Unfortunately, as a language model AI, I do not have access to real-time or latest information. However, based on the available information, the Sand Island Access boat ramp is located in Bethlehem, Pennsylvania. It provides public access to the Lehigh River and allows boaters to launch small watercraft, such as canoes, kayaks, and small motorized boats. The width of the boat ramp is not specified, but it is large enough to accommodate small watercraft. It is a single-lane concrete boat ramp, with a floating dock and a parking area for vehicles and trailers. Additionally, the boat ramp is operated and maintained by the City of Bethlehem.