TUNISIA - Heightening and Structural Rehabilitation of the Bou Heurtma Dam

The COBA Group participated in the provisional acceptance visit and the inauguration ceremony of the Bou Heurtma Dam, in the presence of the head of the Ministère de l'Agriculture, des Ressources Hydrauliques et de la Pêche Maritime of Tunisia. Representing COBA were José Cruz Morais and Paulo Soares, while Sónia Pinto represented Tetraplano.

The Bou Heurtma Dam is an earthfill dam with a clay core, located on the Oued Bou Heurtma in Tunisia, approximately 20 km north of the city of Bou Salem. It was built in the 1970's with the purpose of ensuring water supply for irrigation.

The studies conducted by COBA involved the installation of flap gates in the spillway, enabling a 3.5-meter increase of the reservoir’s full storage level and ensuring the regulation of inflow. This intervention resulted in a 23 hm³ increase in storage capacity to meet agricultural demand.

The project also encompassed the rehabilitation of the existing spillway structures and their respective galleries, as well as the study for the installation of a new water intake tower.

During the initial phase of the project, a safety assessment of the dam was conducted, which included analysis and testing campaigns covering geotechnical, structural, and equipment aspects. The subsequent phase focused on raising the spillway and rehabilitating most of the structures integrated into the dam.

During the process, COBA was also requested to redefine SONEDE water supply pipeline.

Lx, 12 June 2024

 

ANGOLA - Inauguration of the Luachimo Hydroelectric Power Plant

On May 17, 2024, the inauguration of the Luachimo Hydroelectric Power Plant took place in the province of Lunda Norte, Angola. The ceremony was presided over by the Minister of Energy and Water, João Baptista Borges, and attended by the governor of the province, Deolinda Vilarinho. COBA was represented by Fernando Prioste, António Pereira da Silva, and Nelson Barros.

It is another hydroelectric project designed by COBA, with a capacity of 34 MW, whose studies and projects began in 2006 with the feasibility study phase. Progress continued with the submission of the tender design in 2014, and the completion of the detailed design and technical assistance to the works, ending in 2024 with the commissioning of the plant.

It is an infrastructure of great importance for the economic and social development of the region, which will allow the regular supply of renewable energy to the city of Dundo and the surrounding area, previously supplied in a precarious manner through diesel generators.

 

 

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The news report from Angolan Television TPA can be watched here.

Lx, 24 May 2024

 

ANGOLA – 2nd Workshop of the Lubango Water Supply Masterplan

The 2nd Workshop of the Lubango Water Supply Masterplan, which is being developed by AdP Internacional and COBA, took place on March 13th.

The event drew a diverse group of participants, including the National Water Directorate (DNA-MINEA), delegates from the Project Coordination Unit (UCP-MINEA), as well as the executive and technical teams of EPASHUÍLA, IRSEA, INRH and GABHIC. Representatives from the Provincial Government of Huíla, along with its Provincial Directors, the Municipal Administration of Lubango, universities, NGOs, and consultants ELECNOR and DAR, also attended. ADP Internacional was represented by its Huila-based team, which included the Team Leader, Project Manager, and members of the Board.

COBA was represented by colleague Tatiana Fonseca.

Lx, 27 Mar 2024

 

LUCAS Future

COBA is currently undertaking the LUCAS Future project for Eurostat.

LUCAS Future is a strategic assessment aimed at shaping the sustainable future of the Land Use and Land Cover Survey (LUCAS), developing scenarios that consider political requirements, data usage, content, frequency, and legal challenges associated with access to private property.

The legal basis for the LUCAS Future project is grounded in the need for compliance with EU policies and regulations governing the collection of statistical data and environmental monitoring.

The project is structured into four main tasks with a total duration of six months, which includes overall and detailed project planning, followed by a comprehensive assessment of the current LUCAS survey methodology, data usage analysis, identification of future user needs, and the development of scenarios for the evolution of the LUCAS survey.

Interviews will be conducted with all key stakeholders from the European Commission (Eurostat, JRC, DG ENV, DG AGRI, DG CLIMA, DG DEFIS, DG SANTE, EEA, and EFSA) to gather diverse perspectives and expertise that can significantly enhance the quality, relevance, and applicability of future LUCAS survey scenarios and ensure alignment with user needs, technological advancements, and policy objectives.

The results will be compiled into a detailed report presenting scenarios, including recommendations for future iterations of the survey, addressing methodological, technological, and legal aspects to ensure the long-term relevance and effectiveness of the survey. These outcomes aim to inform strategic planning processes and policy formulation at the EU level, ensuring that the LUCAS survey continues to provide valuable data for environmental and agricultural management.

The conclusion of the project will culminate in a workshop presenting the results to all key stakeholders.

Lx, 5 Mar 2024

 

PORTUGAL - A1-Lisbon/Porto Motorway

The A1 Motorway (Northern Motorway) is Portugal's longest and oldest motorway. Its length, excluding interchanges with other roads, spans 303 km. For the Concessionaire BRISA, COBA was responsible between 1977 and 1991 for the Studies, Designs and Technical Assistance of approximately 50% of this motorway, including 139 Bridges and Viaducts, 6 Interchanges, and an equal number of Toll Plazas, along with 94 road network re-establishments spread across 6 different sections.

  • Aveiras de Cima-Santarém Basic Design - 1977; Detailed Design - 1980; Technical Assistance - 1989

  • Torres Novas- Fátima Basic Design - 1981; Detailed Design - 1987; Technical Assistance - 1989/91

  • Pombal-Condeixa Basic Design - 1989; Detailed Design - 1989; Technical Assistance - 1991

  • Coimbra-Mealhada Preliminary Study - 1977; Detailed Design - 1980; Technical Assistance - 1989/90

  • Mealhada-Águeda Basic Design - 1980; Detailed Design - 1982; Technical Assistance - 1989/90

  • Aveiro-Vila da Feira Basic Design - 1978; Detailed Design -; Technical Assistance - 1989/90

Of these 6 sections, particular attention was warranted to the Aveiras de Cima - Santarém and Torres Novas - Fátima sections, as the feasibility of their layouts required unconventional solutions. In the case of the first section, the most challenging aspect involved the construction of a viaduct over the Vala da Asseca, followed by the subsequent widening of the road from 2 to 3 lanes.

In the Torres Novas - Fátima section, creating a layout that facilitated the ascent to the Fátima plateau posed a significant challenge. This involved the Arrife crossing and subsequently conducting an open excavation, approximately 30 meters in height.

Due to increased traffic volumes on several sections of this motorway, COBA developed multiple projects to expand road sections from two to three lanes in both directions.

Lx, 2 Feb 2024