(Ashland, OR) -- A boat with invasive quagga mussels was stopped at the Ashland Boat Inspection Station. Oregon watches boats for quagga and zebra mussels to keep them out of lakes and rivers. They can cause millions of dollars in damage to irrigation equipment and dams. The boat was from Lake Havasu, Arizona. The boat was decontaminated and the mussels removed. Since the boat inspection program started in 2010, there have been 185 boats found with invasive freshwater mussels and more than 37-hundred boats with other types of aquatic biofouling.