NEW YORK | US
CONTRACTS START ON SECOND AVENUE SUBWAY EXTENSION
First contract awards have been made for New York subway extension Phase 2 – on the about-to-be-enlarged Second Avenue Subway. New York’s Metropolitan Transportation Authority (MTA) has awarded the first construction contract for the extension of the
Second Avenue Subway in Harlem. CAC Industries won the US$182m contract to relocate underground utilities from 105 Street to 110 Street on Second Avenue at the site of the future 106 Street Station, to allow the subsequent cut-and-cover construction of the station. The contract also includes temporary streetscape modifications that will be required during construction. It is the first of four construction contracts for the new line, which will extend the Q train approximately 1.5 miles from 96 Street to 125 Street and provide three new accessible stations for the East Harlem community. New York City has some of the most complex underground utilities networks in the world – much of which is unmapped – which can add delays and costs once projects are underway. Announcing the contact award, New York’s Governor Kathy Hochul said advancing utility relocation ahead of station and tunnel
construction was a major lesson learned from Phase 1 of Second Avenue Subway. MTA’s Construction and Development president, Jamie Torres-Springer, echoed that valuable lessons learned from past projects
were being implemented into Phase 2 of the Second Avenue Subway. “This contract reflects our new approach by proactively relocating utilities upfront. Improving this process will help deliver this project more efficiently and provide residents of East Harlem with increased transportation options better, faster, and cheaper than before,” he said. Revenue from congestion pricing will support US$15bn in funding for critical projects in the MTA’s current capital programme, which includes Second Avenue Subway Phase 2. Additional cost containment initiatives in Phase 2 include reuse of a tunnel segment that was built in the 1970s from 110 Street to 120 Street along Second Avenue, early real estate acquisition, adoption of ‘best value’ contract structures (such as A+B contracts), reduction in back-of-house and ancillary space, and close co-ordination of contracts. Phase 1 of the project extended the Q line from 63 Street to 96 Street and was New York City’s largest expansion of the subway
system in 50 years. Since opening in January 2017, the Second Avenue Subway has carried more than 130 million passengers in total, including over 200,000 passengers on a typical pre-pandemic day.
TUNNELING COMPLETED ON LONG ISLAND PROJECT Working on a Design-Build contract, Western Bays
Constructors, a joint venture of John P Picone and Northeast Remsco Construction, began works in 2021. Fourteen shafts were built and the two micro tunnel boring machines (TBMs) were launched in 2022. Twelve tunneling drives were completed to lay the 6ft-diameter tunnel at depths of 19ft-26ft. Microtunneling was chosen for the project to minimize
Above: One of shafts on the Bay Park Conveyance Project
Tunneling works have been completed on the Bay Park Conveyance Project in New York state. The project to improve Western Bays, on Long Island, will
convey treated wastewater for eventual offshore disposal. It has involved nearly 11 miles of microtunneling and around one mile of sliplining of an abandoned 100-year-old aqueduct pipe.
disturbance to surrounding communities, reduce cost and accelerate construction. The project investment is being undertaken to reduce nitrogen pollution in Long Island’s Western Bays. It will redirect treated water through a pollution control plant to an Atlantic Ocean outfall. “The Bay Park Conveyance Project is one of the most
innovative infrastructure projects in the nation and an example of our State’s commitment to securing a healthier and more sustainable future for New Yorkers,” said New York’s Governor Kathy Hochul. “With the conclusion of this phase of work, we are making important progress to ensure Long Island has access to clean water and create healthy and resilient ecosystems.”
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