Tender Description
TENDER TITLE: RE TENDER FOR A WORKS CONTRACT FOR THE REFURBISHMENT & UPGRADING OF THE MAMBO WASTEWATER TREATMENT PLANT
1. Sealed Tender offers are invited to tender for Re Tender for A Works Contract for the Refurbishment & Upgrading of the Mambo Wastewater Treatment Plant. The Works comprise the assessment, investigation, design, rehabilitation, upgrading, construction, supply, installation, testing, commissioning and performance testing of the Mambo Wastewater Treatment Plant and associated wastewater infrastructure. The existing Mambo Wastewater Treatment Plant has a nominal treatment capacity of approximately 15 ML/day. The objective of the Project is to rehabilitate the existing plant and integrate additional treatment infrastructure to provide a reliable overall treatment capacity of 30 ML/day. Effluent quality shall be BOS 93:2012 standard.
The Works shall include, but shall not be limited to:
i. Rehabilitation and refurbishment of the existing 15 ML/day treatment facilities.
ii. Construction of additional treatment facilities to provide the additional 15 ML/day capacity.
iii. Integration of the existing and new facilities into a single 30 ML/day treatment system.
iv. Upgrading of mechanical, electrical, instrumentation, automation, telemetry and SCADA systems.
v. Upgrading of sludge handling, thickening, digestion and biogas facilities.
vi. Upgrading of disinfection facilities.
vii. Rehabilitation of the associated twenty-eight (28) wastewater pumping stations.
viii. Rehabilitation and remedial works to the wastewater collection and outfall systems.
ix. Design, Construction and commissioning of associated pumping and transmission infrastructure for the Francistown Wastewater pond system.
x. Rehabilitation of the Francistown Wastewater pond system.
xi. Provision of standby power, Access control & monitoring security system, lighting, Fire detection system, roads, buildings and other supporting infrastructure.
xii. Design, supply & installation of SCADA, Telemetry, Automation and Control System as an integrated system covering the Mambo Wastewater Treatment Plant and all twenty-
eight (28) wastewater pumping stations, with provision for centralised monitoring and control, automated process control, remote alarm notification, historical data storage, trending, reporting and future expansion. The Contractor shall be responsible for the complete end-to-end system, including all field instrumentation, PLCs/RTUs, control panels, communication networks, software, servers, operator workstations, cybersecurity, UPS/backup power, configuration, integration, testing, commissioning, training and handover documentation xiii. Effluent Water Quality Effluent shall comply with BOS 93: 2012 standard for discharge of effluent into watercourses.
2. Procurement Method is: OPEN DOMESTIC BIDDING
3. Local Contractors must be registered with the Public Procurement Regulatory Authority (PPRA) in the following categories: Main Contractor must be domiciled in Botswana
Code 05 – Water and Sewage Treatment Plant Works
Sub-Code 01 – Water and Sewage Treatment Plants Grade E.
Joint Ventures
I. Where the Tenderer is a Joint Venture (JV), the JV shall collectively satisfy the eligibility requirements for the main Works and shall comply with all applicable PPRA and Citizen Economic Empowerment Policy (CEEP) requirements.
II. The lead/main JV partner shall be registered with PPRA under Code 05 – Water and
Sewage Treatment Plant Works, Sub-Code 01 – Water and Sewage Treatment Plants,
Grade E. Each JV partner shall be registered with PPRA in the applicable category, sub-code and grade relevant to the portion of the Works for which it is responsible.
III. Tenderers that are Non-Citizen Owned entities are notified that in line with Citizen Economic Empowerment Policy (CEEP), there shall be mandatory Joint Venture with 100% Citizen Owned Contractor(s) / Consultant(s) who shall undertake a minimum of 40% of the total contract value (inclusive of contingency and VAT) as a fully bona fide domestic Joint Venture member.
