Erdman Engineering, P.C. serves Northeast Iowa counties of Winneshiek, Allamakee, Clayton, Fayette, Chickasaw, Howard, Bremer, and Floyd with civil engineering and land surveying services since 1955.

Trout Run Trail, Decorah and Winneshiek County.
This multi-million dollar project completed in 2012 has been recognized with the following awards:
2013 Outstanding Civil Engineering Project Achievement presented by the Iowa Section of the ASCE, 2013 All Star Community Award presented by the Iowa League of Cities and the 2013 Honor Award for Engineering Excellence in the Transportation Category presented by the ACEC of Iowa.


Our Civil Engineering design services includes the areas of land development, street and lighting, well and water systems, sanitary and storm sewer projects, recreational trail development, airport, and housing and commercial site developments.

Our Land Surveying services include Lot, Boundary and Property Survey, Site Topography, ALTA/ASCM and Construction Site Staking utilizing GPS and Robotic data collection.

Additional Services include GIS mapping and large format scanning, reproduction and printing.