Hong Kong Awards Major Capital Works Contract for Ngau Tam Mei Water Treatment Works Expansion

Hong Kong

Hong Kong has advanced a critical public infrastructure upgrade with the award of a major capital works contract for the Ngau Tam Mei Water Treatment Works (WTW) Extension, a long-term project designed to significantly enhance fresh water supply capacity and system resilience in the Yuen Long District.

The contract forms part of Hong Kong’s ongoing investment in strategic water infrastructure to meet future population growth, urban development, and climate resilience needs.

Project Overview and Scope of Works

The awarded contract covers the extension of the Ngau Tam Mei Fresh Water Primary Service Reservoir, modifications to the Raw Water Tunnel Junction (Chamber G), and extensive associated mainlaying works. The project is registered under Public Works Programme (PWP) No. 9382WF and is currently under implementation.

Key components of the contract include:

• Design and construction of a freshwater primary service reservoir with a storage capacity of 54,000 cubic metres, along with associated civil and structural works

• Design and construction of a 0.6-kilometre-long tunnel with vehicle access, incorporating raw water mains, connection chambers, a ventilation building, tunnel portal, and related facilities

• Design, laying, replacement, and rehabilitation of fresh water trunk mains between Ngau Tam Mei Water Treatment Works and Castle Peak Road - Yuen Long near Pok Oi Interchange, with a total length of approximately 6.7 kilometres

• Additional associated and enabling works to support system integration

Strategic Benefits and System Improvements

Upon completion, the project is expected to deliver substantial improvements to Hong Kong’s water supply network:

• Increase water treatment capacity to 440 million litres per day (MLD)

• Provide civil provisions for future expansion to 640 MLD

• Strengthen raw water conveyance and fresh water distribution systems

• Enhance supply reliability for Yuen Long and surrounding areas

These upgrades are critical to ensuring long-term water security in the New Territories, particularly as demand continues to rise.

Contract and Implementation Details

• Contract No. - 3/WSD/24

• NEC Contract Form - NEC ECC Hong Kong Edition, Option C (Target Cost Contract)

• Works Commencement Date - October 28, 2025

• Estimated Completion Date - April 2031

• Current Status - On-going

• District - Yuen Long

The use of the NEC Engineering and Construction Contract (ECC) Option C reflects a collaborative delivery approach, emphasising cost control, risk sharing, and performance transparency on complex infrastructure works.

Project Management and Consultancy

The consultancy services for the project are being provided by Ove Arup & Partners Hong Kong Ltd, a leading engineering and design firm with extensive experience in large-scale water and civil infrastructure projects.

Overall project oversight is handled by the Consultants Management Division of the Water Supplies Department, which is responsible for ensuring technical compliance, progress monitoring, and quality assurance.

Importance for Hong Kong’s Infrastructure Pipeline

This contract represents a significant component of Hong Kong’s long-term water infrastructure investment programme, highlighting the government’s continued focus on sustainable utilities, climate adaptation, and resilient urban systems.

Large-scale capital works such as the Ngau Tam Mei WTW Extension also generate sustained economic activity across the construction, engineering, and supply chain sectors over multi-year timelines.

Outlook

With construction now underway and completion targeted for 2031, the Ngau Tam Mei Water Treatment Works Extension is set to become a cornerstone of Hong Kong’s future water supply framework. Further capital works contracts related to water treatment, reservoirs, and trunk mains are expected as the city continues to modernise its critical infrastructure network.

#HongKongInfrastructure #CapitalWorksContracts #WaterTreatmentProjects #NgauTamMei #YuenLongDistrict #PublicWorksProgramme #WaterSupplyHongKong #GovernmentContractsHK #NECContracts #InfrastructureDevelopment