Zacisze Barrage is a barrage in Wrocà Âaw, Poland, forming part of the , specifically along its main navigable route through the city, known as the Main Waterway.
This barrage regulates the flow of the Oder, the largest river passing through Wrocà Âaw, across two canals constructed alongside the barrage structures. These canals were developed to enhance flood protection and establish a new fairway tailored to the transportation needs of the time. The barrage includes structures located in the districts of and KowaleâÂÂ. Main hydraulic structures within this barrage include the and the . This barrage, unlike others where hydraulic structures work together to regulate water level, the lock and needle dam there operate independently on separate canals, each controlling the water level only within its respective canal. Currently, only the Zacisze Lock remains in operation; the Zacisze Needle Dam has been dismantled and stored at the canal bottom, taken out of service.
The Zacisze Barrage comprises two primary hydraulic structures, along with associated buildings and auxiliary elements. The main components are:
In addition to these primary structures, auxiliary and supporting elements were constructed, including technical and administrative buildings, the lock control building, and other technical devices and structures.
The current configuration of the Zacisze Barrage resulted from an infrastructure project aimed at constructing a new waterway and enhancing the city's flood protection system, followed by subsequent modernizations and additional constructions. The initial project was carried out between 1913 and 1917. Some original structures have been rebuilt, while others were damaged and dismantled.
During the post-war period in Poland, specific nomenclature was established for the barrage's structures, associated facilities, and canals. The names are derived from the district, located on the southern, left bank of the Flood Relief Canal. The lock and needle dam are named consistently with the barrage: Zacisze Lock and Zacisze Needle Dam.
Wrocà Âaw is situated along a canalized section of the Oder river. The Zacisze Barrage is one of a series of barrages maintaining the required water level on the river:
The navigable route through the Zacisze Barrage is classified as a waterway under relevant legal provisions, specifically the Council of Ministers' regulation on inland waterways, listed in the annex of inland waterways. This is part of the , a component of the international waterway E-30. It serves as the main route for this waterway, with a secondary route passing through the Psie Pole Barrage.
The primary structures of the barrage maintain the designated water level and perform specific functions. The head for the normal pool level is 3.1 m for the lock and 2.3 m for the needle dam, which is currently decommissioned.
Additional and supporting structures within the barrage include: