Concrete Piers along Commerce St. Album Random Photos Image 19/113 Jun 18, 2010 20:14 Original Metadata Camera Model:Canon PowerShot S5 IS Original Time Taken:Jun 18, 2010 20:14 Shutter Speed:1/8 sec Aperture:f/3.5 ISO Sensitivity:200 Exposure Compensation:0 EV Metering Mode:Pattern Flash Fired:No Flash Focal Length:14.9 mm I'd like to know what the historic purpose of these used to be.