IV. A 100% Citizen-Owned company that independently satisfies all the eligibility requirements may submit a Tender as a sole Tenderer without forming a JV with a non-citizen owned company
In addition, the main contractor’s associates, or his sub-contractors must be domiciled in Botswana and registered under PPRA in the following categories:
Design Sub-Consultants
The Design Consultants shall be registered with PPRA under the following codes:
i. Code 303 – Civil Engineering Services, Sub-Code 08 – Irrigation, Water Supply and Sanitation/Sewerage
ii. Code 304 – Electrical Engineering Services, Sub-Code 01 – Electrical Design General;
iii. Code 305 – Mechanical Engineering Services, Sub-Code 01 – Mechanical Design
General;
iv. Code 319 – ICT Consultancy Services, Sub-Code 01 – ICT System Development,
Sub- Code 02 – Network Facilities Management ICT, and Sub-Code 05 – Telecommunications.
Subcontractors
i. Electrical, Automation, Security and Telemetry Works
Code 02 – Electrical Engineering Works and Maintenance, including:
Sub-Code 01 – Electrical Installations (Grade E);
Sub-Code 04 – Automated Machinery and Control Systems (Grade E);
Sub-Code 07 – Security Systems Installations (CCTV, Access Control, Alarms, etc.) (Grade E);
and Sub-Code 08 – Radio/Telemetry (Grade E).
ii. Mechanical Works Code 08 – Mechanical Engineering Works and Maintenance,
Sub-Code 11 – Pumps (Grade E)
iii. Civil/Water Works Code 03 – Civil Engineering
Sub-Code 06 – Water Supplies, Sanitation, Reticulation and Irrigation Works (Grade E).
4. Interested bidders should not be serving as Public Officers or be immediate family members of Public officers employed by the procuring entity (Water Utilities Corporation) as per section 111 subsection (1 and 3) of the Public Procurement Act 2021.
5. Contact Persons: Senior Manager Supply Chain Contact: Z Mmolawa Email: procurement@wuc.bw
6. Tender documents shall be obtained by visiting web address https://www.wuc.bw/ wuc-tenders-new . Documents will be available for purchase from 16 September 2026.
7. Bidders who previously purchased Tender WUC 029 (2026), A Works Contract for the Refurbishment & Upgrading of the Mambo Wastewater Treatment Plant will receive the Tender Document at no cost.
8. A non-refundable amount of P10 000.00 is payable to Water Utilities Corporation; payments should be made on the website. Youth (18 – 35) owned Companies shall pay half price. Bidders are to process payment on the website.
9. A compulsory site visit meeting with representatives of the Procuring Entity will take place at Mambo Wastewater Treatment Plant in Francistown on the 24 and 25 September 2026 starting at 09:00 hrs. Bidders must arrive on or before 09:00 hrs and attend the site visit on both days.
Directions: From Gaborone on A1 Turn Right at the Former BMC Circle Traffic Lights (the first traffic lights into Francistown) into Kazungula road. Drive straight and turn right at Kazungula Marang road junction. Drive straight until you reach the end of the tarred road. Mambo plant will be on the left.
Location coordinates: 21°13′08.42″S, 27°32′08.75″E
10. Queries relating to this tender should be addressed to the Senior Manager-Supply Chain at procurement@wuc.bw and should reach the office not later than ten (10) days before the tender closing date.
11. The closing date and time for receipt of sealed tender offers is 1000hrs on 22 October 2026.
12. Late tender offers will not be accepted.
13. The Bid Submission Method is: Two Envelope Submission Method, One sealed envelope for Technical Offer and the other sealed envelope for Financial Offer, both placed in one single sealed envelope and clearly marked
“Re Tender for A Works Contract for the Refurbishment & Upgrading of the Mambo Wastewater Treatment Plant”.
Bids shall be delivered to:
The Senior Manager: Supply Chain, Tender Room, Water
Utilities Corporation, Sedibeng House, Plot 17530, Luthuli Road, Old Industrial Site,
Gaborone, Botswana
The name and address of the bidder should be clearly marked on the envelope.
The Public Procurement Regulatory Authority Standardized Conditions of Tender for Works shall apply to this procurement, for which all the applicable Tender Data is contained in the tender documents.
