR 520 – Floating Bridge and Landings Project: Construction Overview"
1015:
1475:"Drydock in the water: SR 520 coffer cell arrives on Lake Washington"
730:
473:
459:. The pontoons were floated to the bridge on Lake Washington via the
388:
362:
349:(at the time designated temporarily as the Evergreen Point branch of
1759:
149:
2690:
2601:"New SR 520 floating bridge named America's top engineering feat"
1505:
477:
309:
133:
1655:"520 bridge incidents prompt extra safety training around state"
562:
According to a project engineer on the site, the deck had to be
2410:. Washington State Department of Transportation. Archived from
1794:. Washington State Department of Transportation. Archived from
976:
713:
Shortly after the opening of the bridge's westbound lanes, the
2462:"Company buys 520 bridge pontoons, plans to recycle worldwide"
2197:"Traffic switch from old SR 520 floating bridge to new bridge"
1855:"What It Takes to Keep a 7,700-Foot Floating Bridge From Doom"
1404:"520 Bridge pontoon problems could reach nearly $ 400 million"
1016:"Lake Washington Floating Bridge is dedicated on July 2, 1940"
782:
The SR 520 Albert D. Rosellini Evergreen Point Floating Bridge
144:
The SR 520 Albert D. Rosellini Evergreen Point Floating Bridge
2688:
1624:"Modern design, retro touches: Here comes the new 520 bridge"
541:
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of the bridge was pushed back from December 2014 into 2016.
907:"Evergreen Point Floating Bridge opens on August 28, 1963"
640:
were rebuilt and moved from the freeway's shoulder to the
368:
Due to increased traffic generated by rapid growth of the
316:. The 7,710-foot-long (2,350 m) floating span is the
2572:"Skanska inks $ 1.4B contract for new Portage Bay Bridge"
1047:
1045:
1043:
36:
Floating bridge carrying a freeway in Seattle, Washington
2319:"WSDOT opens new bike/pedestrian trail on SR 520 bridge"
1888:"Working toward consensus on a new 520 floating bridge"
1427:
1425:
1345:"Pontoon construction complete for new floating bridge"
1113:
1111:
1109:
1107:
1105:
1040:
676:
Eastbound view from the floating portion of the bridge
999:"Highway Department: Commission Bars Traffic Study".
327:
at the site, which was 130 feet (40 m) shorter.
1529:
1527:
1422:
1102:
701:, which was 130 feet (40 m) shorter in length.
667:
376:
completed in 1940 and 1989, carrying traffic across
345:, opened on August 28, 1963, carrying the four-lane
1786:
1784:
1782:
1717:"State's newest floating bridge now all decked out"
871:
869:
867:
865:
863:
861:
859:
18:
Governor Albert D. Rosellini Bridge—Evergreen Point
2570:
1653:Lindblom, Mike; Cornwell, Paige (March 18, 2015).
1313:"How to Build the World's Longest Floating Bridge"
2776:George Washington Memorial Bridge (Aurora Bridge)
1984:. Washington State Department of Transportation.
1723:. Washington State Department of Transportation.
1537:. Washington State Department of Transportation.
1524:
1146:
1144:
879:. Washington State Department of Transportation.
807:. Washington State Department of Transportation.
799:
797:
795:
609:The bridge has two general purpose lanes and one
3000:
1822:"How much do you know about the new 520 bridge?"
1779:
1652:
1561:"WSDOT executes new SR 520 pontoon change order"
856:
591:Panoramic view of the bridge looking north from
2293:"Bike/pedestrian path opening on SR 520 Bridge"
1278:
2489:"What to do with the old 520 Bridge pontoons?"
2435:"Kenmore says no to 520 bridge deconstruction"
1952:"Evergreen Point transit station opens Monday"
1141:
792:
2674:
1748:
1746:
1744:
1742:
900:
898:
786:Washington State Department of Transportation
784:(Plaque on bridge deck). Medina, Washington:
529:The floating bridge is laid atop 77 concrete
412:from communities on both ends of the bridge.
