Hydro-accoustic camera
Photo Credit: Laura Bremer
Aaron McFarlane, Corps of Engineers St. Paul District environmental scientist, connects cables for a hydro-accoustic camera before departing on a boat ride along the Mississippi RIver in Minneapolis to research how fish behave around a lock and dam June 7. --USACE Photo by Laura Bremer
Page last updated Thu August 30th, 2012 at 00:00