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.

PIPELIFE PE100, SDR11, PN16, D315X28.6MM VALVES, HYDRANTS, FITTINGS

WS Transmission main – Pipe-laying

PIPE WELDING SURVEY VERIFICATION

6NR RIVER-CROSSINGS IN TOTAL

RIVER CROSSING BY PREFABRICATED CONCRETE SLABS PIPE THERMAL INSULATION AND SEALING FOR RIVER CROSSING

PREFABRICATED BASE SLAB WITH HORIZONTAL WATER STOP

PREFABRICATED ROOF SLAB

SLUMP TEST AIR CONTENT TEST

CONCRETE TEMPERATURE CONCRETE MOLDS FOR COMPRESSIVE STRENGTH AND WATER-TIGHTNESS TESTING

PRESSURE TESTING AS PER EN805 EXISTING SHAFT ON TRANSMISSION MAIN

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.

SERVICE LINES PIPELIFE PE100, PN16 VALVES, FITTINGS

PIPE SADDLES, SERVICE VALVES, HOUSE CONNECTIONS FITTINGS

PIPE MATERIAL PE100, PN16

EXISTING CULVERT CROSSING PE PIPE WELDING

CONNECTION TO EXISTING CHAMBER SMALL DIAMETERS PE PIPE WELDING

ABOVE GROUND HYDRANTS UNDERGROUND HYDRANTS

ABOVE GROUND HYDRANTS COMMISSIONING

UNDERGROUND HYDRANT COMMISSIONING

HOUSE CONNECTION WITH SERVICE VALVE AND PIPE SADDLE

HOUSE CONNECTION WITH SERVICE VALVE AND PIPE SADDLE

SERVICE VALVE SPINDLE PE 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

CORRUGATED HDPE 100, SN8 PIPES ID300-1000MM CORRUGATED HDPE 100, SN8 PIPES ID300-1000MM

CORRUGATED HDPE 100, SN8 PIPES ID300-1000MM PVC ID100MM PIPES – HOUSE CONNECTIONS

PREFABRICATED CONCRETE SHAFTS PREFABRICATED CONCRETE SHAFTS

GEO-TEXTILE WRAPPING

PIPE LASER USE FOR PRECISE PIPE-LAYING SURVEYING & CONTROL

PREFABRICATED MANHOLES

COLLECTING SHAFTS WITH HOUSE CONNECTIONS

IN-SITY BUILT COLLECTOR-CONNECTION MANHOLES

IN TOTAL 49NR OF MANHOLES INSTALLED ON E-W COLLECTOR

IN TOTAL 3NR STORM OVERFLOWS INSTALLED ON E-W COLLECTOR

IN TOTAL 4NR OUTLET STRUCTURES BUILT ON E-W COLLECTOR DISCHARGE LOCATIONS

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

PVC PIPES LEFT FOR CONNECTION WITH HOUSE SHAFT

RIVER “TAVIA” INCASING DURING COLLECTOR RIVER-CROSSING WORKS

IN TOTAL 32NR MANHOLES INSTALLED ON N-S COLLECTOR

CASCADE CHAMBER HOUSE SHAFT

COLLECTION SHAFT (IN TOTAL 38NR HOUSE CONNECTIONS INSTALLED ON N-S COLLECTOR)

1NR OUTLET STRUCTURE INSTALLED ON NORTH – SOUTH COLLECTOR. FUTURE PROJECTS WILL CONTINUE COLLECTOR TO WASTE WATER TREATMENT PLANT

TIGHTNESS TESTING PERFORMED IN ACCORDANCE WITH EN1610 STANDARD

IN ACCORDANCE WITH ATV M14 PART 2

WW COLLECTOR’S CCTV RECORDED LONGITUDINAL PROFILE

SURFACE REINSTATEMENT / COMPACTION