Global Super-Engineering Competition: From the Medog Hydropower Station to NEOM's Infrastructure Restructuring

The Global Order Restructuring Behind Super Projects

In mid-2026, a ranking of the world's largest projects under construction paints a complete picture of contemporary infrastructure competition. From China's hydropower mega-structure in the Yarlung Tsangpo Grand Canyon in Tibet, to the NEOM new city in Saudi Arabia's northwestern desert; from the railway network connecting the six Gulf states, to the new capital rising from Indonesia's rainforests—these projects, with investments measured in the tens of billions of dollars, are reshaping the global energy map, logistics corridors, and urban forms.

These projects are no longer merely architectural marvels; they are the convergence point of national will, engineering capital, and long-term regional strategy. Understanding them helps gauge the trajectory of global infrastructure over the next two decades.

Energy and Water: Mega-Projects of National Lifelines

The Medog Hydropower Station, at the top of the list, is a milestone in the history of human engineering. This hydropower facility, planned with an installed capacity of 60 gigawatts—nearly three times that of the Three Gorges Hydropower Station—began construction in July 2025 in Tibet, China. The project exploits the 2,000-meter elevation drop at the great bend of the Yarlung Tsangpo River, diverting water through four 20-kilometer-long tunnels to generate electricity, with an expected annual output of 300 billion kilowatt-hours. Developed by PowerChina, it is scheduled to enter commercial operation in 2033.

However, Medog's significance extends far beyond electricity itself. The lower reaches of the Yarlung Tsangpo form the Brahmaputra River, a primary water source for more than 130 million people in India and Bangladesh. China's effective control of upstream flows inevitably makes the project a geopolitical focus. This is as important as the project's own technical challenges—it marks the deep embedding of water infrastructure in transnational security narratives.

Equally illustrative of national resource allocation logic is China's South-to-North Water Diversion Project. This $62 billion inter-basin water transfer project delivers water from the Yangtze River basin to the arid north through thousands of kilometers of canals, tunnels, and pumping stations. The eastern and central routes are already operational, while the western route is still under construction; the entire project is expected to take 50 years. It reflects the priority given to climate-resilient infrastructure development in populous countries.

In the Middle East, Saudi Arabia's Jubail Industrial City Phase II (Jubail II) represents a different energy logic—the transition from fossil fuels to the chemical industry and clean hydrogen. Within the 6,200-hectare site, petrochemical, carbon capture, ammonia, and hydrogen facilities are densely arranged, with the goal of becoming one of the world's largest petrochemical complexes by 2035. This is not merely industrial expansion; it is Saudi Arabia's attempt to reshape the cornerstone of its national economy in the post-oil era.

Cities as Strategy: New Capitals, Megacities, and Desert New TownsAmong the list of megaprojects, urban development projects occupy a prominent position. Indonesia's new capital, Nusantara, is a national political center being built from scratch deep in the Borneo rainforest. Due to Jakarta's land subsidence and overpopulation, the Indonesian government decided to move the capital. Although the project scale and public funding have been reduced under President Prabowo, and about 10,000 people have now moved in, the core government area, including the presidential palace, ministry buildings, and civil servant housing, has begun to take shape. This "green smart city," which relies mainly on renewable energy and emphasizes ecological protection, reflects an attempt by Global South countries to break new ground on the path of urbanization.

Saudi Arabia is simultaneously advancing multiple urban projects at the ten-billion-dollar scale. NEOM is the largest engineering zone among them, covering 26,500 square kilometers, with sub-projects planned such as the industrial port Oxagon and the mountain tourism city Trojena. Its flagship concept, "The Line," is a 170-kilometer-long linear city, but because costs surged to $8.8 trillion, Saudi Arabia's Public Investment Fund suspended that portion of construction in September 2025, shifting priority to green hydrogen and AI data centers. NEOM has so far received cumulative investment of about $50 billion, showing that even resource-rich sovereign wealth funds must strike a balance between grand vision and fiscal reality.

