FISH-PASSING STRUCTURE "CRAYFISH-CATFISH"

Fish-passing structure has placed in chess order with lugs in direction of flow and in rows across flow blocks and through corridors for fish between those. The blocks of neighboring rows in structure form between those, with inclined facets, side fish-passing openings immersed at one level with corridors of previous row. To improve fish-passing properties at low flow level in through corridors neighboring, across flow, blocks and through corridors between those are arranged in width of lugs of the structure. Corridors are arranged in direction of flow as through-opened at the lugs and closed further in flow in same way with blocks of the following row of structure installed lower in lugs. At that the facets of blocks turned to previous lug are made with inclination larger than inclination of facets turned to opposite direction.