How many people have walked through the doors beneath this sign? Harrison Radiator began in the late summer of 1910. Today, the West Plant still hums with the sounds of production, albeit at a far lesser capacity than at its heyday. The Main Plant, on Walnut Street where this photo was taken, is now home to Trek, Challenger Learning Center, and other small businesses. A century after its construction, the old Harrison plant continues the stand sentry over the city of Lockport.