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Seattle Light Rail

  Central Puget Sound Regional Transit Authority appraising bids for design/build of tunnels and deep stations from Convention Place to 45th St station. Prequalified bidders are Modern Transit Constructors (Modern Continental/SA Healy/Impregilo/Hochtief/Parsons/Robison); Obayashi (Obayashi/Atkinson/Jacobs); Puget Link Constructors (Traylor/Shea/Frontier-Kemper); and Puget Sound Constructors (Hatch Mott MacDonald/Sverdrup/Sauer/Golder). March 2000.   The design/build contract for the Puget Sound tunnels and deep stations will be bid in late February 2000. Prequalified joint ventures are: Modern Transit Constructors (Modern Continental, S.A.Healy/Impregilo, Hochtief Ag, Parsons Transportation Group and Robison Construction); Obayashi (Obayashi Corp., Atkinson Construction, with Jacobs Associates Design Consultant); Puget Link Constructors (Traylor Bros. Inc., J.F. Shea Co. Inc., Frontier Kemper Constructors Inc.); Puget Sound Constructors, LLC and Hatch Mott McDonald-Sverdrup JV design consultant, Dr. G. Sauer- design sub consultant and Golder Associates- Geotechnical Sub consultant). March 2000. The Obayashi/Atkinson team is reported to have dropped out, and it is reliably reported that there are only two remaining of the four prequalified teams that were competing for this design/build project. June 2000. Modern Transit Constructors has been chosen as contractor-elect to design and build the 7.2 km-long Central Link light rail tunnel in Seattle, WA. The contract will be for the twin-bore tunnels only and does not include trackwork, signals and power. Negotiations are proceeding with Modern Transit Constructors with a view to awarding the contract by early-November. The joint venture is led by Modern Continental, with S A Healy, Impregilo, Parsons Transportation, Robison and Dumez-GTM. The runner-up team, Puget Link Construction comprises Traylor Brothers, J.F. Shea, Frontier-Kemper and Atkinson Construction, with Hatch Mott McDonald-Sverdrup JV as design consultant and Golder Associates as geotechnical subconsultant. Visit www.soundtransit.org Sept 2000.Negotiations with Modern Transit Constructors, a consortium headed by Modern Continental Construction Co. Cambridge, MA, with S.A. Healy, McCook, IL; Impregilo, Italy; Dumez-GTM, France; Parsons Transportation Group, Pasadena, CA and Roison Construction Group, Sumner, WA are reported to have been suspended due to potential cost overruns. The proposed design-build subway tunnel was more than $200 million over the Transit Agency budget estimate of $557 million. The board will study new options on construction methods to reduce cost. Visit www.soundtransit.org and www.moderncontinental.com December 2000.There are two bids to build a light rail tunnel through Beacon Hill as part of contract 710 of the 22.4 km initial segment from Convention Place in downtown Seattle to Tukwila. However, the lowest bid from Obayashi is USD280 million, USD41 million higher than Sound Transit's USD239 million estimate. The other bid is from Kiewit and its partners Traylor, Frontier Kemper and Beton und Monierbau in Beacon Hill Constructors with USD305 million. The project includes the entire tunnel and station complex, consisting of a 15.24 m-diameter main shaft to house the elevators leading to the concourse tunnel connecting a 5.75 m-inner diameter 1.6 km twin tunnel, a 9 m-diameter auxillary shaft to house emergency stairs, a ventilation adit, cross passages, surface buildings, architectural finishings, landscaping, mechanical and electrical work, elevators, ventilation fans, etc., except systems work (power supply and communications, etc.). The contract also includes the adjacent McClellan station (aerial station and aerial guideway at the east portal and aerial guideway at the west portal). A 30 m-deep shaft has been sunk to investigate the Beacon Hill tricky glacial soils. Contract to be awarded by end of May or June 2004 for start of station excavation at fall 2004 and start of tunnel boring with EPB TBMs in 2005. Subscribe to E-News Weekly 30/2003 & 13/2003. Visit www.soundtransit.org 22/04.Sound Transit has awarded