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The THE WORLD BANK GROUP has issued a Tender notice for the procurement of a Development of a Dam Safety and Contingency Plans for the Boali Dams in the Central African Republic. This Tender notice was published on 16 Dec 2020 and is scheduled to close on 28 Dec 2020, with an estimated Tender value of Refer Document. Interested bidders can access detailed Tender information, eligibility criteria, and complete bidding documents by referencing TOT Ref No. 48518986, while the tender notice number is 1271887 and Registering on the platform.
Procurement Summary
Country: Central African Republic
Summary: Development of a Dam Safety and Contingency Plans for the Boali Dams
Deadline: 28 Dec 2020
Posting Date: 16 Dec 2020
Other Information
Notice Type: Tender
TOT Ref.No.: 48518986
Document Ref. No.: 1271887
Financier: World Bank (WB)
Purchaser Ownership: -
Tender Value: Refer Document
Purchaser's Detail
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Login to see detailsTender Details
Expression of Interest are invited for Development of a Dam Safety and Contingency Plans for the Boali Dams in Central African Republic.
REQUEST FOR EXPRESSION OF INTEREST FOR SELECTION # 1271887
This Request for Expression of Interest is for a Firm Selection. Please log in as a valid Firm User if you wish to express interest in this selection.
Selection Information
Assignment Title
Development of a dam safety and contingency plans for the Boali Dams in Central African Republic
Publication Date
14-Dec-2020
Expression of Interest Deadline
28-Dec-2020 at 11:59:59 PM (Eastern Time - Washington D.C.)
Language of Notice
English
Selection Notice
Assignment Country
· CF - Central African Republic
Funding Sources
The World Bank Group intends to finance the assignment/services under:
· TF0B3898 - Improving Infrastructure-based Service Delivery in CAR
· BB - BANK BUDGET
Individual/Firm
The consultant will be a firm.
Assignment Description
SELECTION FOR CONSULTANTS BY THE WORLD BANK GROUP
REQUEST FOR EXPRESSIONS OF INTEREST
Electronic Submissions through World Bank Group eConsultant2
https://wbgeconsult2.worldbank.org/wbgec/index.html
ASSIGNMENT OVERVIEW
Assignment Title: 1271887 - Development of a dam safety and contingency plans for the Boali Dam in Central African Republic
Assignment Countries:
- Central African Republic
ASSIGNMENT DESCRIPTION
This document presents the term of reference for the development of a contingency plan for the Boali dam operated by the national electricity company ENERCA. The contingency plan includes the dam-break study, which was the main topic of a previous study completed under the Water and Electricity Upgrading Project (PASEEL) financed by the World Bank.
ENERCA manages three cascading hydroelectric power plants on the MBali River: Boali 1 and 2, which are instream structures, and Boali 3, which is a regulating dam. These power plants require rehabilitation and maintenance work, particularly for civil engineering and hydromechanical equipment.
At present, there is no contingency plan for the Boali dam and previous studies have indicated that the safety level of some structures is low. Following the definition of a framework, this document details the services required to develop a correct contingency plan for the Boali 3 dam. It will include a dam-break study, the implementation of an alarm system, and a contingency response strategy.
FUNDING SOURCE
The World Bank Group intends to finance the assignment / services described below under the following:
- Improving Infrastructure-based Service Delivery in CAR
ELIGIBILITY
Eligibility restrictions apply: n.a.
INDIVIDUAL / FIRM PROFILE
The consultant will be a firm.
SUBMISSION REQUIREMENTS
The World Bank Group now invites eligible firms to indicate their interest in providing the services. Interested firms must provide information indicating that they are qualified to perform the services (brochures, description of similar assignments, experience in similar conditions, availability of appropriate skills among staff, etc. for firms; CV and cover letter for individuals). Please note that the total size of all attachments should be less than 5MB. Consultants may associate to enhance their qualifications.
Interested firms are hereby invited to submit expressions of interest.
Expressions of Interest should be submitted, in English, electronically through World Bank Group eConsultant2 (https://wbgeconsult2.worldbank.org/wbgec/index.html)
NOTES
Following this invitation for Expression of Interest, a shortlist of qualified firms will be formally invited to submit proposals. Shortlisting and selection will be subject to the availability of funding.
Only those firms which have been shortlisted will receive notification. No debrief will be provided to firms which have not been shortlisted.
Attachments
· Optional TOR File
Qualification Criteria
· 1. Provide information showing that they are qualified in the field of the assignment. *
· 2. Provide information on the technical and managerial capabilities of the firm. *
· 3. Provide information on their core business and years in business. *
· 4. Provide information on the qualifications of key staff. *
· 5. Provide information on the key staff`s proficiency in French.
