This historical research was executed on the program realization of regional educational component #The Future of Altai#. In virtue of the documents of Centre of the keeping of files of Altai region the constructive peculiarities of Barnaul silver-melting plant were formed. The events of the flood 1793 were reconstructed. Its reasons and the dimension of the doing loss were defined. This flood influenced on the historical figure of Barnaul and on the development of the Russian hydro-technique in XVIII– first part of XIX centuries.