Trotter and Associates, Inc.

Full Service Architectural & Engineering Firm.Larson & Darby is a full-service architectural, engineering, interior design and technology firm. We are able to bring a broad, multi-disciplined perspective to the design process. Mix in a passion for great design and service that has fueled us for nearly 50 years and you have a firm thats uniquely suited to solve your design challenges.Our Services Include: Architecture Master Planning Interior Design Structural Engineering Mechanical Engineering Electrical Engineering Plumbing Design Fire Protection Design Facility Management Technology Design Sustainable Design Virtual DesignOur clients tell us that what sets us apart is our talented team, high integrity and the versatility to deliver projects across a wide range of markets. Our people are specialists and experts in their respective fields, sought out for their expertise on projects regionally, nationally and worldwide. We are team players who enjoy working collaboratively with clients to find creative design solutions while successfully balancing schedule, scope, quality and budget. Call today or visit our website for more information.

Gewalt Hamilton Associates is a professional engineering firm that was formed in 1981 by Robert Hamilton and David Gewalt. Its municipal engineering services include water distribution, traffic engineering, storm and sanitary sewer design, waste water collection and transmission, and roadway design, maintenance and rehabilitation. The company offers site planning, traffic access and circulation, storm water management, utility location, permitting and construction administration services. It conducts topographic, stream, hydrographic, control, boundary and land title surveys. The firm s construction administration services include construction observation, erosion reporting, field report and record drawings preparation, shop drawing review, conduction of final inspections and assistance in final acceptance and approvals. In addition, it offers soil erosion and sediment control, natural area management, endangered and threatened species consultation, and wetland delineation, permitting and mitigation services. Gewalt Hamilton Associates has corporate headquarters in Vernon Hills, Ill.