Advisories and Updates

Advisories and Updates

Below is an archive of advisories and progress updates about our work to replace the State Route 99 Alaskan Way Viaduct. An archive of posts featured in our "Program Spotlight" can be found here.

2014

August 27, 2014 - SR 99 reopens to traffic on time Wednesday

August 22, 2014 - Sharing the road during the four-day closure of SR 99 

July 28, 2014 - Seattle Tunnel Partners schedule update: Construction of the access pit's underground walls will continue through August

July 25, 2014 - Seafair Torchlight Run to close northbound lanes of the viaduct Saturday evening

July 11, 2014 - Early warning: Four-day closure of SR 99 coming in late August

July 10, 2014 - Come visit us this weekend at West Seattle Summer Fest and Ballard Seafood Fest

June 18, 2014 - Northbound SR 99 closed through downtown Seattle this weekend

June 16, 2014 - Contractor announces details of repair work plan for the SR 99 tunneling machine

May 30, 2014 - Southbound SR 99 to close through Seattle during the first full weekend in June

May 30, 2014 - Mercer Corridor Project bidding adieu to Broad Street

May 19, 2014 - Three traffic signals out on Alaskan Way

May 16, 2014 -- Planned power outage will affect some traffic signals this weekend on Alaskan Way

May 16, 2014 -- Southbound SR 99 lane, off-ramp closures set for Saturday near Seattle's stadiums

May 13, 2014 -- Construction of access pit's underground walls now underway

May 8, 2014 -- With environmental review complete, access pit construction begins in earnest

April 29, 2014 -- A summary of change orders on the SR 99 Tunnel Project

April 21, 2014 -- SR 99 tunneling machine to resume digging in March 2015

April 18, 2014 -- New photo feature: Before and After

April 18, 2014 -- Overnight on-ramp and lane closure Monday on SR 99/Aurora Avenue North

April 3, 2014 -- Setting the stage for Bertha's repairs

March 31, 2014 -- Milepost 31 Speaker Series on Thursday: Bertha and Progress on the SR 99 Tunnel Project

March 18, 2014 -- Reminder: Follow-up viaduct inspection set for Saturday, March 22

March 13, 2014 -- Seattle Tunnel Partners submits repair plan, archaeological surveys underway

March 13, 2014 -- Construction, St. Patrick's Day Dash to impact traffic this weekend on SR 99

March 10, 2014 -- Follow-up viaduct inspection scheduled for March 22

Feb. 28, 2014 -- A week in review: Bertha repair plan, ERP’s 2014 report and a viaduct weekend closure reminder

Feb. 27, 2014 -- How is an early or late tunnel opening addressed in the design-build contract?

Feb. 25, 2014 -- Ground settlement near the viaduct is safe, expected

Feb. 21, 2014 -- Seattle Tunnel Partners will dig access shaft to reach tunneling machine

Feb. 20, 2014 -- Weekend closure coming to northbound SR 99 lane and ramp near Seattle’s stadiums

Feb. 14, 2014 -- Repair plan to be finalized by the end of February

Feb. 12, 2014 -- Video of Tuesday's news conference

Feb. 10, 2014 -- Accessing the seal system inside the tunneling machine

Feb. 7, 2014 -- Two factors contributed to tunnel stoppage

Jan. 31, 2014 -- Further evaluation required before tunneling can resume

Jan. 28, 2014 -- SR 99 tunneling machine inches forward

Jan. 27, 2014 -- South Atlantic Street overpass open to traffic

Jan. 27, 2014 -- Restart of tunneling machine begins this week; evaluation will follow initial mining

Jan. 23, 2014 -- Hyperbaric investigations continue

Jan. 22, 2014 -- Relief in sight for drivers near the Port of Seattle's busiest freight terminal

Jan. 21, 2014 -- Hyperbaric inspections continue

Jan. 17, 2014 -- Crews begin inspecting excavation chamber

Jan. 16, 2014 -- Working with Seattle Tunnel Partners to resume tunneling

Jan. 16, 2014 -- Tunnel's north access contract awarded

Jan. 14, 2014 -- Diving deeper into the tunneling stoppage

Jan. 13, 2014 -- Filling in shaft number three

Jan. 10, 2014 -- Exploratory shaft work continues

Jan. 9, 2014 -- Still too early to talk timeline

Jan. 8, 2014 -- Crews continue drilling exploratory shafts

Jan. 7, 2014 -- Crews begin drilling shafts in front of Bertha

Jan. 3, 2014 -- Progress made in search for tunnel blockage

 

2013

Dec. 20, 2013 -- We won't know more about Bertha's blockage until 2014

Dec. 13, 2013 -- Tunnel crews lowering groundwater to get a closer look at what's blocking Bertha

Dec. 5, 2013 -- Seattle Tunnel Partners: Almost the proud owners of the world's largest tunneling machine

Dec. 3, 2013 -- Mercer Corridor Project to close SR 99 and Mercer Street next two weekends

Nov. 25, 2013 -- Bertha has much to be thankful for as she nears South Jackson Street

Nov. 14, 2013 -- Bertha takes on the complexities of King Street

Nov. 13, 2013 -- Tunnel and overpass construction to close State Route 99 ramps and lane in SODO this weekend

Nov. 8, 2013 -- State Route 99 to close this weekend through Seattle

Nov. 7, 2013 -- Several days at the dentist: new teeth will give Bertha more bite

Oct. 30, 2013 -- Bertha begins her week of scheduled maintenance

 

