Lac de l'Argentella, reservoir in France

Lac de l'Argentella is a masonry dam reservoir on the Ruisseau de Chierchiu in the commune of Galéria, Haute-Corse, at 45 m altitude. The dam is 20 m high and 144 m wide, holding 80,000 m³ over 2.37 hectares. Its curved wall of dark, weathered stone has a walkway of flat light-grey paving on top, with forested mountains behind the water.

The dam was built in the early 1870s for the Argentella lead-silver and copper mines, on the Chierchiu stream south of the mining site. Around 1870 the investor C. Collas had the ore-processing plant and the dam built by the engineers Huet and Geyler. The concession was forfeited on 24 January 1964 and the site abandoned; the dam now belongs to the commune of Calenzana.

The name comes from the Argentella silver and lead mines, worked again from 1846 and equipped around 1870 by investor C. Collas with a processing plant, workers' housing and this dam. A chimney of the ruined buildings still stands near the D81b road, about ten minutes' walk from the lake. The dam now supplies raw water to a few local homes and a summer campsite.

From the D81b coast road between Calvi and Galéria, a dirt track leads to the ruined mine buildings, where a chimney still stands; the dam is about ten minutes further on foot. The mining galleries lie at the foot of Capu di l'Argentella, roughly 40 minutes' walk from the buildings at 813 m. Two tracks, one on each bank of the Chierchiu, also reach the lake.

The dam was built by engineers Huet and Geyler for investor C. Collas around 1870. A 2015 study by the firm SAFEGE weighed destroying, restoring or piercing it with an arch; the arch was chosen first, then reconsidered during the 2017 drought, when farmers asked to use the stored water.