Currently more than 60% of the 281km of new pipelines for drinking water and a 219km force sewage network are in operation within West Pomerania’s Parseta river basin area, helping to meet growing community needs as well as EU standards. In many cases drinking water had been drawn directly from deep underground wells with inadequate or no treatment before the network was built. Furthermore, some of the previous pipelines were placed on asbestos cement, which is now banned in many countries as a health hazard.
The three year network renewal project, planned and overseen by the Regional Water and Sewage Company, began in November 2008. TYTAN multilayer PE100-RC pressure pipes from Polish producer Przedsiebiorstwo Barbara Kaczmarek Sp J, based on BorSafe HE3490-LS-H and BorSafe HE3494-LS-H, were selected in order to provide the required long-term service reliability and meet the cost constraints and tough laying conditions of this major project.
Owing to the mix of urban and rural environments covered by the network, the region’s water and sewerage system specialist, EkoWodrol Ltd of Koszalin, determined that both open trench installation and the more environmentally-friendly directional drilling method would be necessary to avoid disruption in the built-up areas and to preserve locations of natural beauty. Ease and therefore speed of installation, and pipe integrity to minimise potential maintenance requirements were given top priority because of the location demands and the overall large scale of the project.