Engineering studies and supervision for water supply systems in Kombo East — Gambia Water and Sanitation Project

Original title: 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.

Deadline

October 5, 2026

Closed

Published on September 14, 2026 at 12:00 AMModified on September 16, 2026 at 01:02 AM

Key information

Type: Water & Sanitation
Location: Gambia, The
Deadline: October 5, 2026 at 12:00 AMClosed
Estimated Value: Not disclosed
Language of Notice: English

What is this tender about?

Engineering studies and supervision for water supply systems in Kombo East — Gambia Water and Sanitation... is a water & sanitation procurement opportunity published by NATIONAL WATER AND ELECTRICITY COMPANY in Gambia, The on September 14, 2026. Submissions closed on October 5, 2026. 1 official document is attached below.

Urban sanitation investments including rehabilitation and expansion of wastewater and sewerage infrastructure in Kotu and Banjul, fecal sludge treatment facilities, pumping stations, and associated infrastructure. Scope of the Services 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. National Water and Electricity Company Limited (NAWEC), through the WASAP Project Implementation Unit (PIU), now invites eligible consulting firms (“Consultants”) to indicate their interest in providing the Services. Interested Consultants should provide information demonstrating that they have the required qualifications and relevant experience to perform the Services. Shortlisting Criteria Interested firms should demonstrate: • At least 15 years of experience in water supply and sanitation engineering. • At least 10 years of experience in feasibility studies, detailed design, and construction supervision of urban water and sanitation infrastructure. • Demonstrated experience in water treatment facilities, transmission and distribution networks, reservoirs, SCADA systems, wastewater treatment facilities, sewerage systems, pumping stations, and fecal sludge treatment infrastructure. • Successful completion of at least two comparable assignments financed by multilateral development partners within the last seven years. • Demonstrated experience in Africa and familiarity with international forms of contract including FIDIC or equivalent. • Demonstrated quality assurance, environmental and social management, and occupational health and safety systems. 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. The attention of interested Consultants is drawn to Section III, paragraphs 3.14, 3.16 and 3.17 of the World Bank’s Procurement Regulations for IPF Borrowers (September 2023) setting forth the World Bank’s policy on conflict of interest. Consultants may associate with other firms to enhance their qualifications but should indicate clearly whether the association is in the form of a Joint Venture and/or a sub-consultancy. In the case of a Joint Venture, all partners shall be jointly and severally liable for the entire contract if selected. The Consultant will be selected in accordance with the Quality and Cost-Based Selection (QCBS) method set out in the World Bank Procurement Regulations. The TOR and further information can be obtained at the address below during office hours: Expressions of interest must be delivered in a written form to the address below (in person, or by mail, or by fax, or by e-mail) by October 15th, 2026. Attention: Mrs. Haddy Njie - Project Coordinator Address: National Water & Electricity Company Limited, Project Implementation Unit Emporium III Building, Fajara 114 Kairaba Avenue Floor/ Room number: Conference Room, 1st Floor City: Banjul Country: The Gambia Telephone: +220 833664125/ 7009342 Electronic mail address: hnjie@nawec.gm, and copy asallah@nawec.gm )

What are the key dates?

Publication
September 14, 2026
Bid Submission Deadline
October 5, 2026
Evaluation & Award
Pending
Contract Signature
Pending

Procuring Entity

Name: NATIONAL WATER AND ELECTRICITY COMPANY
Country: Gambia, The
Contact person: Haddy Njie
Phone: Create a free account to view

Which documents are available?

Tender Details
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