With glass fiber reinforced concrete GRC (GFRC) technology, we can realize almost every infrastructure project nowadays. Due to the fact that this material can be used in all conditions, it is well suited to the modernization of old channels and different kinds of work in municipal sewerage. It is used in works both inside and outside of buildings. It can be found in water channels, excavations and many other environments that are not conducive to easy work. GRC concrete is, however, a material that can be easily transported to any location. Thanks to its advantages, which include versatility, durability and strength significantly exceeding the traditional architectural and structural concrete, it is increasingly desired by professionals. Resistance of GRC concrete to adverse factors, such as frost, corrosion and pollution, make it suitable even for such heavy work as opencast modernization of old channels but there is also possibility of modernization where the excavations are not necessary …!