401:Washington State Department of Transportation
323:The bridge opened in April 2016 and replaced
165:Washington State Department of Transportation
1714:
1434:"State admits costly mistakes on 520 bridge"
1217:
1215:
1076:
929:
647:The bridge was engineered to accommodate a
260:Evergreen Point Floating Bridge (1963–2016)
2990:Italics denote former bridges and tunnels.
2681:
2667:
2136:"Thousands cross new 520 Bridge – on foot"
1919:State Route 520 High Capacity Transit Plan
1739:
1584:
1582:
895:
715:Washington State Transportation Commission
3009:2016 establishments in Washington (state)
2630:SR 520 Bridge Replacement and HOV Program
2546:"Bridge from afar moored in Pitt Meadows"
2543:
2486:
2229:"Building the West Approach Bridge North"
1752:
1715:Morse-Miller, Haylee (October 27, 2015).
1591:"Construction to begin on new 520 bridge"
1588:
1212:
904:
762:American Council of Engineering Companies
2164:
2050:
1949:
1852:
1686:"Road-deck milestone for new 520 bridge"
1683:
1621:
1502:"More woes plague SR-520 Bridge project"
1431:
1253:
956:
936:
829:
699:previous Evergreen Point Floating Bridge
671:
620:
566:from the main support structure using a
438:
325:another floating bridge of the same name
2487:Gutierrez, Scott (September 23, 2012).
2459:
1579:
1401:
1310:
1256:"Problems push 520 project over budget"
979:"Consumer Price Index (estimate) 1800–"
524:
515:
14:
3044:Concrete bridges in Washington (state)
3001:
2346:"State proposes 520 Bridge toll hikes"
2343:
2325:from the original on December 21, 2017
1962:from the original on September 2, 2017
1885:
1815:
1813:
1499:
1325:from the original on February 24, 2016
1286:"Pontoon Tracking and Bridge Assembly"
1051:
337:Evergreen Point Floating Bridge (1963)
43:Evergreen Point Floating Bridge (2016)
29:Evergreen Point Floating Bridge (1963)
2901:Aubrey Davis Park (Mercer Island Lid)
2662:
2272:from the original on December 1, 2017
2259:
2133:
2030:"SR 520 Bridge Multi-Axle Toll Rates"
1982:"SR 520 – Light Rail in the Corridor"
1898:from the original on January 23, 2017
1054:"The Longest Floating Bridge: SR 520"
1013:
977:Federal Reserve Bank of Minneapolis.
570:to ensure seismic resistance up to a
3049:Pontoon bridges in the United States
2544:Melnychuk, Phil (October 31, 2016).
2432:
2290:
2076:
1819:
1432:Lindblom, Mike (February 26, 2013).
1119:"Ten Years of SR 520 Bridge Project"
1084:"SR 520 Floating Bridge Replacement"
811:from the original on January 8, 2018
318:longest floating bridge in the world
2468:from the original on April 13, 2016
2441:from the original on April 14, 2016
2388:from the original on April 12, 2018
2376:"SR 520 Bridge toll rates increase"
2356:from the original on April 16, 2016
2262:"SR 520 bridge closed this weekend"
2165:Lindblom, Mike (January 12, 2016).
2051:Lindblom, Mike (November 1, 2018).
1988:from the original on April 19, 2016
1867:from the original on April 20, 2016
1853:Marshall, Aarian (April 19, 2016).
1834:from the original on April 21, 2016
1810:
1767:from the original on March 18, 2017
1665:from the original on April 16, 2016
1634:from the original on April 22, 2016
1589:Gutierrez, Scott (March 29, 2012).
1541:from the original on April 21, 2016
1500:Vedder, Tracy (February 28, 2014).
1444:from the original on April 16, 2016
1266:from the original on April 16, 2016
1184:"Evergreen Point bridge solutions?"
1090:from the original on April 19, 2017
1064:from the original on March 21, 2017
1028:from the original on March 20, 2017
917:from the original on April 13, 2016
883:from the original on April 23, 2016
830:Lindblom, Mike (January 12, 2016).
451:at two purpose-built facilities in
298:Governor Albert D. Rosellini Bridge
24:
3039:Bridges in King County, Washington
3034:Toll bridges in Washington (state)
3024:Road bridges in Washington (state)
2689:Bridges and tunnels in and around
2525:from the original on July 24, 2016
2321:. KING 5 News. December 20, 2017.
