The intent of this project was to improve the overall power reliability and redundancy at the Bronx-Whitestone Bridge and provide electrical upgrades at the Verrazzano-Narrows Bridge. As a subconsultant, SI Engineering, P.C. (SIE) provided construction quality compliance services.
At the Bronx-Whitestone Bridge, work included upgrading equipment, installing a new 5kV feeder between the BWB Service building and the Queens meter room, and replacement of emergency generator, switchgear, and distribution panels. The scope also involved upgrading substations, upgrading and replacing the SCADA network and integrating it to MTA’s DYNAC ATMS platform, and providing two (2) Portable Variable Message Signs (PVMS). The existing mechanical room within the BWB Bronx Service Building was reconfigured. The boiler system was updated to the correct size for heating the service building, and the abandoned toll plaza glycol equipment was removed.
In addition, the scope included structural improvements for flood mitigation at the BWB Service Building and the Bronx Lower Garage. Work at the BWB Bronx Service Building included constructing a parapet-like floodwall around the building, as well as installing deployable flood barrier systems at gates and egress points. Work at the Bronx Lower Garage included constructing a floodwall between the North and South Rooms, as well as installing deployable flood barrier systems at doors and louvers. Additional flood mitigation at these locations included providing watertight covers and check valves as required for the existing sewer and drainage systems and sealing all utility conduits. Other miscellaneous work at the BWB Bronx Service Building included replacing original rooftop HV and HVAC units, rooftop exhaust fans, existing roof system, sanitary sewage ejector pumps, sewage ejector pits as required, and existing oil water separator, as well as masonry repairs and exterior door replacement in and around the building.
At the Verrazzano-Narrows Bridge, work included upgrading the existing substations, replacing the SCADA and power monitoring system PLC hardware, and replacement of the lane control signals in Staten Island and Brooklyn using Daktronics signs and controllers. The SCADA, power monitoring system, and lane control signals were integrated to and hosted on the MTA-TBTA existing DYNAC ATMS.
