South Korea is investing $540 billion in a southwestern chip hub that the current power grid is not equipped to support.

      South Korea intends to establish its next significant chip cluster far from Seoul, in the rural southwest of the country, and aims to do so at an unprecedented pace. However, this plan faces a significant obstacle beyond any zoning regulations, since the area currently lacks the electricity and water necessary for its operation.

      The Honam semiconductor complex, a substantial investment of approximately 800 trillion won ($540 billion) backed by President Lee Jae Myung, is scheduled to become operational by the end of 2030. This initiative is part of a larger effort valued at over $880 billion, which encompasses chips, AI, and data centers. It heavily relies on Samsung Electronics and SK Hynix, along with Amkor Technology Korea.

      Seoul has chosen a military airport site in Gwangju, covering around 8.3 million square meters, noted for its flat terrain, transportation links, and existing utilities. The broader strategy allocates funding across various regions, supporting Samsung’s projects in Chungcheong among others, but Honam stands out as the political centerpiece.

      According to a Reuters analysis, the four planned fabrication plants could potentially consume 70 to 80 percent of the electricity used by the southwestern provinces in a year. “A significant new power demand is emerging in a region that previously had little, which is the crux of the issue,” stated Neal Won, an analyst at S&P Global Commodity Insights.

      Planners are haunted by comparisons to Yongin, the mega-cluster developing south of Seoul, which is projected to require between 15 and 16 GW at full capacity—nearly a quarter of the capital region’s electricity demand and equivalent to the output of ten large nuclear reactors, while the local supply currently stands at under 2 GW.

      Water presents a quieter yet more stringent constraint. Advanced fabrication facilities require immense quantities of ultrapure water for rinsing wafers, and the southwestern cluster would need around 650,000 tonnes daily, exceeding the total supply Gwangju currently provides to all its residents. To address this, the government has considered raising the Dongbok Dam to secure an additional 250,000 tonnes, a plan that could impact approximately 1,500 to 1,600 households. “This is akin to dam construction,” remarked Kim Kwang-jin, who heads a group of local residents.

      The Yeongsan river basin, which the area depends on, is expected to face an annual shortfall of about 219 million cubic meters by 2030. SK Hynix’s Yongin facilities already consume around 265,000 tonnes daily sourced from a weir in another city, suggesting that significant distances may need to be covered to secure water.

      Power generation also carries political implications. To bridge the gap, the government is contemplating additional nuclear capacity and extending the operational lifespans of older reactors, a move that has drawn criticism from residents near the Yeonggwang plant on the southwest coast. “The discussion of new construction, alongside the extension of ageing reactors, signifies that Yeonggwang will become a nuclear testing site,” stated Roh Byeong-nam, a local farmer and co-chair of an anti-nuclear coalition.

      Officials are aware of the pressure. Kim Yong-beom, the presidential office’s policy chief, cautioned that “the beast known as electricity will consume us” if supply fails to meet demand.

      The region is also counting on renewable energy, aiming to increase Honam’s clean energy capacity from approximately 7.5 GW to as much as 37.7 GW by 2035, which includes 11 GW generated from offshore wind in Sinan county. However, whether this enhancement will occur on schedule remains uncertain.

      Timing is a crucial factor throughout this endeavor. At Yongin, SK Hynix advanced a fabrication plant’s completion to 2033, yet the water pipeline intended to support it is scheduled for 2034, creating a mismatch that the southwest cannot afford to repeat.

      Currently, the ambition is clear, but the necessary infrastructure is lacking. What unfolds next in the country’s upcoming basic power plan, along with the approvals for the dam and grid, will ultimately determine whether the southwest evolves into Korea’s new silicon heartland or becomes a cautionary tale of hasty construction outpacing the land’s capabilities.