Midskog hydropower station: repair of a dam from the 1940’s The Midskog hydropower station is part of the river lndal’s water regulation system in Northern Sweden. The dam was built during the 1940’s and is a combined earth fill and concrete dam. The total length of the crest is 1.404 m (4.600’) of which the concrete dam part is 390 m (1.300’). At its maximum height the dam is 27 m (89’) above ground level. The station is owned and operated by Vattenfall (The Swedish State Power Board), the main electrical power- producer in Sweden with some 50 percent of all electricity produced. Average water flow at the Midskog Power Station is 370 m3 per second (785.000cfm) and the turbines have been dimensioned to take 640 m3 per second (1.350.000 cfm). The normal water head is 29 m (

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