The Garfield County Conservation District operates two Watercraft Inspection Stations with around twenty employees between the both. These stations are here as a way of intercepting vessels and equipment that have the potential to spread aquatic invasive species (AIS) and to decontaminate them (if necessary) before launching into Montana waters. The aquatic invasive species that they are on the look out for are things known as Quagga Mussels or Zebra Mussels. These mussels clog water intake structures, such as pipelines and screens, reducing pumping capabilities for power and water treatment facilities. Recreation-based industries and activities are also affected by the mussels which take up residence on docks, break walls, buoys, boats and beaches. Aquatic invasive species like quagga mussels and zebra mussels are small organisms that could have huge impacts for Montana and Wyoming waters, boaters, and anglers. There are other things that these mussels can ruin and that is fisheries, clog cooling systems in motorboats, foul hulls, and ruin equipment.