update to community board 11 land use committee th st

Metro-North

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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

Project Overview

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SASP2 Project Overview - Second Avenue Subway Phase 2

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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 Ancillary 1

116 Ancillary 2

116 Entrance 1

106 Ancillary 2

106 Ancillary 1


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

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Contract 1 (Utility Relocation) – Overview

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CONTRACT C-26201

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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Questions or Comments

Contact Information:

Joe O’DonnellMTA Construction & DevelopmentJoseph.O'[email protected]

Alex Zamudio East Harlem Community Collaborators [email protected]

update to community board 11 land use committee th st

Documents