Archives at the Institute for Fisheries Research (IFR) hold records of thousands of lake surveys from the University of Michigan and Michigan Department of Natural Resources. The records contained in this dataset are jpeg images of the index card records from the IFR surveys. Images include the front of the card and when available, the back of a card. and Lake volume analysis cards describe the acreage of different parts of the lake as well as the acre feet at different depth contours. Information also includes the location, surface elevation, area of the lake, date, and name of investigator.
