Seattle used Bertha, the tunnel boring machine, to create the Highway 99 tunnel. Traffic is very light. The tunnel opened to State Route 99 traffic on Feb. 4, following a weekend grand opening celebration, where the public had an opportunity to walk through the tunnel and learn more about the plans for Waterfront Seattle, a public park that will be developed along the site of the viaduct. [35] In December 2014, workers began digging a 120-foot-deep (37 m) pit in order to lift Bertha's front end up to street level for repairs,[36] but were delayed when groundwater pumping caused visible damage to nearby South King Street and some of its neighboring buildings. subsidiary of Dragados, S.A., the construction division of ACS Group of Spain; and Tutor Perini Corporation, based in Sylmar, California. The completed tunnel opened to traffic on Feb. 4, 2019 following a weekend grand opening celebration where the public had an opportunity to walk through the tunnel and learn more about the city’s plans for the waterfront—a section of the city that had long been cut off from the rest of the city by the unwieldy and noisy viaduct. The machine was 326 feet (99 m) long and weighed 6,700 short tons (6,100 t). “The tunnel is very, very deep in the middle, and adding downtown exits was just impractical with the alignment of the tunnel,” says Brian Russell, SR 99 project manager for HNTB Corp., which is the lead designer on the tunnel project and part of a design-build team that also includes Dragados USA and Tutor Perini Corp. She's now in Zone 4 of the tunnel drive", "Bertha is now in Zone 5 of the tunnel drive", "Monday tunneling update: Bertha has reached zone 6", "Bertha is past Stewart St. & the 1-mile mark", "#BalloonsOverBertha at 2nd/Lenora. [17] Test assembly and shakedown on Bertha in Japan indicated issues with the main-drive unit and tolerances that required repairs in February 2013. Of that total cost, the 2012 Legislature stated $200 million must come from toll funding," WSDOT says.The Washington State Transportation Commission is responsible for setting toll rates: "The WSTC will consider multiple factors in order to determine the best rate to minimize traffic diversion onto other roads but still generate necessary revenue for the tunnel. The tunnel opened to traffic in both directions just around midnight the morning of Monday, February 4. There is more than a year’s worth of work left in its 9,270-foot-long wake. ", "March 9 project update: New 360-degree video takes you inside the tunnel as Bertha enters Zone 10", "Seattle tunnel tops U.S. green group's 'boondoggle' list", "Seattle's unbelievable transportation megaproject fustercluck", "Bertha: Off the hook in the Legislature but not out of mind", The World's Largest EPB Shield Tunneling Machine, https://en.wikipedia.org/w/index.php?title=Bertha_(tunnel_boring_machine)&oldid=991208724, Articles containing potentially dated statements from December 2016, All articles containing potentially dated statements, Creative Commons Attribution-ShareAlike License, This page was last edited on 28 November 2020, at 21:37. In August 2015, a consortium of eight insurers filed a lawsuit against STP in order to avoid a $143 million payout to cover the cost of repairs to the boring machine. Construction began in July 2013 using " Bertha ", at the time the world's largest-diameter tunnel boring machine. Seattle Digs a Cave For the Future", "WSDOT Statement on SR 99 Tunneling Machine", "Tunnel crews lowering groundwater to get a closer look at what's blocking Bertha", "Contractor ordered to pay Washington state $57M over tunnel-boring machine Bertha;s big stall", "Prosaic Pipe Stymied Seattle's Big Bertha", "SR 99 tunneling machine to resume digging in March 2015", "Actually, digging continued Tuesday at Bertha's repair pit", "New delay in Bertha rescue as engineers study sinking soil", "Bertha's mammoth cutter head emerges from tunnel vault", "New estimate of tunnel opening: August 2017", "Seattle Tunnel Partners submits new schedule for completing SR 99 Tunnel Project", "New Bertha start date to resume digging is Nov. 23", "Bertha repair will take longer – there are lots of broken parts", "Aug. 24 project update: Seattle Tunnel Partners planning to lower Bertha into the access pit today", "Crews start moving Bertha's rebuilt cutter drive back into pit", "Bertha's builders: Tunnel borer started out 'perfect, "Jan. 7 project update: Bertha exits the access pit", "Bertha making progress, tunnels 73 feet since repairs", "Bertha stops digging again, but this time it's because of a barge", "Sinkhole adds to Bertha's problems, but drilling to resume", "While Bertha halts over barge issues, sinkhole opens near access pit", "Inslee orders tunnel dig halted as soil sinks above Bertha", "Jan. 14 project update: Tunneling on hold pending safety review", "Gov.