According to the Idaho Department of Parks and Recreation website, the US 93 East Salmon boat ramp is a concrete ramp that is 20 feet wide. It services the Salmon River, which is a popular destination for fishing, rafting, and kayaking. The website states that the Salmon River is "generally navigable by rafts, kayaks, and drift boats," indicating that these types of watercraft are permitted on the water. However, it is important to note that specific regulations and restrictions may vary depending on the section of the river and the time of year. It is always recommended to check with local authorities or the Idaho Department of Fish and Game for the most up-to-date information on permitted watercraft and regulations.