As the 9th largest engineering firm in the entire St. Louis region, TWM, Inc. provides Civil, Structural & Rail Engineering, Land Surveying, and other Geospatial Services to both public and private sector clients in Illinois, Missouri, and beyond. Over the last 74 years, we have diversified into five primary disciplines - Structures, Transportation, Land Development, Water Infrastructure, and Surveying/Geospatial. We draw upon the extensive knowledge, skills and experience of our licensed professionals, as well as our support staff, to consistently deliver cost-effective, innovative, and sensible solutions to the design challenges facing our clients.

Since the inception of the firm, TWM has provided professional land surveying and support services for the planning, design and construction of engineering and architectural projects. Land surveying has been evolving as quickly as any other industry. As technology has jumped forward every few years, the equipment and instrumentation used by surveyors has jumped forward as well. Early surveyors were responsible for creating, establishing, and recreating boundary lines for everything from a tract of land as tiny as a parcel in a small town, to larger counties, states, and even entire countries.

TWM has provided electrical engineering services for diverse projects in our main areas of expertise including Transportation, Parks and Recreation, Civic/Government Facilities, Infrastructure, Healthcare, Education, and Commercial and Residential Land Development. Our focus is to design electrical systems with special consideration given to durability, environmental sensitivity, energy-efficiency, and controllability. TWM continues the important business of supporting our nation's essential infrastructure in these uncertain times.

Using our civil engineering expertise to partner with clients to build prosperous communities is TWM's passion. Our engineers have been solving the most complex infrastructure challenges facing local, state, and federal agencies as well as private industry clients since 1946. Whether you are seeking to revitalize an aging community to attract new businesses and residents, or your goal is to simply maintain a thriving community's roadways, bridges, shared-use paths, sewers, water supply and/or drainage systems, TWM will collaborate with you to put together a comprehensive plan so you are able to balance the routine repairs and maintenance of facilities with your long-term vision for growth.

TWM has been providing customized engineering services to industrial clients for over 25 years. Our expertise ranges from barge/truck/rail loadout design to tank and catwalk support structures, as well as other necessary civil and structural engineering services for various agriculture, refinery, warehouse, harbor, and other facility improvements. At TWM, our focus is on providing you with accurate engineering designs no matter what your individualized needs might be. We have a reputation for producing easily constructible designs, which reduce the need for costly rework.

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