Lac de Coiselet
| Lac de Coiselet | |
|---|---|
 | |
| Location | Ain/Jura |
| Coordinates | 46°19′40″N 5°37′00″E / 46.32778°N 5.61667°ECoordinates: 46°19′40″N 5°37′00″E / 46.32778°N 5.61667°E |
| Type | reservoir |
| Primary inflows | Ain, Bienne |
| Basin countries | France |
| Max. length | 6 km |
| Surface area | 3.8 km² |
| Average depth | 9.5 m |
| Max. depth | 30 m |
Lac de Coiselet is a reservoir on the border between the Ain and Jura departments in France. Its surface area is 3.8 km². The lake formed in 1970 after the Barrage de Coiselet was built at the confluence of the Ain and Bienne rivers.