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The region’s most ambitious causeway projects

8 February 2023

 

The submission of feedback questionnaires and meetings with contractors for the planned second causeway connecting Saudi Arabia and Bahrain is the latest sign of potential progress on one of the region’s largest infrastructure projects.

Causeways have a chequered history in the region. The first causeway connecting Saudi Arabia and Bahrain was completed during the 1980s, and since then, it has had a transformative impact on the Bahraini economy. 

The project’s success has inspired other causeways. But while these schemes remain ambitions for many in the region, construction progress has been limited. The hope is that a successful second causeway linking Saudi Arabia and Bahrain will foster the delivery of other longstanding causeway plans.

These are the most ambitious causeway schemes that the region has planned:

 Second Saudi Arabia-Bahrain causeway

The second causeway between Saudi Arabia and Bahrain is the most likely to proceed. Planned by the King Fahd Causeway Authority, the $3.5bn project, which has been called the King Hamad Causeway project, is moving towards construction.

In 2021, senior government officials in Bahrain told MEED that the project was progressing towards tendering as financial studies had been completed.

The project was included in Bahrain’s $30bn Strategic Projects Plan that was announced later in 2021. As well as the causeway, the plan includes building new urban areas on five reclaimed islands to increase the country’s total land area by 60 per cent. It also comprises plans for a new airport.

The second causeway involves building a 25-kilometre road and rail crossing linking Saudi Arabia and Bahrain. It will follow the same alignment as the existing King Fahd Causeway.

It has been earmarked for delivery on a public-private partnership (PPP) basis. The King Fahd Causeway Authority appointed a consortium to provide transaction advisory services in late 2019.

The $8.9m consultancy agreement was signed with a consortium of Netherlands-headquartered KPMG, US-based Aecom and UK-based CMS. The team was tasked with working on developing the financing model, the required engineering specifications and design, as well as helping with the assessment and selection of the project’s developers.

Canada-based SNC Lavalin and UK-based consultancy firm PwC conducted the project due diligence study in 2017.

The existing King Fahd Causeway is operating at capacity. About 11.5 million cars cross the causeway every year, and the growth has been 6 per cent per annum over the past 10 years.

 Qatar-Bahrain causeway

There have also been suggestions that the proposed causeway bridging Bahrain and Qatar may be revived. In March 2022, Manama called for work to restart on the causeway joining the two countries.

“We in the Kingdom of Bahrain renew the call for the start of bilateral talks between the two sides in accordance with the mechanisms agreed upon in the Al-Ula statement,” said Bahrain’s undersecretary for land transportation and post in an official statement published by the official Bahrain News Agency.

The estimated $4bn Qatar-Bahrain causeway project was put on hold and the contracting consortium demobilised in 2010.

A joint venture of state-owned developer Qatari Diar Real Estate Investment Company and French contractor Vinci Construction Grand Projets led the consortium. The other consortium members were Germany’s Hochtief, Athens-based Consolidated Contractors Company (CCC), Dredging International from Belgium and the local Middle East Dredging Company (Medco).

The planned 40km bridge includes a four-lane motor crossing scheduled for completion in 2013 and two railway lines forming part of the GCC rail network.

The project also comprises 22km of bridges and viaducts, 18km of embankments and two 400-metre cable-stayed bridges. The causeway connects Ras Ashairij on the west coast of Qatar to Askar on the east coast of Bahrain.

The project was also known as the Friendship Bridge and was to be jointly funded by the Qatari and Bahraini governments, which intended to recover some of the construction costs by implementing a toll system on the bridge.

The crossing would cut the journey time between the two countries, which currently involves a detour through Saudi Arabia, from five hours to just 30 minutes.

 Saudi Arabia-Egypt causeway

The prospects for the causeway connecting the $500bn Neom project in Saudi Arabia and Egypt’s Sinai Peninsula across the Straits of Tiran improved last year after US President Joe Biden’s visit to Saudi Arabia.

After the visit, a joint communique issued by Washington and Riyadh referred to the development of Tiran Island.

