Bouygues Travaux Publics constructed a tunnel of approximately 2.8km long with a 3-metre diameter from the Kowloon Byewash Reservoir to the Lower Shing Mun Reservoir, and the associated intake and outfall structures at both ends of the tunnel. The project was completed in January 2023. The tunnel will be serving dual objectives of improving flood protection level in West Kowloon areas and optimising water conservation, by transferring collected surface runoff from the Kowloon group of reservoirs to the Lower Shing Mun Reservoir. In the long run, this tunnel will strengthen the city’s resilience in flood mitigation to combat climate change.

The worksite is located at the tranquil Kam Shan Country Park. Meticulous project planning had executed to ensure a smooth flow of all construction activities, also to conserve the precious natural environment.