News & Update
Awarded Contract for Detailed Design and Other Consulting Services for the "Koh Khsach Tonlea Bridge" Construction Project in the Kingdom of Cambodia
Chodai Co., Ltd. has successfully secured the contract as the sole consultant by the Ministry of Public Works and Transport (MPWT) of the Kingdom of Cambodia to provide consulting services for the Feasibility Study (FS), Detailed Engineering Design (DD), and Construction Supervision (CS) of the "Construction of Koh Khsach Tonlea Bridge Project (KTB) *1", which is funded by the European Investment Bank (EIB).
Conceptual rendering of the completed bridge (Source: Chodai)
A contract signing ceremony was held on May 8, 2026 (Attended by the Minister of MPWT, MPWT officials, and our company's delegation)
Koh Khsach Tonlea is a river island formed by the Bassac River in Saang District, Kandal Province, located approximately 30 km south of Cambodia's capital, Phnom Penh (population approx. 2.4 million). It is a major agricultural production area for the country. However, there is currently no bridge connecting the island to the opposite shore, making transportation and logistics entirely dependent on ferries. Constraints related to weather and operating hours have become significant obstacles to the region's economic development.
To improve this situation, the Cambodian government planned this bridge construction project (total project cost of approximately JPY 3 billion, supported by the EIB) to connect Koh Khsach Tonlea with National Road No. 21, as part of the country's ASPIRE-AT program *2. Once the bridge is completed, it will enable the rapid supply of fresh produce to the Phnom Penh market, and the island is expected to develop into a major agricultural hub.
This project encompasses the construction of a bridge crossing the Bassac River and its approach roads. Currently, a Prestressed Concrete (PC) box girder bridge with a span of approximately 100 meters is planned. During the planning and design phases, we aim to deliver a bridge that ensures safe navigation for passing vessels while allowing smooth transit for large vehicles used for agricultural transport. Furthermore, we will formulate an optimal bridge plan that carefully considers and reflects the unique local natural environment and the characteristics of the Bassac River, which experiences annual water level fluctuations exceeding 5 meters, riverbank erosion, and scouring.
Throughout this project, Chodai will provide comprehensive support for the bridge's construction from the FS to the CS stages, while also actively engaging in technology transfer to Cambodian engineers. The project duration is 45 months from commencement (FS/DD: 15 months, CS: 30 months).
Chodai has accumulated valuable experience and expertise in bridge construction in Cambodia, most notably through the "Tsubasa Bridge" (opened in 2015, funded by JICA Grant Aid) located on the Southern Economic Corridor (National Road No. 1). By leveraging the technological capabilities we have acquired through our extensive track record, we are committed to the successful delivery of this project, contributing to the facilitation of logistics and the regional economic development of Cambodia.
■Notes
※1 Official Contract Name：Consulting Services for Feasibility Study, Detailed Engineering Design, and Construction Supervision of Koh Khsach Tonlea Bridge Project; KTB
※2 Fund Description：The Government of the Kingdom of Cambodia has received financing from the International Fund for Agricultural Development (IFAD) and the European Investment Bank (EIB) in form of loans and a grant from the European Union (EU) to implement the Agriculture Services Programme for an Inclusive Rural Economy and Agricultural Trade (ASPIRE-AT).
■Related Sites
Cambodia Construction & Property News：Cambodia and Japan Sign Consultancy Agreement for Koh Ksach Tonlea Bridge Project in Kandal Province - Construction & Property News
■Contact Information for Inquiries
Structural Engineering Division,
International Infrastructure Engineering Department,
Structural Engineering H.Q.
Chodai Co., Ltd.
email：info-itn@chodai.co.jp