Aire And Calder Navigation Birkwood Lock At Se 359 240

Birkwood Lock is a lock on the Calder Cut of the Aire and Calder Navigation, opened in 1839. It was designed by the engineers George Leather and Son of Leeds. The lock is constructed from large dressed blocks of sandstone, with some concrete repairs, and features wooden gates. It has quadrantally curved entrances at each end, along with upper and lower gates, as well as intermediate gates that were manually operated until the 1960s and are now operated hydraulically by electric power. There is an overflow sluice located at the north-west corner. A modern control cabin and bridge are present but are not included in this listing.