Achey's Mill

Achey's Mill is a former grist mill located in Milford Square, Pennsylvania, United States fed by the Unami Creek. It was in operation until sometime between 1926 and 1936. The mill was converted into a private residence in the late 1960s. There is a mill house that was located on the same property parcel until 1962, when the parcel was sub-divided. Outbuildings on both properties were used to assist the mill and its race. Today, both mill properties are owned privately as a private residence.

The date when the mill was built is unknown, but based on records and documents it has been standing since c. 1750. The mill house was built in 1740, and was renovated into the manor house of Heistville (former name of Milford Square) in 1818, by the Heist family. The house was also featured in the November 1, 1786, edition of Ben Franklin's Pennsylvania Gazette, where it was advertised for sale. Both properties tie their roots back originally to Sen. Joseph Growden who inherited 1490 acres from William Penn in 1715. The two properties have shrunk to just above 110 acres due to a large forest on them.

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