The dates of closure for navigation for 2012 are known :

The locks of the lower Rhône, except for Port Saint Louis, will be closed from 11 March at 21.00 to 22 March at 05.00 (10 days), while that of Port Saint Louis will be closed from 21.00 on 25 March to 05.00 on 5 April (10 days).

The locks of the upper Rhône will be closed from 18 March to 30 March (12 days).