Reconstruction and extension of Sewer network in Usti nad Labem

Another part of the project was dedicated to the extension of the existing sewer capacity in Masarykova Street and the removal of the storm water overflow chamber OK2. The existing sewer outlet was newly connected, so that sewage is now pumped into the gravity sewer leading to the Ústí nad Labem wastewater treatment plant. The original non circular line running below the overflow chamber was replaced with a larger HOBAS CC-GRP DN 1600 SewerLine® sized DN 1600, further slightly smaller non circulars above the OK2 were substituted with CC-GRP DN 1400 Pipes. The length of the extended section adds up to 413 m. Further extensions were conducted after the assessment of the existing sewer. Non circular lines DN 400/600 and DN 500/750 had served for over 100 years and had come to the end of their lifecycle, and two overflow chambers OK7 and OK8 in Masarykova Street were located closely to each other yet did not fulfill their purpose. A total length of 797 m had to be reconstructed. Various diameters of HOBAS CC-GRP SewerLine ranging from DN 600 to DN 1000 were utilized to replace the antiquated egg-shaped line and to extend its capacity.