Graff, Frederick, 1774-1847

Philadelphia engineer.

Frederick Graff was an engineer and architect. Born August 27, 1774 in Philadelphia, he was the third in a line of American builders, contractors, and engineers. In 1797, Graff began his apprenticeship as a draftsman for the Philadelphia waterworks, where he became superintendent in 1805. He contributed to its success for the remainder of his life, remaining chief engineer until his death. His son, Frederic Graff (1817-1890), was his successor. The Philadelphia waterworks was the first steam powered waterworks in the United States. It was later notable for its efficient hydraulic system developed by Graff with practically no data on which to base his calculations. Graff designed the neo-classical buildings as well as the machinery associated with the waterworks.