URS Corporation a three-year contract to provide construction management services for the Downtown Seattle Transit Tunnel (DSTT) project. The project is part of the 22.5 km Central Link. The light rail will travel under downtown, sharing the 13-year-old tunnel with buses. The 2.1 km tunnel was built with rails for future light rail. However, they need to be insulated from the ground, and the roadbed is 15.2 cm too high to accommodate trains and newer buses. The tunnel will remain closed for two years for a retrofit that includes a new short cut-and-cover "stub tunnel" at Pine Street where trains can stop and turn around. All the buses that now use the tunnel will return to the surface during construction. URS will manage the DSTT retrofit totalling approximately USD60 to USD80 million in construction. Other work includes upgrades and improvements to the mechanical, electrical, fire, and safety systems, a state-of-the-art communications system, and a new integrated signalling system for both buses and trains. Construction is scheduled for completion in June 2007. Read E-News Weekly 22/2004. Visit www.urscorp.com and www.soundtransit.org 23/04.Balfour Beatty Construction bid USD82.7 million to retrofit the 2.1 km downtown Seattle bus tunnel for joint rail-bus use, which is nearly USD11 million (12%) less than Sound Transit's estimate. The contract, which includes construction of a short, dead-end tunnel under Pine Street, is a major component of Sound Transit's 22.5 km light rail line from downtown Seattle to Tukwila. Preliminary work on the new Pine Street stub tunnel between Seventh and Terry avenues could start in about four months. That tunnel will provide space for trains to turn around. The entire tunnel project is estimated to take 21 months. Visit www.soundtransit.org and www.balfourbeatty.com 30/04.Northlink Transit Partners, a joint venture of Earth Tech, HNTB, and Jacobs Associates, was awarded a USD38.9 million contract by Sound Transit for the final design of the University Link light rail extension. The 5.1 km extension will run in tunnel from Westlake station to the University of Washington, with stations at Capitol Hill and on the UW campus near Husky Stadium. The final design project includes a tunnel crossing under the Lake Washington Ship Canal between Portage Bay and Union Bay. Earth Tech's responsibilities will include providing project control systems, managing the design of the two rail stations, tunnel ventilation, mechanical and electrical systems. The project is expected to take two years to complete. Construction is scheduled to begin at fall 2008, with service starting in 2016. Read E-News Weekly 50/2006, 24/2004 & 13/2003. Visit www.soundtransit.org/x1171.xml, www.earthtech.com, www.hntb.com and www.jacobssf.com 03/07.Jacobs Engineering Group announced that the Seattle Tunnel and Rail Team (START), a joint venture between Jacobs and CH2M Hill, has been selected to receive a construction management services contract from Sound Transit to extend light rail service to connect the region's three most densely populated urban centres in Washington state (downtown Seattle, Capitol Hill/First Hill and the University district). The 5.1 km project entails constructing two parallel tunnels that run northward from Westlake to the University of Washington, with stations at Capitol Hill and on the University of Washington campus near Husky Stadium. It is anticipated that the new addition will start operation in 2016 and add 70,000 daily riders to the regional light rail system. Visit www.jacobs.com, www.ch2m.com and www.soundtransit.org/x1171.xml 29/08.Initial contract for site preparation on University Link awarded to West Coast contractor Condon-Johnson & Associates, www.condon-johnson.com/seattle/, value EUR13.93 million. Contact Eric Dybevik, tel +1 206 575 8248, e-mail edybevik@condon-johnson.com. Meantime, voter approval gained for 58 km-long expansion of Link light rail system with 19 stations including 20 km extension north from University of Washington to Lynnwood with underground stations at Brooklyn and Roosevelt. Contact Jeff Munnoch jeff.munnoch@soundtransit.org or visit www.soundtransit.org. 52/08.