According to the latest information available, Nimrod 1 boat ramp is located in Oregon at latitude 42.46271896 and longitude -121.46543121. It is a concrete boat ramp that is wide enough to accommodate medium-sized boats. The ramp provides easy access to the Upper Klamath Lake, which is the largest freshwater lake in Oregon.

The body of water serviced by the Nimrod 1 boat ramp is primarily used for recreational activities including fishing, boating, and water sports. The lake is also home to a diverse range of fish species, including rainbow trout, yellow perch, and largemouth bass.

As far as the type of craft permitted on the water, the state of Oregon regulates the use of boats based on size, horsepower, and other factors. Generally, all types of boats are allowed on the Upper Klamath Lake, as long as they comply with state regulations. Boaters are required to have a valid boater's license and must follow all safety rules and regulations.

In summary, the Nimrod 1 boat ramp is a concrete ramp located in Oregon, providing access to the Upper Klamath Lake for boating and fishing enthusiasts. It is wide enough to accommodate medium-sized boats and is suitable for a variety of recreational water activities.