OREANDA-NEWS. October 23, 2007. At OAO “Koks” reconstruction of the silo №11 has been completed. At the moment silo is ready for exploitation. It will enable the enterprise to store over two thousand tons of coal in excess. Silos of OAO Koks can store 45 thousand tons of coal. Reconstruction of the silo №11 was executed with the help of subcontractor Spetszhelezobetonstroy.