BWB is estimated to service 66,822 individual connections, 813 water kiosks (for communal supply), and a fur-ther 3,000 commercial, industrial and institutional connections. The utility manages a reticulation system of about 1407km and 23 reservoirs (of which four clear water tanks) with an estimated capacity of 97,317m3. The management of the system is divided into three zones, Limbe, Kabula, and Soche.
The project will, (i) prioritize network upgrades to improve the hydraulic performance of the system, control pressures and leakages, (ii) improve storage capacity and reliability of supply by constructing new storage tanks and construction of solar Photo Voltaic (PV) plants stations (iii) expand the services to new unserved areas, us-ing the water recovered from leakage and the additional production capacity.
As part of this consultancy, BWB plans to carry out a hydraulic study on its reticulation system and is envisaging a three-stage approach to stabilize the network and improve efficiency in water supply. The first stage would fo-cus on priority network interventions to improve the hydraulic performance of the system, control pressures and leakages. A second stage would encompass a physical water loss reduction program through an internal per-formance-based mechanism. The third phase relates the network expansion to increase coverage. The network expansion will be undertaken through improvements in the efficiency of the existing system, savings from physi-cal water loss reduction activities, construction/upgrading of a treatment plant at Mudi or a combination of these three.
The following deliverables were finally agreed based on the ToR.
(i) preparation of detailed designs, drawings, and specifications for the priority network rehabilitation and upgrades (including storage reservoirs), which will be identified through the hydraulic study;
(ii) hydraulic analysis and preparation of detailed designs, drawings, and specifications for network ex-pansion investments;
(iii) preparation of detailed designs, drawings, and specifications for the construction of Solar PV plants in pumping stations;
(iv) preparation of tender document for both the priority network upgrades and network expansion works; and
(v) construction supervision of all network interventions.
(vi) Ensuring compliance with and Environmental and Social risk management requirements