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Bouygues and CRBC win Hong Kong flood tunnel contract

Bouygues and CRBC win Hong Kong flood tunnel contract

Built World

Joint venture to build 3.6km tunnel diverting stormwater to sea by 2030

Today: World Construction Network reports HKEDT contract

Overview

Updated 1 hour ago

Hong Kong's Eastern District floods when heavy rain hits: the streets are dense, the surfaces are impermeable, and the downstream drainage system is overloaded. A joint venture of Bouygues Travaux Publics and China Road and Bridge Corporation will build a 3.6km tunnel to intercept stormwater before it reaches the built-up area and divert it to the sea at Pak Sha Wan.

The €173m contract, signed in August 2026, is part of Hong Kong's 'three-pronged flood prevention approach.' The tunnel, due by 2030, is designed to relieve pressure on the existing downstream network in an area where urban density significantly worsens flood risk.

Why it matters

Hong Kong's Eastern District faces worsening flood risk; this tunnel intercepts stormwater before it reaches the city's most vulnerable streets.

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Key Indicators

HK$2,156 million
Total contract value
Value of the HKEDT works contract awarded to the joint venture.
3.6 km
Tunnel length
Length of the drainage tunnel from Shau Kei Wan and Chai Wan to Pak Sha Wan.
€94 million
Bouygues Construction's share
Bouygues' portion of the €173 million total contract value.

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People Involved

Organizations Involved

Timeline

July 2026 October 2026

4 events Latest: Today
Tap a bar to jump to that date
  1. World Construction Network reports HKEDT contract

    Today Media Report

    World Construction Network publishes its report on the contract award, confirming the €173 million ($193.8 million) value.

  2. Bouygues Construction announces HKEDT contract

    Announcement

    Bouygues publicly announces the contract, valued at €173 million total, with Bouygues' share at €94 million.

  3. Contract signed for Hong Kong East Drainage Tunnel

    Contract Signing

    DSD signs the works contract with CRBC–Bouygues TP–VSL. Works are scheduled to commence in August 2026 and take about 46 months.

  4. DSD awards HKEDT contract to joint venture

    Contract Award

    The Drainage Services Department selects the CRBC–Bouygues TP–VSL joint venture for the Hong Kong East Drainage Tunnel, valued at HK$2,156 million.

Scenarios

1

Hong Kong East Drainage Tunnel opens on schedule in 2030

Likely Resolves by End of 2030

Discussed by: DSD and Bouygues Construction, both of which have stated a 2030 completion target

The joint venture completes the tunnel within the 46-month construction period. The tunnel begins intercepting stormwater from upstream catchments and diverting it to Pak Sha Wan, reducing flood risk in the Eastern District.

2

Delays push tunnel completion past 2030

Possible Resolves by End of 2030

Discussed by: Large infrastructure projects commonly face delays; the contract's 46-month schedule leaves little buffer

Construction faces delays from ground conditions, weather, or other factors. The DSD announces a revised completion date beyond 2030.

3

Project cost overruns reported

Possible Resolves by End of 2028

Discussed by: Large infrastructure projects often exceed initial budgets; the contract value is fixed at HK$2,156 million

The project's cost exceeds the contracted HK$2,156 million. The DSD or the Hong Kong Legislative Council reports additional funding requirements.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

circa 2006

Hong Kong West Drainage Tunnel (circa 2006)

Bouygues Construction built and handed over the Hong Kong West Drainage Tunnel, a stormwater interception tunnel on the western side of Hong Kong Island. The tunnel was part of Hong Kong's flood prevention infrastructure.

Then

The tunnel reduced flood risk in the western districts of Hong Kong Island.

Now

It established the 'stormwater interception in the upstream' approach that the East Drainage Tunnel now follows.

Why this matters now

The same contractor, Bouygues, is now building the East Drainage Tunnel using the same concept, about 20 years later.

2000s

Hong Kong's Integrated Flood Management Strategy (2000s)

Hong Kong adopted the Integrated Flood Management Strategy, which includes a 'three-pronged flood prevention approach.' One prong is 'stormwater interception in the upstream,' which the East Drainage Tunnel applies.

Then

The strategy guided the construction of drainage tunnels and other flood prevention infrastructure across Hong Kong.

Now

It remains the framework for flood prevention, with the East Drainage Tunnel as the latest project.

Why this matters now

The HKEDT is the latest application of this strategy, targeting the Eastern District of Hong Kong Island.

Sources

(6)