Set of 18 color slides labeled "River bond & wetland reclamation, aeration 2007." Part of the Cal R. Fremling collection. Slides are mostly unlabeled and not numbered consecutively. Exact location unknown. Slides show wetlands, marsh, County Ditch #4, aeration of a lake or pond with a floating aerator. Aeration slides are dated 2007, possibly a location in Eagan, MN. Slide print date is otherwise unknown. Originally in one box.
