Selection of Consultancy Services for Detailed Engineering Design and Construction Supervision of: Water Supply Systems; and The Kotu Faecal Sludge Treatment Plant, together with the Rehabilitation of Sanitation Infrastructure in Kotu and Banjul.
NAWEC is seeking a consulting firm for a World Bank financed assignment under the Gambia Water and Sanitation Project. The work covers feasibility studies, detailed engineering design, procurement support, construction supervision, and defects liability support for urban water supply systems in Kombo East and urban sanitation infrastructure in Kotu and Banjul. The notice says the assignment lasts 46.5 months and uses a quality and cost based selection process. It also sets out experience based shortlisting criteria for firms and says key experts are not evaluated at the shortlisting stage.
Overview
National Water and Electricity Company Limited, through the WASAP Project Implementation Unit, is inviting eligible consulting firms to express interest in providing consulting services for the project. The assignment is financed by the World Bank as part of the Gambia Water and Sanitation Project. It concerns preparation and implementation support for water supply and sanitation investments in Kombo East, Kotu and Banjul.
Scope of Work
The consulting services will be undertaken in five phases: Phase 1: Feasibility Study - Review existing studies, plans, records, GIS data and infrastructure information. - Conduct socio-economic, service area, demand and affordability assessments. - Undertake detailed feasibility studies for urban water supply and sanitation investments. - Assess climate resilience, environmental and social requirements, institutional arrangements, technical options and implementation strategies. - Conduct economic and financial analyses, including lifecycle costing and investment prioritization. - Prepare feasibility reports and preliminary designs. Phase 2: Detailed Engineering Design - Undertake topographic, cadastral, geotechnical, laboratory and utility investigations. - Prepare detailed engineering designs for: - Water supply facilities including boreholes, treatment systems, reservoirs, transmission mains, distribution networks and SCADA. - Sanitation facilities include wastewater treatment systems, fecal sludge treatment plants, sewer networks, pumping stations and sea outfall improvements. - Prepare design calculations, drawings, technical specifications, cost estimates, bills of quantities, and O&M documentation. - Prepare procurement-ready engineering packages. Phase 3: Procurement Support - Prepare complete bidding documents and technical specifications. - Participate in pre-bid meetings and site visits. - Provide support during bid evaluation and contract award processes. - Respond to technical clarifications and prepare addenda where required. Phase 4: Construction Supervision and Contract Administration - Supervise construction works and administer contracts. - Monitor quality assurance, environmental and social compliance, occupational health and safety, cost and schedule performance. - Review contractor submissions and oversee testing and commissioning. - Support handover and completion. Phase 5: Defects Liability Support - Conduct inspections during the defect’s liability period. - Verify correction of defects. - Support final completion and contract close-out. Duration The estimated duration of the assignment is 46.5 months, including feasibility studies, design, procurement support, construction supervision, and defects liability support.
Requirements & Qualifications
The qualifications and experience of Key Experts shall not be included in the shortlisting criteria. Key Experts will not be evaluated at the shortlisting stage.