While waiting for Mälarenergi's decision as to whether or not the dam should be rebuilt in modern bottling, the biologists at the County Administrative Board can begin to examine the newly formed stream.

- It will be incredibly interesting to follow this development and see which species can find their way back, says Viktor Kärvinge.

Dust became current

What was only a few months ago an elongated, lake-like pond above the power plant, now houses a stream that sometimes rushes, sometimes meanders in the valley.

- It was more or less an artificial lake here before, but now with the lowered dam we suddenly have a rapid where we used to have calm water, says Viktor Kärvinge.

Follow along down to the stream that has re-emerged

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Come along to Hedströmmen's newly formed stream.

Where Viktor Kärvinge, water manager of the Västmanland County Administrative Board, hopes that mussels, fish and insects will thrive.

Photo: Fredrik Björkholm/SVT