Abstract
The Niigataken-Chuetsu Earthquake caused damage three fill-dam reservoirs of the Shinanogawa Hydroelectric Power Plant; this plant is owned by the East Japan Railway Company. Investigations were showed the settlement of the crest of the dam, cracks and sand pumping at the Shin-yamamoto Reservoir, one of the three reservoirs. The core showed no damage, and there was no damage that lost the function of dam. Therefore restoration was enabled despite the severity of the earthquake itself. However, the crest settlement of the dam amounted to as much as 2% of the height of the embankment.
