Ringedals Dam

Ringedals Dam is a gravity dam by Ringedalsvatnet at Tyssedal in Ullensvang Municipality in Vestland county, Norway. The dam was built in stages between 1909 and 1918 in connection with the hydroelectric power plant in Tyssedal and the factories in Odda. When the dam was completed in 1918 it was one of Europe’s largest gravity dams with a reservoir capacity of 222,000,000 cubic metres (180, 000 acre⋅ft). The dam is built in Cyclopean concrete with 30% large-sized stones (plums) and dressed on both sides with approximately 20,000 square metres (220, 000 sq ft) of hand-cut granite stone, the largest of its kind in Norway. The dam is crowned by the date and initials of managing director Ragnvald Blakstad and topped with merlons in Neo-Romanesque style. Ringedalsvatnet is today the reservoir of Oksla Hydroelectric Power Plant at Sørfjorden. The reservoir has a capacity of 426,000,000 cubic metres (345, 000 acre⋅ft) and the power station is every year producing approximately 900 gigawatt-hours (3, 200 TJ).

Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).