update to community board 11 land use committee th st
Post on 04-Apr-2022
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Metro-North
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5
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125th St.
116th St.
106th St.
Second Avenue Subway Phase 2 Update to Community Board 11 Land Use Committee
April 14, 2021
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Soil
Cut-and-Cover Construction Modification of Existing Tunnel Mined Construction
New Tunnels Constructed
using Tunnel Boring Machine
SASP2 Project Overview - Construction Approach
Existing 1970s TunnelEnd of Phase 1 Tunnel
New Storage Tunnels
Constructed using Tunnel
Boring Machine
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SASP2 Project Overview - Stations Spacing and Arrangement
125 Entrance 2 &
Ancillary 2
125 Mezzanine & Platform
125 Entrance 1 & Ancillary 1
116 Mezzanine & Platform
116 Ancillary 1
116 Ancillary 2
116 Entrance 1
106 Ancillary 2
106 Ancillary 1
106 Mezzanine & Platform
106 Entrance 1
106 Entrance 2
Federal Funding
Funding AgreementEngineeringProject Development
• Entered Project
Development Dec. 2016
• NEPA Re-evaluation
SEA (Supplemental
Environmental Assessment)
completed and FONSI (Finding
of No Significant Impact)
issued Nov. 2018.
• Project received Medium-High
rating from FTA in February
2020
• NEPA Re-evaluation (Tech.
Memo) issued April 2020.
Approved: August 2020.
• Submit request for an FFGA
(Full Funding Grant Agreement)
Goal: TBD
• Project team is coordinating with FTA
consultant to help expedite the FFGA
after project enters Engineering
Phase.
• 2020-2024 Capital Plan includes
remainder of funding for SAS Phase 2.
• Received FTA’s Risk & Readiness
Workshop results : August 28, 2019
• Submitted revised Request to Enter
Engineering on September 5, 2019
• Need FTA approval to Enter
Engineering Phase of New Starts
Program.
Goal: TBD
For shallow stations
Ancillary StructuresProposed Acquisition of Property Interests
116th St. Station
Ancillary 2
125th St. Station
Ent. 1 & Anc. 1
125th St. Station
Ent. 2 & Anc. 2 125th St. Tail Track
Ancillary A
Design Progress &
Other Activities
• Advanced Works (Contract 1)
• Design completed.
• Meetings with impacted property owners to start soon.
• Civil/Structural Design/Build (DB) (Contracts 2 & 3)
• Contract documents being updated to incorporate additional cost
containment and based on developer coordination at 125th Street.
• MEP, Systems, and Arch. Fit-out Design/Build (DB) (Contract 4)
• Draft documents completed: Q1 2021
• Anticipated completion of final documents by end of 2021
• Ongoing coordination with Developers at 125th Street Station
• Ongoing Geotechnical boring investigations.
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SASP2 Contract Overview
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• Contract 1• Advanced utility relocation at 106th Street Station
• Contract 2• TBM construction at 125th Street Station
• TBM launch shaft/bell-mouth will be in proximity to Second Avenue and 120th Street.• TBM extraction shaft will be in proximity to 125th Street and Malcolm X Boulevard.
• Station cavern excavation• Contract 3
• Heavy civil construction at 106th Street Station• Station shell and utility restoration
• Heavy civil construction at 116th Street Station• Existing station tunnel rehabilitation• Excavation for station entrance and ancillaries
• Contract 4• Station entrances and ancillaries excavation at 106th and 125th Street Station• Station, entrances and ancillaries finishes at 106th, 116th and 125th Street Station• Final street restoration
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