The John B. McCormick House is an historic American home that is located in South Mahoning Township, Indiana County, Pennsylvania.

At that time, a large, two-story hip and gable roofed addition was built on the rear.

The original house was modified with the addition of a three-story stone tower, porch with Doric order supporting columns, and dormers.

In 1870 he moved from Pennsylvania to Holyoke, Massachusetts where he designed, using the flumes at John Wesley Emerson's plant, what would later become the Hercules water turbine.

[3] Under various names, including the Hercules brand,[4] and patents, it was manufactured in Holyoke, Dayton, Ohio, and Glasgow, Scotland and Imatra, Finland.