The operation includes the construction of a new Central Sewerage Pipeline in the settlement of Kamena Vourla in replacement of the existing pipeline The existing Central Pipeline of the settlement of Kamena Vourla has been constructed in the early 1990s and due to its age over 20 years has suffered significant damage, resulting in severe weather conditions rendering it non-functional and therefore dangerous for public health and the environmentThe complete construction of the sewerage network in the settlement of Agios Konstantinos in the Municipality of Kamena Vourla in the Prefecture of Fthiotida with the construction of a total of 19949 m of gravitational and depressive sewerage pipes and five pumping stations for the transportation of wastewaterThe construction of the new wastewater treatment plant of Agios Konstantinos WWTP together with the final disposal project of treated wastewater at sea with a capacity of 5200 equivalent persons with the possibility of immediate expansion for a capacity of 7800 equivalent persons with a full tertiary treatment system The final disposal pipeline the treated sewage in the sea includes a land section of 2650m length and an underwater section of 500m length with a diffuser at the end of the project.