|Coordinates||663 091 / 155127|
|Data on the structure|
|Lock type:||Gravity dam|
|Height of the barrier structure :||100 m|
|Height above the river bed :||90 m|
|Building volume:||453,000 m³|
|Crown length:||526 m|
|Operator:||Kraftwerke Oberhasli AG, Innertkirchen|
|Data on the reservoir|
|Altitude (at congestion destination )||2303 m above sea level M.|
|Water surface||1.46 km²|
|Reservoir length||2.8 km|
|Maximum depth||90 m|
|Catchment area||19.4 km²|
|Design flood :||21 m³ / s|
The Oberaarsee is the highest reservoir in the headwaters of the Aare in the canton of Bern ( Guttannen municipality ). It is located below the Oberaar Glacier . It is followed by the Aare reservoirs Grimselsee and Räterichsbodensee , two more of several reservoirs that feed the hydropower plants of Kraftwerke Oberhasli AG.
The lake can be reached with vehicles from the Grimsel Pass on a one-way street (change of direction every half hour), from which the Unteraar Glacier and the Grimselsee can be clearly seen. A power station's own cable car also leads to the dam in winter.
The construction of the dam lasted until 1953.
The lake has a storage volume of 65 million m³.
Commons : Oberaarsee - collection of images, videos and audio files