“President Biden welcomed the arrangements by Saudi Arabia to remove the Multinational Force & Observers (MFO) from the Island of Tiran, including the removal of US troops there as part of the MFO mission, while preserving and continuing all existing commitments and procedures in the area,” it said. 

“This area of the Red Sea will now be developed for tourism and economic purposes, contributing to a more secure, peaceful and prosperous region.” 

The US-Egyptian-Israeli-backed MFO was founded in 1981 to oversee the terms of the 1978 Camp David Accords, which included the full Israeli withdrawal from the Sinai Peninsula.

In 2016, Egypt and Saudi Arabia agreed during a state visit to Cairo by King Salman bin Abdulaziz al-Saud to develop a causeway linking the two countries across the Red Sea. 

The agreement was made as part of a broader deal that would also involve Egypt ceding the sovereignty of the two Tiran islands to Saudi Arabia.

While details of the proposed crossing were never revealed at the time, it was understood to be a revival of a $4bn project announced in 2011. That scheme involved building a 32km crossing stretching over the Straits of Tiran from Ras Humaid in Tabuk, in the northern region of Saudi Arabia, to Ras Nasrani, close to the Egyptian resort of Sharm el-Sheikh.

Plans to link Saudi Arabia and Egypt are far from new. The development of a causeway was first mooted as far back as 1988. However, the idea has received additional focus in recent years following the launch of the Neom development in northwestern Saudi Arabia, which includes Ras Humaid. Part of the Neom scheme, the 170km-long linear city known as The Line, will extend from the promontory inland to the city of Tabuk.

UK-based Arup was reported to have been selected in 2019 for the next stage of the feasibility study for the causeway. 

Saudi Arabia was understood to be considering using a public-private partnership (PPP) model for the scheme, similar to other transport projects planned in and around the kingdom.

 Yemen-Djibouti causeway

A 28.5km causeway was planned to connect Yemen and Djibouti before the scheme was put on hold in 2010 until the governments of both countries signed the framework agreement for the project. The civil war in Yemen means it is unlikely the scheme will make any progress soon.

The estimated $20bn first phase involved building the link between the Yemeni mainland to the island of Perim in the Red Sea. Phase two would have then connected Perim with Djibouti.

The wider project also involves building two cities at each end of the link. The total investment required to construct the cities and the bridge is $200bn.

Dubai-based Al-Noor Holding Investment Company was developing the project.

In 2009, the company said it expected to award a build-operate-transfer contract for the first phase of the bridge and that three companies had expressed interest in funding and building the road and rail link. Denmark’s Cowi prepared the preliminary design for the crossing.

 UAE-Qatar causeway

In 2005, Abu Dhabi and Doha were reported to have been setting up a joint company to oversee the implementation of the proposed UAE/Qatar causeway.

The 40km causeway was expected to start near Sila in Abu Dhabi emirate and extend to the south of Doha.

The estimated $13bn crossing would have significantly cut journey times. At present, traffic between Qatar and the UAE has to pass through 125km of Saudi Arabian territory.

The scheme stalled shortly afterwards. Problems included difficulties with the route, which ran through Saudi Arabian territorial waters.

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Colin Foreman

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    Qatar is implementing a smaller version of the same concept. Ashghal has recently awarded a $104m contract for a trunk sewer running from Sheehaniya to the Doha North sewage treatment works. The tunnel will extend for about 39km, with diameters ranging from 600mm to 1,800mm, serving a catchment area covering 27,320 hectares of villages, farms, military facilities and a new residential development.

    These projects may lack the glamour of a metro line, but they demonstrate the same underlying principle. Once a city reaches a certain level of density, even routine utility infrastructure defaults to tunnelling rather than trenching.

    Roads and enabling works

    The third strand of the tunnelling boom covers the roads and enabling works that gigaprojects and dense cities increasingly require. Abu Dhabi’s Mid Island Parkway project combines bridges, a causeway and tunnels, including a cut-and-cover section on Bilrimaid Island, linking the emirate’s eastern islands.

    Another scheme currently under tender will connect Hudayriat Island to the mainland through two underwater tunnels feeding a 4.8km highway.

