Some Facts About Construction of Lost Bridges of Tobolsk
In 2006 ambitious works were initiated in Tobolsk related to the sanation of rivers Slesarnaya (former Arkhangelsk) and Kurdyumka flowing from lower town. As a result of these activities wooden structures of lost bridges have been found along the riverbed of Slesarnaya - the only findings of this kind in Tobolsk up to the present moment. The article deals with the features of the two discovered constructions that were significantly different from each other. Based on the analysis of discovered fragments of wooden engineering structures two types of bridge piers were allocated. The first type - is crib pier; second - pile foundation. In addition, vertically standing planks (scaffold) were recorded designed to strengthen the bank. The uptime of the identified constructions is not precisely determined, but bridges on the Slesarnaya river were mentioned in the first half of the XVIII century including the surveyed areas of the riverbed according to a number of sources.