when the western leg of the viaduct was completed in 1919, it served both directions of traffic, and also served as a second level for picking up and dropping off passengers. state - 79% 
2011 - 96% (1% below basic). the building was built in 1892 as an ice plant. nevertheless, warm clothing and good shoes are required as temperature during the night can drop as low as  and winds can be very strong. as a result, when the peg moves around with the wheel, it makes the shaft move up and down within limits. 