Port Authority will be replacing four tunnel ventilation fans that comprise the emergency ventilation system of the Mt. Lebanon Transit Tunnel with similarly-sized fans and upgraded drives, controls and other equipment.

Project Timeline:

September 2020

Port Authority's Board approved $5.1 million contract for Wellington Power to complete the work

December 2020

Port Authority issued a notice-to-proceed

January 2021 - March 2021

Submittal approvals, equipment released for production, material procurement to begin

March 2021 - January 2022

Integration software development, testing and installation

April 2021 - October 2021

Fan production and delivery

April 2021 - February 2022

Electrical switchgear fabrication and delivery

January 2022

Demolition work at the tunnels to begin

April 2022

First set of fans installed and operational

July 2022

Second set of fans installed and operational

Fall 2022

Current projected completion of tunnel project


In late November, inspectors for PennDOT discovered corrosion on metal objects inside the tunnel, including scaling on the tracks, that was caused by moisture and condensation. Once alerted to the issue in late December, Port Authority decided to address the issue by operating the existing ventilation fans from 8 a.m. to 8 p.m.

Update (January 26): We have reduced the hours of operation to 10 a.m. to 4 p.m.

Update (March 10): We have reduced the hours of operation to 10 a.m. to 2 p.m.

Update (March 30): Port Authority staff provided an update to Dormont Borough Manager Ben Estell and Noah Pillion-Gardner, Rep. Dan Miller's legislative assistant. Port Authority's engineering consultant investigated options and has provided recommendations for near-term noise abatement. Port Authority is currently exploring options to mitigate the noise at the source.

We will continue to seek solutions to reduce the noise while also keeping the tunnel dry.

Update (July 2): Port Authority has finalized a temporary sound mitigation plan to install acoustical absorption panels on the inside of the fan rooms at both ends of the tunnel and have authorized our contractor to proceed with the work. Material procurement is underway and construction on the temporary noise mitigation work is expected to start in August.

Update (August 25): Supply cain issues have delayed this the sound mitigation plan about one month. The contractor's prep work is expected to begin in September with the installation of the acoustic panels to follow. 

Update (October 14): Supply chain issues are continuing to delay the sound mitigation plan, however the fan replacement project is on-track to begin mobilization in January 2022. Construction trailers are expected to be on-site by November 2021.

Should you have any issues, please contact us using the form below or by calling 412-566-5544

This page will also be updated as new information becomes available.

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