Based on the latest available information, the Lavinia Avenue boat ramp in Sandpoint, Idaho is a concrete boat ramp that is approximately 12 feet wide. It services the Pend Oreille River, which is a large body of water that runs through Idaho, Washington, and British Columbia.

This boat ramp is designed for small to medium-sized watercraft, such as fishing boats, ski boats, and pontoon boats. There are no restrictions on the type of boat that can be launched from this ramp, as long as it is legally registered and compliant with local boating regulations.

It's important to note that local boating regulations can change frequently, so it is always a good idea to check with the appropriate authorities before launching a boat at any location. Additionally, weather and water conditions can also impact the safety of boating activities, so it's essential to exercise caution and follow best practices for safe boating.