[2] The United States Government bought the mill as part of Rock Creek Park in 1892.

[4] Peirce Mill was restored as a Public Works Administration project,[5] completed in March 1936, at a cost of $26,614.

In 1997, a restoration effort was begun by the Friends of Peirce Mill (FOPM).

The mill was restored with the support of the American Recovery and Reinvestment Act (ARRA).

[7] The NPS typically runs mill operation demonstrations on the 2nd and 4th Saturday of each month, April through October.