Unclaimed bicycles are taken to the Mike Durfee State Prison in Springfield and refurbished by inmates as part of an inmate work program called Pedal Power from The Pen. Each year inmates fix up and repaint hundreds of bicycles to be put back into service by underprivileged kids across the state of South Dakota. Sioux Falls drop-off site - for bikes and wheelchairs behind the prison industry building (1600 N. Drive Sioux Falls, SD 57117). Look for signage for Pheasantland Industries, small building. North side of prison at the bottom of the parking lot.