The Seitevare dam is located on the Lilla Luleälven River in the northern part of Sweden, and owned by Vattenfall. With a length of ca. 1.5 km and more than 100 m high Seitevare is among the largest dams in Sweden. Fibre optic cables were installed along the toe in 2004 for seepage measurements based on temperature. Fibres were also installed in the crest for strain measurements one year later. After several years with repeated and long term measurements, permanent monitoring started in 2016.