There is an RIDC development in Rankin. RAAC owns the bridge and much of the other land. Rivers of steels owns Carrie Furnace in swissvale (or at least they did).

Normally, property lines and ownership can be seen on the county GIS website:
https://openac-alcogis.opendata.arcgis.com/apps/b4b1dbb65b4943538425bb5ae0f8f62b/explore

But for some reason, many of the nearby parcels are missing data right now. Perhaps they changed hands recently.