Amtrak Gateway Tunnel, Hudson Yards Development

Tectonic provided construction inspection, materials testing and construction phase geotechnical engineering services for the Amtrak Tunnel Casing at the Hudson Yards Development project on the west side of Manhattan. The Amtrak Tunnel Casing which, will be located within the LIRR Storage Yard, is being constructed in advance of the main gateway project to ensure access to this area prior to construction of the main platform that will cover over the West Side Storage Yard to accommodate the build out of Hudson Yards.

Tectonic provided geotechnical engineering and special inspection services associated with the rock anchor tied back secant pile walls and the cut and cover box tunnel for the Amtrak Casing as well as for the future buildings. Special inspections included Concrete Testing for Foundation & Superstructure, Dynamic & Static MOE Testing, Shrinkage Testing, Mass Concrete Monitoring, Filigree inspections, Structural Steel Welding & Bolting, SOE Inspections, Post Tensioning, Reinforced Masonry, Fireproofing and Firestopping.

Responsibilities included resident engineering for technical oversight of geotechnical construction work, contract administration, technical inspections, QA/QC on-site field testing of materials, field measurement and collection of data for contractor payments, coordination of contractors scheduling, attendance at on-site progress meetings, coordinating with outside involved agencies, assist with preparation of RFI’s, preparation of daily inspection reports and monthly progress reports, record keeping and as-built plan preparation.

At full build-out, the mixed use development will include 16 high rise buildings containing more than 12.7 million SF to accommodate residential, commercial and retail development. A platform will be constructed over MTA Long Island Railroad (LIRR) West Side Storage Yard to accommodate the buildings and infrastructure.

Reconstruction of Stewart International Airport & JFK Airport Runways

As part of an ongoing airport terminal expansion program through the FAA, the PANYNJ acquired funding to accommodate the increase in air travel as well as cargo services. The redevelopments and expansions range from a 50,000-square-foot air cargo building to several million dollars for short-term projects, including taxiway improvements, parking lot expansion, 200 additional new seats in the terminal, and a new access road.

Tectonic provided construction inspection services which included milling, removal and replacement of asphalt concrete pavements, site work involving excavation, grading and subgrade preparation, infrastructure work including sub-drainage systems, sanitary/storm sewers, and utility lines. Tectonic also provided concrete testing and sampling services and soils compaction testing with a Nuclear-Density Gauge for controlled backfill and subbase preparations.

Additionally, Tectonic provided Quality Control Technicians to ensure that the placement, joint construction and compaction of the asphaltic concrete pavements for the Runways and taxiways was done in accordance with the specifications.

Walkway over the Hudson Waterfront Elevator

Construction of a new $2.3 Million, 20-story tower structure with glass elevator supported by caisson foundations, and funded by the Federal Highway Administration through the NYSDOT. This steel tower with glass elevator provides access from a riverfront park along the Hudson River waterfront and rises 220 feet to the deck of the longest elevated pedestrian bridge in the world. The area at the base of the elevator was enhanced with a lighted asphalt pedestrian walk.

Tectonic performed construction inspection and materials testing services for soils, pile installation, cast-in-place concrete, structural steel framing, and mechanical inspections for the elevator. Geotechnical services included boring inspections, geotechnical review for the foundations of the elevator, and construction phase geotechnical inspections of the drilled shaft. Tectonic also provided resident engineering services.

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.

NYC Transit No. 7 Line Extension

Tectonic is providing geotechnical and special inspection/materials testing services for the $1.1 Billion construction of the No. 7 Line running tunnels, Site A Vent Building, Site J Vent Building and furnishing and installing systems and finishes for the new expansion. The project involves the construction of 7,000FT of two 22FT diameter running tunnels, and the construction of two new subway stations at Tenth Avenue/41st Street and 34th Street/11th Avenue near the Hudson Yard on the West Side of Manhattan. Construction of the new running tunnels and station involves extensive rock excavation using conventional drill and blast methods and tunnel boring machines (TBM’s) to carve out the caverns to accommodate the new station. Ancillary work involves the installation of drilled shafts, rock anchors, rock bolts and shotcrete to support the excavated faces. Other aspects of the work includes complete above and below grade construction of the Sites A & J Vent Buildings and installation of all the systems and finishes including trackwork and signalization, escalators, elevators, etc.

As representative for MTA, Tectonic is a sub consultant to the joint venture contractor, Skanska Railworks JV, responsible for performing geotechnical special inspections and third party materials laboratory testing. Responsibilities include blast and vibration monitoring, review of vibration mitigation plans, geologic mapping of excavated faces, inspection of rock reinforcement including rock bolts and passive dowels, inspection of subgrades, witnessing and monitoring of rock anchor testing including water pressure testing of anchor boreholes, inspection of rock drains, inspection of final shotcrete placement, underpinning, boring inspection, and logging of exploratory probe holes.

