Based on the latest information available, the boat ramp named Sherman Lumber Co Road Penobscot County in Maine is a concrete boat ramp that is approximately 16 feet wide. It services the Mattawamkeag River, which flows into the Penobscot River. The boat ramp is suitable for small boats, canoes, and kayaks. However, it may not be suitable for larger watercraft. It is important to note that the rules and regulations regarding the use of the Sherman Lumber Co Road boat ramp may change over time, so it is recommended to check with local authorities for the latest information before using this facility.