ISDA has issued a quarantine of the Snake River from Twin Falls Dam to the partial bridge structure at the bottom of Yingst Grade (known as "the Broken Bridge", "Yingst Grade Bridge", the "Old Interstate Bridge"), which is approximately one-half (1/2) mile upstream of Auger Falls to contain and treat quagga mussels. All public access to the Snake River via watercraft or other conveyance between Pillar Falls and Twin Falls hydroelectric facility is prohibited. Access to the river by watercraft or other conveyance between the bottom of Yingst Grade (known as "the Broken Bridge", "Yingst Grade Bridge", the "Old Interstate Bridge"), which is approximately one-half (1/2) mile upstream of Auger Falls, and Pillar Falls is restricted. Launch of watercraft in this section is restricted to the hours when the watercraft inspection station at Centennial Park is in operation and requires inspection and decontamination of all conveyances and watercraft by ISDA or an assigned entity prior to launch into and upon exit from the water. This requirement applies to all motorized and non-motorized watercraft of any size, including paddle boards and kayaks.
Idaho Admin. Code r. 02.06.09.135