Construction of Trunk Water Main at West 48th Street from 10th Avenue to Broadway, Manhattan

Keeping Up with Future City Growth


New York, NY


New York City Department of Design & Construction

Project Cost

$100 million


New York City’s water distribution infrastructure is aging and in need of repair and upgrades. To help accomplish this critical work, the City constructed a new water tunnel, City Tunnel No. 3. The tunnel runs more than 400 ft below street level, with the water brought to the surface through a series of vertical shafts. The W48th street project (MED 599) is one of many similar projects in Manhattan that have connected new distribution chambers and piping to the City Tunnel No. 3 shafts. Upon completion of these projects, the city will be able to continue to activate sections of Tunnel No. 3, and ultimately begin rehabilitating City Tunnels No.’s 1 and 2.

About the Project

The W48th street project included the installation of new trunk and distribution water mains for connection to one particular shaft of Tunnel No.3, Shaft 25B, located at 10th Avenue between W48th and W49th streets. Project specifics included the installation of 48″, 36″ and 30″ trunk water mains and associated valves and chambers; installation of 20” and 12” distribution mains; private utility upgrades, including new gas and electric lines; rehabilitation and/ or replacement of combined sewers; reconstruction of curbs, roadways and sidewalks; and extensive MPT, including work on 8th, 9th, and 10th Avenues in Manhattan.

Project Challenges & Solutions


LiRo’s efforts served to expedite work, to circumvent potential delays and difficulties and provided the community with as little disruptions to their environment as possible.


Resident/ Construction Engineering & Inspection


Water/ Wastewater