Hopewell Valley Engineering P C

Established in 1971, Chester, Ploussas, Lisowsky Partnership is a company that offers a range of planning, engineering, surveying and landscape architecture services. The company serves the developers of residential, commercial and industrial projects in New Jersey, New York, Pennsylvania and Delaware. Its clients include the Atlantic Realty Development Corporation, Eastern Properties, Ginsburg Development Companies, Hoboken Brownstone Company and Oakwood Homes. Chester, Ploussas, Lisowsky Partnership provides site analysis and selection services for institutional campuses, retirement communities, private residences, town centers, and parks and playgrounds. It additionally offers zoning, site work review, upcoding, highway design, and drainage and slip and fall analysis services.

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.