The Soviet Christopol Shipyard according to a CIA report dated September 1967

An item reported the fenced and road served Soviet Christopol Shipyard with the geographic coordinates 55.22.45 north and 50.38.20 east and the north east border of Christopol on the south bank of the Kama and probably used for repairing river craft. The shipyard possessed a side-haul marine railway with a transverse slipway for which a crane was available, a wharf, a quay and 2 shop and 11 support buildings.

Source
The report was published on www.archive.org, document number CIA-RDP78T04759A007300010035-9