Tectonic is also providing special inspections, laboratory testing and QA/QC services during the excavation for the tunnels and caverns, dewatering, tunnel lining and construction of structures involving field and plant inspection and testing of concrete, shotcrete, structural steel, masonry, grouting, fireproofing, mechanical/ventilation systems and electrical systems, etc. Compaction testing and back fill placement included gradation analysis, Atterberg limits, density, and moisture content. Tectonic is also responsible for development of shotcrete qualifications testing program including preparation of design mixes and performance of laboratory and field trial tests. Other duties include preparation of daily, weekly and monthly inspection reports, attendance at progress meetings and liaison with onsite MTA representatives.

Second Avenue Subway

Tectonic is providing geotechnical engineering, construction inspection and materials testing services for the $4.4 billion construction of the Second Ave, Subway running tunnels and the 86th St. Station cavern mining and heavy civil. The work involves excavation of two station caverns, each approximately 900LF long by about 70FT high and almost 100FT wide and excavation of two 22ft. diameter running tunnels between 92nd St. and 63rd St. (approximately 7200LF each). Construction of the new running tunnels and station involves extensive rock excavation using conventional drill and blast methods and tunnel boring machines (TBM’s) to carve out the caverns to accommodate the new station. Ancillary work involves the installation of drilled shafts, rock anchors, rock bolts and shotcrete to support the excavated faces.

As agent to MTA, Tectonic is a sub consultant to the joint venture contractor, Skanska Traylor JV, responsible for performing geotechnical special inspections and third party materials laboratory testing. Compaction testing and back fill placement included gradation analysis, Atterberg limits, density, and moisture content. Responsibilities include blast and vibration monitoring, review of vibration mitigation plans, geologic mapping of excavated faces, inspection of rock reinforcement including rock bolts and passive dowels, inspection of subgrades, witnessing and monitoring of rock anchor testing including water pressure testing of anchor boreholes, inspection of rock drains, inspection of final shotcrete placement, underpinning, boring inspection, and logging of exploratory probe holes ahead of TBM. Tectonic is also providing special inspections, laboratory testing and QA/QC services during the excavation for the tunnels and caverns, dewatering, tunnel lining and construction of structures involving field and plant inspection and testing of concrete, shotcrete, structural steel, masonry, grouting, fireproofing, mechanical/ventilation systems and electrical systems, etc. Tectonic is also responsible for development of shotcrete qualifications testing program including preparation of design mixes and performance of laboratory and field trial tests. Other duties include preparation of daily, weekly and monthly inspection reports, attendance at progress meetings and liaison with onsite MTA representatives.

Bridge Replacement & Rehabilitations

Tectonic’s Rocky Hill office has been providing final design, engineering and construction inspection services for a wide variety of bridge replacement and rehabilitation projects throughout Connecticut, including:

  • Old Newtown Road over Still River, Danbury, CT
  • Route 2 over Shetucket River, Norwich, CT
  • Route 216 over Spaulding Brook, North Stonington, CT
  • Route 133 over Houstatonic River, Brookfield, CT
  • Old Main Street over Goff Brook, Rocky Hill, CT
  • South Maple Street Bridge, Enfield, CT
  • Crosby Street Bridge over Padanaram Brook, Danbury, CT
  • North Main Street over Trout Brook, West Hartford, CT

GOSR Term Agreement for Program Management and Advisory Services

In October 2012, the largest storm surge in New York’s recorded history swept ashore. Hurricane Sandy’s effect was devastating, causing widespread damage to core infrastructure. To assist with the relief of affected residents, Tectonic holds a three year period to provide expert policy and regulatory consulting, information, project management support, research and financial analysis, data and information systems support and other services across an expansive range of CDBG-DR funded projects and programs.

Cold-Formed Steel Buildings

Tectonic performed structural design of cold-formed steel framing for several multi-story residential buildings. The construction of the residential buildings throughout NYC ranged from 5-7 stories and from 7,000 sq. ft. to 70,000 sq. ft. Cold-formed was utilized for a faster installation schedule, therefore the cold-formed wall panels were built in shop and brought to the site assembled. This included design of the superstructures which consisted of cold-formed steel joist floor and roof systems, supported by cold-formed steel framed bearing walls and shear walls above the foundation or ground floor. Inspections of the cold-formed walls and joists were performed to meet DOB and contract documents.

MTA East Side Access Conveyor System

East Side Access, a $7 billion MTA project underway in NYC, will connect the Long Island Rail Road’s (LIRR) Main and Port Washington lines in Queens to a new LIRR terminal beneath Grand Central Terminal in Manhattan. The new connection will increase the LIRR’s capacity into Manhattan, shorten travel time for commuters, and provide a new commuter rail station in Sunnyside, Queens and under the Grand Central Terminal.  To support the new connection, Tectonic provided structural engineering and special inspection services on a multi-year contract for various phases including the Manhattan Tunnel, Harold Interlocking Structures and Grand Central Station. Construction design support services included structural and geotechnical design of temporary facilities including preparation of footing design plans for conveyor system to disposal of tunnel muck that included an enclosed steel truss spanning 120 ft. across Northern Boulevard.