TBTA Construction Inspection, Construction Monitoring & Materials Testing

Tectonic has been providing construction phase services to the TBTA at numerous locations throughout the five boroughs including, RFK/Triborough Bridge, Throgs Neck Bridge, Whitestone Bridge, Queens Midtown Tunnel, Henry Hudson Bridge and at the TBTA’s training facility on Randall’s Island.

The scope of services included inspection and testing of soils, concrete, and asphalt.   In addition, visual inspection of welds and torque testing of bolted connections were performed for structural steel erection. Ultrasonic and radiographic testing methods were used to perform shop and field inspection of structural steel. Other services included inspection and testing of asphalt paving for temperature, thickness, as well as inspection of fire proofing, reinforcing steel, masonry, piping system pressure, nuclear density and welding.

For the TBTA’s training facility, Tectonic provided soil vapor monitoring and sampling.

East Side Access

The East Side Access is a $10 billion MTA project which will connect the Long Island Rail Road to Grand Central Terminal in Manhattan. The project involves several major construction initiatives: excavating and constructing a new rail tunnel extending from Sunnyside, Queens into Manhattan’s Grand Central Terminal, and constructing mined caverns under the existing Grand Central Terminal for the new passenger rail station.

Tectonic is providing special inspection and materials testing for all soils, cast-in-place concrete, asphalt, structural steel, precast concrete, shotcrete, earth anchors, blast monitoring, pile driving, grouting and underpinning for three separate contracts  involving tunneling, site work and mined caverns. It is also providing geotechnical engineering services for pile driving, earth anchors, blast monitoring and underpinning.

Tectonic also provided surveying and structural engineering services for the design of an elevated conveyor system to transport excavated material from the new MTA subway tunnel to a transfer station.

Newburgh-Beacon Bridge Deck Replacement Surveys

Tectonic provided surveying and construction inspection services as a subcontractor for the deck replacement on the Newburgh-Beacon Bridge, the most traveled of the New York State Bridge Authority’s bridges. The south bridge deck span was replaced with 1,850 newly fabricated bridge concrete grid panels, giving the deck a new life span of 50 years.

Tectonic provided surveying construction support services including:

  • Taking preliminary measurements on the road surface to determine the location of cut outs for lights and drains, and all expansion joints.
  • Providing layout services including the layout of panel locations for saw cutting and marks for the alignment of new panels.
  • Calculating haunch tables from a combination of existing and proposed bridge elevations to successfully transfer girder locations from underneath the bridge to the top of the bridge.

In addition to these services, Tectonic also provided Quality Assurance and Quality Control on construction inspections and materials testing services for the fabrication of the grid decking.