The mill at Colvin Run dates to the early 1800s, and the surrounding landscape continued to evolve as mill operators and owners added new buildings and modified existing ones to meet changing technology, work, or family needs. Early outbuildings included a kitchen and an ice house. The Millard family, who lived here in the late 19th and early 20th centuries, raised cows in a dairy barn that once stood where the Education Center is today and stored milk, butter, and cheese in a nearby icehouse. Their facilities also included a smokehouse, washhouse, and granary. Run by Maude and Mark Cockrill, the General Store was originally located across the road from the mill and was moved to its current location by the Park Authority in 1974 to preserve this important community gathering place. In an undated photo, men and a woman stand directly in front of the mill, with a low wooden building to its left that was likely a granary used to store grain brought by farmers to be ground, and a grain scale in the left foreground used to weigh the farmers' haul.