After conducting research, I was unable to find any information regarding a boat ramp named Pennsylvania Avenue 3885 in Fair Oaks, California. It is possible that the name has changed or that the ramp no longer exists.

Without accurate information, it is difficult to determine the specific details of the boat ramp, such as its width, type, and permitted watercraft. However, in general, boat ramps can vary in size and design, from small concrete ramps to large paved areas with multiple launch lanes and docks.

The body of water that a boat ramp services can also vary. It could be a river, lake, or ocean. However, in the case of Fair Oaks, California, there are several major waterways nearby, including the American River, the Sacramento River, and Folsom Lake.

The types of watercraft permitted on the water can also vary depending on the area's regulations. Common watercraft that are allowed on most bodies of water include motorboats, sailboats, kayaks, and canoes. However, some areas may have restrictions on the size of boats or the use of certain types of watercraft.

In conclusion, without specific information about the Pennsylvania Avenue 3885 boat ramp in Fair Oaks, California, it is impossible to accurately determine its characteristics and the watercraft permitted on the water.