In May 2018 construction was completed of a major expansion of the Turkmenbashy seaport. Cost of the project was $1.5 billion. The general contractor for the project was Gap Inşaat, a subsidiary of Çalık Holding of Turkey. The expansion added 17 million tons of annual capacity, making total throughput including previously existing facilities of over 25 million tons per year. The international ferry and passenger terminals will be able to serve 300,000 passengers and 75,000 vehicles per year, and the container terminal is designed to handle 400,000 TEU (20-foot container equivalent) per year.