The document outlines the rehabilitation of the urban water supply and sanitation in the Sava River basin, focusing on existing sewer system defects that contribute to environmental and public health issues. It details the construction and rehabilitation of separate sewer systems and stormwater overflow structures across various zones, along with plans for house connections and necessary equipment. The total project budget is €2,000,000, with extensive specifications for materials and installation progress, resulting in 496 new household connections to the wastewater system.

2.  Rehabilitation of the UrbanWater Supply & Sanitation in Sava River Basin (BMZ ID 2002 65 876)
 The existing sewer system has the following defects:
 · Low connection rate. In the city centre of Kakanj, the existing sewer system serves only 35 % of the inhabitants,
who are connected to the public water supply system of. The other inhabitants discharge the wastewater without
authorization on to the land, which has caused severe environmental and public health problems.
 · In the settlement, where a separate sewer system is existent, some house connections have been connected to the
storm water pipes instead of to the wastewater pipes. This will cause the pollution of the water body if the
wastewater shall be treated in aWWTP in the future.
 · An important drinking water source “Pitka Voda”, which is situated near the city centre and is recharged with water
from the Zgosca river by bank filtration. The nearby discharge of the untreated wastewater into the Zgosca river will
cause severe damage to the drinking water supply.
 Some sewers don not discharge the collected waster water into a receiving water body, e.g. the Zgošća river or
Bosna river, but without authorization on to the land, which has caused severe environmental and public health
problems.
 · The sewerage collectors in the settlements of Mile and New Bare discharge the wastewater into the nearby creeks,
which flows through a valley before it reaches the Bosna river. This caused, the valley is very often flooded by
wastewater.

3.  Lot 1: Construction of a separate sewer system in Zone 1 - DN250-400, L=4,623m
 Lot 2: Construction of a separate sewer system in Zone 2 - DN250, L=1,546m
 Lot 3: Construction of a separate sewer system in Zone 3 – DN250, L=1,098m
 Lot 4: Rehabilitation of the existing sewer system in Zone 4 - DN1000, L=30m
 Lot 5: Rehabilitation of the existing sewer system in Zone 5 – DN400, L=437m
 Lot 6: Rehabilitation of the existing sewer system in Zone 6 – DN350-400, L=1,150m
 Designed length in total – 8,854m
 Storm Water Overflows - the construction of three storm water overflow structures shall be also included in the
scope of works. Two storm water overflow structures shall be integrated into the existing sewer mains. One storm
water overflow structure shall be constructed at the connection of the existing and the new sewer mains.
 Inspection / Maintenance Shafts - the construction and integration of approximately 298 maintenance shafts (incl. 18
backdrop shafts) into the existing sewer mains shall be included in the scope of works.
 Bridge Foundation Crossing: the bridge crossing is located at the end of Zone 1. The main collector will run through
the foundation of the city bridge.
 House Connections – The Contractor is to provide material and construct approx.294pcs, while as a part of Water
Utility’s “contribution”, Water Utility is to construct approx.293pcs of House Connections from material provided by
the Contract
 Water Utility Kakanj is to be provided with the following mechanization: Hydraulic Excavator, Backhoe Loader &
Pick-up vehicle
 Project Budget – 2,000,000.00EUR

5. PROJECT SIGN BOARD
PIPE MATERIAL:
CORRUGATED HDPE SN8 PIPES (DN250-1200)
PVC SN4 (DN160-200)

6. SHAFT COVERS, VARIOUS MATERIAL PREFABRICATED MAINTENANCE SHAFTS

7. PREFABRICATED MAINTENANCE SHAFTS PREFABRICATED COLLECTION SHAFTS

8. WU PROVIDED UNDER CONTRACT WITH:
HYDRAULIC EXCAVATOR NEW HOLLAND
BACKHOE LOADER NEW HOLLAND &
PICK-UP VEHICLE TOYOTA HILUX 4X4

10. GEO-TEXTILE PIPE WRAPPING

13. Bridge Foundation /
Pipe Jacking

18. PIPE-SADDLE CONNECTION OF HOUSE CONNECTION

20. PREFABRICATED COLLECTION SHAFT IN-SITY DRILLING FOR
HOUSE CONNECTION

21. COLLECTION SHAFT

22. CASCADE SHAFT

23. CONCRETE CULVERT INSPECTION SHAFT

24. STROM WATER OVERFLOW (SWO1) WITH OUTLET
STRUCTURE

25. STORM WATER OVERFLOW WITH OUTLET STRUCTURE

26. STORM WATER OVERFLOW (SWO3)

27. STORM WATER OVERFLOW (SWO3)

28. OUTLET STRUCTURE WITH FLAP VALVE

33. LAID ALONG THE MAGISTERIAL ROAD RIVER BOSNA OUTLET STRUCTURE

34. RIVER BOSNA OUTLET STRUCTURE RIVER BOSNA OUTLET STRUCTURE

35. DOWNSTREAM PIPE CLOGGED BY BALLON UPSTREAM SHAFT FILLED WITH WATER

36. COLLECTOR FLUSHING CCTV INSPECTION

39. Zone 1 –Take Over
Inspection
In total installed:
HDPE (SN8) DN250 – 3,801m;
HDPE (SN8) DN300 – 580m;
HDPE (SN8) DN350 – 21m;
HDPE (SN8) DN400 – 16m;
Total Collector length 4,418m;
Total House Connections – 277nr

42. Zone 2 –TakeOver
Inspection
In total installed:
HDPE (SN8) DN250 – 1,781m;
Total House Connections – 87nr

44. CASCADE SHAFT

45. Zone 3 -Take Over
Inspection
In total installed:
HDPE (SN8) DN250 – 95.35m
Total House Connections – 2nr

46. Zone 4 -TakeOver
Inspection
In total installed:
HDPE (SN8) DN500 – 80m
HDPE (SN8) DN1000 – 20m
Total Collector length 100m;

47. Zone 5 –Take Over
Inspection
In total installed:
HDPE (SN8) DN250 – 590m
HDPE (SN8) DN400 – 424m
Total Collector length 1014m;
Total House Connections – 51nr

48. Zone 6 –Take Over
Inspection
In total installed:
HDPE (SN8) DN250 – 340m
HDPE (SN8) DN350 – 200m
HDPE (SN8) DN400 – 935m
Total Collector length 1,475m;
Total House Connections – 73nr

50. CONNECTION TO EXISTING SYSTEM

51. MainCity Collector
DN1200Take Over
Inspection
In total installed:
HDPE (SN8), DN1200 – 382m

52. Remaining Budget
Considering the remaining Budget,
the following material has been
provided for WU “Vodokom” Kakanj :
HDPE (SN8) Pipes:
DN250 Pipes – 1,000m;
DN400 Pipes – 250m;
PVC (SN4) Pipes
DN160 – 1,500m;
DN200 – 1,500m;
Pipe saddles DN250/160 – 100pcs;
Flat Bed Vehicle IVECO
In total 265nr maintenance shafts
have been installed under the Project,
139nr of House Connection Collection
Shafts.
Total number of installed House
Connections (households connected)
to new WW System – 496nr.