According to the latest information available, the Long Arm Dam boat ramp is located at the Lawrence B. Sheppard Reservoir in Pennsylvania. This boat ramp is considered a concrete ramp, which means it is made of concrete and is durable enough to withstand heavy use. The ramp is reported to be 24 feet wide, which is wide enough to accommodate most types of watercraft.

The Long Arm Dam boat ramp services the Lawrence B. Sheppard Reservoir, which is a man-made lake that covers 90 acres of land. This reservoir was created in 1972 by damming Long Arm Creek, which is a tributary of the Susquehanna River. It is a popular spot for fishing, boating, and other recreational activities.

As for the types of watercraft allowed on the reservoir, the Pennsylvania Fish and Boat Commission states that all types of boats are permitted, including motorized and non-motorized boats, as well as canoes and kayaks. However, all boats must be registered or have a valid launch permit from the Commission. It is also important to note that certain regulations apply to the use of motorized boats, such as speed limits and restrictions on waterskiing and wakeboarding.

In summary, the Long Arm Dam boat ramp is a concrete ramp that is 24 feet wide and services the Lawrence B. Sheppard Reservoir in Pennsylvania. The reservoir allows for the use of all types of watercraft, including motorized and non-motorized boats, canoes, and kayaks, but certain regulations apply.