Transformer substation Chtrást, repair of rainwater drainage

Repair of rainwater drainage. Due to the length of the drainage system, trenchless UV-liner technology was used. The part of the drainage between Drainage Pit No. 1 and No. 2 was completely replaced with a new one together with drainage pits. Warning signs were renewed on all manholes and hatches were replaced with new composite ones. Stone blocks were rehabilitated at the drainage outlet.