the works aim to improve fish passability in the lower Durance between the Bonpas dam and the confluence with the Rhône by carrying out structural interventions on 3 thresholds located between Avignon and Chateaurenard.

For threshold 67: creation of a 1-metre-deep notch over 180 ml (half the length of the threshold), a macro-roughness ramp.

For threshold 68: creation of a notch 2 meters deep on 180ml (half the length of the threshold), 'A ramp with macro-roughness, a raft reinforcement of the threshold, taken on the steed and the ridge.

For threshold 66: Resumption of bypass river functionality

earthworks: 40,000 m³ of excavated material; Rockrap: 40,000 m³ of riprap to be laid, 22,800 m³ of riprap to be deposited; Sheet piling: 390 ml / 670 tons; Civil engineering of fish passages: 2 ramps of about 3m fall, 20m wide and 60m long, 1200 macro-roughness in fiber-reinforced concrete, 2000 m³ of concrete; The creation of access ramps, construction tracks; The provision of submersible or surface pumps for drilling, the creation of boreholes