This dam ensures that the lake Ørfiske drains to Oslo, and not to Nittedal, which it did originally. Before the dam, there was two Ørfiske-lakes, at 335 and 332 m-asl. The Greveveien passed between the two lakes, on its way from Hakadal Verk to Maridalshammeren.
The decision to dam up the lakes and to transfer the water to Maridalsvassdraget, was made by royal decree (kongelig resolusjon) of 26th of January 1901. The grounds for the decision was the need to secure the water supply for the city of Kristiania. It gave rise to a dispute between Nittedal and Kristiania on the lawfullness of transferring water from one water system to another. Nittedal submitted that the dam would give far more water than Kristiania could ever need in forseeable future, and that the reel purpose was to supply the industry along the Akerselven with water power. The dispute was finally decided upon by the Supreme Court. The Court declared the royal decree to be lawful. The Court's judgment was made on May 23rd 1906. This cache is a 100-year memorial for the judgment, which indirectly has contributed to the forming of the cultural landscape in this part of Nordmarka.
The cache is placed on the westside of the river, below the dam. All year available.
Original contents: Log/infosheet Pencil-/sharpner Two metal buttons Holmenkollpin Holmenkollski Dice Coin - NOK 1 (1956) Coin - NOK 0.25 (1962) Strap to hang a GPSr around the neck or some other purpose