Historic image HHW�460 is part of the 'Historic photolab Images' collection; the topic area is 'Concrete'. Location is Prince William Co. (estimated). The image has the following description: 'Roll 15-25. Smith-Medlin, concrete cattle guards, feeders, & water troughs .' The image was scanned from a photo as part of the USGS NGGDPP deliverable for 2016-2017. The physical location is 900 Natural Resources Dr., Ste 400, Charlottesville, VA 22903. Room 1093 (photolab) The author is HHW. The image is dated unknown.