Jaz Psie Pole, Hydroengineering dam in Wrocław, Poland.
This water control structure comprises two sections of 38 meters each and uses 632 wooden stakes to manage flow volumes on the Oder, with steel supports enabling manual adjustment of the movable components.
Built from 1892 to 1897, the structure formed part of a waterway management initiative to establish new shipping routes for coal transport and served to modernize the Oder navigation system during the industrialization of Silesia.
This facility embodies late 19th-century engineering practices and applies the Poiree principle from 1834 for water level regulation along this section of the Oder, continuing to serve an active role in controlling river depth between two lock zones.
Steel supports and wooden stakes enable manual operation to regulate water levels between the City Lock upstream and Szczytniki Lock downstream, with a maintenance walkway providing access to operational components for personnel.
This facility is the sole operational kozłowo-iglicowy construction on the Oder and includes a service bridge for maintenance crews, providing access to the manual control elements of the historic structure.
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