Kremasta Dam, Embankment dam in Aetolia-Acarnania, Greece

Kremasta Dam is an embankment dam in Aetolia-Acarnania that holds back a large reservoir. The structure consists of compacted earth and rock, creating a substantial barrier across the river valley.

Built between 1961 and 1965, the dam's four 109.3 MW Francis turbine-generators were commissioned between 1966 and 1967. Its reservoir, Lake Kremasta, is the largest artificial lake in Greece. When the lake filled, a 6.3 MW earthquake occurred, attributed to reservoir-induced seismicity.

When Lake Kremasta filled, villages and settlements were submerged, most notably Episkopi in Evrytania. The Episkopi bridge now stands near the site, beside the new village, and links Aetolia-Acarnania with Evrytania. The dam joins the municipalities of Agrinio and Amfilochia on opposite banks of the Achelous.

The dam is accessible by road from the surrounding valley areas, though the site remains somewhat remote. Plan to visit during daylight hours and bring water, as facilities nearby are limited.

Shortly after Lake Kremasta filled, a magnitude 6.3 earthquake struck the dam area, attributed to reservoir-induced seismicity. The case tied the filling of this 4.7-billion-cubic-metre reservoir to seismic study in Greece.