description Rock Run Mill Overview
Rock Run Mill is a historic water-powered grist mill in Susquehanna State Park in Maryland. The mill dates to the late eighteenth century and is associated with the agricultural and industrial history of Harford County, where watermills processed grain for nearby communities. The preserved building functions as a living-history site, helping visitors examine milling machinery, local water power, and nineteenth-century rural work.
help Rock Run Mill FAQ
Where can I see Rock Run Mill?
Rock Run Mill is in Susquehanna State Park in Maryland, near the Susquehanna River. The restored site includes the three-story stone gristmill and historic mill equipment.
Who built Rock Run Grist Mill?
Maryland sources identify John Stump as the builder of Rock Run Grist Mill. The mill is generally dated to 1794 and was designed to use water power for grinding grain.
Does Rock Run Mill still grind corn?
Yes, the mill is operated for public demonstrations during the summer season. Maryland describes weekend corn-grinding demonstrations from 1 to 4 p.m. between May 1 and Labor Day.
What can visitors learn at Rock Run Mill besides seeing the water wheel?
The interior displays 19th-century farm and milling equipment, showing how grain was processed before electric power. The mill also illustrates how a dam and millrace supplied water power to the machinery.
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