Here's a link to the the presentation that MTA Capital Construction and the contractor (S3 Tunnel Constructors) gave at the Community Board 8 Second Avenue Subway Task Force meeting this past Tuesday, 06/17/08:
MTA and S3 Tunnel Constructors
presentation to CB8 (PDF, 7.32 MB) - 06/17/2008
The presentation covered the following topics:
A proposed revisions to track alignment -
72nd Street station reduced from a 3 track and 2 platform station to a 2 track and 1 platform station.
An overview of the maintenance and protection of traffic plan for the work site between 91st and 97th streets.
An overview of the work required to construct the 69th Street and 72nd Street work shafts.
An overview of the construction progress. (March - June, 2008)
An overview of the secant pile wall construction techniques.
An overview of the slurry wall construction techniques.
A review of the crane safety procedures in effect at the