    In Al-Ain, Al-Fahjan Construction is boring a 120-metre tunnel through the Naqfa Mountains as part of a AED291m ($80m) dual carriageway, demonstrating that tunnelling is becoming viable outside the three largest urban centres wherever terrain, rather than density, presents the principal obstacle.

    Sharjah and Riyadh illustrate how the same approach is being adopted across different scales of urban development. Sharjah’s Al-Taawun Tunnel, the centrepiece of a AED750m ($204m) road programme linking Al-Nahda Bridge towards Dubai, and Riyadh’s Thumamah Road package, where Turkish contractor Yuksel Holding’s local subsidiary is constructing three tunnels and three bridges designed to carry 200,000 vehicles a day by 2028, reflect the same need to maximise surface capacity while avoiding disruption above ground.

    Dubai continues applying the same solution to smaller transport bottlenecks. The RTA’s contract to upgrade Umm Suqeim Street, Al-Wasl Road and Al-Safa Street includes bridges and tunnels totalling about 11km in what would once have been a straightforward at-grade junction improvement. The twin tunnels due to open on the Sheikh Rashid Corridor this August serve the same purpose: maintaining traffic flow between Oud Metha and Al-Wasl Club Street without adding a single lane of surface road.

    The contractors that have absorbed the lessons from Riyadh Metro’s earlier phases and Dubai’s Blue Line, rather than simply bidding aggressively to secure a share of a buoyant market, are likely to emerge strongest

    Contractors and technology

    The contractors delivering these projects increasingly move between them. The same firms bid for metro tunnels, sewerage tunnels and road tunnels, while the TBM fleets, grouting crews and tunnelling expertise developed on one project are redeployed on the next, sometimes in a different country.

    Turkish, Chinese, Korean and European civil engineering contractors that built Riyadh Metro’s earlier lines are now bidding for Metro Line 7 and for packages on Dubai’s Strategic Sewerage Tunnels project. Local firms such as Al-Marwan Contracting in Sharjah and Al-Fahjan Construction in Al-Ain also demonstrate that tunnelling is no longer the preserve of a handful of European and Japanese specialists, but a capability that regional contractors can increasingly offer.

    Clients have noticed. Procurement is likely to favour contractors and joint ventures that can demonstrate tunnelling experience across multiple countries, because ground conditions, TBM logistics and underground station construction involve too much risk to entrust to first-time operators.

    What happens next

    The main constraint on the region’s tunnelling boom is unlikely to be client appetite or financing. Instead, it will be the availability of TBMs and specialist subcontractors. Herrenknecht and its competitors cannot manufacture bespoke machines overnight, and every metro, sewerage and highway tunnel competing for the same large-diameter TBMs will continue to push lead times and day rates higher throughout the remainder of the decade.

    The pressure extends well beyond the machines themselves. Waterproofing, grouting, segment casting and ground-freezing specialists remain a relatively small global pool, and a region delivering metro, sewerage and highway tunnels simultaneously across three countries will inevitably compete for the same expertise.

    Day rates for tunnelling specialists are therefore likely to strengthen before this cycle reaches its peak. Clients are also expected to secure framework agreements with preferred contractors rather than repeatedly tendering individual projects, simply to secure access to equipment and specialist crews.

    Ground conditions remain the other major risk. The UAE’s gypsum-bearing and karstic geology, Riyadh’s mixed rock formations and Qatar’s high water table have already generated cost and programme surprises on previous tunnelling contracts. Delivering this volume of work within overlapping construction schedules makes it likely that some projects will experience delays or cost overruns.

    The contractors that have absorbed the lessons from Riyadh Metro’s earlier phases and Dubai’s Blue Line, rather than simply bidding aggressively to secure a share of a buoyant market, are likely to emerge strongest.

    The GCC’s tunnel boom is not a passing trend. The real question over the next decade is not whether governments will continue commissioning underground infrastructure, but which contractors have built the capability to deliver it without the delays and cost overruns that have affected comparable tunnelling booms elsewhere.

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    Yasir Iqbal