SR 99 Tunnel

sr 99 tbm Editor’s Message: Improving Tunneling
Jim Rush
November 15, 2018
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Editor's Message sr-99
A Big Break Through
June 21, 2017
Cover Stories Bertha breaks through near space needle
Bertha’s 9,270-ft Journey Under Seattle for SR 99
May 31, 2017
News SR 99 TBM
Seattle Tunnel Partners Set to Repair Damaged Pier
February 8, 2016
News SR 99 Crews Progressing Toward TBM Re-launch
SR 99 Crews Progressing Toward TBM Re-launch
November 25, 2015
News SR 99 Tunnel Update: TBM Testing Underway
SR 99 Tunnel Update: TBM Testing Underway

Seattle Tunnel Partners (STP) and manufacturer Hitachi Zosen have begun testing components of the SR 99 tunneling machin...

November 16, 2015
News SR 99 Update: Bertha to Resume Mining Dec. 23
SR 99 Update: Bertha to Resume Mining Dec. 23

According to the Washington State Department of Transportation (WSDOT) website, Seattle Tunnel Partners (STP), the contr...

October 29, 2015
News SR 99 Reconnecting Bertha
SR 99 Tunnel Update: Bertha’s Front End Reconnected

Seattle Tunnel Partners has reconnected the SR 99 tunneling machine’s 2,000-ton front end to the section that rema...

September 1, 2015
News SR 99 tunneling machine
New Schedule Submitted for SR 99 Project: Tunneling to Resume...

This week, Seattle Tunnel Partners began installing a new main bearing on the SR 99 tunneling machine. Installation of t...

July 17, 2015
News SR 99 Update: TBM Repairs and Settlement Reports
SR 99 Update: TBM Repairs and Settlement Reports

The Washington State Department of Transportation (WSDOT) on May 18 posted on its website updates about the SR 99 TBM re...

May 19, 2015
News SR 99 Tunnel Nerve Centers Taking Shape
SR 99 Tunnel Nerve Centers Taking Shape

State-of-the-art systems will be the key to maximizing safety and efficiency inside the SR 99 tunnel. Lighting and intel...

May 6, 2015