Project Title: Rehabilitation of the Urban Water Supply and Sanitation in the Sava River Basin in Bosnia and Herzegovina, (BMZ ID 2002 65 876). Rehabilitation of Urban Water Supply Una-Sana region, Consulting Services (Part A)
Project Description: rehabilitation of Water Supply Systems & Sanitation on war affected areas. Drinking water supply network, total capacity: 61,600 m³/d, total number of inhabitants: 150,000, total length (transport mains and network): 45km of pipe main (ductile, PE), 1.500nr house connections; RC water reservoir Q=700m3, SCADA System. Sewage system works: 2nr of pump stations, 30km of network (HDPE), 800nr of house connections.
City of Kakanj WW Project (KA 01): 9,265m of Corrugated HDPE SN8 Pipes (DN250-1200), 265nr maintenance inspection RC shafts, 18nr backdrop shafts, 3nr Storm Water Overflows, 2nr Outlet Structures, 139nr House Collection Shafts, 496nr of households connected to new 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
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
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.