Hough Associates

Landmark Engineering offers surveying, engineering, planning and design services in civil and site engineering. The firm will perform planning and site design services for public and private projects, which include schematic design, design development, construction documents and cost estimates, as well as assistance in obtaining approvals and permits. Engineering disciplines available include topographic surveys, site engineering, grading and drainage, hydraulic analyses and design, streets and entrances, sanitary and storm sewer utilities, erosion and sediment control plans, supporting structural design, preparation and submission of federal, state and local permit applications, other agency processings and construction phase services. Landmark Engineering is located in New Castle, Del.

With more than 15 offices throughout the United States, Tetra Tech NUS provides environmental consulting and engineering, remediation, construction and information technology services to government and commercial clients. It offers air quality, regulatory compliance, environmental analysis, planning, hazardous waste management, nuclear plant licensing and risk assessment solutions. The company also specializes in the water and wastewater treatment services. Tetra Tech NUS is a subsidiary of Tetra Tech, which is one of the world s leading companies that provides consulting, engineering and technical services. Founded in 1996, the parent company maintains a staff of over 10,000 employees. It offers solutions for waterways, harbors and coastal areas. Tetra Tech operates various subsidiaries, including Tetra Tech FC, Tetra Tech International and Tetra Tech International.