Tag Archive for Lake Washington

New SR 520 floating bridge taking shape

SEATTLE – The new State Route 520 floating bridge has begun its march across Lake Washington. Late last week, construction crews completed the first joining of two immense, concrete pontoons that will support SR 520 as it crosses the water.

Contractor crews working on the SR 520 Floating Bridge and Landings Project used 80 bolts, each 16 to 20 feet long and close to 800 pounds, to secure Pontoon V to Pontoon W near Lake Washington’s Medina shore. …read more

From: WSDOT Northwest Travel News

Category: Uncategorized, alerts, canceled, state, type

Expect delays on both sides of Lake Washington due to weekend road work

Work on several major roadways is expected to have a ripple effect for traffic on both sides of Lake Washington this weekend. …read more

From: WSDOT Northwest Travel News

More State Route 520 floating-bridge pontoons arriving at Lake Washington

SR 520 Bridge

SEATTLE – More pontoons for State Route 520’s new floating bridge are about to arrive in Lake Washington.

The first of two supplemental pontoons being towed this week from Tacoma to Lake Washington was scheduled to reach the Hiram M. Chittenden Locks late this afternoon or early evening, Wednesday. Tug boats then will guide the massive concrete box through the Lake Washington Ship Canal before reaching the lake’s western shore. A second Tacoma-built supplemental pontoon is scheduled to arrive Thursday afternoon.

“We’re well past the halfway point with pontoon construction” said Julie Meredith, director of the Washington State Department of Transportation’s SR 520 Bridge Replacement and HOV Program. “We’re seeing strong progress in every phase of the highway program.”

The two pontoons arriving this week will be the 31st and 32nd pontoons towed to Lake Washington as part of construction of the new floating bridge. To date, 46 of the new bridge’s 77 pontoons have been constructed.

Six additional pontoons under construction in kbkw.com/tag/aberdeen” title=”View all articles about Aberdeen here”>Aberdeen are scheduled to be completed this spring. Other already-built pontoons now moored in kbkw.com/tag/aberdeen” title=”View all articles about Aberdeen here”>Aberdeen will be towed to Lake Washington later this spring.

Meredith noted that construction of the floating bridge’s 766 concrete deck panels began in February in Kenmore and that work on the Eastside Transit and HOV Project will wrap up later this summer, just as construction begins on a new, 1.1-mile-long bridge linking the new floating bridge with Seattle’s Montlake neighborhood. She also pointed out that the interim West Connection Bridge should be completed this fall, while the new floating bridge is scheduled to open in spring 2016.

You can find more online about the different types of SR 520 pontoons and track the status of their construction. You also can track tugboat Terilyn and view the general Puget Sound location of the pontoons on their trip from Tacoma to Seattle. A map of suggested viewing locations along the ship canal also can be found online.

Additional information about the SR 520 Pontoon Construction Project also is available online.

About supplemental pontoons
Supplemental pontoons flank either side of the floating bridge to give the structure added stability and flotation. The supplemental pontoons are 98 feet long, 28 feet high and 50 to 60 feet wide. Their weight ranges between 2,650 and 3,000 tons. By comparison, the bridge’s longitudinal pontoons, which lie directly under the bridge deck, are 360 feet long, 75 feet wide, 28.5 feet tall, and weigh 11,000 tons.

More floating-bridge pontoons arriving on Lake Washington

SEATTLE – More pontoons for State Route 520’s new floating bridge are about to arrive in Lake Washington.

The first of two supplemental pontoons being towed this week from Tacoma to Lake Washington is scheduled to reach the Hiram M. Chittenden Locks late this afternoon or early evening, Wednesday, March 12. Tug boats then will guide the massive concrete box through the Lake Washington Ship Canal before reaching the lake’s western shore, likely in midevening. A second Tacoma-built supplemental …read more

From: WSDOT Northwest Travel News

Body recovered from Lake Washington in Seattle

SEATTLE (AP) — Seattle police say the body of a man who fell off a sailboat Jan. 11 has been recovered from Lake Washington…. …read more

From: AP Washington News

    

WSDOT recaps 2013 pontoon progress, raises 12th man flag for Seahawks

Crews working to build the new SR 520 floating bridge show their support for the Seahawks at the construction work zone in Medina.

The Washington State Department of Transportation is looking back at 2013, and tells KBKW crews made major progress building the new SR 520 corridor last year. From multiple pontoon float-outs in Aberdeen and Tacoma to nearing completion of the highway’s Eastside enhancements to preparing for the next phase of construction in Seattle, the past year was busy.

The department has compiled all the 2013 highlights in a year-in-review newsletter. You can find several notable accomplishments “By The Numbers,” from bridge anchors set on the bed of Lake Washington (58) to girders set for new Eastside overpasses (more than 300!). You’ll also see the key milestones reached each month, from January through December.

2014 promises to be just as busy. This spring, the fourth cycle of completed pontoons from Aberdeen is expected to float out. In the summer, the new Eastside corridor should open to drivers, and construction is set to begin for the highway’s next phase in Seattle, the West Approach Bridge North. Bridge assembly will continue all year on Lake Washington, as pontoons are joined to one another to form the new floating bridge.

Crews working to build the new SR 520 floating bridge show their support for the Seahawks at the construction work zone in Medina.

Crews working to build the new SR 520 floating bridge show their support for the Seahawks at the construction work zone in Medina.

