Son of prominent Philadelphia engineer Frederick Graff and Judith (Sawyer) Graff, the younger Graff was first directed away from an engineering career into one of business; but he soon returned to engineering, gaining experience in his father's successful Philadelphia office. By 1842 he had become an assistant engineer in the Philadelphia Water Department and in 1847 became chief engineer of the Department. From 1847 to 1856 and again from 1866 to 1872 he held this position, having considerable effect on Philadelphia's water supply delivery system. After 1872 Graff pursued an independent practice and became well-known as a waterworks engineer. (From 1873 to 1877 he associated with Henry R. Worthington in this endeavor.)
Sandra L. Tatman.
Clubs and Membership Organizations
- American Society of Civil Engineers
- Engineers Club
- Franklin Institute
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