Railway Bitola - Kremenica Railway Bitola - Kremenica is a project for the purpose of which Stenton Gradba delivered construction materials as the only company in the Bitola region that has certified concrete, river aggregate and buffer in compliance with the European standards. Stenton Gradba delivered over 200,000.00 m3 of embankment material and over 15,000.00 m3 of concrete.