Kalyon completes Danube River crossing for Tuzla‑Podișor pipeline in Romania
Kalyon İnşaat has successfully completed the Danube River crossing of the Black Sea Shore – Podișor Natural Gas Pipeline Project in Romania, with the works finalised in 2025.
The project is owned by Transgaz, Romania’s national gas transmission operator, and represents one of the most technically demanding sections of the overall pipeline.The Danube crossing, approximately 1,815 metres in length and 40 inches in diameter, was executed using horizontal directional drilling (HDD) beneath the riverbed, reaching depths of up to 63 metres.
The works were carried out under challenging geological and hydrogeological conditions and required precise drilling control to protect the river environment and ensure installation accuracy. In addition, Kalyon completed a 1,300-metre HDD crossing beneath the Borcea branch of the Danube, also using 40-inch diameter pipe. The Black Sea Shore – Podișor Pipeline has a total length of approximately 308 km, comprising 48-inch and 40-inch diameter sections, and is listed as a European Union Project of Common Interest (PCI). The project plays a key role in strengthening regional gas transmission capacity and European energy security.
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