Catalist-listed Koh Brothers Eco Engineering's subsidiary has been awarded a contract valued at $999 million for the construction of intra-terminal tunnels at Terminal 5 (T5) with Penta-Ocean Construction, by Changi Airport Group (CAG).

The subsidiary, Koh Brothers Building & Civil Engineering Contractor, will build these intra-terminal tunnels that serve as underground connections within T5, for the transfer of passengers and baggage across the terminal’s concourses, and for the routing of common utilities.

The tunnel system comprises a series of sub-tunnels that will house key infrastructure to support efficient airport operations.

T5 is part of the larger Changi East development that includes Changi Airport’s third runway, as well as cargo complexes and other supporting aviation and ground transport infrastructure. The project is expected to be completed in the mid-2030s.

“We are pleased to partner two highly reputable construction companies on the project – Penta-Ocean, recognised for its extensive expertise and technical proficiency in undertaking large-scale projects such as land reclamation within Singapore and internationally; and Koh Brothers, a key player in shaping Singapore’s infrastructure development with a strong track record in delivering complex, large-scale projects locally,” says Ong Chee Chiau, managing director for Changi East.

Shares in Koh Brothers closed 0.2 cents lower or 1.099% down at 18 cents on June 10.