2299:from the original on July 24, 2016
2177:from the original on April 7, 2016
2115:from the original on June 30, 2016
1753:Schlosser, Kurt (March 30, 2016).
1727:from the original on March 4, 2016
1696:from the original on July 14, 2016
1684:Lindblom, Mike (August 23, 2015).
1383:from the original on March 4, 2016
1311:Newcomb, Tim (November 11, 2011).
844:from the original on April 7, 2016
500:bus and an overhead highway sign.
208:116 feet (35 m) (at midpoint)
25:
3060:
2623:
2578:Seattle Daily Journal of Commerce
2499:from the original on May 13, 2016
2260:DeMay, Daniel (August 25, 2017).
2146:from the original on May 12, 2016
2105:"Longest bridge, floating bridge"
1886:Emmert, Mark A. (June 19, 2007).
1827:Seattle Daily Journal of Commerce
1622:Lindblom, Mike (March 28, 2012).
1410:from the original on June 5, 2016
1402:Douglas, C.R. (August 27, 2013).
1254:Lindblom, Mike (April 17, 2016).
905:Dougherty, Phil (June 26, 2015).
805:"SR 520 – Budget and Performance"
668:Opening and removal of old bridge
2607:from the original on May 3, 2017
2460:Langler, John (March 31, 2016).
2433:Graf, Heather (March 31, 2016).
2344:Burton, Lynsi (April 11, 2016).
2291:Chen, Natascha (July 22, 2016).
2077:Peer, Steve (January 12, 2016).
1950:Lindblom, Mike (June 15, 2014).
1603:from the original on May 8, 2016
1567:from the original on May 9, 2016
1535:"SR 520 – Pontoon Modifications"
1512:from the original on May 8, 2016
1481:from the original on May 9, 2016
1014:Lange, Greg (January 14, 1999).
1003:. December 16, 1969. p. E6.
877:"SR 520 – Floating Bridge Facts"
580:
107:
49:
2944:Downtown Seattle Transit Tunnel
2791:Lacey V. Murrow Memorial Bridge
2781:Homer M. Hadley Memorial Bridge
2760:Evergreen Point Floating Bridge
2753:Evergreen Point Floating Bridge
2593:
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2134:Demay, Daniel (April 2, 2016).
2127:
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1176:
1052:Flores, Sergio (January 2017).
652:direction, and add light rail.
557:The bridge deck is made of 776
434:
290:Evergreen Point Floating Bridge
229:$ 4.56 billion (project budget)
1820:Peer, Steve (April 14, 2016).
1007:
992:
823:
774:
743:Pitt Meadows, British Columbia
552:
417:environmental impact statement
374:Interstate 90 floating bridges
355:1964 state highway renumbering
13:
1:
2806:North Queen Anne Drive Bridge
2550:Maple Ridge-Pitt Meadows News
767:
660:Electronic tolling with the "
330:
1152:SR 520 Sustainability Report
971:American Antiquarian Society
951:American Antiquarian Society
496:swung out of control into a
7:
1196:. March 25, 1997. p. 6
611:high-occupancy vehicle lane
406:
10:
3065:
2847:West Spokane Street Bridge
2707:List of tunnels in Seattle
2702:List of bridges in Seattle
2493:Seattle Post-Intelligencer
2350:Seattle Post-Intelligencer
2266:Seattle Post-Intelligencer
2140:Seattle Post-Intelligencer
2008:"SR 520 Bridge Toll Rates"
1596:Seattle Post-Intelligencer
735:Lake Washington Ship Canal
655:
461:Lake Washington Ship Canal
422:
334:
302:Washington State Route 520
26:
3029:Seattle metropolitan area
3014:Bridges completed in 2016
2987:
2975:Brightwater sewage tunnel
2967:
2931:
2888:
2881:
2856:
2766:First Avenue South Bridge
2722:
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755:
604:
506:
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264:
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200:7,710 feet (2,350 m)
196:
186:
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171:
160:
148:
140:
129:
119:
103:
64:
48:
41:
59:from the multi-use trail
1189:Ellensburg Daily Record
1058:American Infrastructure
488:, began in March 2012.
