Next Second Ave contract bid result Apr 2011
Paula Wallis, TunnelTalk
- The Skanska/Traylor JV is the apparent low bidder for the 86th Street Station cavern on the Second Avenue Subway Line in New York City. The JV's bid of early $302 million beat out four other joint ventures vying for the lucrative contract (Table 1). The low bid is roughly $800,000 below the Engineer's estimate of about $400 million.
Fig 1. Plan of Second Avenue Subway's 86th Street station
- Excavation of the cavern will proceed but the legal issues could impact the timeline when the demolition work and entrance scoping begins.
- Meanwhile the Robbins hard rock TBM working on the project finished the first of its two running tunnel drives from 92nd Street to 63rd Street on February 4th. "The best day on the first run was 114ft (35m), with an average of about 41ft/day (12.5m/day)," said Tom Peyton of Parsons Brinkerhoff and Project Director for Construction. "We decided, during the drive, to extend the tunnel by 2,200ft (670.5m) and on the extension average advance was about 49ft a day (15m/day)."
- Peyton said the Robbins machine completed the roughly 7,200ft (2,195m) first drive with no major issues. The TBM is about 30 years old and was first used to excavate the MTA's 63rd Street Tunnel in the late 1970s. It has been used on at least four other projects, most recently on the Fall River CSO Project in Massachusetts.
- The TBM was disassembled and the trailing gear pulled back to 92nd Street launch shaft. It was re-launched on March 21st and is about 223ft (68m) into its parallel 7,800ft (2,377m) second drive, which includes a tight westerly curve into the existing 63rd Street Station.
Second Avenue Subway Phase 1
- The first 200ft of the drive was in frozen ground. Ground freezing, installed by specialist subcontractor Moretrench, was needed for safe launch of the TBM through weak water-bearing ground.
- "The ground is as expected," said Peyton. "There are one or two additional faults and the typical Manhattan rock is very blocky, but no big surprises. Everyone is fairly optimistic that the second drive will be finished by the end of the year. In addition, the cast-in-place final lining is going to start in the west tunnel later this month."
- Elsewhere on the project, Schiavone/Shea/Kiewit JV (SSK) was awarded the $447.2 million 72nd Street station contract in October 2010, and is into construction of the contract's 69th and 72nd Streets shafts. Reconstruction of the 63rd Street/Lexington Avenue station was awarded to Jaudlau Contracting on January 13th 2011 and is mobilizing to the site. MTA expects to award the 86th Street station contract later this month or early next month to Skanska/Traylor JV, barring any issues, and for construction to start this summer.
- The Skanska/Traylor JV has plenty of experience navigating the tough New York construction contracting conditions. Skanska in joint venture with Schiavone and Shea is working the $337 million Second Avenue subway Phase 1 tunneling contract as well as the $447.2 million contract on New York's $2.1 billion No 7 Line Subway extension to 34th Street. Traylor Brothers, in joint venture with Granite and Frontier-Kemper, is set to begin excavation of the Queens soft ground tunnels on New York's East Side Access Project. When complete in December 2016, Phase I of the Second Avenue Subway will serve 213,000 daily riders and will reduce travel times by up to 10 minutes or more for those traveling from the East Side to West Midtown.
- Blue Plains project team selected in DC - TunnelTalk, Mar 2011
New York breakthrough in Times Square - TunnelTalk, June 2010
Slurry TBMs ready to tackle New York ground - TunnelTalk, March 2011
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