civil engineering company in Duluth

Multidisciplinary Engineers and Architects

TKDA provides professional engineering, architecture and planning to clients in Duluth, MN. Contact us to learn more about our services.

SEH Inc. is a company of engineering, architecture, environmental and planning consultants serving public and private sector clients.

Full-service geotechnical, environmental consulting and testing firm, based in Minnesota, North Dakota, Texas, and beyond. Our experienced group of engineers understands the challenges of a varie…