Crews working on the new SR 520 floating bridge took a brief pause on Jan. 14 to show their spirited support of the Seattle Seahawks and their playoff run. Workers stood atop a pier for the new east approach bridge structure in Medina and proudly draped the “12th Man” flag. Best of luck to the Seahawks this weekend as they take on the 49ers at Century Link field. Go Hawks!

Man goes overboard in Lake Wash., presumed dead

SEATTLE (AP) — Authorities say a man is presumed dead after he fell from a sailboat in Lake Washington…. …read more

From: AP Washington News

    

WSDOT to fund added SR520 costs with additional revenue

WSDOT 520 Orange

OLYMPIA – The Washington State Department of Transportation announced it has reached agreement with its pontoon contractor for added costs associated with building pontoons for the new State Route 520 floating bridge.

In late December WSDOT executed five new change orders for the SR 520 Bridge Replacement and HOV Program with its pontoon and floating bridge contractors. These change orders total $42.65 million, of which $37.1 million is with Kiewit-General Joint Venture for the redesigned pontoon work on Cycles 3 through 6.

In a media briefing today, Washington Transportation Secretary Lynn Peterson and SR 520 Program Director Julie Meredith said WSDOT’s pontoon design error is consuming much of the SR 520 program’s $250 million risk reserve. One additional change order associated with the pontoon design error is expected in the next month and will likely bring the total cost associated with the pontoon design mistake to approximately $200 million. WSDOT also has signed or identified expected change orders worth $134.3 million related to other construction in the corridor.

With the signed and expected change orders, plus WSDOT’s thorough analysis of the potential future risks associated with the remaining $800 million in funded construction, the agency has determined that approximately $170 million in additional project funding is required. Peterson said the agency has identified existing funding sources to cover these costs and keep the bridge-replacement project on track. 

WSDOT has determined that most of the needed construction funds can be obtained from available SR 520 toll bonding capacity, with other existing agency resources providing the remaining funds, dependent on legislative approval.

The SR 520 program’s legislatively authorized budget currently is capped at $2.72 billion. The budget covers three major projects: Eastside improvements to the SR 520 corridor from Medina to Redmond; the new floating bridge and bridge landings; and pontoon construction. The addition of transit/HOV lanes in both directions from Seattle’s Montlake neighborhood to I-5, along with other corridor enhancements on that stretch of highway, remains unfunded. WSDOT will work with the Legislature to request authority to change the program budget from $2.72 billion to $2.89 billion.

“The original pontoon design included an unfortunate and costly mistake,” Peterson said. “While the error discovered in 2012 is depleting most of the contingency reserve, we are proactively managing the remaining risks and don’t foresee the need for new funding sources to complete the work at hand and move our region closer to a safer, higher-capacity, multimodal 520 corridor.”

In 2012, WSDOT determined that repairs and modifications were needed on four pontoons from Cycle 1 as a result of a design error. In addition, all remaining pontoons required either modifications or construction using an updated design. WSDOT contractors have since completed repairs on two of the four Cycle 1 pontoons, and will complete repairs on the remaining two pontoons this spring.

When complete, the SR 520 program will replace the existing, 50-year-old SR 520 bridge across Lake Washington with a safer structure, dedicated lanes in each direction for buses and high-occupancy vehicles, a separate path along the highway corridor for bicyclists and pedestrians, and environmental improvements along SR 520 between I-5 in Seattle and SR 202 in Redmond. The new floating bridge is expected to open to traffic in late 2015 or early 2016.

More information about the SR 520 Bridge Replacement and HOV Program is available at www.wsdot.wa.gov/projects/sr520bridge.

State needs $170 million more to finish 520 bridge

By By MIKE BAKER SEATTLE (AP) — State officials say they need $170 million more to complete a replacement of the Highway 520 floating bridge on Lake Washington…. …read more

From: AP Washington News

    

Fourth cycle of SR 520 supplemental pontoons nearly complete in Tacoma

Six more SR 520 pontoons wait for high tide in Tacoma

OLYMPIA, Wash – Washington State Department of Transportation crews move closer to another project milestone as the finishing touches are made to the fourth cycle of Tacoma-built pontoons for the new SR 520 floating bridge. These eight new pontoons are scheduled to be towed out of their casting basin into Commencement Bay over a period of four days. The pontoons will be floated out in pairs – the first two on Dec. 26, the last two on Dec. 30 – and then moored for later towing to Lake Washington.

The eight new supplemental pontoons will help provide stability and flotation when attached to much longer, longitudinal pontoons built in Aberdeen. The bridge’s supplemental pontoons each weigh 2,500 to 2,820 tons and measure 98 feet long, 50 to 60 feet wide, and about 28 feet tall.

Six more SR 520 pontoons wait for high tide in Tacoma

Six more SR 520 supplemental stability pontoons are towed out of their Tacoma casting basin in pairs each evening, as the high tides allow.

In all, 44 Tacoma-built pontoons and 33 pontoons built in Aberdeen will support the world’s longest floating bridge. With these eight newest pontoons, WSDOT so far has completed 46 of the bridge’s 77 pontoons. Thirty of these have already arrived at their final destination on Lake Washington.

Stay tuned for photos once the float-out process is complete, and check out our Pontoon Tracking Web page for the latest details about upcoming pontoon movements as they are made available.