Keystone Consulting Engineers is a civil consulting engineering firm that provides services in the Lehigh Valley region of Pennsylvania. Its areas of expertise include precision boundary and topographic surveying, construction inspection, subdivision and land development, highway and traffic engineering, as well as sanitary sewer and water distribution system design. Keystone Consulting Engineers is a wholly owned Pennsylvania corporation and has more than 50 employees. Its clients include American Bank, DeSales University,Bethlehem Steel Corporation, and Air Products & Chemicals. The company was founded as Waldraff Associates in 1972 by Frank G. Waldraff. It maintains offices in Bethlehem and Wescosville, Pa.
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