Technical engineering studies, economic, environmental, social and road safety studies for the rehabilitation and paving of the Adjaha-Athieme road, spurs included (70 km)
Country
BeninName of Client
Secrétariat annexe de la Personne Responsable des Marchés Publics (PRMP)Financing sources
BADAssociation
ETRICO Ingénieurs Conseil (member)Duration
03/2020 - 09/2021Project Description
The development of this road section was identified during the development of the multinational Benin / Togo project for the rehabilitation of the Lomé-Cotonou road in July 2014.
The rehabilitation of the Adjaha-Athiémé road (40 km) and its spurs (37 km) will allow to:
- opening up productive areas and developing the resources produced in these areas, factors that will increase the income of rural populations;
- improve accessibility to social infrastructure : the opening up of a rural area makes it easier, faster and cheaper for people to reach the municipality's social services: 1) school, 2) high school, 3) dispensary, 4) hospital, 5) town hall services (indicator: population with access to social infrastructure) ;
- it also aims at reducing insecurity between the major cities of Benin and, also, improving the flow of traffic between Lagos and Abidjan.
The study also provides for an assessment of road safety on all the axes studied, with the location of black spots, an analysis of road accident data and the implementation of measures to improve safety. Specific surveys were carried out with users and with local authorities
Road project geometry:
- Total road length: 40 km
- Carriageway width: 2 m
- Shoulders width: 5 m
Road quantities:
- Sub-base : 750 000 m3
- Base course : 120 000 m3
- Roadway paving 90 000 m3
- Shoulders paving BB, 5cm
Structures:
- Culverts (box/pipe): 500 m
- Bridges (number/length): 4 (25/30 m)
Spurs geometry:
- Total length: 8 km
- Carriageway width: 6 m
- Earthworks 200 000 m3
- Wearing course : 50 000 m3
Structures:
- Culverts (box/pipe): 250 m
Services Description
PHASE 1 - FEASIBILITY STUDY : Inception report – Feasibility report
Collection of existing data, visual inspection, inventory
Study of route variants and evaluation of major constraints
Summary geotechnical, hydrological, hydraulic studies
Assess environmental issues
Summary cost estimate
Multi-criteria analysis
Processing of technical dossier
Economic study and HDMIV analysis
PHASE 2 – PRELIMINARY DESIGN STUDY : Preliminary Design Report
Study of the layout and layout of the base polygonal
Geotechnical study: Road axis, building materials, foundations
Hydrological and hydraulic study
Structural and drainage study
Road safety study
Bill of quantity and cost estimate
PHASE 3 – ENVIRONMENTAL, SOCIAL AND ROAD SAFETY STUDY : Social Environmental Study and Safety Report
Project description - Identify the political, legal administrative framework - Define the project study area
Analyze the conditions of the physical, biological and human environments of the study area
Analyze the solutions of the proposed project from an environmental standpoint. Evaluate the importance of potential negative and positive environmental and social impacts, direct and indirect, short and long term of actions to limit it
Conduct consultations with primary and secondary stakeholders during and after the preparation of the preliminary ESIA report
Define the appropriate mitigation and improvement measures, including the responsibilities and associated costs in collaboration with the CNSR of Benin
Develop an environmental and social monitoring and surveillance program
Prepare an Environmental and Social Management Plan (ESMP)
Prepare a Resettlement Action Plan
PHASE 4 – DETAILED ENGINEERING STUDIES : Final Design Report (APD)
Topographical study: Detailed surveys
Geological and geotechnical study: Study of support soil, building materials, etc.
Pavement design
Hydrological and hydraulic study : structural and drainage study
Signalling and road safety study
Detailed confidential Bill of quantity and cost estimate
PHASE 5 – TENDER DOSSIER : Elaboration of the Tender Dossier
