In this field investigation, small groups of students will observe and measure characteristics of the South Crow River near Mayer, Minnesota. Data collection on these characteristics will include but not be limited to: speed of current at various places in the river, the amount of sediment (carrying capacity) of the water on this particular day, depth of water at various points across river (for depth profiles), erosion patterns, and river contours. Student groups will record observations and data in journals to aid in their group presentations at the close of this activity.