The Granetalsperre, built in 1969, is the youngest of the Harz dams and was built in the Granetal. Since the river Grane itself did not carry enough water for the 3 km long lake, an approx. 7.4 km long tunnel to the Oker was created below the Oker dam. This also takes in water from the Gose on the way. Another 4.8 km long tunnel leads from the Radau to the Großer Romke and thus also into the Oker-Grane tunnel. There is also an underground connection to the Innerste Reservoir.
January 7, 2021
An overview of all (regular) 222 stamping points for the "Harzer hiking pin", which is popular with many, can be found on the following website:
November 24, 2021
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