The test dam in Älvkarleby – what did we learn?

Between 2020 and 2024, a 4-metre-high experimental earth dam was operated in Älvkarleby, forming the basis for several research projects. This synthesis project will now compile and analyse all these research results. The aim is to create an overall picture of what the test dam in Älvkarleby has taught us – and how that knowledge can contribute to safer, more reliable dam technology in the future.

The current synthesis project will compile and analyses all research results from the test pond in order to:

• identify common lessons learned and conclusions from the various sub-projects,

• highlight alternative and complementary interpretations, and

• lay the groundwork for future research and development in the field of soil ponds and monitoring methods.

An independent project group will contribute a senior perspective and critical review.

About the test dam in Älvkarleby

The purpose of the test dam was to create a controlled environment for research into the safety, monitoring and behaviour of earth dams. Several research projects were carried out during the dam’s lifetime.

According to RIDAS (2011), the dam was constructed as a zoned earth embankment with a moraine core, sand and gravel filters, and rockfill shoulders – a design similar to most Swedish hydroelectric dams.