Fort Roberdeau Historic Site

Fort Roberdeau was erected in 1778 in Sinking Valley, in what is now Tyrone Township, Blair County, Pennsylvania. General Daniel Roberdeau, a Continental Congress delegate, built the stockade to protect lead miners and smelting operations whose output was critical to the Continental Army's ammunition supply during the Revolutionary War. The fort consisted of horizontal log walls with a bastion at each corner and was garrisoned until roughly 1780.

After the war the original fort fell into ruin and ultimately vanished from the landscape, leaving only its footprint in the surrounding farm fields. In 1974 the site was added to the National Register of Historic Places, and in the mid-1970s a full reconstruction was undertaken, rebuilt a short distance from the original location. The reconstructed complex includes officers' quarters, a storehouse, barracks, a blacksmith shop, a lead miner's cabin, a powder magazine and a lead smelter.

The 230-acre property is operated as a county historic site and natural area. In addition to the fort, it preserves a restored nineteenth-century barn that serves as a visitor center, a restored farmhouse, a sinkhole, and a trail system. Living-history events and educational programs interpret the fort's Revolutionary War role for visitors during the seasonal open period.

Because the reconstruction sits roughly a quarter mile from the original earthworks, local tradition holds that disturbing the original ground is the source of the site's reported hauntings, which cluster along the entrance road and the adjacent fields rather than at the rebuilt fort itself.