On Monday, October 29, 2018, for the first time, water flowed through the new clay fish passage in the wet nature area Nieuw Stroomland near industrial area Zwette VI. Daily board member Egbert Berenst of Wetterskip Fryslân has opened the fish passage. The fish passage consists of clay from the area, mixed with lime and recycled toilet paper. A unique, innovative and sustainably landscaped fish passage of more than 100 meters. Makan has shaped the concept using the clay patterns of the rifts which the Middelzee has created here in the past. Thanks to a fish passage, fish can swim to higher water more easily.