Sysen Dam

The Sysen Dam (Norwegian: Sysendammen) is a rock-fill embankment dam in the municipality of Eidfjord in Hordaland, Norway. The dam is 1,157 meters (3,796 ft) long, 81 meters (266 ft) high, and 258 meters (846 ft) wide at its base. It is built of 3.6 million cubic meters (130×10^⁶ cu ft) of stone and moraine deposits.^[1][2]

Sysen Dam
The Sysen Dam
Location	Eidfjord, Norway
Coordinates	60.4046°N 7.3838°E / 60.4046; 7.3838
Opening date	1980
Dam and spillways
Type of dam	Gravity dam
Height	81 meters (266 ft)
Length	1,157 meters (3,796 ft)
Width (base)	248 meters (814 ft)
Reservoir
Total capacity	427 million cubic meters (15,100×10^6 cu ft)

The dam holds back Lake Sysen, which is the main reservoir for the Sy-Sima Hydroelectric Power Station. The average annual production of the power station is 1,115 GWh.^[3] The reservoir capacity is 427 million cubic meters (15,100×10^⁶ cu ft) and it is regulated at an elevation of 66 meters (217 ft).^[1][2]

The water supply to Vøring Falls is regulated by the dam, and there is a requirement for minimum water supply during the summer season.

The dam is a tourist attraction,^[4][5] and it can be accessed from Norwegian National Road 7.^[1]