Download - Kostajnica City - WS/WW Project
Rehabilitation of the Urban Water Supply & Sanitation in Sava River Basin (BMZ ID 2002 65 876) Water Supply Scope: Existing gravity feed Transmission main between Source Mraovo Polje and the City is approx. 25 years old and in a poor
condition resulting in approx. 5 numbers of significant repairs works per year. To ensure the water supply of the city of Kostajnica it is necessary to replace approx. 6,500 m of the transmission main.
Many pipe bursts in the drinking water network occur every year in the city centre of Kostajnica. These parts of the city network consist of approx. 30 years old CI pipes. So it is necessary to replace these parts of the city network. Approx. 2400 m (OD90, 180mm) pipes and furthermore 200 house connections in these parts must be replaced
Project Budget for WS scope – 1.000.000,00EUR Waste Water Scope: The existing sewer system has the following defects: Inflow and Infiltration of the sewer system; Cycle flow; Pipe clogging;
Pollution of the Tavija River Construction of a new collector from west to east main collector with HDPE pipe material and a diameter ranging from OD 400
to OD 800 shall be laid in the northern part of the city, stretching approximately 4,850m from west to east. In the south of Kostajnica, on the right bank of the Tavija River, a new combined sewer system consisting of a main collector
and a secondary network will be constructed. The wastewater produced by the new settlements in the south of Kostajnica will be collected by the secondary network, which has a diameter of OD 300. The secondary network will be connected to the main collector, which will be laid along the Tavija river from south to north and has a diameter ranging from OD 400 to OD 600.
Project Budget for WW scope – 1.000.000,00EUR
Water Supply Project Transmission Main
Replacement of existing gravity feed Cast Iron Transmission Main from Source “Mraovo Polje” to the City limits has been replaced in length of 7.331m (HDPE100, PN16, d315x28.6mm) Pipeline under a Project with replacement of existing Air Valves and Mud Valves in existing shafts along the pipe route.
RIVER CROSSING BY PREFABRICATED CONCRETE SLABS PIPE THERMAL INSULATION AND SEALING FOR RIVER CROSSING
MUD / DRAIN VALVE – IN TOTAL 10NR NEW DRAIN VALVES INSTALLED
AIR VALVE – IN TOTAL 9NR OF AIR VALVES INSTALLED
Water Supply – City Network
Project considered replacement of existing WS Cast Iron Pipes with PE100, PN16 Pipelines (OD63-180) in total length of 3.098m with associated 320nr House Connections. Connection onto existing network to be performed within existing node point chamber with replacement of 14nr existing valves, installation of 14nr fire-hydrants.
HOUSE CONNECTION WITH SERVICE VALVE AND PIPE SADDLE
HOUSE CONNECTION WITH SERVICE VALVE AND PIPE SADDLE
HOUSE CONNECTION / EXISTING WATER METER SHAFT CONNECTION TO THE EXISTING NETWORK / REPLACEMENT OF VALVES IN EXISTING CHAMBERS
CONNECTION TO THE EXISTING NETWORK / REPLACEMENT OF VALVES IN EXISTING CHAMBERS
CONNECTION TO THE EXISTING NETWORK / REPLACEMENT OF VALVES IN EXISTING CHAMBERS
OUT OF REMAINING BUDGET FOR WS PROJECT WORKS, WATER UTILITY KOSTAJNICA HAS BEEN PROVIDED WITH:
TERRAIN VEHICLE 4X4: LADA NIVA 2131, 1,7I; FLAT BED VEHICLE: IVECO DAILY, 35S11D, 3,5T; BACKHOE LOADER: JCB 3CX SITE MASTER 4T
Waste Water Project East – West Collector
Originally waste water system (combined type) has suffered from Inflow and Infiltration of the sewer system due to the poor construction quality of the concrete pipe joints. Due to poor and wrong construction, in some sewage pipes the wastewater flows in both directions and causes cycle flow. Due to heavy overloading, the collector located in Svetosavska Main Street was often clogged. Under this Project relieve of the existing system was planned, decrease of pollution by replacement of existing collectors and house connections, waste water transport and discharging at 4nr locations with combined system Collectors - Corrugated HDPE100, SN8: -ID300 mm – 8m -ID400mm – 94m; -ID500mm – 1.075m; -ID600mm – 61m; -ID800mm – 1.640m; -ID1000mm – 115m -In total – 2.993m of collectors installed with 28nr of House Connections (PVC ID 100mm) and 5nr Road Gullies
WW North – South Collector
Originally no sewage system existed where inhabitants private connections discharged waste water directly into the Tavia River causing the pollution. New project considered construction of North-South Collector, collection of all belonging house connections, transport and discharging at downstream location. Future projects will consider continuation of collector until the Waste Water Treatment Plant. Under this Project North South Collector was installed (Corrugated HDPE100, SN8): -ID300mm – 400m; -ID400mm – 195m; -ID500mm – 336m; -ID800mm – 163m -In total 1.094m installed with 38nr House Connections PVC ID100mm
1NR OUTLET STRUCTURE INSTALLED ON NORTH – SOUTH COLLECTOR. FUTURE PROJECTS WILL CONTINUE COLLECTOR TO WASTE WATER TREATMENT PLANT