Quagga and Zebra Mussels are aquatic invasive species that are rapidly expanding their range in the Western United States. Popular recreational reservoirs on or connected to the lower Colorado River are one major source of invasive mussels, which are easily transported via trailered watercraft to areas that have not yet been invaded. This Request For Proposals (RFP) will fund proposals in the listed principal areas towards the fulfillment of the top priorities in the Quagga/Zebra Mussel Action Plan for Western U.S. Waters (QZAP 2.0) and will be limited to states within the boundaries of the Western Regional Panel within the United States, not including Canada and Mexico (see map).