Peirce Mill, Water mill in Rock Creek Park, Washington D.C., United States
The three-story stone mill contains three pairs of millstones weighing 2,400 pounds each and rotating at 125 revolutions per minute.
Built in 1829 by Isaac Peirce, this mill operated continuously until 1897 when the main shaft broke during the grinding of a commercial rye load.
The mill stands as a testament to the early industrial heritage of Washington D.C., demonstrating the automated milling techniques developed by Oliver Evans.
The National Park Service conducts milling demonstrations on the second and fourth Saturdays from April through October at 2401 Tilden Street Northwest.
The mill machinery utilizes 60 percent of its generated power for turning the millstones, with the remaining 40 percent dedicated to other operations.
Location: Washington, D.C.
Inception: 1829
GPS coordinates: 38.94000,-77.05222
Latest update: September 23, 2025 14:24
Washington DC, the capital of the United States, houses the three branches of federal government and the nation's most significant political institutions. The White House serves as the presidential residence, while the Capitol building hosts Congress and the Supreme Court represents the judicial branch. The National Mall extends 2 miles (3 kilometers) and connects historic monuments such as the Lincoln Memorial, Jefferson Memorial, and Washington Monument, which commemorate the nation's founders. The city holds an exceptional concentration of museums, many belonging to the Smithsonian Institution and offering free admission. The National Air and Space Museum displays the history of aviation and space exploration, while the National Gallery of Art presents an extensive collection of European and American art. The Library of Congress preserves over 170 million items and ranks as the largest library in the world. Memorials such as the Vietnam Veterans Memorial and the Martin Luther King Jr. Memorial honor significant events and figures in American history. Historic districts like Georgetown and Embassy Row, along with green spaces such as the Tidal Basin and Theodore Roosevelt Island Park, complement the capital's cultural and natural offerings.
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