Situation: Industrial zone with factory, immediately NE of Rome. River hex SE of Rome with dyes / forest. The river connects Rome and the dyes hex but doesn't border the factory hex. I want to build Ruhr in the dyes hex, but it won't let me, even if I cut the forest. And no, it's not floodplain.
Is there anything I can do to make the hex a valid site for Ruhr?
Is there anything I can do to make the hex a valid site for Ruhr?