The Shriver family owned and operated the mill for almost 200 years until the 1950s. George Washington also had a Oliver Evans style mill at Mount Vernon, which has been reconstructed and working.
The history of the mill and home "Homestead" at Union Mills is detailed on their website HERE
Milling flour at the Union Mills Maryland using 200 year-old quartz millstones:
George Washington's Gristmill: The Oliver Evans System :
In addition to a video, there is a Virtual Tour of each floor of the gristmill where you can click to see closeup or moving image of the equipment. HERE
©2017 Patricia Bixler Reber
Forgotten history of Ellicott City & Howard County MD