Founded in 1979 by Charles and Marlys Nelson, CNA specializes in Civil and Geotechnical engineering for underground projects.

Based in Minneapolis, our WBE firm offers an array of professional engineering services including: technical and economic feasibility studies, preliminary & final design, design reviews, geotechnical analysis & reports, contract documents, construction administration and special studies for our clients, contractors and owners.

Are those in: construction and mining industries, municipalities, communication companies, and energy companies in the area of mining, geotechnical, geostructural, civil, structural and construction engineering.