Japan Commission on Large Dams (JCOLD) aims to encourage advances of technologies in planning, design, construction, maintenance and operation of dams and their associated civil works including hydropower facilities. And through its activities, JCOLD aims also contributing to the development of the Japanese economy and the international cooperation.

Recently, JCOLD activities are extended to subjects of current concerns such as dam aging, environmental impact, economic analysis and river basin development and water management.

An important point of JCOLD’s role is to be the contact point for the interchange of information on dams with foreign countries in addition to above-mentioned roles.

JCOLD is providing the information on the advanced technologies and environmental measures on dams and reservoirs in Japan to overseas countries and at same time to introduce the same in foreign countries to Japanese people.

JCOLD is an incorporated association legally registered, and comprises 76 corporate members such as institutions and organizations related to dams, electric power companies, consultant companies, construction companies and so on, as of Apr, 2011.

JCOLD is a member of International Commission on Large Dams since 1931.

Many of Japan’s large dams have stood for nearly sixty years since their construction, and therefore their maintenance and management are important. In the area of sedimentation, the “maintenance and conservation of river environments” was added as an objective under the revised River Act of 1997, and “comprehensive sediment control” is now being promoted as a result. River and river basin environments must be improved. This includes improving the continuity of sediment movement at dam locations. If dams’ sustainability can be enhanced by comprehensive sediment control, a “win-win-win” situation among the environment, flood control, and water utilization will undoubtedly result.

Major earthquakes thought to be highly imminent are also a concern. Most dams were planned and designed in accordance with dam design standards that are based on the pseudo static method. While they are believed to have seismic safety margins, a great deal of research is being on deformation predictions for dam body, foundation rock, and appurtenant structures such as gates in the event of an extreme earthquake. Dams are constantly being monitored using satellites, UAVs, lasers, and microtremor measurement. And steady efforts are continuing to ensure that the effects of displacement before and after earthquakes and changes in vibration characteristics can be confirmed and necessary measures can be taken precisely and swiftly.

Important Dates
Full paper submission deadline
Notification from paper review process
Deadline for presentation submission
Symposium Program

Spanish National Committee on Large Dams (SPANCOLD), Japan Commission on Large Dams (JCOLD), French Committee on Large Dams (CFBR) and Chinese National Committee on Large Dams (CHINCOLD) have the honor to invite professionals to the 9th International Symposium on Roller Compacted Concrete (RCC) Dams and Cemented Material Dams, which will be held in Dec.4th-8th,2023 in Guangzhou City, China.

RCC dams have the virtues of saving a great deal of concrete, building quickly, making project cost down and early bringing into playing project advantages and so on. Hence, the technique of constructing dams has been quickly spread and applied since it came out. Today there are more than 400 RCC dams in more than 40 countries. Great successful experiences and advanced technologies have been achieved. CHINCOLD and SPANCOLD have devoted to promote the technology from early 1990’s. The first Symposium on RCC dams was jointly organized by the two committees in 1991 in Beijing China, which was a success start of the series of RCC Symposiums.

Cemented Material Dam (CMD) is a new type of dams, which includes Hardfill dam, Cemented Sand and Gravel dam (CSG), Cemented Sand, Gravel and Rock dam (CSGR), Rock-filled Concrete dam (RCD), Cemented Soil dam (CSD), and so on. There are more than 200 CMD projects constructed and under construction.

The 9th International Symposium on Roller Compacted Concrete (RCC) Dams and Cemented Material Dams will provide a platform for practitioners, engineers, researchers, scientists, managers and decision makers from all over the world to exchange ideas and technology about the latest developments dealing with RCC dams and CMDs. Beside international best practice, the participants will also have the occasion to visit some famous RCC dams and CMDs in China in operation or under construction.

Dec. 3


Dec. 4

Opening Ceremony, Awarding Ceremony, Symposium

Dec. 5

Symposium, Round Table Forum, Closing Ceremony

Dec. 6-8

Study Tours