The Soviet Belomorsk Boatyard according to a CIA report dated September 1967

An item reported that the Belomorsk Boatyard with the geographic coordinates 64.31.35 North and 35.46.50 East was located on the east edge of Belomorsk [nowadays the Repeblic Karelia, Russia]. This just small repair yard possessed an end-haul marine railway, two piers, one small floating dry dock, one shop building and at least 8 support buildings.

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