Based on available information, the boat ramp named 7th Avenue Northeast is located at the coordinates 33.22328949 latitude and -87.52540588 longitude in Tuscaloosa, Alabama. It is a public boat ramp that is open for use by the general public.

The width of the boat ramp is not specified in the available information, but it is described as a concrete ramp that is suitable for launching small and medium-sized boats. The ramp is also reported to be in good condition, which suggests that it is regularly maintained and updated as needed.

The boat ramp at 7th Avenue Northeast services the Black Warrior River, which is a major waterway in Alabama that runs through Tuscaloosa. This river is popular for recreational activities such as fishing, boating, and watersports, making the boat ramp a convenient access point for these activities.

As for the kind of craft permitted on the water, it appears that there are no restrictions on boat types or sizes. However, it is important to note that all boaters must follow the Alabama state regulations and guidelines for watercraft, including safety requirements and speed limits.

Overall, the boat ramp at 7th Avenue Northeast in Tuscaloosa, Alabama is a public concrete ramp that services the Black Warrior River. It is suitable for small to medium-sized boats and does not have any restrictions on the type of craft allowed on the water.