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Crews skillfully guide Pontoon B into the Hiram M. Chittenden Locks in Ballard after a four day journey from Aberdeen, Wash. Pontoon B is the 48th pontoon to arrive on Lake Washington, out of a total of 77 pontoons needed to construct the new SR 520 floating bridge. Build your own Pontoon B by visiting our website.
A 360-foot-long and 11,000 ton longitudinal pontoon is towed through the launch channel of the SR 520 pontoon construction site. The float-out operations coincided with the high tide late in the evening on April 28, 2013. Crews worked through blustery winds and heavy rain to float-out the six pontoons from the casting basin.
Progress continues on the SR 520 Pontoon Construction Project, as the second cycle of new pontoons left the Aberdeen casting basin overnight April 28 and 29, 2013. The late-night timing coincided with the favorable high tide needed for float-out.
In the second cycle, crews built three longitudinal pontoons, two supplemental stability pontoons and one cross pontoon. The 360-foot-long longitudinal pontoons are the backbone of the new SR 520 floating bridge being built on Lake Washington; the supplemental pontoons provide stability and flotation, and the cross pontoons cap the bridge on the east and west ends. Crews will build a total of six cycles of new pontoons in Aberdeen.
A bird's-eye view of construction barges near the SR 520 east approach structure, looking south. Aerial photo taken on April 29, 2012.
Photo by Aequalis Photography
After passing underneath Seattle’s Aurora Bridge, Pontoon MNW enters Lake Union on its way to Lake Washington. Build in Tacoma, Pontoon MNW was the 45th pontoon to arrive on Lake Washington, out of a total of 77 pontoons needed to construct the new SR 520 floating bridge. Visit the SR 520 pontoon tracker page for the latest updates on pontoon movements.
In this photo we can see the coffer cell making its Lake Washington debut in style. This massive coffer cell will be used to complete repairs on the two remaining Cycle 1 pontoons.
At the east highrise near Medina, crews use large derrick barges to lift each girder into place. More than 300 girders will support the concrete roadway at each end of the new floating bridge.
More information about the new SR 520 floating bridge is available on our website.
The Cowes floating bridge is a passenger and vehicle chain ferry which provides the only crossing of the River Medina between East and West Cowes.
The current vessel "Floating Bridge No.6" was built in 2017 by Mainstay Marine of Pembroke Dock, Wales. It was installed on 14 May 2017. However, after a series of technical issues the service was suspended later the same month by the Maritime and Coastguard Agency.
When this picture was taken, on 20th September 2017, the service remained suspended, although the vessel was making test runs. A temporary launch service has been provided for foot passengers but vehicles have to make a ten-mile diversion via Newport.
Pontoon OSW approaches the Fremont Bridge in Seattle, before making its way to its new home on Lake Washington. Built in Tacoma, Pontoon OSW was the 41st pontoon to arrive on Lake Washington, out of a total 77 pontoons needed to construct the new SR 520 floating bridge. Build your own Pontoon OSW by visiting our website.
The final anchor is suspended just above Lake Washington, waiting for crews to finish attaching its anchor cable.
The anchor is seen inside the steel jetting frame that will help it burrow into the soft sediment at the bottom of the lake. Air is pushed through the tubes of the frame as the anchor sinks into the lakebed. After the anchor is embedded in the sediment, rock is placed on top of the anchor as the final step in the anchor-setting process.
Crews were quick to unload a delivery of steel rebar to the Aberdeen pontoon construction site on Feb. 24, 2014. Once assembled, this rebar will be part of the Cycle 5 pontoons slated for construction in the coming months.
Construction crews are underway on the fourth cycle of SR 520 bridge pontoons in Aberdeen. In this cycle, crews will build six total pontoons:
• Four longitudinal pontoons (360 ft. x 75 ft. x 29 ft.)
• Two supplemental stability pontoons (98 ft. x 60 ft. x 28 ft.)
Iron workers prepared steel rebar outside of the Aberdeen casting basin on Feb. 24, 2014. This rebar will be used to reinforce the concrete of the next cycle of pontoons.
Construction crews are underway on the fourth cycle of SR 520 bridge pontoons in Aberdeen. In this cycle, crews will build six total pontoons:
• Four longitudinal pontoons (360 ft. x 75 ft. x 29 ft.)
• Two supplemental stability pontoons (98 ft. x 60 ft. x 28 ft.)
