Hoffman's Mill

Courtesy the Brandywine River Museum

Hoffman’s Mill was built in 1864 by George Brinton, a local miller, on what was possibly the best site in Chester County. It was at a well-traveled crossroads; the swift-running Brandywine Creek provided ample power and in 1864 he had been able to purchase an acre giving access to the railroad built in 1858. Brinton formerly had operated a mill in Delaware County, but insufficient water power forced him to move the machinery to Chadds Ford, where he erected his Merchant Flour Mill. (Merchant refers to the production of flour for other than local persons.)

At least 150 years earlier, Francis Chadsey, who originally owned all of the land included in the village of Chadds Ford, had constructed a corn mill on the Brandywine nearby, but its exact location is not known. Tools and parts of what may have been a mill floor were found during excavations for the Hoffman Mill in 1864, but they may have been swept down by floods from a site farther upstream. The mill was sold in 1867 to Caleb Brinton, who went bankrupt a year later. George Brinton bought it back from him and two years later, George had to request sale of all of his and his wife’s real and personal estate to pay his debts. The mill was sold in 1871 to I. Lawrence Haldeman, a merchant from Media, PA, who was married to Josephine Brinton, a daughter of George Brinton’s brother, Caleb. The next year, Haldeman sold the mill to Sellers Hoffman, and it remained in the Hoffman family through three generations until 1948. In 1940 the Hoffman Mill at Chadds Ford, and the Brinton Mill further upstream (also owned by the Hoffmans) were the only flour-producing mills on the Brandywine. 

From 1948 to 1964, the mill and its accompanying land passed through the hands of four companies. The property was about to be sold for an industrial park when the newly-formed Tri-County Conservancy, made up of concerned local citizens, bought it at auction in 1967 to preserve the meadowland on the banks of the Brandywine. Before the renovation began in March, 1970, the mill, in its original condition, had proved an ideal setting for local art exhibitions and other activities. The mill was restored by the Baltimore architect James R. Grieves, and was opened to the public as the Brandywine River Museum in 1971. 

Mill Operation 

As far as can be determined, the mill was operated by four turbines, using the velocity of the water rather than its weight. These turbines were mounted horizontally, while the more familiar weight-operated overshot, breast, or undershot wheels were mounted vertically.  

From its beginning, the mill was "automated,” using a system developed by Oliver Evans (1755-1819) of Newport, Delaware. His system, in which grain was lifted by elevator to the top of the mill and fed through various stages by gravity, required only half the manpower of previous hand-loading systems.  

Two types of processing were typical. Local farmers brought corn which was broken and then milled while they waited. Larger volumes were processed by “in transit” milling, when the railroad brought in carloads of wheat to be milled, processed and packed in barrels for reshipment. The barrels were made in a cooper’s shop first located on nearby Route 100 and then moved closer to the mill. Other outbuildings included a large frame house and a kiln to dry corn. Tenements for the workers were erected near the original cooper’s chop. 

In 1882, the feed value of mill offals was first demonstrated, providing an extra source of revenue to the mil in the sale of coarse remainder of the flouring process for animal fodder. 

Some of the millstones may have been of local Chester County granite, but for the best ones, called buhr stones, they would have had to import them from La Ferte-sous-Jouarre, France. The French buhr stones were not made of a single stone, but pieces cemented together and backed by plaster of Paris. Dressing of these hard stones was expensive and arduous. The expression “to show one’s metal” comes from the bits of metal (or crushed stone) embedded in the hands of experiences stone dressers. 

By 1900 most of the milling was done by rollers, although millstones seem to have been used in the tail of the mill until it ceased production. Rollers were less expensive to maintain, more efficient and better suited to the gradual reduction process that yielded a larger percentage of high-grade flour.  

During World War I, the mill processed “hard mill flour” from winter wheat, used for coarse bread only. 

Hoffman’s Mill is no monument to a quaint pastoral American life that exists mainly in imagination. It is an uncompromising red-brick structure of 19th century industrial design, meant to hold machinery efficiently and operate at a profit. In it men worked long, hard hours, and occasionally died, as the time when the front wall of four bins of wheat collapsed and killed a man beneath.