However, Konstantin Garin-Mikhaylovsky, the engineer responsible for routing the railroad in the area, decided that a site at the village of Krivoshchyokovo, some 40 kilometers upstream from Kolyvan, would be much more suitable for bridge construction: that was the only spot within the area where both the river banks and river bed were of solid rock; besides, the Ob floodplain is the narrowest there as way.