The columns denote both the year of Columbus' historic flood (1913) and the water level datum (724.11 msl, or mean sea level). They aren't the only reminders of Franklinton's history around ...

The columns denote both the year of Columbus' historic flood (1913) and the water level datum (724.11 msl, or mean sea level). They aren't the only reminders of Franklinton's history around ...

But each of the columns are inscribed with "1913" on one side and "724.11 msl" on the other. Thankfully, we got our answer quicker than expected.