After conducting research, I could not find any specific information about a boat ramp named Riverside in Texas with the given latitude and longitude coordinates. Therefore, I cannot accurately discuss the characteristics of this particular boat ramp.

However, in general, boat ramps in Texas can vary in size and capacity. Some boat ramps are small and only accommodate smaller watercraft, while others are larger and can accommodate boats of various sizes. Most boat ramps in Texas provide access to lakes, rivers, and other bodies of water for recreational boating activities.

In terms of the types of watercraft allowed on the water, this can vary depending on the specific body of water and any regulations or restrictions in place. Some bodies of water may only allow certain types of watercraft or may have restrictions on the size or horsepower of boats allowed. It is important for boaters to check local regulations and guidelines before launching their watercraft.