AFD is currently finalizing the appraisal of a project to build the Sai Luong dam allowing the creation of the Sai Luong Reservoir in Nam Mun Commune in the district of Tuan Giao, which is planned to impound a reservoir of approximately 5.9 million m³, with a catchment area of around 8 km². The dam is designed to create a reservoir that ensures sustainable water supply for the local rural downstream population for both human consumption and for irrigation. The project aims to achieve the recharge of the network heads of several villages in the district corresponding to 10 000 rural households, or 35 000 inhabitants (one third of the population of the district); An irrigation capacity of 17 000 ha of agricultural area on a seasonal basis benefiting about 30 000 farms; and efficient management of the local water supply system. The objectives, to which the project contributes in the area of the Tuan Giao District, are to strengthen the resilience of the province in the face of worsening climate hazards related to climate change, to support its economic and social development, and increase carbon sequestration.
The dam is expected to be an earth dam, approximately 185 m in length, with a maximum height of 37 m, on a rock foundation. The dam will have chimney drainage combined with a rock drainage pile. The crest will be reinforced with M200 concrete. Surface discharge will occur via a longitudinal spillway with adjustable gate thresholds with a designed flood discharge capacity of 57.02 m³/s and a controlled flood discharge capacity of 91.73 m³/s (after regulation). The project will also include installation of a 120 km-long pressure water pipe system, including intermediate storage tanks, a SCADA control system, an intelligent weather station and an irrigation system with humidity sensors.
The objective of the PoE is to provide an independent review of the investigation, design and construction of the dam and the start of operations and recommendations on the required actions to ensure the safety of the dam and associated facilities to acceptable standards as per the World Bank Environmental and Social Framework/Environmental and Social Standard 4/Annex 1 on Dam Safety. Given the size of the Sai Luong dam and the associated risks, the objectives of social and environmental diligences concerning the Sai Luong dam were to conduct a compliance review of the Environmental Impact Assessment carried out, in relation to AFD’s reference standards and in particular the World Bank’s standards. The review by AFD of this compliance review led to an agreement with the authorities in Dien Bien Province on several actions, including the mobilization of a panel of independent experts to analyze the safety of the dam, the dam being considered as a “Large Dam” as defined by international standards (reservoir volume and dam size). The PoE should contain a nucleus of members with expertise in the disciplines required for the project, including (i) a dam specialist in earth dam; (ii) A geologist or geotechnical specialist, (iii) A hydrologist and (iv) A seismologist as well as depending on the nature and risk of the dam, the employment on a part-time basis of a hydraulic engineer, an electromechanical expert and a “generalist” civil engineer. At least one of the experts must be of Vietnamese nationality.
The required expertise is globally estimated at 80 men days, with three missions on site, one for each phase. The first mission could be in February or early March 2025. The second and third mission could be in 2026/2027 and 2029. The study will require three expert visits to the Tuan Giao District, including carrying out the study, restitution of the work to the various stakeholders.
The Province of Dien Bien will be the final beneficiary of the AFD financing, and the Tuan Giao People’s Committee will be the project owner, through a project management unit (PMU). The coordination of project activities will be carried out by this PMU which will ensure the management, implementation and monitoring of the project. It will be responsible for selecting all contractors and construction companies that will be mobilized for the implementation of the project. The PMU will be assisted by the technical assistance selected through an international call for tenders by the province.
The procurement notice with a letter of invitation and tender documentation, including terms of reference, can be viewed at: https://afd.dgmarket.com/tender/89082045.
Offers written in English (or French), must be received by 17.00 Hanoi time on 24 January 2025 by e-mail (using the standard Microsoft Office or equivalent versions) at nguyenta@afd.fr; vasseurd@afd.fr and nguyennhv@afd.fr. For further information, contact: Denis Vasseur, Task Team Leader, Agence AFD de Hanoi, 28 Thanh Nien, Ha Noi, Viêt Nam; Tel.: +84 24 38 23 67 64; E-mail: vasseurd@afd.fr.