Similarly, King Abdullah Economic City is another mega urban project on the Red Sea coast, covering 173 square kilometers and planned to accommodate 2 million people, including a deep-water port, industrial zones, and a central business district. In May 2025, Emaar Economic City awarded infrastructure contracts worth $145.9 million, involving the "Industrial Valley" and the first phase of the King Salman Automotive City. Although these projects are progressing slowly, they reflect Saudi Arabia's long-term commitment to economic diversification under its "Vision 2030."

Dubai's mega development projects place even greater emphasis on global connectivity. Dubailand covers 278 square kilometers, featuring theme parks and leisure complexes, adopting 3D printing and robotics, and setting a net-zero emissions target. An even bigger undertaking is the expansion of Al Maktoum International Airport, which is set to become the world's largest, covering 56 square kilometers, with a target annual passenger capacity of 255 million, five runways, and four terminals. In the future, Emirates and flydubai will relocate their operations entirely, making the capacity of Dubai International Airport completely surpassed. This reflects the Gulf region's ambition to build itself into a global aviation and logistics hub.GCC Railway is another megaproject set to reshape the regional landscape. This 2,177-kilometer network will connect Saudi Arabia, the UAE, Qatar, Bahrain, Kuwait, and Oman, making it the first cross-border railway system in the Gulf region. With a passenger service speed of 200 km/h, it will shorten the journey from Abu Dhabi to Dubai to under one hour. In April 2025, Kuwait signed an $8 million design contract with Turkey's Proyapi company, while Saudi Arabia separately tendered a $7 billion land bridge project (the Riyadh-Jeddah line). Contractors such as China Railway Construction Corporation are deeply involved. The GCC Secretariat expects the railway to be completed by 2030. The core significance of this corridor lies in tightly connecting the Gulf economies that currently rely on road and air transport, forming a truly unified regional market.

In the United States, California High-Speed Rail is the largest public infrastructure project in the country to date, planned to extend from San Diego to San Francisco, with a total length of 800 kilometers. Construction is currently concentrated on the 171-mile initial section from Merced to Bakersfield, with more than 80 miles of guideway completed, and a track-laying contract was signed in June 2026. However, costs have ballooned from an initial $33 billion to between $89 billion and $128 billion, and more than $5 billion in federal funding has been withdrawn. The initial section is now expected to open as late as 2033. This highlights the financing difficulties and institutional frictions that developed economies face in large-scale transportation projects.

These megaprojects share common characteristics: extremely high capital intensity and long construction periods. Project financing models are becoming increasingly diversified, with sovereign wealth funds (such as Saudi Arabia's PIF), multinational contractors, development banks, and private capital playing different roles across various projects. From EPC turnkey contracting to PPP models, the risk structures borne by engineering firms are also evolving. Chinese engineering companies such as China Railway Construction Corporation, China Railway Group, and PowerChina are deeply involved in projects across multiple countries, transforming domestically accumulated infrastructure capabilities into global engineering capital.

Meanwhile, ESG factors are beginning to influence project evaluation. From the green energy plans for Indonesia's new capital, to the net-zero goals of Dubai's leisure districts, to the carbon capture facilities in Jubail, infrastructure investment is increasingly being required to align with climate goals. In actual execution, however, these commitments are often undermined by cost overruns and schedule pressures, creating a complex balancing act.

The Future Landscape of Infrastructure Competition

Looking across the world's largest projects in 2026, a clear theme emerges: infrastructure has become a core vehicle for nations' long-term competitiveness. Whether it is China strengthening resource security through giant hydropower stations and water diversion projects, Saudi Arabia driving economic diversification through new cities and railways, or the Gulf region building global logistics hubs, what lies behind all of these is a contest for development space in the post-fossil-fuel era.For development institutions, engineering firms, and investors, these projects offer not just construction contracts, but a key window into understanding the long-term trajectory of regional economies. Whoever can master technology, capital, and governance capabilities in mega-projects will be qualified to participate in shaping the next round of global infrastructure rules. And in this competition spanning decades, the true winners may be those nations that can translate engineering visions into sustainable social functions at a reasonable cost.