PWP No. 4108CD

West Kowloon Drainage Improvement – Inter-reservoirs Transfer Scheme (IRTS)

Project Scope

Construction of a water tunnel of about 2.8 km in length and 3 m in diameter, from Kowloon Byewash Reservoir to Lower Shing Mun Reservoir and the associated intake and outfall structures at both ends of the tunnel 

Major Improvements and Benefits

The IRTS serves dual purposes of improving flood protection level in West Kowloon areas and achieving water conservation by transferring collected surface runoff from the Kowloon group of reservoirs to the Lower Shing Mun Reservoir. It will also strengthen our resilience in flood mitigation for combating climate change.


Black & Veatch Hong Kong Limited


Bouygues Travaux Publics

Contract No.
Project Commencement Date
27 February 2019
Project Completion Date
End 2022
Project estimate

$1,222 million

Controlling Division
Drainage Projects Division
Flood Prevention
Sha Tin
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