TWIN FALLS, Idaho (KMVT/KSVT) -On September 24, the Idaho State Department of Agriculture (ISDA) confirmed a small number of quagga mussel in the Snake River. On Tuesday, the ISDA will launch a 10-day treatment for quagga mussels, with treatment being downriver of Hansen Bridge to Centennial Water Front Park. River access is closed from Hansen Bridge to Yingst Grand.