Preparation of Detailed Design, Tendering and Works Supervision for the Rehabilitation, Restructuring and the Extension of Kampala Water Supply Network – KW WATSAN Package 2B
Client
financier
Project description
Project scope
As part of the greater KW-LV WATSAN project, the overall objective of the project is to ensure that the water produced is distributed to the customers in a sustainable, continuous, hygienically acceptable manner at socially acceptable costs. However, operation and management of the existing Kampala water distribution network is troubled with a number of challenges that include: ageing assets, relatively high physical losses, numerous dry (no-water) zones among others. Therefore, the need to address these current water distribution challenges, and to meet the anticipated future water demand for Kampala (including delivery of additional water produced from the Ggaba 1 & 3 refurbishment and the Katosi water treatment plant) call for critical improvements and expansion of Kampala’s water distribution network. The project is aimed at improving bulk water transfer and supply within the Kampala water supply area, so as to satisfy both the 2025 and 2040 water demand, through:
- Restructuring, expansion and extension of the transmission, primary, secondary and tertiary system, and associated reservoir and booster stations;
- Densification of the secondary and tertiary distribution network
- Rehabilitation and replacement of parts of the transmission, primary and secondary system
Implementation of the project also includes creation of network/pressure zones, pressure management and activities for technical and administrative water loss reduction. These interventions are aimed at achieving, among others, the following broad objectives:
- Ensuring that the additional water production resulting from rehabilitation and modification of the Ggaba WTP complex (Package 1 & 3) and the planned new WTP east of Kampala (Katosi) reaches the intended customers.
- To reduce Non-Revenue Water (NRW) in the currently covered area of Kampala
- To expand reservoir storage capacity for Kampala to guarantee an appropriate balancing volume that meets NWSC’s operational, emergency and disaster response obligations
- To ensure that the entire network is divided into clear water network pressure zones for effective operations and management
- Data review/preliminary studies and investigations aimed at collecting data/information which will form the basis for the design.
- Determination of design criteria, taking into account optimization of operation, maintenance and investment costs
- Update and extension of the hydraulic model developed under the 2015 Kampala Water Supply Masterplan for the scenario 2025-2040
- Hydraulic analysis of the transmission, primary, secondary, and if relevant, tertiary systems
- Proposal of at least three options for horizon 2040, and recommendation of the best option for the Employer’s decision
- Preparation of detailed engineering designs for the water supply network (~287km of new mains and 26 km of replacements, all of sizes OD110 uPVC to DN1400 DI), and preparation of detailed engineering designs for the electro-mechanical components, taking into account network control requirements, power usage optimization, and automation by way of Katosi SCADA System linked to Gaba Water Works station
- Undertaking comprehensive land, topographic and Geotechnical investigations and tests along the pipelines and other installations e.g. reservoirs/tanks, booster locations, and other structures for purposes of elaborating the detailed engineering designs, the Resettlement Action Plan and the tender documents
- Undertaking Environmental and Social Impact Assessment (ESIA) and supporting NWSC in obtaining all the necessary approvals
- Preparation of a Comprehensive Resettlement Action Plan (RAP) for the transmission and distribution mains, reservoirs and booster pumping stations, and its implementation including land valuation, compensation and acquisition, acquisition of wayleaves/easements for the pipeline routes, land for installations, and implementation of the RAP.
- Support NWSC in the land acquisition process for the proposed sites and wayleaves until the land is registered in the names of NWSC
- Carrying out a complete risk analysis of the project and proposing mitigation measures. Updating the risk matrix monthly during project implementation.
- Preparing of a proposal on the packaging/lotting of the works; Preparation of Tender documents - FIDIC (Redbook) - and Engineering cost estimates
- Procurement of a works Contractor (from prequalification up to works contract signature), including prequalification documents for works.
- Supporting NWSC in the management of all Works pre-commencement activities, Construction Supervision of the associated works (by packages/lots), including commissioning of the works, and supervision of the relocation of existing services
- Superintendence over the Defects Notification Period
