AIA Center, NYC, 12 February 2010
A Brief Timeline
- 1880 - Elevated Line constructed on 2nd Avenue
- 1941 - Elevated Line torn down because of health reasons
- 1956 - Third Avenue El Demolished
- 2007 - Another ground breaking
Phase I - 96th Street to 63rd Street.
- Three New Stations at 72nd, 86th, and 96th.
- Two tracks stacked on top of each other.
- Tunnel Boring machine is scheduled to break through the Q line in 2011.
- New Stations are 70-90 feet below grade.
- Two main water feeds approximately 48" diameter are buried on 2nd avenue and supported by the ground; one was replaced with a new 36" diameter main.
- Stability issues with existing buildings that might not be able to handle underground blasting--DoB is verifying these cases and the owner is responsible for stabilizing.
Designs
- Entry Canopy - like South Ferry; access needs to be protected from weather by code
- Design theory--TBM boring at an upwards angle
- 12x12 Granite floor tiles in station with Porcelain wall panels.
- Five elevators at the 72nd Street Entrance on a corner lot probably through the fan plants.
- Fan plants mostly occupied by air shafts and emergency stairs.
Update
- 72nd Street Blasting as just started
- No TBM yet
- 63rd Street contract work to be awarded by the end of 2010
- One Billion still needed towards the end of completion date---should be provided by state government.
- 2016 Phase 1 Completion Date
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