351:Primary State Highway 1
245:April 2, 2016
2959:University Link tunnel
2642:SR 520 Project Library
2635:July 21, 2015, at the
2109:Guinness World Records
694:Guinness World Records
682:Governor of Washington
677:
572:magnitude 9 earthquake
444:
385:earthquake engineering
380:to and from Bellevue.
88:47.64080°N 122.25926°W
2954:Northgate Link tunnel
2949:Great Northern Tunnel
2907:Battery Street Tunnel
2896:State Route 99 Tunnel
2831:20th Avenue NE Bridge
2826:Spokane Street Bridge
2647:May 26, 2019, at the
675:
621:Public transportation
593:Madison Park, Seattle
564:structurally isolated
449:Kiewit-General-Manson
442:
55:Looking east towards
1123:Shannon & Wilson
689:Cascade Bicycle Club
525:Pontoons and anchors
516:Maintenance building
292:, also known as the
93:47.64080; -122.25926
2841:West Seattle Bridge
2811:Schmitz Park Bridge
2747:East Channel Bridge
2731:Alaskan Way Viaduct
1357:on January 23, 2017
1235:on January 23, 2017
1223:"Executive Summary"
1206:Google News Archive
1164:on January 23, 2017
629:routes proposed by
617:on the north side.
343:Albert D. Rosellini
296:and officially the
84: /
3019:Bridges in Seattle
2939:Beacon Hill Tunnel
2923:Mount Baker Tunnel
1060:. pp. 66–70.
707:Montlake Boulevard
678:
445:
2996:
2995:
2983:
2982:
2913:Convention Center
2877:
2876:
2869:Wilburton Trestle
2864:Salmon Bay Bridge
2836:University Bridge
2821:South Park Bridge
2816:Ship Canal Bridge
2786:Jose Rizal Bridge
2742:Cowen Park Bridge
2414:on April 21, 2016
2384:. June 19, 2017.
2209:on April 17, 2016
2171:The Seattle Times
2085:on April 17, 2016
2057:The Seattle Times
1956:The Seattle Times
1892:The Seattle Times
1798:on April 21, 2016
1690:The Seattle Times
1659:The Seattle Times
1628:The Seattle Times
1438:The Seattle Times
1318:Popular Mechanics
1292:on April 16, 2016
1260:The Seattle Times
1129:on March 18, 2017
1001:The Seattle Times
837:The Seattle Times
627:bus rapid transit
498:King County Metro
286:
285:
237:April 11–25, 2016
226:Construction cost
16:(Redirected from
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1406:. Q13 FOX News.
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1125:. Archived from
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1086:. GeoEngineers.
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789:
788:. April 2, 2016.
778:
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559:precast concrete
252:
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191:Precast concrete
155:Albert Rosellini
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2801:Montlake Bridge
2796:Magnolia Bridge
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2654:Project Booklet
2649:Wayback Machine
2637:Wayback Machine
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2581:. April 4, 2024
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2464:. KING 5 News.
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2295:. KIRO 7 News.
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469:post-tensioning
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347:State Route 520
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314:eastern suburbs
306:Lake Washington
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172:Characteristics
124:Lake Washington
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2771:Fremont Bridge
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2737:Ballard Bridge
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2624:External links
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2241:on May 9, 2016
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1721:The WSDOT Blog
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935:1634–1699:
911:HistoryLink
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597:Laurelhurst
553:Bridge deck
494:steel pipes
391:induced by
213:Design life
113:SR 520
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3003:Categories
2036:August 22,
2014:August 22,
768:References
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685:Jay Inslee
662:Good to Go
615:belvederes
415:The final
389:vibrations
363:wind gusts
353:until the
331:Background
300:, carries
294:520 Bridge
265:Statistics
249:2016-04-02
76:47°38′27″N
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2503:April 17,
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815:April 17,
731:High Line
474:cofferdam
242:Dedicated
150:Named for
115:(6 lanes)
2645:Archived
2633:Archived
2605:Archived
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2523:Archived
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