Locks: Osowa Góra & Prady were built in 1773–1774 but their present shape was determined during the refurbishment works in 1908–1915, which enabled their elevation up to 3.55 and 3.82 m respectively. They are brick-faced single chamber locks made of concrete. The steel valve sluice gate and the bottom auxiliary sluice gate are manually operated. The vessel lock traversing operation in each of the sluices does not take longer than 20 minutes.
