The Fishcon lock was installed in the course of the revitalisation of the Lippenannerl diversion power plant parallel next to the newly built residual water screw turbine and overcomes a height difference of approx. 2 m. The system is operated with an attraction flow rate of 100 l/s, which results in a reduction of more than 50% compared to a conventional slot pass.
In spring and autumn 2019, video monitoring was carried out by the University of Natural Resources and Life Sciences, Vienna to check the fish-ecological function at the site. The Fishcon lock was rated as fully functional with a rating of 1 according to Austrian guidelines.
In addition to the total of 683 fish ascents, 305 fish descents were also documented in the study period of 104 days, despite a poor fish population of around 10 kg/ha in downstream water. The largest migrated fish was a brown trout, 420 mm long. The largest fish when fishing was 370 mm in length. The migration of all fish species identified during fishing and monitoring could be verified.