NEWS |
Hudson Yards concrete casing at halfway milestone
Ayesa wins another Santiago metro contract CHILE - Ayesa Engineering has won a contract to provide a range of project management support services to the development of Line 9 of Santiago metro. Line 9 will be entirely underground,
along with 19 new stations, depots and maintenance facilities. The metro line will run 27km through
the Chilean capital’s districts of Recoleta, Santiago, San Miguel, San Joaquín, La Granja, San Ramón, La Pintana, and Puente Alto.
Line 9 involves a US$2.73bn budget and
includes a transfer hub at Cal y Canto station, located at the edge of the historic city centre. Services to be provided under Ayesa’s
Above: HYCC-3 provides the final link that will enable the new Hudson Tunnel to connect to New York Penn Station
US - The Hudson Yards Concrete Casing – Section 3 (HYCC-3) Project – a key element of the Hudson Tunnel Project (HTP) – is more than 50% complete. The Gateway Development
Commission (GDC) said HYCC-3 is on track to be finished in 2026. The Gateway Program includes
building the new 3.9km-long, two- tube Gateway Tunnel under the Hudson River, between Newark, New Jersey, and New York City’s Penn Station, and also refurbishing Amtrak’s existing North River rail tunnel. HYCC-3 Project provides the final
link that will enable the new tunnel to connect to Penn Station. The other two sections of the concrete casing were completed in 2018. The third section is 152.5m long, 18.3m wide, and 18.3m deep. The structure will consist of
heavily reinforced concrete walls ranging from 1m-3m in thickness and waterproof membrane covering will be around the perimeter. GDC’s CEO Tom Prendergast
emphasised the scale of the Hudson Tunnel project. “We talk about the HTP as a
single megaproject, but when you think about the scope and complexity of each construction package, it is more like 10 megaprojects rolled into one.
6 | September 2025
Reaching the halfway point on the HYCC-3 Project on scope, schedule, and budget is an amazing accomplishment,” he said. Five of the 10 major construction
projects on massive HTP are currently in progress. GDC said that it anticipates
awarding the contracts for two more large projects on HTP in 2026. The active projects include:
● The Tonnelle Ave Bridge and Utility Relocation Project, which involves building a new road bridge to support the highway and create access into the TBM launch site. This project is more than 75% finished
● The Hudson River Ground Stabilisation (HRGS) Project, which involves mixing concrete into a block of riverbed silt, on the Manhattan side, for TBMs to pass through.
● The Palisades Tunnel Project is the first tunnel boring project on the HTP. Early work, including installing monitoring equipment, geotechnical borings, and clearing the area where the TBMs will launch is in progress.
● The Manhattan Tunnel Project will construct a section of tunnel from HYCC and a 12th Avenue shaft for TBM extraction. The contract is with Frontier-Kemper– Tutor Perini JV.
contract to Line 9 include: engineering management advice; counterpart engineering; environmental and community relations consultancy; works co-ordination; service change management; expropriation and easement management; and, project planning and control. Ayesa has worked on Santiago metro
through a number of engagements. Previously, the consultancy provided technical inspection services for the extension of Line 3. It is currently supervising the civil engineering works on different parts of Line 7.
ECRL tunnelling finishes with Genting breakthrough MALAYSIA - The East Coast Rail Link (ECRL) project has celebrated completion of tunnelling on the 16.4km-long Genting Tunnel, also finishing all underground works along the 665km-long route. The Genting Tunnel is the longest tunnel
on the new rail link between Kota Bharu, Kelantan and Port Klang, Selangor, and most technically challenging of the 41 tunnels on ECRL. It is also the longest rail tunnel in Malaysia. Located in the Titiwangsa mountains,
Genting Tunnel passes through fault lines and pockets of chlorite rock. Overburden is up to 750m. Excavation has used both TBM boring and Drill and Blast Method. Project client Malaysia Rail Link Sdn
Bhd (MRL) said Genting Tunnel is a key component of the ‘land bridge’ to connect Kuantan Port and Port Klang, on east and west coasts respectively of Peninsular Malaysia. ECRL is to finish late 2026 for passenger
services to start early 2027, between Kota Bharu and Gombak.
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