New or Noteworthy
Whenever there is something we just can wait to share with all of our friends or think it is too precious to keep to ourselves, we will post an entry here. Our Facebook page keeps track of on-going activities and the newsletter - Grist from the Mill - provides an excellent summary of past events.
Waterwheel and Flume Replacement
After many years of wear, tear, and the elements, it is time to replace the waterwheel and flume. Operations, funded by the Fairfax County Park Authority, are underway. This is not your ordinary home or mill repair. Care is required to maintain the integrity of this historical treasure. Below are a few "before" and "after" pictures, courtesy of FOCRM Robert Coblenz with commentary by FOCRM Mike Henry. For more action, see the video below.
Removal of Waterwheel
Simple Machines at the Mill
You all know about simple machines, right? As a reminder, they are: lever, wedge, screw, inclined plane, pulley, and wheel and axle. Simple. Dani, an outstanding educator at Colvin Run Mill, shows how simple machines make work easier at the mill.
Award Winning "STEM in 30!" of the National Air and Space Museum shows how simple tools at the mill are use to solve complex problems today. Not outer space: down to earth.
The STEM in 30! team was amazed at the mill; you will be too.
FOCRM President's virtual presentation to the Fairfax County Board of Supervisors 2020 Budget Hearing
FOCRM likes to show support for our favorite historic park.
The Story of Colvin Run Mill Restoration 1968-1972
You really will enjoy this outstanding compilation of pictures and music assembled by Robert Coblenz, member of the Board of Directors, FOCRM
Miller Opens Head Gate and Engages Gears
And the big water wheel starts turning
Sifting the Grind
The Rolling Sieve in the bolting box separates the ground grain into batches of different fineness. The sieve frame is a cylinder covered with coarsely woven silk at the one end and finely woven silk at the other. As the grain moves through the inside of the cylinder, fine flour falls through at one end and course at the other end.
Getting Ready to Grind
The runner stone is balanced on top of the bed stone, then encircled with a wooden hoop. The hoop is topped with the shoe, the damsel, the chair and the hopper.
Complete Milling Process: High Tech 1794
Grain is first weighed then travels up the elevator to be cleaned. It then travels down to the mill stones for grinding, back up to the hopper boy for drying and then off to be sifted and packed in barrels.
Did you know?
Colvin Run Mill is a Mechanical Engineering Landmark
The American Society of Mechanical Engineers (ASME) has designated Colvin Run Mill a landmark and a "good example of a typical early 19th-century (US) water-powered, Evans-type flour mill, restored into operating condition." This is quite a distinction!
The ASME "Historic Mechanical Engineering Landmarks are existing artifacts or systems representing a significant mechanical engineering technology. They generally are the oldest extant, last surviving examples typical of a period, or they are machines with some unusual distinction.
Landmarks, sites and collections of historic importance to mechanical engineering are designated by ASME through its History and Heritage Landmarks Program. Landmark status indicates that the artifact, site or collection represents a significant step forward in the evolution of mechanical engineering and is the best known example of its kind. A plaque is presented for display, a commemorative brochure is prepared, and a roster is kept to promote long-term recognition and preservation efforts."
The link below takes you to the ASME's write up.