The United States has proposed increasing the cost of the Texas Ensinal Gas Combined Cycle Power Plant from $19.8 billion to $25 billion, a roughly 25% rise that would add $5.2 billion, or about 7 trillion won. The plant is South Korea's first planned investment project under a broader U.S. commitment totaling $200 billion. Seoul has completed much of its feasibility review using the original budget but says the U.S. explanation, which cites water-supply issues, lacks concrete data on facilities, construction requirements and cost calculations. South Korea will conduct a further review of costs, profitability, interest rates and recovery prospects after receiving additional information, while Washington continues pressing for a swift investment announcement. The two sides are also negotiating profit allocation and an interest rate linked to the 20-year U.S. Treasury yield, approximately 5.2% annually, plus a spread. Domestic pressure has increased amid personnel changes in South Korea's investment-management bodies and competing U.S. interest in semiconductor projects.