Home « keystoneconsultingengineers.com Keystone Consulting Engineers – multi-discipline civil engineering firm servicing over 200 municipal, commercial, industrial, residential and institutional clients in the Lehigh Valley. Practice areas include: municipal engineering, surveying, environmental engineering, highway & traffic engineering, soil sciences, subdivision and land development, construction inspection, geographic information systems (GIS). Keystoneconsultingengineers.net~Site InfoWhoisTrace RouteRBL Check