 During the storm of Kazan Kazan Chronicle reported that Bolaq was already swamped and served only as defence zone.In the 19th century as a result of the city's economical development Bolaq was reconstructed, embankments were built on apartments and depots, first wooden bridges were built.The first arched stone bridge was built in 1907 by the project of Lev Kazimirovich Khrshchonovich.