Oct. 24, 2013 -- Bertha closing in on King Street

 

Oct. 16, 2013 -- SR 99 tunneling machine passes 300-foot mark

Sept. 30, 2013 -- Alaskan Way Viaduct reopens early, Aurora Avenue North remains closed

Sept. 30, 2013 -- Milepost 31 Speaker Series -- Archaeology and the Alaskan Way Viaduct Replacement Program

Sept. 25, 2013 -- The SR 99 tunneling machine digs again

Sept. 18, 2013 -- Back to work for Bertha

Sept. 12, 2013 -- Mercer Corridor Project: overnight closures of northbound SR 99, eastbound Mercer Street scheduled for Sept. 17

Sept. 4, 2013 -- Thursday at Milepost 31 – Learn about the buildings that support the tunnel systems

Aug. 27, 2013 -- Canceled: Sept. 6-7 closure of northbound SR 99, Mercer Street

Aug. 22, 2013 -- Aurora Bridge lane closures Aug. 24 - 25

Aug. 16, 2013 -- Mercer Corridor Project: Monday and Tuesday Night - Lane restrictions on Fairview Avenue North and I-5 Mercer Street off-ramps

Aug. 14, 2013 -- SR 99 closures for South Spokane Street Overcrossing work Aug. 16 - 17

July 29, 2013 -- Milepost 31 Speaker Series - Tracking Bertha's Progress Beneath Downtown

July 25, 2013 -- Seafair Torchlight Run to close northbound lanes of the viaduct Saturday evening

July 1, 2013 -- Mercer construction to close SR 99, Mercer Street this weekend

June 25, 2013 -- Street and Transit Update – A Waterfront Seattle Event

June 19, 2013 -- Rock ‘n’ Roll Seattle Marathon to close part of northbound SR 99 this Saturday

June 11, 2013 -- Southbound lanes of Battery Street Tunnel to close overnight Thursday, June 13

May 31, 2013 -- Northbound SR 99 on-ramp from South Royal Brougham Way closed Sunday, June 2

May 29, 2013 -- Milepost 31 Speaker Series – Operating the SR 99 tunneling machine

May 20, 2013 -- New Traffic Configuration of SR 99 and Mercer Street Now in Effect

May 13, 2013 -- Major Construction on Mercer West to Begin: Weekend closure of SR 99 and Mercer Street

May 6, 2013 -- Seattle Mother’s Day: Score FREE Parking at Waterfront Garages

May 1, 2013 -- Milepost 31 Speaker Series on Thursday: Preparing for Bertha's Launch

April 26, 2013 -- Elliott Bay Seawall Project: Alaskan Way to be closed this weekend between Virginia to Pike streets

April 18, 2013 -- Overnight lane closures scheduled for SR 99 Battery Street Tunnel week of April 22

April 15, 2013 -- SR 99 lane restrictions to begin Monday, April 22 as part of Mercer Corridor Project

March 28, 2013 -- April 4 Walking Tour: View of the SR 99 Tunnel Launch Pit

March 26, 2013 -- SR 99 off-ramp in SODO closed Easter weekend

March 2, 2013 -- SR 99 Alaskan Way Viaduct open, Aurora Avenue North to close Sunday morning March 3

March 1, 2013 -- Lane reductions on SR 99 near the West Seattle Bridge for Spokane Street Overcrossing Project

Feb. 25, 2013 -- Viaduct to close this weekend for semiannual inspection

Feb. 22, 2013 -- Three blocks of lane reductions on First Avenue in downtown Seattle week of Feb. 25

Feb. 22, 2013 -- Impacts to SR 99 the weekend of Feb. 23

Feb. 15, 2013 -- Lane reductions, parking closures on First Avenue in downtown Seattle week of Feb. 18

Feb. 8, 2013 -- Lane reductions, parking and sidewalk closures on First Avenue in downtown Seattle week of Feb. 11

Feb. 1, 2013 -- Lane reductions on one block of First Avenue in downtown Seattle week of Feb. 4

Jan. 25, 2013 -- Lane reductions on one block of First Avenue in downtown Seattle next week

Jan. 14, 2013 -- SODO overpass work will close State Route 99 on weeknights for next three weeks

 

2012

Dec. 21, 2012 -- Testing time for State Route 99 tunneling machine

Dec. 18, 2012 -- SODO overpass construction closes State Route 99 off-ramp this weekend

Dec. 3, 2012 -- Section of Railroad Way South to close Wednesday and Thursday

Dec. 3, 2012 -- Section of First Avenue South closed Monday and Tuesday

Dec. 3, 2012 -- Milepost 31 turns one

Nov. 27, 2012 -- Nighttime bike/ped path detour this week near Pioneer Square

Nov. 6, 2012 -- Road closures near the SR 99 tunnel's future north portal

Nov. 6, 2012 -- Overnight closures on First Avenue South through Thursday

Oct. 16, 2012 -- Watch us make history

Oct. 16, 2012 -- Section of Sixth Avenue North now closed

Oct. 16, 2012 -- Overnight closures this week on First Avenue South

Sept. 19, 2012 -- Join us today at Seattle Center to see the future of Seattle's waterfront

Aug. 23, 2012 -- Milepost 31 Speaker Series: Protecting buildings during SR 99 tunnel construction

June 5, 2012 -- Long-term lane closure coming to southbound SR99/Aurora Avenue N.

June 5, 2012 -- East Marginal Way S. Reduced to two lanes