Terms of Reference for Contingency Planning
Development of a dam safety and contingency plans for the Boali 1, 2, and 3 power plants
Contents
1. INTRODUCTION 1
1.1. BACKGROUND 1
1.2. CLIENT ORGANIZATION 1
1.3. DESCRIPTION OF THE PROJECT AND STUDY AREA 1
1.4. APPLICABLE FRAMEWORK AND STANDARDS 4
2. DESCRIPTION OF WORK ACTIVITIES 5
2.1. OBJECTIVES 5
2.2. LIDAR SURVEYS 6
2.2.1 METHOD 6
2.2.2 EXPECTED CHARACTERISTICS 6
2.2.3 QUALIFICATIONS REQUIRED 7
2.2.4 MATERIALS AND ACTIVITIES TO BE INCLUDED IN THE SERVICE 8
2.3. TOPO-BATHYMETRIC SURVEY 8
2.3.1 THE MULTIBEAM METHOD 8
2.3.2 TYPE OF BOAT TO BE USED 9
2.3.3 ACQUISITION OF BATHYMETRIC AND TOPOGRAPHIC DATA 9
2.3.4 UNIT OF MEASUREMENT AND GEODETIC PARAMETERS 10
2.3.5 DATA PROCESSING AND VISUALIZATION 10
2.3.6 ASSISTANCE FROM THE CLIENT 10
2.4. DAM-BREAK STUDY AND FLOOD MAPS 11
2.4.1 DAM-BREAK MECHANISMS 11
2.4.2 REQUIREMENTS FOR A HYDROGRAPH 11
2.4.3 SIMULATION OF FLOOD WAVE PROPAGATION 13
2.4.4 PRODUCTION OF FLOOD FIELD MAPS 13
2.4.5 DAMAGE ASSESSMENT 13
2.4.6 SOFTWARE TO USE 14
2.5. ANALYSIS OF HAZARDS 14
2.6. CONTINGENCY STRATEGY AND ORGANIZATION IN CHARGE 14
2.7. TRAINING 15
3. BASIC DOCUMENTATION AVAILABLE 16
4. CONDUCT OF THE STUDY 17
4.1. FIELD VISIT 17
4.2. TEAM 17
4.2.1 TOPOGRAPHY 17
4.2.2 CONTINGENCY PLANNING 17
4.3. DELIVERABLES 18
4.5. PLANNING AND DEADLINES 20
5. REFERENCES 22
List of figures
Figure 1 - Downstream view of the M`Bali dam, with the concrete part of the structure in the centre and riprap shoulders on either side. 2
Figure 2: Area to be covered by the LIDAR readings 7
Figure 3 Principle of operation of the multibeam echosounder [2]. The reading can be done from another type of boat. 8
Figure 4 Potential dam-break in view of the main phenomenon of internal erosion [4]. 12
1. Introduction
This report presents the terms of reference for the development of a contingency plan for the Boali dam operated by the national electricity company ENERCA. The contingency plan includes the dam-break study, which was the main topic of a previous study completed under the Water and Electricity Upgrading Project (PASEEL) financed by the World Bank.
ENERCA manages three cascading hydroelectric power plants on the M-Bali River: Boali 1 and 2, which are instream structures, and Boali 3, which is a regulating dam. These power plants require rehabilitation and maintenance work, particularly for civil engineering and hydromechanical equipment.
At present, there is no contingency plan for the Boali dam and previous studies have indicated that the safety level of some structures is low. Following the definition of a framework, this document details the services required to develop a correct contingency plan for the Boali 3 dam. It will include a dam-break study, the implementation of an alarm system, and a contingency response strategy.
1.1. Background
The Boali Hydroelectric Power Plant project dates back to the end of the Second World War. The preliminary project study had been developed by Electricité de France (IGUFE) from 1947 onwards. The inauguration ceremony took place on September 1, 1991. The World Bank is currently supporting the Government of the Central African Republic in the electricity sector to help ENERCA to:
Rehabilitate its electricity generation, transmission, and distribution infrastructure; and
Improve its commercial and financial management to improve service quality.
1.2. Client Organization
The Coordination of the Transport and Transit Facilitation Project in the CEMAC zone— Central African Component—required the development of a dam safety plan and contingency plans for the Boali 1, 2, and 3 power stations, within the framework of the Water and Electricity Upgrading Project (Projet d-Amélioration des Services de l-Eau et de l-Électricité (PASEEL)). The Project Management Unit (PMU), within the framework of a World Bank financing, is requesting a thorough analysis of dam-break, which is part of the hydroelectric cascade on the M`Bali river, operated by the national company ENERCA. At the request of ENERCA, the work was extended to include the development of a comprehensive contingency plan.
1.3. Description of the project and study area
The M-Bali watershed covers 4, 560 km2 and is one of the main tributaries on the right bank of the Oubangui River, which flows through the capital Bangui. The nearest town is Boali, on the RN1 highway. The dam is located about 85 km northwest of the capital Bangui and upstream of two other instream hydroelectric plants: Boali 1 (8.75 MW) and Boali 2 (9.90 MW). These plants supply Bangui, but require immediate renovation to allow them to operate at full capacity following the damage caused by the civil war and to extend their lifespan [1].
The M`Bali dam forms a reservoir at the normal reservoir elevation (572 m) of 250 hm3 and a surface area of 31 km2. It is a gravity dam with incorporated hydroelectric plant. It incorporates two vertical axis Kaplan units with an installed capacity of 6 MW each. There are two rock-filled dikes on the right and left banks, against the concrete structure (Figure 1).
Figure 1 - Downstream view of the M`Bali dam, with the concrete part of the structure in the middle and riprap shoulders on either side.
Below is a list of the main technical features:
Dam
Type Mixed concrete/fill work (earth and riprap), with concrete center block,
Concrete part 5
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