After conducting research, I was unable to find any specific information about a boat ramp named Farm to Market 315 in Chandler, Texas. There are several boat ramps in the area, but without a specific address or additional details about the ramp, I am unable to provide information about its width, the body of water it services, or the type of craft permitted on the water.

Therefore, I recommend contacting local authorities or the Texas Parks and Wildlife Department for more information about the specific boat ramp in question. They will be able to provide accurate and up-to-date information about the ramp and any regulations or restrictions in place for boaters.