Page - 1079 - in Book of Full Papers - Symposium Hydro Engineering

2. JIRKOV DAM DAM Jirkov Dam is located in the North-west part of the Czech Republic. It was constructed between 1960 and 1965. It is a rockfill dam sealed by the impervious clay core. The dam is equipped with the bell-mouth spillway structure at the upstream toe of the dam that is combined with two bottom outlets and three water abstraction intakes at different levels. Water from the bell-mouth spillway and the bottom outlets is conveyed to the outlet tunnel that ends at the downstream toe of the dam. The upper part of the tunnel structure forms an access to the bottom outlets. Perpendicular to the tunnel is the injection gallery that goes along the whole dam at the foundations level. In recent years a grout curtain was constructed from the injection gallery in order to seal the seepage that had been observed. Fig. 1 Cross section of the Jirkov Dam 1079