Żerań-Zegrze Canal

Autor: mgr inż. Adam Roman Jacewicz    

Żerań-Zegrze Canal

Żerań-Zegrze Canal is an artificial navigational canal joining the Vistula River with Zegrzyński Zalew. It was built during the construction of the dam on Narew River in Dębe and joins the Vistula with the lake. It facilitates the movement of boats, mainly passenger and sport and tourist vessels, from Warsaw to the lake and further down the Narew River right up to Masuria or up the Bug River, and back.

The entry from the Vistula to the Żerań Canal is near the Żerań Heat and Power Plant. At the entry of the canal a navigable lock has been built, making it possible for vessels to overcome the variation in water levels in the Vistula and water in the lake. The level in the lock is always higher than in the river and practically constant, while in the Vistula it is variable and dependent on the size of flow in a given moment. The lock is a solid reinforced concrete structure. Its main elements consist of a lock chamber and upper steel gates from the canal side and lower ones from the Vistula side. When a vessel sails towards the lock from the Vistula, usually the lower gates are open and it can sail into the lock without a hindrance, where it moors. Then the gatekeepers close the lock and fill the chamber with water using special flow tanks. When the water level in the lock is even with the level of the canal the top gates are opened and the vessel sails in the direction of the lake. The lockage procedure downstream is conducted in the same way, except that in reverse order.

The project ‘Protecting the habitats of priority bird species of the Vistula Valley under conditions of intensive pressure of the Warsaw agglomeration’ (wislawarszawska.pl) has received a grant from the Financial Instrument for the Environment (LIFE+) and from the National Fund for Environmental Protection and Water Management.