Křižanovice I Reservoir, reservoir in Křižanovice, Czech Republic

Křižanovice I Reservoir is a concrete dam built across the Chrudimka River that creates a water surface covering about 32 hectares. The dam stands roughly 32 meters high and stretches about 130 meters across the valley, holding over 2 million cubic meters of water that flows through a pipeline to power a nearby hydroelectric station.

Built between 1948 and 1954 together with the balancing reservoir Práčov (Křižanovice II), the dam closed the deeply cut valley of the Chrudimka about 3 km northwest of Nasavrky. Its straight concrete gravity dam of plain vibrated concrete has a triangular profile. A branch built as part of the second stage of the Slatiňany-Monaco water treatment plant was commissioned in January 1987.

The dam crest carries the road linking Nasavrky and Křižanovice, so the reservoir is crossed daily by local traffic. Water is drawn by gravity to the Slatiňany-Monaco treatment plant, part of the Chrudim–Pardubice water supply, and during roughly 10 to 20 days of annual conduit maintenance it is pumped from the lower Práčov reservoir instead.

The dam crest carries the road between Nasavrky and Křižanovice, so the crossing can be made on foot or by car. Water is drawn for the Slatiňany-Monaco treatment plant, and for roughly 10 to 20 days a year, during conduit inspections, supply switches to the Práčov balancing reservoir.

Water from the reservoir drops through a 3,139 m long supply conduit, 2.4 m in diameter, to the Práčov hydroelectric plant, where a Francis turbine produces 8 MW. A branch before the plant feeds the Slatiňany-Monaco water treatment works, supplying the Chrudim–Pardubice group water main since January 1987.