Using a barge-mounted crane, crews lowered the last of 776 precast, interlocking roadway deck sections onto the new floating bridge. The setting of this final, 100-ton deck section came less than a year after crews set the first low-rise roadway deck section on Sept. 8, 2014.
More information about the new SR 520 floating bridge is available on our website.
State Route 520 is a state highway and freeway in the U.S. state of Washington. It extends 12.82 miles (20.63 km) from Seattle in the west to Redmond in the east.
SR-520 originates at Interstate 5 in Seattle at the north end of Capitol Hill just south of Roanoke Park.
It bridges Portage Bay on a viaduct, crosses through the Montlake neighborhood, and continues east on a causeway through the marshlands of the Washington Park Arboretum and across Foster Island. From there it crosses Lake Washington on the Evergreen Point Floating Bridge (1963) to Medina. At 7,578 feet (2,310m), it is the longest floating bridge in the world.
Source: www.wikipedia.org
July 16, 2011, Bellevue, Washington, taken from here.
Crews install some of the final concrete that will form roadway for the westbound lanes leading to the new floating bridge.
A gangway section is hoiseted away from the pontoons, clearing the decks for float-out.
Construction crews working on the SR 520 Pontoon Construction Project took advantage of an extra-high tide Oct. 5, 2013, to float six concrete pontoons into the Chehalis River. These pontoons comprise the third of six pontoon construction cycles and are destined for Lake Washington to form the backbone of the new SR 520 floating bridge.
Everyone has a way of processing photos, I like to use HDR sometimes to bring out those shadow areas that would normally be dark. The photos can be easily overdone such as the halos you often see so I try to avoid overdoing it and give my photos sort of a surreal character, without being "Wacky"....like me. I also masked out the sky and did a little color painting and multiplied it by 77% and unsaturated it by 15.
Working high above Lake Washington, a pair of construction workers install forms to complete the pier table atop the north column of Pier 1. In the distance, across Lake Washington in Seattle, workers are making steady progress on the West Connection Bridge and pontoons continue to be moored at the west side staging area.
Looking west from the new bridge maintenance dock in Medina, Pier 1 takes shape as balanced cantilever construction continues at the south column and work on the pier table atop the north column is nearly complete.
For more information on balanced cantilever construction, see page 2 of our May 2013 Construction Newsletter.
As the team wrapped up the day after hosting nearly 30,000 guests plus over 13,000 runners during the grand opening celebration, the sunset on Lake Washington provided a perfect photo finish to the day.
Crew members on the West Connection Bridge work together to secure a cable that will be used to left this girder into place a top the pier columns. A derrick barge will then lift the girder into place, creating the support for the roadway deck of the West Connection Bridge
As the team prepared the bridge for thousands of visitors, the sunset on Lake Washington was quite colorful.
WSDOT crews conducted their annual bridge maintenance during the July 12-15, 2013, weekend closure, including inspections of drawspan equipment.
The coffer cell is a large steel structure that measures 35 feet tall by 45 feet wide by 144 feet long. It was built in Tacoma and towed to Lake Washington on a barge. Once in place, the coffer cell will be used by SR 520 bridge construction crews to repair two concrete pontoons on the lake.
This season, construction crews have been busy along the Medina shoreline. From left to right we can see new roadway extending over Lake Washington from Pier 2, Pier 1 roadway support structures, Pontoons W and A, Pontoon U, and repair work on Pontoon V.
Crews working on the SR 520 Eastside Transit and HOV Project worked thoughout the highway during the full weekend closure of SR 520 from June 6-9, 2014. In this photo, crews used excavators north of SR 520 in Bellevue to continue work on a new stormwater treatment pond.
All is a quiet on the lake as crews prepare to launch a 660-ton coffer cell as part of Cycle 1 pontoon repairs.
When attached to the ends of Pontoons U and V, the coffer cell will serve as a portable drydock. Once in place, crews will pump water out of the coffer cell so they have a dry work environment to complete repairs.
As 2013 came to a close, construction crews worked on completing the pier table on the south column of Pier 1. Working high above Lake Washington, crews get a different perspective of the steel truss on the east approach of the current SR 520 bridge.
This aerial shot shows a top-down view of the floating bridge’s northeastern sentinel and one of the viewpoints, or belvederes, on the SR 520 trail.
