- Eleutherian Mills
Infobox_nrhp | name =Eleutherian Mills
nrhp_type =nhl
caption = Working powder mills on Brandywine Creek, about 1905. Note the handwritten "These blow up occasionally, and then?"
nearest_city=Wilmington, Delaware
locmapin = Delaware
area =
built =1803
architect= Unknown
architecture= No Style Listed
designated=November 13 ,1966 cite web|url=http://tps.cr.nps.gov/nhl/detail.cfm?ResourceId=159&ResourceType=District
title=Eleutherian Mills |accessdate=2007-09-27|work=National Historic Landmark summary listing|publisher=National Park Service]
added =November 13 ,1966 cite web|url=http://www.nr.nps.gov/|title=National Register Information System|date=2007-01-23|work=National Register of Historic Places|publisher=National Park Service]
governing_body = Private
refnum=66000259From 1802 to 1921, Eleutherian Mills was a gunpowder mill site used for the manufacture of explosives by theDu Pont family business. The name also refers to the house on the hill above the mills, which was the first Du Pont family home in America. The business was founded byEleuthère Irénée du Pont . In 1952, the site became an outdoor museum and theHagley Museum and Library was founded.History
Jacob Broom built acotton mill on the site in 1795. The mill burned down in 1797, and in 1802 he sold the site, complete with a workingdam andmillrace toEleuthère Irénée du Pont , who paid $6,740 for the 95 acres.Kinnane, Adrian (2002). "DuPont: From the Banks of the Brandywine to Miracles of Science". Wilmington: E.I. du Pont de Nemours and Company. ISBN 0-8018-7059-3]The first domestic supplies of high-quality gunpowder were made in the USA by E. I. du Pont de Nemours and Company.Brown, G.I. (1998). "The Big Bang: A history of explosives". Thrupp: Sutton Publishing Limited. ISBN 0-7509-2361-x.] The company was founded in 1802 by E.I. du Pont, two years after he and his family left
France to escape theFrench Revolution .Citation | last =du Pont | first =B.G. | year =1920 | title =E.I. du Pont de Nemours and Company: A History 1802 to 1902 | place =Boston | publisher =Houghton Mifflin | isbn =1-4179-1685-0]They set up the Eleutherian gunpowder mill on the Brandywine Creek just north of
Wilmington, Delaware , based on gunpowder machinery bought from France and site plans for a gunpowder mill supplied by the French Government. They also built housing for 30 workers.Starting, initially, by reworking damaged gunpowder and refining saltpetre for the US Government they quickly moved into gunpowder manufacture.
Saltpetre was refined in an area between the house and the mills that now is occupied by a formal garden.
Charcoal was produced from thewillow trees that lined the Brandywine.By the end of 1804, DuPont had sold 39,000 pounds of powder; the following year sales tripled. The Federal government and
John Jacob Astor 'sAmerican Fur Company became regular customers. In 1813 the Hagley property, just downstream from the original mills, was purchased, doubling the size and capacity of the mills. Sales grew during theMexican-American War and theCrimean War . During theAmerican Civil War , the firm sold 4,000,000 barrels of powder to the Federal government.A major explosion killed 33 people in 1818. Another major explosion occurred on the site in 1847. In 1854 three gunpowder wagons exploded in the city of Wilmington.
The site
The mill buildings used in the manufacture of gunpowder were built with strong stone-walled structures on three sides; but were only covered by light wood structures on the fourth side, which faced out onto the Brandywine Creek. When an accident occurred, the explosion was directed away from the other mills and storage areas and over the creek.
Water power was provided from a
mill race behind the mills, thus further isolating the mills in case of accident. One water wheel was often used to provide power to two mills. Waterturbine s were introduced in the 1840s.Alfred Victor du Pont acquired additional property, down stream from the Eleutherian Mills, to add to the manufacturing site. One of these properties was called "Hagley", and it became known as the Hagley Yard.Most of the industrial remains are located in the Hagley Yard. The mills were used in the purification, crushing, and mixing ofcharcoal ,sulfur , andsaltpeter . Other mills in the complex were used for glazing and corning, making metal powder kegs, and in cotton and woolen manufacturing. Stables, offices, a machine shop, and a steam powerhouse from the late 1800s also were located in the complex, as was a narrow gauge railway.Rundown and closure
After the introduction of
smokeless powder , the mills were to be closed in the 1910s, but were kept open at the request of the Federal government until after the end ofWorld War I .In 1952 family members donated convert|185|acre|km2 of land and the
DuPont company established a $6,000,000 endowment for the Eleutherian Mill-Hagley Foundation for a museum ofindustrial history .The site was declared a
National Historic Landmark in 1966.citation|title=PDFlink|http://pdfhost.focus.nps.gov/docs/NHLS/Text/66000259.pdf National Register of Historic Places Inventory-Nomination: Eleutherian Mills|393 KB|author=Richard Greenwood |date=1979|publisher=National Park Service and PDFlink| [http://pdfhost.focus.nps.gov/docs/NHLS/Photos/66000259.pdf "Accompanying 12 photos, from 1966-1975"] |6.48 MB]It is located on
Delaware Route 141 at Brandywine Creek Bridge.ee also
Gunpowder
*
History of gunpowder
*Gunpowder USA
*
Brandywine Battlefield
*Hagley Museum and Library Elsewhere
*
Ballincollig Royal Gunpowder Mills
*Faversham explosives industry
*Waltham Abbey Royal Gunpowder Mills References
External links
* [http://hdl.loc.gov/loc.pnp/hhh.de0154 DuPont Powder Mill, Hagley Museum, on Brandywine River, Greenville vicinity, New Castle County, DE: 3 photos, 4 drawings, 3 data pages and supplemental material] , at
Historic American Building Survey
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