1. Home
  2. MTA projects
  3. Installing mechanical closure devices at 138 St-Grand Concourse

Installing mechanical closure devices at 138 St-Grand Concourse

New York City Transit (NYCT) plans to install MCDs in the ventilator structure located south of 138 St-Grand Concourse, in La Finca del Sur community garden. These improvements are needed to ensure flood protection during major storm events, such as was encountered during Superstorm Sandy.
Updated Sep 19, 2023


  • Location
  • Type
  • Status

Area Map


Contract awarded
  • March 2021
Substantial closeout
  • September 2022
Final completion
  • June 2023


We are completing the installation and replacement of mechanical closure devices (MCDs) south of the 138 St-Grand Concourse   station, at La Finca del Sur Community Garden, to ensure flood protection during major storms.

MCDs function as a watertight door, sitting beneath a grate in a vent shaft, to hold back water during flood events. The existing vent structure was deteriorated and needed to be replaced.

These MCDs will have the ability to seal the ventilator grates so that the 138 St-Grand Concourse   station is protected from future flood events. The devices, underneath the vent, are manually activated by subway personnel in the event of an anticipated flood condition.

Major work was finished in 2022. Final completion is scheduled for June 2023.

Remaining work

  • Restoration of covered vent space below Metro-North property
  • Restoration of park surface (grading and seeding)
  • New access gate
A Metro-North train rolls by on the tracks overlooking La Finca del Sur Community Garden in the Bronx

Public notice

This page is part of the public notification of MTA New York City Transit’s plan to install mechanical closure devices (MCDs) in the ventilator structure of the 138th St-Grand Concourse station, to prevent localized water infiltration in the station in accordance with 23CFR 774.17 governing the Section 4(f) de minimis impact determination.