CANNON FALLS, Minn. -- Shahin Khazrajarari, left, Corps of Engineers, St. Paul District project manager, and Farley Haase, Corps of Engineers, St. Paul District survey technician, conduct snow surveys near the Cannon River in Cannon Falls, Minn., Feb 28, 2011. The district conducts the surveys to help determine what the snow water equivalent, or how much water, is located within the snowpack.