Crews have begun laying the foundation for the new bridge maintenance facility. The three-story, LEED Silver certified facility will be located beneath the new east approach allowing maintenance crews direct access to the bridge.
Pontoon R is a longitudinal pontoon, which means there is just over one foot of clearance between the pontoon and the side of the lock wall. Safely moving the pontoon through the locks requires careful monitoring.
Crews secure Pontoon D to the tugboat West Point in preparation for float-out from the casting basin in Aberdeen late Tuesday night.
Construction crews working on the SR 520 Pontoon Construction Project took advantage of an extra-high tide April 15, 2014, to float six concrete pontoons into the Chehalis River. These six pontoons represent the fourth of six construction cycles being built in Aberdeen and are destined for Lake Washington to form the backbone of the new SR 520 floating bridge.
Construction crews in Aberdeen worked through the night to ensure a successful float-out of the newest six pontoons for the new SR 520 floating bridge.
Construction crews working on the SR 520 Pontoon Construction Project took advantage of an extra-high tide April 15, 2014, to float six concrete pontoons into the Chehalis River. These six pontoons represent the fourth of six construction cycles being built in Aberdeen and are destined for Lake Washington to form the backbone of the new SR 520 floating bridge.
Crews worked together to move the heavy steel rebar that will be part of the third cycle of pontoons built in Aberdeen. Photo taken June 20, 2013.
Construction crews are underway on the third cycle of SR 520 bridge pontoons in Aberdeen. In this cycle, crews will build six total pontoons:
• Four longitudinal pontoons (360 ft. x 75 ft. x 29 ft.)
• Two supplemental stability pontoons (98 ft. x 60 ft. x 28 ft.)
Our first pedestrians took to the SR 520 floating bridge path on July 22, 2016. The path is now open to all users as an out-and-back path from Medina.
In summer 2017, the path will connect to the Montlake area in Seattle.
Photo © Tristan Savatier - All Rights Reserved - License this photo on www.loupiote.com/11432864885
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Hindu devotees on Pontoon floating bridge, at the Kumbh Mela 2013 festival near Allahabad (India).
This was the morning of Kumbh Maha Snan or main bathing day, also called Mauni Amavasya, which is the the most auspicious morning for taking the holy bath in the Ganges river.
Kumbh Mela is the largest festival on Earth, taking place once every 12 years, with more than 50 million Hindu pilgrims gathering to pray and bathe in the holy Ganges river.
For more photos and info about the Kumbh Mela festival, read the album description.
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The former chain ferry from Cowes now appears to be laid up at Gosport with a foot ferry currently operating in Cowes until a replacement car ferry is delivered in 2018.
SR 520 Program Administrator Julie Meredith talks to the media about the upcoming floating bridge Grand Opening celebration. More information about the event is coming soon!
For more information, visit www.520golong.com.
In December 2013 crews joined Pontoon V with the coffer cell to complete crack repairs. Working inside the coffer cell means that crews are working beneath the 11,100 ton pontoon more than 25 feet below the surface of Lake Washington.
Crews worked through a cold and rainy day in Aberdeen, Washington, pumping concrete from a nearby truck into the closure gap between the interior walls of a new pontoon destined for Seattle. Photo taken Dec. 12, 2013.
Construction crews are underway on the fourth cycle of SR 520 bridge pontoons in Aberdeen. In this cycle, crews will build six total pontoons:
• Four longitudinal pontoons (360 ft. x 75 ft. x 29 ft.)
• Two supplemental stability pontoons (98 ft. x 60 ft. x 28 ft.)
Crews prepare to add the top deck to the north column at Pier 2 and to add the first pair of segments to the south column.
Segmental bridges are constructed using form travelers, seen here in blue.
Pier 2 is a land-based pier in Medina.
Under gray skies construction crews are busy working to complete the east approach and landing of the new SR 520 floating bridge.
On Thursday, Aug. 22, crews floated Pontoon T out of the drydock in Portland, Ore. Here you can see the pontoon, drydock and support vessels as they begin to lower the pontoon into the Columbia River.
After a four day journey from Aberdeen, Pontoon G enters the Hiram M. Chittenden Locks in Ballard. Pontoon G is the 75th pontoon to arrive in Seattle out of the 77 pontoons needed for the new SR 520 floating bridge. Build your own Pontoon G by visiting our website.
More information about the new SR 520 floating bridge is available on our website.