Ill (Vorarlberg)

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The Ill near Feldkirch-Gisingen.
The Ill near Feldkirch-Gisingen.
Physical characteristics
 ⁃ coordinates46°52′9″N 10°6′32″E / 46.86917°N 10.10889°E / 46.86917; 10.10889 (Ill source)
 ⁃ elevation2,240 m (7,350 ft)
 ⁃ coordinates
47°17′57″N 9°33′31″E / 47.29917°N 9.55861°E / 47.29917; 9.55861 (Ill mouth)Coordinates: 47°17′57″N 9°33′31″E / 47.29917°N 9.55861°E / 47.29917; 9.55861 (Ill mouth)
 ⁃ elevation
1,811 m (5,942 ft)
Length72 km (45 mi)
Basin features
ProgressionRhineNorth Sea

The Ill (all capitals: ILL) is a 72 km long tributary of the Rhine in the western Austrian province of Vorarlberg.

It flows from the northern slopes of the Silvretta mountain range and then runs north-west through Vorarlberg. The Ill passes through the Montafon and Walgau valleys and the town Feldkirch. It joins the river Rhine a few kilometers northwest of Feldkirch ("Illspitz"), at the border with Switzerland. The Ill has several dams with hydroelectric power stations.